./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label11.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 63f4b5f458089380e8f0669a95e988a7b7ab051335671065e81323bd858af55a --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 23:51:57,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 23:51:57,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 23:51:57,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 23:51:57,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 23:51:57,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 23:51:57,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 23:51:57,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 23:51:57,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 23:51:57,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 23:51:57,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 23:51:57,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 23:51:57,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 23:51:57,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 23:51:57,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 23:51:57,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 23:51:57,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 23:51:57,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 23:51:57,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 23:51:57,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 23:51:57,891 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 23:51:57,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 23:51:57,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 23:51:57,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 23:51:57,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 23:51:57,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 23:51:57,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 23:51:57,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 23:51:57,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 23:51:57,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 23:51:57,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 23:51:57,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 23:51:57,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 23:51:57,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 23:51:57,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 23:51:57,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 23:51:57,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 23:51:57,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 23:51:57,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 23:51:57,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 23:51:57,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 23:51:57,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 23:51:57,913 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 23:51:57,928 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 23:51:57,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 23:51:57,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 23:51:57,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 23:51:57,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 23:51:57,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 23:51:57,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 23:51:57,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 23:51:57,930 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 23:51:57,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 23:51:57,930 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 23:51:57,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 23:51:57,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 23:51:57,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 23:51:57,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 23:51:57,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 23:51:57,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 23:51:57,931 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 23:51:57,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 23:51:57,932 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 23:51:57,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 23:51:57,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 23:51:57,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 23:51:57,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 23:51:57,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:51:57,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 23:51:57,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 23:51:57,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 23:51:57,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 23:51:57,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 23:51:57,933 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 23:51:57,933 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 23:51:57,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 23:51:57,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63f4b5f458089380e8f0669a95e988a7b7ab051335671065e81323bd858af55a [2022-07-20 23:51:58,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 23:51:58,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 23:51:58,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 23:51:58,181 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 23:51:58,181 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 23:51:58,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label11.c [2022-07-20 23:51:58,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e65ae9449/9077e7eaa7dd4a2fa706344125227f1c/FLAGa6d811efd [2022-07-20 23:51:58,893 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 23:51:58,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label11.c [2022-07-20 23:51:58,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e65ae9449/9077e7eaa7dd4a2fa706344125227f1c/FLAGa6d811efd [2022-07-20 23:51:59,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e65ae9449/9077e7eaa7dd4a2fa706344125227f1c [2022-07-20 23:51:59,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 23:51:59,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 23:51:59,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 23:51:59,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 23:51:59,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 23:51:59,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:51:59" (1/1) ... [2022-07-20 23:51:59,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c34a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:51:59, skipping insertion in model container [2022-07-20 23:51:59,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:51:59" (1/1) ... [2022-07-20 23:51:59,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 23:51:59,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 23:51:59,489 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label11.c[3906,3919] [2022-07-20 23:52:00,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:52:00,115 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 23:52:00,138 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label11.c[3906,3919] [2022-07-20 23:52:00,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:52:00,459 INFO L208 MainTranslator]: Completed translation [2022-07-20 23:52:00,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:00 WrapperNode [2022-07-20 23:52:00,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 23:52:00,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 23:52:00,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 23:52:00,462 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 23:52:00,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:00" (1/1) ... [2022-07-20 23:52:00,524 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:00" (1/1) ... [2022-07-20 23:52:01,029 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-20 23:52:01,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 23:52:01,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 23:52:01,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 23:52:01,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 23:52:01,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:00" (1/1) ... [2022-07-20 23:52:01,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:00" (1/1) ... [2022-07-20 23:52:01,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:00" (1/1) ... [2022-07-20 23:52:01,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:00" (1/1) ... [2022-07-20 23:52:01,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:00" (1/1) ... [2022-07-20 23:52:01,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:00" (1/1) ... [2022-07-20 23:52:01,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:00" (1/1) ... [2022-07-20 23:52:01,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 