./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.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 355b6431f903a7e9642ff9c83d141a20cc82336cba9865af34a1f63508906235 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:26:03,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:26:03,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:26:03,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:26:03,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:26:03,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:26:03,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:26:03,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:26:03,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:26:03,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:26:03,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:26:03,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:26:03,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:26:03,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:26:03,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:26:03,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:26:03,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:26:03,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:26:03,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:26:03,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:26:03,511 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:26:03,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:26:03,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:26:03,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:26:03,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:26:03,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:26:03,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:26:03,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:26:03,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:26:03,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:26:03,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:26:03,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:26:03,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:26:03,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:26:03,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:26:03,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:26:03,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:26:03,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:26:03,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:26:03,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:26:03,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:26:03,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:26:03,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 20:26:03,549 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:26:03,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:26:03,550 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:26:03,550 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:26:03,551 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:26:03,551 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:26:03,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:26:03,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:26:03,552 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:26:03,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:26:03,552 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:26:03,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 20:26:03,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:26:03,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:26:03,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:26:03,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:26:03,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:26:03,553 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:26:03,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:26:03,554 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:26:03,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:26:03,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:26:03,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:26:03,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:26:03,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:26:03,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:26:03,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:26:03,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:26:03,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 20:26:03,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 20:26:03,556 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:26:03,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:26:03,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:26:03,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 355b6431f903a7e9642ff9c83d141a20cc82336cba9865af34a1f63508906235 [2022-07-22 20:26:03,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:26:03,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:26:03,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:26:03,785 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:26:03,785 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:26:03,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c [2022-07-22 20:26:03,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac02c79a6/6273b469313241559f081a8bade6ba75/FLAG92e0f21d9 [2022-07-22 20:26:04,363 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:26:04,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c [2022-07-22 20:26:04,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac02c79a6/6273b469313241559f081a8bade6ba75/FLAG92e0f21d9 [2022-07-22 20:26:04,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac02c79a6/6273b469313241559f081a8bade6ba75 [2022-07-22 20:26:04,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:26:04,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:26:04,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:26:04,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:26:04,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:26:04,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:26:04" (1/1) ... [2022-07-22 20:26:04,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188a5cf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:04, skipping insertion in model container [2022-07-22 20:26:04,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:26:04" (1/1) ... [2022-07-22 20:26:04,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:26:04,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:26:05,196 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c[8712,8725] [2022-07-22 20:26:05,226 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c[10587,10600] [2022-07-22 20:26:05,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:26:05,824 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:26:05,856 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c[8712,8725] [2022-07-22 20:26:05,860 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c[10587,10600] [2022-07-22 20:26:06,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:26:06,176 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:26:06,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:06 WrapperNode [2022-07-22 20:26:06,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:26:06,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:26:06,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:26:06,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:26:06,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:06" (1/1) ... [2022-07-22 20:26:06,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:06" (1/1) ... [2022-07-22 20:26:06,457 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5031 [2022-07-22 20:26:06,457 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:26:06,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:26:06,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:26:06,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:26:06,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:06" (1/1) ... [2022-07-22 20:26:06,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:06" (1/1) ... [2022-07-22 20:26:06,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:06" (1/1) ... [2022-07-22 20:26:06,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:06" (1/1) ... [2022-07-22 20:26:06,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:06" (1/1) ... [2022-07-22 20:26:06,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:06" (1/1) ... [2022-07-22 20:26:06,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:06" (1/1) ... [2022-07-22 20:26:06,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:26:06,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:26:06,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:26:06,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:26:06,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:06" (1/1) ... [2022-07-22 20:26:06,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:26:06,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:26:06,936 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) [2022-07-22 20:26:06,953 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 [2022-07-22 20:26:06,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:26:06,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 20:26:06,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:26:06,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:26:07,076 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:26:07,088 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:26:09,901 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:26:09,911 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:26:09,912 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 20:26:09,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:26:09 BoogieIcfgContainer [2022-07-22 20:26:09,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:26:09,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:26:09,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:26:09,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:26:09,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:26:04" (1/3) ... [2022-07-22 20:26:09,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35729001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:26:09, skipping insertion in model container [2022-07-22 20:26:09,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:06" (2/3) ... [2022-07-22 20:26:09,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35729001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:26:09, skipping insertion in model container [2022-07-22 20:26:09,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:26:09" (3/3) ... [2022-07-22 20:26:09,934 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label00.c [2022-07-22 20:26:09,944 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:26:09,945 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:26:10,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:26:10,018 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@6749a8cc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4bec2456 [2022-07-22 20:26:10,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:26:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:10,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 20:26:10,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:10,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:10,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:10,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:10,036 INFO L85 PathProgramCache]: Analyzing trace with hash -944947467, now seen corresponding path program 1 times [2022-07-22 20:26:10,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:10,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41010734] [2022-07-22 20:26:10,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:10,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:10,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:10,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41010734] [2022-07-22 20:26:10,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41010734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:10,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:10,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 20:26:10,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106268256] [2022-07-22 20:26:10,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:10,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:10,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:10,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:10,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:10,190 INFO L87 Difference]: Start difference. First operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:13,173 INFO L93 Difference]: Finished difference Result 2514 states and 4838 transitions. [2022-07-22 20:26:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:13,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-07-22 20:26:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:13,191 INFO L225 Difference]: With dead ends: 2514 [2022-07-22 20:26:13,191 INFO L226 Difference]: Without dead ends: 1580 [2022-07-22 20:26:13,195 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 [2022-07-22 20:26:13,197 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 1006 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:13,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1006 Valid, 282 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 20:26:13,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-07-22 