23:52:01,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 23:52:01,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 23:52:01,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 23:52:01,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:00" (1/1) ... [2022-07-20 23:52:01,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:52:01,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:52:01,524 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) [2022-07-20 23:52:01,542 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 [2022-07-20 23:52:01,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 23:52:01,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 23:52:01,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 23:52:01,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 23:52:01,627 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 23:52:01,629 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 23:52:05,136 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 23:52:05,152 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 23:52:05,153 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 23:52:05,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:52:05 BoogieIcfgContainer [2022-07-20 23:52:05,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 23:52:05,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 23:52:05,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 23:52:05,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 23:52:05,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:51:59" (1/3) ... [2022-07-20 23:52:05,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a5c9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:52:05, skipping insertion in model container [2022-07-20 23:52:05,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:52:00" (2/3) ... [2022-07-20 23:52:05,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a5c9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:52:05, skipping insertion in model container [2022-07-20 23:52:05,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:52:05" (3/3) ... [2022-07-20 23:52:05,163 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label11.c [2022-07-20 23:52:05,173 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 23:52:05,173 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 23:52:05,234 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 23:52:05,238 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@7b8493a9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@340b6aab [2022-07-20 23:52:05,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 23:52:05,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:05,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 23:52:05,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:05,251 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] [2022-07-20 23:52:05,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:05,255 INFO L85 PathProgramCache]: Analyzing trace with hash 678582746, now seen corresponding path program 1 times [2022-07-20 23:52:05,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:05,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536346330] [2022-07-20 23:52:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:05,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:52:05,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:05,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536346330] [2022-07-20 23:52:05,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536346330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:05,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:05,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:52:05,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10035345] [2022-07-20 23:52:05,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:05,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:05,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:05,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:05,467 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:09,424 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2022-07-20 23:52:09,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:09,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2022-07-20 23:52:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:09,462 INFO L225 Difference]: With dead ends: 3160 [2022-07-20 23:52:09,463 INFO L226 Difference]: Without dead ends: 1983 [2022-07-20 23:52:09,470 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 [2022-07-20 23:52:09,475 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 1077 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:09,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-20 23:52:09,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2022-07-20 23:52:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2022-07-20 23:52:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2022-07-20 23:52:09,572 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 26 [2022-07-20 23:52:09,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:09,572 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2022-07-20 23:52:09,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2022-07-20 23:52:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-20 23:52:09,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:09,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:09,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 23:52:09,577 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1189698078, now seen corresponding path program 1 times [2022-07-20 23:52:09,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:09,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905197497] [2022-07-20 23:52:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:09,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:52:09,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:09,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905197497] [2022-07-20 23:52:09,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905197497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:09,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:09,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:52:09,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179643835] [2022-07-20 23:52:09,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:09,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:09,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:09,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:09,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:09,748 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:12,597 INFO L93 Difference]: Finished difference Result 5456 states and 9917 transitions. [2022-07-20 23:52:12,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:12,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-20 23:52:12,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:12,613 INFO L225 Difference]: With dead ends: 5456 [2022-07-20 23:52:12,613 INFO L226 Difference]: Without dead ends: 3528 [2022-07-20 23:52:12,616 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 [2022-07-20 23:52:12,617 INFO L413 NwaCegarLoop]: 855 mSDtfsCounter, 923 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:12,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:52:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2022-07-20 23:52:12,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3526. [2022-07-20 23:52:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.5670921985815602) internal successors, (5524), 3525 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:12,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5524 transitions. [2022-07-20 23:52:12,667 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5524 transitions. Word has length 91 [2022-07-20 23:52:12,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:12,668 INFO L495 AbstractCegarLoop]: Abstraction has 3526 states and 5524 transitions. [2022-07-20 23:52:12,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:12,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5524 transitions. [2022-07-20 23:52:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-20 23:52:12,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:12,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:12,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 23:52:12,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:12,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1002704179, now seen corresponding path program 1 times [2022-07-20 23:52:12,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:12,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709194969] [2022-07-20 23:52:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:12,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:52:12,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:12,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709194969] [2022-07-20 23:52:12,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709194969] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:12,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:12,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:52:12,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534337160] [2022-07-20 23:52:12,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:12,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:12,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:12,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:12,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:12,724 INFO L87 Difference]: Start difference. First operand 3526 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:15,508 INFO L93 Difference]: Finished difference Result 10232 states and 16097 transitions. [2022-07-20 23:52:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:15,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2022-07-20 23:52:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:15,528 INFO L225 Difference]: With dead ends: 10232 [2022-07-20 23:52:15,528 INFO L226 Difference]: Without dead ends: 6708 [2022-07-20 23:52:15,535 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 [2022-07-20 23:52:15,536 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 972 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:15,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 850 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:52:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6708 states. [2022-07-20 23:52:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6708 to 6700. [2022-07-20 23:52:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6700 states, 6699 states have (on average 1.413046723391551) internal successors, (9466), 6699 states have internal predecessors, (9466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:15,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 9466 transitions. [2022-07-20 23:52:15,673 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 9466 transitions. Word has length 97 [2022-07-20 23:52:15,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:15,675 INFO L495 AbstractCegarLoop]: Abstraction has 6700 states and 9466 transitions. [2022-07-20 23:52:15,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 9466 transitions. [2022-07-20 23:52:15,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-20 23:52:15,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:15,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:15,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 23:52:15,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:15,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1727159864, now seen corresponding path program 1 times [2022-07-20 23:52:15,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:15,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027015815] [2022-07-20 23:52:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:15,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:52:15,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:15,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027015815] [2022-07-20 23:52:15,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027015815] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:15,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:15,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:52:15,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238356030] [2022-07-20 23:52:15,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:15,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:15,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:15,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:15,791 INFO L87 Difference]: Start difference. First operand 6700 states and 9466 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:18,955 INFO L93 Difference]: Finished difference Result 17443 states and 24479 transitions. [2022-07-20 23:52:18,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:18,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-07-20 23:52:18,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:18,985 INFO L225 Difference]: With dead ends: 17443 [2022-07-20 23:52:18,985 INFO L226 Difference]: Without dead ends: 10745 [2022-07-20 23:52:18,993 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 [2022-07-20 23:52:18,994 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 844 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3291 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 3291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:18,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 965 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 3291 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-20 23:52:19,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10745 states. [2022-07-20 23:52:19,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10745 to 10669. [2022-07-20 23:52:19,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3562992125984252) internal successors, (14469), 10668 states have internal predecessors, (14469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14469 transitions. [2022-07-20 23:52:19,145 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14469 transitions. Word has length 127 [2022-07-20 23:52:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:19,146 INFO L495 AbstractCegarLoop]: Abstraction has 10669 states and 14469 transitions. [2022-07-20 23:52:19,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14469 transitions. [2022-07-20 23:52:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-20 23:52:19,149 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:19,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:19,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 23:52:19,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:19,152 INFO L85 PathProgramCache]: Analyzing trace with hash -775349553, now seen corresponding path program 1 times [2022-07-20 23:52:19,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:19,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312849473] [2022-07-20 23:52:19,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:19,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:52:19,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:19,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312849473] [2022-07-20 23:52:19,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312849473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:19,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:19,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:52:19,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034631964] [2022-07-20 23:52:19,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:19,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:19,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:19,248 INFO L87 Difference]: Start difference. First operand 10669 states and 14469 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:21,836 INFO L93 Difference]: Finished difference Result 20549 states and 28119 transitions. [2022-07-20 23:52:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:21,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2022-07-20 23:52:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:21,858 INFO L225 Difference]: With dead ends: 20549 [2022-07-20 23:52:21,858 INFO L226 Difference]: Without dead ends: 10669 [2022-07-20 23:52:21,866 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 [2022-07-20 23:52:21,866 INFO L413 NwaCegarLoop]: 1083 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:21,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1212 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:52:21,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10669 states. [2022-07-20 23:52:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10669 to 10669. [2022-07-20 23:52:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3539557555305586) internal successors, (14444), 10668 states have internal predecessors, (14444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14444 transitions. [2022-07-20 23:52:22,008 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14444 transitions. Word has length 137 [2022-07-20 23:52:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:22,008 INFO L495 AbstractCegarLoop]: Abstraction has 10669 states and 14444 transitions. [2022-07-20 23:52:22,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14444 transitions. [2022-07-20 23:52:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-20 23:52:22,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:22,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:22,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 