20:26:13,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2022-07-22 20:26:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1578 states have (on average 1.8390367553865652) internal successors, (2902), 1579 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2902 transitions. [2022-07-22 20:26:13,263 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2902 transitions. Word has length 16 [2022-07-22 20:26:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:13,263 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 2902 transitions. [2022-07-22 20:26:13,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2902 transitions. [2022-07-22 20:26:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 20:26:13,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:13,264 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] [2022-07-22 20:26:13,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 20:26:13,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2022-07-22 20:26:13,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:13,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891438161] [2022-07-22 20:26:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:13,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:13,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:13,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891438161] [2022-07-22 20:26:13,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891438161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:13,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:13,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:26:13,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771327279] [2022-07-22 20:26:13,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:13,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:26:13,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:13,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:26:13,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:26:13,313 INFO L87 Difference]: Start difference. First operand 1580 states and 2902 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:13,358 INFO L93 Difference]: Finished difference Result 1630 states and 2978 transitions. [2022-07-22 20:26:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:26:13,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-07-22 20:26:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:13,364 INFO L225 Difference]: With dead ends: 1630 [2022-07-22 20:26:13,364 INFO L226 Difference]: Without dead ends: 1580 [2022-07-22 20:26:13,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:26:13,366 INFO L413 NwaCegarLoop]: 1561 mSDtfsCounter, 3 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6218 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:13,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6218 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:13,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-07-22 20:26:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2022-07-22 20:26:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1578 states have (on average 1.8244613434727504) internal successors, (2879), 1579 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2879 transitions. [2022-07-22 20:26:13,388 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2879 transitions. Word has length 30 [2022-07-22 20:26:13,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:13,388 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 2879 transitions. [2022-07-22 20:26:13,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2879 transitions. [2022-07-22 20:26:13,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 20:26:13,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:13,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:13,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 20:26:13,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:13,391 INFO L85 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2022-07-22 20:26:13,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:13,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404388371] [2022-07-22 20:26:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:13,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:13,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:13,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404388371] [2022-07-22 20:26:13,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404388371] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:13,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:13,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:26:13,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479647521] [2022-07-22 20:26:13,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:13,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:26:13,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:13,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:26:13,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:26:13,462 INFO L87 Difference]: Start difference. First operand 1580 states and 2879 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:13,563 INFO L93 Difference]: Finished difference Result 1948 states and 3455 transitions. [2022-07-22 20:26:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 20:26:13,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-07-22 20:26:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:13,569 INFO L225 Difference]: With dead ends: 1948 [2022-07-22 20:26:13,570 INFO L226 Difference]: Without dead ends: 1902 [2022-07-22 20:26:13,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:26:13,571 INFO L413 NwaCegarLoop]: 1534 mSDtfsCounter, 6574 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6574 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:13,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6574 Valid, 2078 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2022-07-22 20:26:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1624. [2022-07-22 20:26:13,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1622 states have (on average 1.8175092478421702) internal successors, (2948), 1623 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2948 transitions. [2022-07-22 20:26:13,597 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2948 transitions. Word has length 52 [2022-07-22 20:26:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:13,598 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2948 transitions. [2022-07-22 20:26:13,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2948 transitions. [2022-07-22 20:26:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 20:26:13,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:13,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:13,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 20:26:13,600 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:13,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:13,600 INFO L85 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2022-07-22 20:26:13,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:13,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646762310] [2022-07-22 20:26:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:13,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:13,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:13,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646762310] [2022-07-22 20:26:13,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646762310] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:13,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:13,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:13,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307011598] [2022-07-22 20:26:13,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:13,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:13,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:13,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:13,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:13,649 INFO L87 Difference]: Start difference. First operand 1624 states and 2948 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:13,681 INFO L93 Difference]: Finished difference Result 1793 states and 3211 transitions. [2022-07-22 20:26:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:13,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-07-22 20:26:13,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:13,687 INFO L225 Difference]: With dead ends: 1793 [2022-07-22 20:26:13,687 INFO L226 Difference]: Without dead ends: 1703 [2022-07-22 20:26:13,688 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 [2022-07-22 20:26:13,689 INFO L413 NwaCegarLoop]: 1536 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:13,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1480 Valid, 1601 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-07-22 20:26:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1699. [2022-07-22 20:26:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1697 states have (on average 1.804360636417207) internal successors, (3062), 1698 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3062 transitions. [2022-07-22 20:26:13,717 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3062 transitions. Word has length 54 [2022-07-22 20:26:13,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:13,718 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 3062 transitions. [2022-07-22 20:26:13,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3062 transitions. [2022-07-22 20:26:13,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 20:26:13,719 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:13,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:13,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 20:26:13,719 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:13,720 INFO L85 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2022-07-22 20:26:13,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:13,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821464794] [2022-07-22 20:26:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:13,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:13,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:13,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821464794] [2022-07-22 20:26:13,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821464794] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:13,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:13,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:26:13,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702071278] [2022-07-22 20:26:13,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:13,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:26:13,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:13,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:26:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:26:13,820 INFO L87 Difference]: Start difference. First operand 1699 states and 3062 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:13,912 INFO L93 Difference]: Finished difference Result 1866 states and 3318 transitions. [2022-07-22 20:26:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:26:13,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-07-22 20:26:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:13,918 INFO L225 Difference]: With dead ends: 1866 [2022-07-22 20:26:13,918 INFO L226 Difference]: Without dead ends: 1701 [2022-07-22 20:26:13,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:26:13,919 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 1593 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:13,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1593 Valid, 1814 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-07-22 20:26:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2022-07-22 20:26:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1697 states have (on average 1.803182086034178) internal successors, (3060), 1698 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3060 transitions. [2022-07-22 20:26:13,948 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3060 transitions. Word has length 54 [2022-07-22 20:26:13,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:13,949 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 3060 transitions. [2022-07-22 20:26:13,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:13,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3060 transitions. [2022-07-22 20:26:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 20:26:13,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:13,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:13,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 20:26:13,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:13,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:13,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2022-07-22 20:26:13,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:13,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392361559] [2022-07-22 20:26:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:13,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:14,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:14,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392361559] [2022-07-22 20:26:14,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392361559] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:14,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:14,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:14,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822769234] [2022-07-22 