23:52:22,011 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:22,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:22,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2076503771, now seen corresponding path program 1 times [2022-07-20 23:52:22,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:22,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500189392] [2022-07-20 23:52:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:22,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 23:52:22,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:22,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500189392] [2022-07-20 23:52:22,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500189392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:22,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:22,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:52:22,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809633602] [2022-07-20 23:52:22,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:22,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:22,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:22,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:22,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:22,083 INFO L87 Difference]: Start difference. First operand 10669 states and 14444 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:24,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:24,931 INFO L93 Difference]: Finished difference Result 30031 states and 41217 transitions. [2022-07-20 23:52:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:24,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 151 [2022-07-20 23:52:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:24,964 INFO L225 Difference]: With dead ends: 30031 [2022-07-20 23:52:24,964 INFO L226 Difference]: Without dead ends: 20151 [2022-07-20 23:52:24,977 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 [2022-07-20 23:52:24,977 INFO L413 NwaCegarLoop]: 1071 mSDtfsCounter, 736 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2527 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 2527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:24,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1221 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 2527 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:52:24,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2022-07-20 23:52:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 19337. [2022-07-20 23:52:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19337 states, 19336 states have (on average 1.24244931733554) internal successors, (24024), 19336 states have internal predecessors, (24024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19337 states to 19337 states and 24024 transitions. [2022-07-20 23:52:25,194 INFO L78 Accepts]: Start accepts. Automaton has 19337 states and 24024 transitions. Word has length 151 [2022-07-20 23:52:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:25,194 INFO L495 AbstractCegarLoop]: Abstraction has 19337 states and 24024 transitions. [2022-07-20 23:52:25,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 19337 states and 24024 transitions. [2022-07-20 23:52:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-07-20 23:52:25,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:25,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:25,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 23:52:25,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:25,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:25,198 INFO L85 PathProgramCache]: Analyzing trace with hash -581878337, now seen corresponding path program 1 times [2022-07-20 23:52:25,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:25,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156078671] [2022-07-20 23:52:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:25,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-20 23:52:25,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:25,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156078671] [2022-07-20 23:52:25,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156078671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:25,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:25,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:52:25,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319384656] [2022-07-20 23:52:25,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:25,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:25,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:25,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:25,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:25,330 INFO L87 Difference]: Start difference. First operand 19337 states and 24024 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:28,169 INFO L93 Difference]: Finished difference Result 44989 states and 55628 transitions. [2022-07-20 23:52:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:28,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 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 238 [2022-07-20 23:52:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:28,211 INFO L225 Difference]: With dead ends: 44989 [2022-07-20 23:52:28,212 INFO L226 Difference]: Without dead ends: 26441 [2022-07-20 23:52:28,227 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 [2022-07-20 23:52:28,228 INFO L413 NwaCegarLoop]: 1029 mSDtfsCounter, 728 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:28,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1213 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:52:28,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26441 states. [2022-07-20 23:52:28,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26441 to 26434. [2022-07-20 23:52:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26434 states, 26433 states have (on average 1.200582605076987) internal successors, (31735), 26433 states have internal predecessors, (31735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26434 states to 26434 states and 31735 transitions. [2022-07-20 23:52:28,500 INFO L78 Accepts]: Start accepts. Automaton has 26434 states and 31735 transitions. Word has length 238 [2022-07-20 23:52:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:28,501 INFO L495 AbstractCegarLoop]: Abstraction has 26434 states and 31735 transitions. [2022-07-20 23:52:28,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:28,501 INFO L276 IsEmpty]: Start isEmpty. Operand 26434 states and 31735 transitions. [2022-07-20 23:52:28,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-07-20 23:52:28,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:28,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:28,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 23:52:28,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:28,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1834844219, now seen corresponding path program 1 times [2022-07-20 23:52:28,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:28,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636733465] [2022-07-20 23:52:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:28,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:52:28,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:28,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636733465] [2022-07-20 23:52:28,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636733465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:28,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:28,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:52:28,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194607309] [2022-07-20 23:52:28,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:28,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:28,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:28,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:28,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:28,586 INFO L87 Difference]: Start difference. First operand 26434 states and 31735 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:31,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:31,467 INFO L93 Difference]: Finished difference Result 72535 states and 87971 transitions. [2022-07-20 23:52:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:31,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 240 [2022-07-20 23:52:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:31,521 INFO L225 Difference]: With dead ends: 72535 [2022-07-20 23:52:31,521 INFO L226 Difference]: Without dead ends: 46103 [2022-07-20 23:52:31,546 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 [2022-07-20 23:52:31,547 INFO L413 NwaCegarLoop]: 1848 mSDtfsCounter, 841 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:31,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 1984 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 23:52:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46103 states. [2022-07-20 23:52:31,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46103 to 43733. [2022-07-20 23:52:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43733 states, 43732 states have (on average 1.1691210097868838) internal successors, (51128), 43732 states have internal predecessors, (51128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43733 states to 43733 states and 51128 transitions. [2022-07-20 23:52:32,063 INFO L78 Accepts]: Start accepts. Automaton has 43733 states and 51128 transitions. Word has length 240 [2022-07-20 23:52:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:32,064 INFO L495 AbstractCegarLoop]: Abstraction has 43733 states and 51128 transitions. [2022-07-20 23:52:32,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:32,064 INFO L276 IsEmpty]: Start isEmpty. Operand 43733 states and 51128 transitions. [2022-07-20 23:52:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-20 23:52:32,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:32,067 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:32,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 23:52:32,067 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:32,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1777805807, now seen corresponding path program 1 times [2022-07-20 23:52:32,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:32,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752989842] [2022-07-20 23:52:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:32,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:52:32,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:32,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752989842] [2022-07-20 23:52:32,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752989842] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:32,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:32,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:52:32,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204932406] [2022-07-20 23:52:32,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:32,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:32,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:32,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:32,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:32,151 INFO L87 Difference]: Start difference. First operand 43733 states and 51128 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:35,173 INFO L93 Difference]: Finished difference Result 106364 states and 126458 transitions. [2022-07-20 23:52:35,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:35,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-07-20 23:52:35,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:35,248 INFO L225 Difference]: With dead ends: 106364 [2022-07-20 23:52:35,249 INFO L226 Difference]: Without dead ends: 63420 [2022-07-20 23:52:35,281 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 [2022-07-20 23:52:35,282 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 823 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:35,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 930 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [900 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 23:52:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63420 states. [2022-07-20 23:52:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63420 to 61048. [2022-07-20 23:52:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61048 states, 61047 states have (on average 1.1609579504316347) internal successors, (70873), 61047 states have internal predecessors, (70873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:36,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61048 states to 61048 states and 70873 transitions. [2022-07-20 23:52:36,308 INFO L78 Accepts]: Start accepts. Automaton has 61048 states and 70873 transitions. Word has length 253 [2022-07-20 23:52:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:36,311 INFO L495 AbstractCegarLoop]: Abstraction has 61048 states and 70873 transitions. [2022-07-20 23:52:36,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 61048 states and 70873 transitions. [2022-07-20 23:52:36,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-07-20 23:52:36,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:36,315 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:36,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 23:52:36,315 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:36,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:36,316 INFO L85 PathProgramCache]: Analyzing trace with hash 796596, now seen corresponding path program 1 times [2022-07-20 23:52:36,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:36,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483677255] [2022-07-20 23:52:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:36,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 23:52:36,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:36,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483677255] [2022-07-20 23:52:36,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483677255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:36,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:36,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:52:36,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346583770] [2022-07-20 23:52:36,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:36,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:52:36,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:52:36,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:52:36,415 INFO L87 Difference]: Start difference. First operand 61048 states and 70873 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:42,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:42,642 INFO L93 Difference]: Finished difference Result 160082 states and 186750 transitions. [2022-07-20 23:52:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:52:42,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 314 [2022-07-20 23:52:42,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:42,761 INFO L225 Difference]: With dead ends: 160082 [2022-07-20 23:52:42,761 INFO L226 Difference]: Without dead ends: 99823 [2022-07-20 23:52:42,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:52:42,794 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 1701 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6252 mSolverCounterSat, 996 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 7248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 996 IncrementalHoareTripleChecker+Valid, 6252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:42,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1701 Valid, 1057 Invalid, 7248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [996 Valid, 6252 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-07-20 23:52:42,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99823 states. [2022-07-20 23:52:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99823 to 76803. [2022-07-20 23:52:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76803 states, 76802 states have (on average 1.1463763964480091) internal successors, (88044), 76802 states have internal predecessors, (88044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76803 states to 76803 states and 88044 transitions. [2022-07-20 23:52:43,682 INFO L78 Accepts]: Start accepts. Automaton has 76803 states and 88044 transitions. Word has length 314 [2022-07-20 23:52:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:43,683 INFO L495 AbstractCegarLoop]: Abstraction has 76803 states and 88044 transitions. [2022-07-20 23:52:43,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 76803 states and 88044 transitions. [2022-07-20 23:52:43,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-07-20 23:52:43,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:43,687 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:43,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 23:52:43,688 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1476485299, now seen corresponding path program 1 times [2022-07-20 23:52:43,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:43,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780132655] [2022-07-20 23:52:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:43,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 113 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 