20:26:14,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:14,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:14,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:14,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:14,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:14,005 INFO L87 Difference]: Start difference. First operand 1699 states and 3060 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:14,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:14,083 INFO L93 Difference]: Finished difference Result 2005 states and 3526 transitions. [2022-07-22 20:26:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:14,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-07-22 20:26:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:14,090 INFO L225 Difference]: With dead ends: 2005 [2022-07-22 20:26:14,090 INFO L226 Difference]: Without dead ends: 1840 [2022-07-22 20:26:14,091 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 [2022-07-22 20:26:14,091 INFO L413 NwaCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:14,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 1639 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2022-07-22 20:26:14,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1838. [2022-07-22 20:26:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1836 states have (on average 1.7799564270152506) internal successors, (3268), 1837 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 3268 transitions. [2022-07-22 20:26:14,134 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 3268 transitions. Word has length 54 [2022-07-22 20:26:14,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:14,135 INFO L495 AbstractCegarLoop]: Abstraction has 1838 states and 3268 transitions. [2022-07-22 20:26:14,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:14,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 3268 transitions. [2022-07-22 20:26:14,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 20:26:14,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:14,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:14,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 20:26:14,136 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:14,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:14,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2022-07-22 20:26:14,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:14,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93826499] [2022-07-22 20:26:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:14,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:14,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:14,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93826499] [2022-07-22 20:26:14,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93826499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:14,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:14,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:14,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541815984] [2022-07-22 20:26:14,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:14,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:14,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:14,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:14,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:14,168 INFO L87 Difference]: Start difference. First operand 1838 states and 3268 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:14,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:14,219 INFO L93 Difference]: Finished difference Result 2398 states and 4110 transitions. [2022-07-22 20:26:14,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:14,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-07-22 20:26:14,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:14,226 INFO L225 Difference]: With dead ends: 2398 [2022-07-22 20:26:14,227 INFO L226 Difference]: Without dead ends: 2094 [2022-07-22 20:26:14,228 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 [2022-07-22 20:26:14,228 INFO L413 NwaCegarLoop]: 1570 mSDtfsCounter, 1493 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:14,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1493 Valid, 1648 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2022-07-22 20:26:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2092. [2022-07-22 20:26:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2090 states have (on average 1.7416267942583732) internal successors, (3640), 2091 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 3640 transitions. [2022-07-22 20:26:14,290 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 3640 transitions. Word has length 54 [2022-07-22 20:26:14,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:14,290 INFO L495 AbstractCegarLoop]: Abstraction has 2092 states and 3640 transitions. [2022-07-22 20:26:14,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 3640 transitions. [2022-07-22 20:26:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 20:26:14,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:14,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:14,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 20:26:14,292 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:14,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2022-07-22 20:26:14,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:14,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721492185] [2022-07-22 20:26:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:14,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:14,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:14,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721492185] [2022-07-22 20:26:14,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721492185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:14,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:14,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:14,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976840802] [2022-07-22 20:26:14,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:14,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:14,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:14,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:14,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:14,320 INFO L87 Difference]: Start difference. First operand 2092 states and 3640 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:14,396 INFO L93 Difference]: Finished difference Result 3112 states and 5146 transitions. [2022-07-22 20:26:14,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:14,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-07-22 20:26:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:14,405 INFO L225 Difference]: With dead ends: 3112 [2022-07-22 20:26:14,405 INFO L226 Difference]: Without dead ends: 2554 [2022-07-22 20:26:14,407 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 [2022-07-22 20:26:14,407 INFO L413 NwaCegarLoop]: 1583 mSDtfsCounter, 1497 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:14,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1497 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:14,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2022-07-22 20:26:14,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2552. [2022-07-22 20:26:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2550 states have (on average 1.6847058823529413) internal successors, (4296), 2551 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4296 transitions. [2022-07-22 20:26:14,494 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4296 transitions. Word has length 54 [2022-07-22 20:26:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:14,494 INFO L495 AbstractCegarLoop]: Abstraction has 2552 states and 4296 transitions. [2022-07-22 20:26:14,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4296 transitions. [2022-07-22 20:26:14,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 20:26:14,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:14,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:14,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 20:26:14,496 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2022-07-22 20:26:14,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:14,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013482101] [2022-07-22 20:26:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:14,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:14,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:14,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013482101] [2022-07-22 20:26:14,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013482101] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:14,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:14,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:26:14,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926619962] [2022-07-22 20:26:14,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:14,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:26:14,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:14,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:26:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:26:14,556 INFO L87 Difference]: Start difference. First operand 2552 states and 4296 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:14,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:14,772 INFO L93 Difference]: Finished difference Result 3322 states and 5397 transitions. [2022-07-22 20:26:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:26:14,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-07-22 20:26:14,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:14,783 INFO L225 Difference]: With dead ends: 3322 [2022-07-22 20:26:14,783 INFO L226 Difference]: Without dead ends: 3320 [2022-07-22 20:26:14,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-22 20:26:14,785 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 498 mSDsluCounter, 9002 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 10579 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:14,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 10579 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:14,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2022-07-22 20:26:14,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 2600. [2022-07-22 20:26:14,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2598 states have (on average 1.6689761354888375) internal successors, (4336), 2599 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:14,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 4336 transitions. [2022-07-22 20:26:14,893 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 4336 transitions. Word has length 55 [2022-07-22 20:26:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:14,893 INFO L495 AbstractCegarLoop]: Abstraction has 2600 states and 4336 transitions. [2022-07-22 20:26:14,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 4336 transitions. [2022-07-22 20:26:14,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 20:26:14,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:14,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:14,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 20:26:14,895 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:14,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:14,895 INFO L85 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2022-07-22 20:26:14,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:14,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928596718] [2022-07-22 20:26:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:14,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:14,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:14,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928596718] [2022-07-22 20:26:14,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928596718] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:14,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:14,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:14,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073808786] [2022-07-22 20:26:14,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:14,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:14,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:14,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:14,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:14,920 INFO L87 Difference]: Start difference. First operand 2600 states and 4336 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:15,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:15,023 INFO L93 Difference]: Finished difference Result 3695 states and 5926 transitions. [2022-07-22 20:26:15,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:15,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2022-07-22 20:26:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:15,032 INFO L225 Difference]: With dead ends: 3695 [2022-07-22 20:26:15,033 INFO L226 Difference]: Without dead ends: 3084 [2022-07-22 20:26:15,035 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 [2022-07-22 20:26:15,035 INFO L413 NwaCegarLoop]: 1591 mSDtfsCounter, 1498 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:15,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 1661 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2022-07-22 20:26:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 3082. [2022-07-22 20:26:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 3080 states have (on average 1.6266233766233766) internal successors, (5010), 3081 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 5010 transitions. [2022-07-22 20:26:15,170 