23:52:44,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:44,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780132655] [2022-07-20 23:52:44,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780132655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:52:44,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405588589] [2022-07-20 23:52:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:44,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:52:44,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:52:44,158 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) [2022-07-20 23:52:44,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 23:52:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:52:44,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:52:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-20 23:52:44,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:52:44,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405588589] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:44,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:52:44,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-20 23:52:44,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815048569] [2022-07-20 23:52:44,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:44,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:44,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:44,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:52:44,389 INFO L87 Difference]: Start difference. First operand 76803 states and 88044 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:47,339 INFO L93 Difference]: Finished difference Result 152806 states and 175284 transitions. [2022-07-20 23:52:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:47,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 332 [2022-07-20 23:52:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:47,433 INFO L225 Difference]: With dead ends: 152806 [2022-07-20 23:52:47,433 INFO L226 Difference]: Without dead ends: 76792 [2022-07-20 23:52:47,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:52:47,474 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 1073 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:47,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 814 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 2388 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:52:47,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76792 states. [2022-07-20 23:52:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76792 to 76789. [2022-07-20 23:52:48,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76789 states, 76788 states have (on average 1.1087149033703183) internal successors, (85136), 76788 states have internal predecessors, (85136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:48,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76789 states to 76789 states and 85136 transitions. [2022-07-20 23:52:48,392 INFO L78 Accepts]: Start accepts. Automaton has 76789 states and 85136 transitions. Word has length 332 [2022-07-20 23:52:48,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:48,392 INFO L495 AbstractCegarLoop]: Abstraction has 76789 states and 85136 transitions. [2022-07-20 23:52:48,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:48,393 INFO L276 IsEmpty]: Start isEmpty. Operand 76789 states and 85136 transitions. [2022-07-20 23:52:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-07-20 23:52:48,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:48,398 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:48,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 23:52:48,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-20 23:52:48,618 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:48,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:48,618 INFO L85 PathProgramCache]: Analyzing trace with hash -904685255, now seen corresponding path program 1 times [2022-07-20 23:52:48,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:48,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418641753] [2022-07-20 23:52:48,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:48,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 270 proven. 113 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 23:52:48,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:48,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418641753] [2022-07-20 23:52:48,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418641753] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:52:48,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807678701] [2022-07-20 23:52:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:48,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:52:48,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:52:48,904 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) [2022-07-20 23:52:48,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 23:52:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:49,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:52:49,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:52:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-20 23:52:49,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:52:49,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807678701] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:49,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:52:49,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-20 23:52:49,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861477260] [2022-07-20 23:52:49,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:49,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:49,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:49,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:49,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:52:49,150 INFO L87 Difference]: Start difference. First operand 76789 states and 85136 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:52,120 INFO L93 Difference]: Finished difference Result 152787 states and 169477 transitions. [2022-07-20 23:52:52,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:52,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 381 [2022-07-20 23:52:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:52,216 INFO L225 Difference]: With dead ends: 152787 [2022-07-20 23:52:52,216 INFO L226 Difference]: Without dead ends: 76787 [2022-07-20 23:52:52,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:52:52,254 INFO L413 NwaCegarLoop]: 1343 mSDtfsCounter, 1084 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:52,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 1422 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:52:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76787 states. [2022-07-20 23:52:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76787 to 76786. [2022-07-20 23:52:52,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76786 states, 76785 states have (on average 1.0866184801719085) internal successors, (83436), 76785 states have internal predecessors, (83436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76786 states to 76786 states and 83436 transitions. [2022-07-20 23:52:53,050 INFO L78 Accepts]: Start accepts. Automaton has 76786 states and 83436 transitions. Word has length 381 [2022-07-20 23:52:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:53,051 INFO L495 AbstractCegarLoop]: Abstraction has 76786 states and 83436 transitions. [2022-07-20 23:52:53,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:53,051 INFO L276 IsEmpty]: Start isEmpty. Operand 76786 states and 83436 transitions. [2022-07-20 23:52:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-07-20 23:52:53,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:53,055 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:53,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 23:52:53,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 23:52:53,273 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash 191330175, now seen corresponding path program 1 times [2022-07-20 23:52:53,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:53,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613953258] [2022-07-20 23:52:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:53,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 424 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-20 23:52:53,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:53,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613953258] [2022-07-20 23:52:53,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613953258] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:53,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:52:53,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:52:53,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166983489] [2022-07-20 