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 5010 transitions. Word has length 56 [2022-07-22 20:26:15,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:15,170 INFO L495 AbstractCegarLoop]: Abstraction has 3082 states and 5010 transitions. [2022-07-22 20:26:15,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 5010 transitions. [2022-07-22 20:26:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:26:15,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:15,172 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:26:15,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 20:26:15,172 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:15,172 INFO L85 PathProgramCache]: Analyzing trace with hash 457839235, now seen corresponding path program 1 times [2022-07-22 20:26:15,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:15,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578298834] [2022-07-22 20:26:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:15,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 20:26:15,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:15,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578298834] [2022-07-22 20:26:15,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578298834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:15,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:15,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:26:15,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139089913] [2022-07-22 20:26:15,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:15,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:26:15,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:15,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:26:15,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:26:15,216 INFO L87 Difference]: Start difference. First operand 3082 states and 5010 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:15,572 INFO L93 Difference]: Finished difference Result 9588 states and 14251 transitions. [2022-07-22 20:26:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:26:15,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 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 79 [2022-07-22 20:26:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:15,591 INFO L225 Difference]: With dead ends: 9588 [2022-07-22 20:26:15,591 INFO L226 Difference]: Without dead ends: 8042 [2022-07-22 20:26:15,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:26:15,597 INFO L413 NwaCegarLoop]: 1601 mSDtfsCounter, 4790 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4790 SdHoareTripleChecker+Valid, 3371 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:15,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4790 Valid, 3371 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:15,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8042 states. [2022-07-22 20:26:15,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8042 to 4626. [2022-07-22 20:26:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 4624 states have (on average 1.5540657439446366) internal successors, (7186), 4625 states have internal predecessors, (7186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:15,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7186 transitions. [2022-07-22 20:26:15,817 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7186 transitions. Word has length 79 [2022-07-22 20:26:15,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:15,817 INFO L495 AbstractCegarLoop]: Abstraction has 4626 states and 7186 transitions. [2022-07-22 20:26:15,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7186 transitions. [2022-07-22 20:26:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:26:15,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:15,819 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:26:15,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 20:26:15,819 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:15,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:15,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1705346851, now seen corresponding path program 1 times [2022-07-22 20:26:15,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:15,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846976674] [2022-07-22 20:26:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:15,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 20:26:15,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:15,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846976674] [2022-07-22 20:26:15,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846976674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:15,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:15,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:26:15,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198409818] [2022-07-22 20:26:15,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:15,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:26:15,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:15,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:26:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:26:15,917 INFO L87 Difference]: Start difference. First operand 4626 states and 7186 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:16,353 INFO L93 Difference]: Finished difference Result 11132 states and 16427 transitions. [2022-07-22 20:26:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:26:16,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 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 79 [2022-07-22 20:26:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:16,374 INFO L225 Difference]: With dead ends: 11132 [2022-07-22 20:26:16,375 INFO L226 Difference]: Without dead ends: 9586 [2022-07-22 20:26:16,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:26:16,379 INFO L413 NwaCegarLoop]: 1603 mSDtfsCounter, 4739 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4739 SdHoareTripleChecker+Valid, 3418 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:16,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4739 Valid, 3418 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9586 states. [2022-07-22 20:26:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9586 to 6946. [2022-07-22 20:26:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6946 states, 6944 states have (on average 1.502016129032258) internal successors, (10430), 6945 states have internal predecessors, (10430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6946 states to 6946 states and 10430 transitions. [2022-07-22 20:26:16,799 INFO L78 Accepts]: Start accepts. Automaton has 6946 states and 10430 transitions. Word has length 79 [2022-07-22 20:26:16,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:16,799 INFO L495 AbstractCegarLoop]: Abstraction has 6946 states and 10430 transitions. [2022-07-22 20:26:16,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 6946 states and 10430 transitions. [2022-07-22 20:26:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:26:16,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:16,801 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:26:16,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 20:26:16,801 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:16,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1979034563, now seen corresponding path program 1 times [2022-07-22 20:26:16,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:16,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598381232] [2022-07-22 20:26:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:16,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 20:26:16,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:16,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598381232] [2022-07-22 20:26:16,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598381232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:16,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:16,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:26:16,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726870180] [2022-07-22 20:26:16,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:16,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:26:16,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:16,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:26:16,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:26:16,843 INFO L87 Difference]: Start difference. First operand 6946 states and 10430 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:17,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:17,395 INFO L93 Difference]: Finished difference Result 12676 states and 18603 transitions. [2022-07-22 20:26:17,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:26:17,396 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 79 [2022-07-22 20:26:17,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:17,412 INFO L225 Difference]: With dead ends: 12676 [2022-07-22 20:26:17,412 INFO L226 Difference]: Without dead ends: 11130 [2022-07-22 20:26:17,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:26:17,417 INFO L413 NwaCegarLoop]: 1601 mSDtfsCounter, 4770 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4770 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:17,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4770 Valid, 3408 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:17,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11130 states. [2022-07-22 20:26:17,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11130 to 8490. [2022-07-22 20:26:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8488 states have (on average 1.4851555136663526) internal successors, (12606), 8489 states have internal predecessors, (12606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12606 transitions. [2022-07-22 20:26:17,951 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12606 transitions. Word has length 79 [2022-07-22 20:26:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:17,951 INFO L495 AbstractCegarLoop]: Abstraction has 8490 states and 12606 transitions. [2022-07-22 20:26:17,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12606 transitions. [2022-07-22 20:26:17,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 20:26:17,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:17,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:17,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 20:26:17,954 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:17,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:17,955 INFO L85 PathProgramCache]: Analyzing trace with hash 547636123, now seen corresponding path program 1 times [2022-07-22 20:26:17,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:17,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094206791] [2022-07-22 20:26:17,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:17,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:17,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:17,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094206791] [2022-07-22 20:26:17,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094206791] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:17,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:17,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:17,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083734306] [2022-07-22 20:26:17,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:17,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:17,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:17,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:17,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:17,986 INFO L87 Difference]: Start difference. First operand 8490 states and 12606 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:18,275 INFO L93 Difference]: Finished difference Result 13416 states and 19623 transitions. [2022-07-22 20:26:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:18,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2022-07-22 20:26:18,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:18,286 INFO L225 Difference]: With dead ends: 13416 [2022-07-22 20:26:18,287 INFO L226 Difference]: Without dead ends: 6462 [2022-07-22 20:26:18,295 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 [2022-07-22 20:26:18,296 INFO L413 NwaCegarLoop]: 1572 mSDtfsCounter, 45 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:18,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 3096 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2022-07-22 20:26:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 6460. [2022-07-22 20:26:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6460 states, 6458 states have (on average 1.5100650356147414) internal successors, (9752), 6459 states have internal predecessors, (9752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6460 states to 6460 states and 9752 transitions. [2022-07-22 20:26:18,587 INFO L78 Accepts]: Start accepts. Automaton has 6460 states and 9752 transitions. Word has length 81 [2022-07-22 20:26:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:18,587 INFO L495 AbstractCegarLoop]: Abstraction has 6460 states and 9752 transitions. [2022-07-22 20:26:18,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 6460 states and 9752 transitions. [2022-07-22 20:26:18,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 20:26:18,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:18,589 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:26:18,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 20:26:18,589 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:18,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:18,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1706064798, now seen corresponding path program 1 times [2022-07-22 20:26:18,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:18,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658256404] [2022-07-22 20:26:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:18,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:26:18,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:18,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658256404] [2022-07-22 20:26:18,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658256404] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:18,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:18,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:26:18,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639842533] [2022-07-22 20:26:18,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:18,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:26:18,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:26:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:26:18,642 INFO L87 Difference]: Start difference. First operand 6460 states and 9752 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:19,134 INFO L93 Difference]: Finished difference Result 10822 states and 15965 transitions. [2022-07-22 20:26:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:26:19,135 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 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 81 [2022-07-22 20:26:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:19,150 INFO L225 Difference]: With dead ends: 10822 [2022-07-22 20:26:19,150 INFO L226 Difference]: Without dead ends: 9732 [2022-07-22 20:26:19,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:26:19,154 INFO L413 NwaCegarLoop]: 1600 mSDtfsCounter, 4758 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4758 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:19,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4758 Valid, 3390 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9732 states. [2022-07-22 20:26:19,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9732 to 7548. [2022-07-22 20:26:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7548 states, 7546 states have (on average 1.495891863238802) internal successors, (11288), 7547 states have internal predecessors, (11288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7548 states to 7548 states and 11288 transitions. [2022-07-22 20:26:19,529 INFO L78 Accepts]: Start accepts. Automaton has 7548 states and 11288 transitions. Word has length 81 [2022-07-22 20:26:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:19,530 INFO L495 AbstractCegarLoop]: Abstraction has 7548 states and 11288 transitions. [2022-07-22 20:26:19,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 7548 states and 11288 transitions. [2022-07-22 20:26:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 20:26:19,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:19,532 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:26:19,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 20:26:19,532 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:19,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:19,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1625443301, now seen corresponding path program 1 times [2022-07-22 20:26:19,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:19,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012555120] [2022-07-22 20:26:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:19,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:19,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:19,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012555120] [2022-07-22 20:26:19,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012555120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:19,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:19,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:19,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814421721] [2022-07-22 20:26:19,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:19,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:19,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:19,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:19,561 INFO L87 Difference]: Start difference. First operand 7548 states and 11288 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:19,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:19,743 INFO L93 Difference]: Finished difference Result 10544 states and 15514 transitions. [2022-07-22 20:26:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:19,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-07-22 20:26:19,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:19,752 INFO L225 Difference]: With dead ends: 10544 [2022-07-22 20:26:19,752 INFO L226 Difference]: Without dead ends: 4558 [2022-07-22 20:26:19,758 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 [2022-07-22 20:26:19,759 INFO L413 NwaCegarLoop]: 1565 mSDtfsCounter, 39 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3081 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:19,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3081 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4558 states. [2022-07-22 20:26:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4558 to 4556. [2022-07-22 20:26:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4556 states, 4554 states have (on average 1.541501976284585) internal successors, (7020), 4555 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4556 states to 4556 states and 7020 transitions. [2022-07-22 20:26:20,014 INFO L78 Accepts]: Start accepts. Automaton has 4556 states and 7020 transitions. Word has length 82 [2022-07-22 20:26:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:20,014 INFO L495 AbstractCegarLoop]: Abstraction has 4556 states and 7020 transitions. [2022-07-22 20:26:20,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4556 states and 7020 transitions. [2022-07-22 20:26:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 20:26:20,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:20,018 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:26:20,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 20:26:20,019 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:20,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:20,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1082921701, now seen corresponding path program 1 times [2022-07-22 20:26:20,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:20,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854533076] [2022-07-22 20:26:20,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:20,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:20,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:20,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854533076] [2022-07-22 20:26:20,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854533076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:20,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:20,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589525468] [2022-07-22 20:26:20,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:20,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:20,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:20,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:20,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:20,053 INFO L87 Difference]: Start difference. First operand 4556 states and 7020 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:20,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:20,153 INFO L93 Difference]: Finished difference Result 6056 states and 9112 transitions. [2022-07-22 20:26:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:20,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-07-22 20:26:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:20,159 INFO L225 Difference]: With dead ends: 6056 [2022-07-22 20:26:20,159 INFO L226 Difference]: Without dead ends: 3062 [2022-07-22 20:26:20,162 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 [2022-07-22 20:26:20,163 INFO L413 NwaCegarLoop]: 1558 mSDtfsCounter, 35 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:20,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3066 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2022-07-22 20:26:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3060. [2022-07-22 20:26:20,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 3058 states have (on average 1.6049705689993459) internal successors, (4908), 3059 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 4908 transitions. [2022-07-22 20:26:20,273 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 4908 transitions. Word has length 82 [2022-07-22 20:26:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:20,274 INFO L495 AbstractCegarLoop]: Abstraction has 3060 states and 4908 transitions. [2022-07-22 20:26:20,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 4908 transitions. [2022-07-22 20:26:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 20:26:20,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:20,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:20,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 20:26:20,275 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:20,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:20,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1170040495, now seen corresponding path program 1 times [2022-07-22 20:26:20,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:20,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911086657] [2022-07-22 20:26:20,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:20,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:20,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:20,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911086657] [2022-07-22 20:26:20,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911086657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:20,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:20,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:20,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160533589] [2022-07-22 20:26:20,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:20,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:20,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:20,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:20,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:20,322 INFO L87 Difference]: Start difference. First operand 3060 states and 4908 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:20,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:20,381 INFO L93 Difference]: Finished difference Result 3812 states and 5944 transitions. [2022-07-22 20:26:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:20,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-07-22 20:26:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:20,385 INFO L225 Difference]: With dead ends: 3812 [2022-07-22 20:26:20,385 INFO L226 Difference]: Without dead ends: 2314 [2022-07-22 20:26:20,387 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 [2022-07-22 20:26:20,387 INFO L413 NwaCegarLoop]: 1551 mSDtfsCounter, 31 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3051 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:20,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3051 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:20,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-07-22 20:26:20,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2312. [2022-07-22 20:26:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2310 states have (on average 1.6722943722943724) internal successors, (3863), 2311 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 3863 transitions. [2022-07-22 20:26:20,450 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 3863 transitions. Word has length 82 [2022-07-22 20:26:20,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:20,450 INFO L495 AbstractCegarLoop]: Abstraction has 2312 states and 3863 transitions. [2022-07-22 20:26:20,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 3863 transitions. [2022-07-22 20:26:20,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 20:26:20,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:20,451 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:26:20,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 20:26:20,452 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:20,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:20,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2005651591, now seen corresponding path program 1 times [2022-07-22 20:26:20,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:20,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254897182] [2022-07-22 20:26:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:20,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:20,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:20,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254897182] [2022-07-22 20:26:20,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254897182] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:26:20,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197684847] [2022-07-22 20:26:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:20,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:26:20,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:26:20,647 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) [2022-07-22 20:26:20,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 20:26:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:20,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 20:26:20,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:26:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:26:20,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:26:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:26:21,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197684847] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:26:21,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:26:21,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2022-07-22 20:26:21,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233508487] [2022-07-22 20:26:21,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:26:21,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 20:26:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:21,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 20:26:21,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-22 20:26:21,111 INFO L87 Difference]: Start difference. First operand 2312 states and 3863 transitions. Second operand has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:24,000 INFO L93 Difference]: Finished difference Result 11471 states and 16074 transitions. [2022-07-22 20:26:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-22 20:26:24,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 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 82 [2022-07-22 20:26:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:24,018 INFO L225 Difference]: With dead ends: 11471 [2022-07-22 20:26:24,018 INFO L226 Difference]: Without dead ends: 10721 [2022-07-22 20:26:24,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2022-07-22 20:26:24,025 INFO L413 NwaCegarLoop]: 1547 mSDtfsCounter, 17718 mSDsluCounter, 5128 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17718 SdHoareTripleChecker+Valid, 6675 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:24,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17718 Valid, 6675 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 20:26:24,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10721 states. [2022-07-22 20:26:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10721 to 7981. [2022-07-22 20:26:24,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7979 states have (on average 1.3937836821656848) internal successors, (11121), 7980 states have internal predecessors, (11121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 11121 transitions. [2022-07-22 20:26:24,581 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 11121 transitions. Word has length 82 [2022-07-22 20:26:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:24,584 INFO L495 AbstractCegarLoop]: Abstraction has 7981 states and 11121 transitions. [2022-07-22 20:26:24,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 11121 transitions. [2022-07-22 20:26:24,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 20:26:24,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:24,586 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:26:24,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 20:26:24,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:26:24,800 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:24,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:24,800 INFO L85 PathProgramCache]: Analyzing trace with hash -10585946, now seen corresponding path program 1 times [2022-07-22 20:26:24,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:24,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839715187] [2022-07-22 20:26:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:24,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:24,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:24,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839715187] [2022-07-22 20:26:24,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839715187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:26:24,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085876872] [2022-07-22 20:26:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:24,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:26:24,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:26:24,984 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) [2022-07-22 20:26:24,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 20:26:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:25,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 20:26:25,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:26:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:25,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:26:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:25,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085876872] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:26:25,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:26:25,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-22 20:26:25,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950830207] [2022-07-22 20:26:25,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:26:25,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 20:26:25,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:25,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 20:26:25,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-07-22 20:26:25,956 INFO L87 Difference]: Start difference. First operand 7981 states and 11121 transitions. Second operand has 21 states, 21 states have (on average 8.857142857142858) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:28,570 INFO L93 Difference]: Finished difference Result 30839 states and 40667 transitions. [2022-07-22 20:26:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:26:28,571 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.857142857142858) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 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 83 [2022-07-22 20:26:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:28,605 INFO L225 Difference]: With dead ends: 30839 [2022-07-22 20:26:28,605 INFO L226 Difference]: Without dead ends: 24712 [2022-07-22 20:26:28,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2022-07-22 20:26:28,615 INFO L413 NwaCegarLoop]: 1534 mSDtfsCounter, 12690 mSDsluCounter, 3805 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12690 SdHoareTripleChecker+Valid, 5339 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:28,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12690 Valid, 5339 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 20:26:28,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24712 states. [2022-07-22 20:26:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24712 to 15888. [2022-07-22 20:26:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15888 states, 15886 states have (on average 1.3209114943975828) internal successors, (20984), 15887 states have internal predecessors, (20984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15888 states to 15888 states and 20984 transitions. [2022-07-22 20:26:30,088 INFO L78 Accepts]: Start accepts. Automaton has 15888 states and 20984 transitions. Word has length 83 [2022-07-22 20:26:30,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:30,088 INFO L495 AbstractCegarLoop]: Abstraction has 15888 states and 20984 transitions. [2022-07-22 20:26:30,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.857142857142858) internal successors, (186), 20 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:30,089 INFO L276 IsEmpty]: Start isEmpty. Operand 15888 states and 20984 transitions. [2022-07-22 20:26:30,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 20:26:30,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:30,090 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:26:30,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 20:26:30,307 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,SelfDestructingSolverStorable19 [2022-07-22 20:26:30,307 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:30,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:30,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1875749690, now seen corresponding path program 1 times [2022-07-22 20:26:30,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:30,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484230117] [2022-07-22 20:26:30,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:30,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:30,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:30,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484230117] [2022-07-22 20:26:30,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484230117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:26:30,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301150390] [2022-07-22 20:26:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:30,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:26:30,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:26:30,417 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) [2022-07-22 20:26:30,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 20:26:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:30,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 20:26:30,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:26:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:31,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:26:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:32,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301150390] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:26:32,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:26:32,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2022-07-22 20:26:32,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787164763] [2022-07-22 20:26:32,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:26:32,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 20:26:32,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 20:26:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-07-22 20:26:32,206 INFO L87 Difference]: Start difference. First operand 15888 states and 20984 transitions. Second operand has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:45,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:45,938 INFO L93 Difference]: Finished difference Result 100044 states and 128842 transitions. [2022-07-22 20:26:45,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-22 20:26:45,938 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 0 states have call successors, (0), 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 83 [2022-07-22 20:26:45,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:46,061 INFO L225 Difference]: With dead ends: 100044 [2022-07-22 20:26:46,061 INFO L226 Difference]: Without dead ends: 86902 [2022-07-22 20:26:46,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3841 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2150, Invalid=9622, Unknown=0, NotChecked=0, Total=11772 [2022-07-22 20:26:46,092 INFO L413 NwaCegarLoop]: 1608 mSDtfsCounter, 14059 mSDsluCounter, 13777 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14059 SdHoareTripleChecker+Valid, 15385 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:46,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14059 Valid, 15385 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 20:26:46,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86902 states. [2022-07-22 20:26:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86902 to 40496. [2022-07-22 20:26:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40496 states, 40494 states have (on average 1.2726082876475526) internal successors, (51533), 40495 states have internal predecessors, (51533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40496 states to 40496 states and 51533 transitions. [2022-07-22 20:26:51,429 INFO L78 Accepts]: Start accepts. Automaton has 40496 states and 51533 transitions. Word has length 83 [2022-07-22 20:26:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:51,430 INFO L495 AbstractCegarLoop]: Abstraction has 40496 states and 51533 transitions. [2022-07-22 20:26:51,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 40496 states and 51533 transitions. [2022-07-22 20:26:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 20:26:51,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:51,432 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:26:51,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 20:26:51,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:26:51,648 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:51,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1855953112, now seen corresponding path program 1 times [2022-07-22 20:26:51,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:51,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848030778] [2022-07-22 20:26:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:51,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 20:26:51,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:51,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848030778] [2022-07-22 20:26:51,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848030778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:51,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:51,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:26:51,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180884665] [2022-07-22 20:26:51,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:51,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:26:51,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:51,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:26:51,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:26:51,685 INFO L87 Difference]: Start difference. First operand 40496 states and 51533 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:54,913 INFO L93 Difference]: Finished difference Result 63030 states and 79793 transitions. [2022-07-22 20:26:54,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:26:54,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 83 [2022-07-22 20:26:54,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:54,948 INFO L225 Difference]: With dead ends: 63030 [2022-07-22 20:26:54,948 INFO L226 Difference]: Without dead ends: 24179 [2022-07-22 20:26:54,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:26:54,978 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 4607 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4607 SdHoareTripleChecker+Valid, 2980 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:54,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4607 Valid, 2980 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:55,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24179 states. [2022-07-22 20:26:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24179 to 24179. [2022-07-22 20:26:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24179 states, 24177 states have (on average 1.267816519832899) internal successors, (30652), 24178 states have internal predecessors, (30652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24179 states to 24179 states and 30652 transitions. [2022-07-22 20:26:58,071 INFO L78 Accepts]: Start accepts. Automaton has 24179 states and 30652 transitions. Word has length 83 [2022-07-22 20:26:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:58,071 INFO L495 AbstractCegarLoop]: Abstraction has 24179 states and 30652 transitions. [2022-07-22 20:26:58,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:26:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 24179 states and 30652 transitions. [2022-07-22 20:26:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 20:26:58,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:58,073 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:26:58,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 20:26:58,073 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1741675261, now seen corresponding path program 1 times [2022-07-22 20:26:58,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:58,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753911809] [2022-07-22 20:26:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:58,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:58,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:58,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753911809] [2022-07-22 20:26:58,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753911809] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:26:58,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196725420] [2022-07-22 20:26:58,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:58,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:26:58,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:26:58,183 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) [2022-07-22 20:26:58,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 20:26:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:58,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 20:26:58,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:26:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:58,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:26:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:59,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196725420] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:26:59,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:26:59,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-22 20:26:59,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888650446] [2022-07-22 20:26:59,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:26:59,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 20:26:59,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 20:26:59,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-22 20:26:59,113 INFO L87 Difference]: Start difference. First operand 24179 states and 30652 transitions. Second operand has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 20 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) [2022-07-22 20:27:11,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:27:11,893 INFO L93 Difference]: Finished difference Result 110724 states and 136008 transitions. [2022-07-22 20:27:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 20:27:11,894 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 20 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 84 [2022-07-22 20:27:11,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:27:12,013 INFO L225 Difference]: With dead ends: 110724 [2022-07-22 20:27:12,013 INFO L226 Difference]: Without dead ends: 91629 [2022-07-22 20:27:12,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 20:27:12,054 INFO L413 NwaCegarLoop]: 1532 mSDtfsCounter, 12509 mSDsluCounter, 4860 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12509 SdHoareTripleChecker+Valid, 6392 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:27:12,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12509 Valid, 6392 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 20:27:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91629 states. [2022-07-22 20:27:20,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91629 to 61759. [2022-07-22 20:27:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61759 states, 61757 states have (on average 1.2347588127661642) internal successors, (76255), 61758 states have internal predecessors, (76255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:27:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61759 states to 61759 states and 76255 transitions. [2022-07-22 20:27:20,760 INFO L78 Accepts]: Start accepts. Automaton has 61759 states and 76255 transitions. Word has length 84 [2022-07-22 20:27:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:27:20,760 INFO L495 AbstractCegarLoop]: Abstraction has 61759 states and 76255 transitions. [2022-07-22 20:27:20,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 20 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) [2022-07-22 20:27:20,761 INFO L276 IsEmpty]: Start isEmpty. Operand 61759 states and 76255 transitions. [2022-07-22 20:27:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 20:27:20,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:27:20,762 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:27:20,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 20:27:20,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:27:20,980 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:27:20,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:27:20,981 INFO L85 PathProgramCache]: Analyzing trace with hash -307712581, now seen corresponding path program 1 times [2022-07-22 20:27:20,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:27:20,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674223442] [2022-07-22 20:27:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:20,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:27:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 20:27:21,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:27:21,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674223442] [2022-07-22 20:27:21,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674223442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:27:21,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:27:21,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:27:21,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150407015] [2022-07-22 20:27:21,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:27:21,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:27:21,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:27:21,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:27:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:27:21,057 INFO L87 Difference]: Start difference. First operand 61759 states and 76255 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:27:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:27:27,731 INFO L93 Difference]: Finished difference Result 105771 states and 130077 transitions. [2022-07-22 20:27:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:27:27,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 84 [2022-07-22 20:27:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:27:27,802 INFO L225 Difference]: With dead ends: 105771 [2022-07-22 20:27:27,803 INFO L226 Difference]: Without dead ends: 45743 [2022-07-22 20:27:27,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:27:27,835 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 4612 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4612 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:27:27,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4612 Valid, 2978 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:27:27,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45743 states. [2022-07-22 20:27:34,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45743 to 45743. [2022-07-22 20:27:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45743 states, 45741 states have (on average 1.220130736101091) internal successors, (55810), 45742 states have internal predecessors, (55810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:27:34,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45743 states to 45743 states and 55810 transitions. [2022-07-22 20:27:34,349 INFO L78 Accepts]: Start accepts. Automaton has 45743 states and 55810 transitions. Word has length 84 [2022-07-22 20:27:34,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:27:34,349 INFO L495 AbstractCegarLoop]: Abstraction has 45743 states and 55810 transitions. [2022-07-22 20:27:34,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:27:34,349 INFO L276 IsEmpty]: Start isEmpty. Operand 45743 states and 55810 transitions. [2022-07-22 20:27:34,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 20:27:34,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:27:34,351 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:27:34,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 20:27:34,351 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:27:34,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:27:34,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1154652827, now seen corresponding path program 1 times [2022-07-22 20:27:34,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:27:34,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339656193] [2022-07-22 20:27:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:34,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:27:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 20:27:34,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:27:34,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339656193] [2022-07-22 20:27:34,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339656193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:27:34,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:27:34,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:27:34,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974377412] [2022-07-22 20:27:34,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:27:34,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:27:34,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:27:34,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:27:34,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:27:34,386 INFO L87 Difference]: Start difference. First operand 45743 states and 55810 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:27:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:27:39,735 INFO L93 Difference]: Finished difference Result 78873 states and 95795 transitions. [2022-07-22 20:27:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:27:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 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 84 [2022-07-22 20:27:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:27:39,785 INFO L225 Difference]: With dead ends: 78873 [2022-07-22 20:27:39,786 INFO L226 Difference]: Without dead ends: 34747 [2022-07-22 20:27:39,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:27:39,809 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 4617 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4617 SdHoareTripleChecker+Valid, 2976 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:27:39,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4617 Valid, 2976 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:27:39,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34747 states. [2022-07-22 20:27:44,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34747 to 34747. [2022-07-22 20:27:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34747 states, 34745 states have (on average 1.2144769031515326) internal successors, (42197), 34746 states have internal predecessors, (42197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:27:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34747 states to 34747 states and 42197 transitions. [2022-07-22 20:27:45,021 INFO L78 Accepts]: Start accepts. Automaton has 34747 states and 42197 transitions. Word has length 84 [2022-07-22 20:27:45,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:27:45,021 INFO L495 AbstractCegarLoop]: Abstraction has 34747 states and 42197 transitions. [2022-07-22 20:27:45,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:27:45,022 INFO L276 IsEmpty]: Start isEmpty. Operand 34747 states and 42197 transitions. [2022-07-22 20:27:45,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 20:27:45,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:27:45,023 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:27:45,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 20:27:45,023 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:27:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:27:45,024 INFO L85 PathProgramCache]: Analyzing trace with hash -125329541, now seen corresponding path program 1 times [2022-07-22 20:27:45,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:27:45,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883212966] [2022-07-22 20:27:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:45,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:27:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 20:27:45,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:27:45,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883212966] [2022-07-22 20:27:45,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883212966] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:27:45,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:27:45,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:27:45,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48070518] [2022-07-22 20:27:45,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:27:45,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:27:45,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:27:45,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:27:45,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:27:45,058 INFO L87 Difference]: Start difference. First operand 34747 states and 42197 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:27:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:27:49,161 INFO L93 Difference]: Finished difference Result 59067 states and 71502 transitions. [2022-07-22 20:27:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:27:49,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 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 84 [2022-07-22 20:27:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:27:49,201 INFO L225 Difference]: With dead ends: 59067 [2022-07-22 20:27:49,201 INFO L226 Difference]: Without dead ends: 25890 [2022-07-22 20:27:49,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:27:49,219 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 4622 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4622 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:27:49,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4622 Valid, 2974 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:27:49,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25890 states. [2022-07-22 20:27:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25890 to 25890. [2022-07-22 20:27:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25890 states, 25888 states have (on average 1.2262438195302843) internal successors, (31745), 25889 states have internal predecessors, (31745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:27:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25890 states to 25890 states and 31745 transitions. [2022-07-22 20:27:53,237 INFO L78 Accepts]: Start accepts. Automaton has 25890 states and 31745 transitions. Word has length 84 [2022-07-22 20:27:53,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:27:53,238 INFO L495 AbstractCegarLoop]: Abstraction has 25890 states and 31745 transitions. [2022-07-22 20:27:53,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:27:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 25890 states and 31745 transitions. [2022-07-22 20:27:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 20:27:53,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:27:53,239 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:27:53,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 20:27:53,239 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:27:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:27:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash -260780419, now seen corresponding path program 1 times [2022-07-22 20:27:53,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:27:53,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562525015] [2022-07-22 20:27:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:53,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:27:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:53,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:27:53,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562525015] [2022-07-22 20:27:53,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562525015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:27:53,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098083636] [2022-07-22 20:27:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:53,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:27:53,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:27:53,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:27:53,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 20:27:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:53,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 20:27:53,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:27:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:57,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:27:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:59,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098083636] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:27:59,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:27:59,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 26, 23] total 56 [2022-07-22 20:27:59,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507586217] [2022-07-22 20:27:59,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:27:59,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-22 20:27:59,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:27:59,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-22 20:27:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=2707, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 20:27:59,702 INFO L87 Difference]: Start difference. First operand 25890 states and 31745 transitions. Second operand has 56 states, 56 states have (on average 4.125) internal successors, (231), 56 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:29:09,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:29:09,176 INFO L93 Difference]: Finished difference Result 106069 states and 124416 transitions. [2022-07-22 20:29:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 348 states. [2022-07-22 20:29:09,177 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.125) internal successors, (231), 56 states have internal predecessors, (231), 0 states have call successors, (0), 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 85 [2022-07-22 20:29:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:29:09,308 INFO L225 Difference]: With dead ends: 106069 [2022-07-22 20:29:09,309 INFO L226 Difference]: Without dead ends: 94574 [2022-07-22 20:29:09,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64384 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=17512, Invalid=128794, Unknown=0, NotChecked=0, Total=146306 [2022-07-22 20:29:09,343 INFO L413 NwaCegarLoop]: 1818 mSDtfsCounter, 29111 mSDsluCounter, 29839 mSDsCounter, 0 mSdLazyCounter, 5315 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29111 SdHoareTripleChecker+Valid, 31657 SdHoareTripleChecker+Invalid, 5886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 5315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:29:09,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29111 Valid, 31657 Invalid, 5886 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [571 Valid, 5315 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-07-22 20:29:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94574 states. [2022-07-22 20:29:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94574 to 37659. [2022-07-22 20:29:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37659 states, 37657 states have (on average 1.216958334439812) internal successors, (45827), 37658 states have internal predecessors, (45827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:29:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37659 states to 37659 states and 45827 transitions. [2022-07-22 20:29:17,725 INFO L78 Accepts]: Start accepts. Automaton has 37659 states and 45827 transitions. Word has length 85 [2022-07-22 20:29:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:29:17,725 INFO L495 AbstractCegarLoop]: Abstraction has 37659 states and 45827 transitions. [2022-07-22 20:29:17,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.125) internal successors, (231), 56 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:29:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 37659 states and 45827 transitions. [2022-07-22 20:29:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 20:29:17,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:29:17,727 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:29:17,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 20:29:17,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 20:29:17,940 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:29:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:29:17,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2123092797, now seen corresponding path program 1 times [2022-07-22 20:29:17,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:29:17,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201533021] [2022-07-22 20:29:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:29:17,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:29:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:29:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:29:18,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:29:18,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201533021] [2022-07-22 20:29:18,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201533021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:29:18,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014165637] [2022-07-22 20:29:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:29:18,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:29:18,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:29:18,560 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:29:18,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 20:29:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:29:18,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 20:29:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:29:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:29:19,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:29:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:29:21,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014165637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:29:21,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:29:21,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16, 15] total 54 [2022-07-22 20:29:21,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713897573] [2022-07-22 20:29:21,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:29:21,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-22 20:29:21,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:29:21,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-22 20:29:21,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2644, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 20:29:21,244 INFO L87 Difference]: Start difference. First operand 37659 states and 45827 transitions. Second operand has 54 states, 54 states have (on average 4.185185185185185) internal successors, (226), 54 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:29:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:29:51,231 INFO L93 Difference]: Finished difference Result 112540 states and 136139 transitions. [2022-07-22 20:29:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-22 20:29:51,232 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.185185185185185) internal successors, (226), 54 states have internal predecessors, (226), 0 states have call successors, (0), 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 85 [2022-07-22 20:29:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:29:51,382 INFO L225 Difference]: With dead ends: 112540 [2022-07-22 20:29:51,383 INFO L226 Difference]: Without dead ends: 101421 [2022-07-22 20:29:51,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3977 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2500, Invalid=15056, Unknown=0, NotChecked=0, Total=17556 [2022-07-22 20:29:51,405 INFO L413 NwaCegarLoop]: 1818 mSDtfsCounter, 22835 mSDsluCounter, 45684 mSDsCounter, 0 mSdLazyCounter, 4151 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22835 SdHoareTripleChecker+Valid, 47502 SdHoareTripleChecker+Invalid, 4376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 4151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:29:51,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22835 Valid, 47502 Invalid, 4376 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [225 Valid, 4151 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 20:29:51,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101421 states.