23:52:53,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:53,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:53,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:53,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:53,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:52:53,385 INFO L87 Difference]: Start difference. First operand 76786 states and 83436 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:52:56,992 INFO L93 Difference]: Finished difference Result 177191 states and 193904 transitions. [2022-07-20 23:52:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:52:56,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 382 [2022-07-20 23:52:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:52:57,123 INFO L225 Difference]: With dead ends: 177191 [2022-07-20 23:52:57,123 INFO L226 Difference]: Without dead ends: 101194 [2022-07-20 23:52:57,173 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 [2022-07-20 23:52:57,175 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 888 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 3350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:52:57,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 895 Invalid, 3350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 2418 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:52:57,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101194 states. [2022-07-20 23:52:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101194 to 99602. [2022-07-20 23:52:58,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99602 states, 99601 states have (on average 1.0899087358560657) internal successors, (108556), 99601 states have internal predecessors, (108556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99602 states to 99602 states and 108556 transitions. [2022-07-20 23:52:58,515 INFO L78 Accepts]: Start accepts. Automaton has 99602 states and 108556 transitions. Word has length 382 [2022-07-20 23:52:58,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:52:58,515 INFO L495 AbstractCegarLoop]: Abstraction has 99602 states and 108556 transitions. [2022-07-20 23:52:58,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:52:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 99602 states and 108556 transitions. [2022-07-20 23:52:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-07-20 23:52:58,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:52:58,524 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:52:58,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 23:52:58,524 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:52:58,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:52:58,525 INFO L85 PathProgramCache]: Analyzing trace with hash 348171354, now seen corresponding path program 1 times [2022-07-20 23:52:58,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:52:58,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426318647] [2022-07-20 23:52:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:58,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:52:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 285 proven. 113 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 23:52:58,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:52:58,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426318647] [2022-07-20 23:52:58,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426318647] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:52:58,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238238032] [2022-07-20 23:52:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:52:58,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:52:58,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:52:58,791 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) [2022-07-20 23:52:58,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 23:52:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:52:58,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:52:58,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:52:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 309 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-20 23:52:59,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:52:59,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238238032] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:52:59,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:52:59,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-20 23:52:59,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735352089] [2022-07-20 23:52:59,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:52:59,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:52:59,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:52:59,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:52:59,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:52:59,091 INFO L87 Difference]: Start difference. First operand 99602 states and 108556 transitions. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:53:02,308 INFO L93 Difference]: Finished difference Result 195242 states and 214131 transitions. [2022-07-20 23:53:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:53:02,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 456 [2022-07-20 23:53:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:53:02,451 INFO L225 Difference]: With dead ends: 195242 [2022-07-20 23:53:02,451 INFO L226 Difference]: Without dead ends: 111390 [2022-07-20 23:53:02,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:53:02,479 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 1133 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 3107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 846 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:53:02,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 396 Invalid, 3107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [846 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:53:02,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111390 states. [2022-07-20 23:53:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111390 to 111390. [2022-07-20 23:53:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111390 states, 111389 states have (on average 1.0825575236333929) internal successors, (120585), 111389 states have internal predecessors, (120585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111390 states to 111390 states and 120585 transitions. [2022-07-20 23:53:03,735 INFO L78 Accepts]: Start accepts. Automaton has 111390 states and 120585 transitions. Word has length 456 [2022-07-20 23:53:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:53:03,735 INFO L495 AbstractCegarLoop]: Abstraction has 111390 states and 120585 transitions. [2022-07-20 23:53:03,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 111390 states and 120585 transitions. [2022-07-20 23:53:03,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-07-20 23:53:03,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:53:03,752 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:53:03,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 23:53:03,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:53:03,953 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:53:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:53:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash 443995640, now seen corresponding path program 1 times [2022-07-20 23:53:03,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:53:03,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966746482] [2022-07-20 23:53:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:53:03,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:53:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:53:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-20 23:53:04,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:53:04,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966746482] [2022-07-20 23:53:04,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966746482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:53:04,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:53:04,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:53:04,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666915192] [2022-07-20 23:53:04,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:53:04,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:53:04,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:53:04,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:53:04,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:53:04,107 INFO L87 Difference]: Start difference. First operand 111390 states and 120585 transitions. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:07,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:53:07,810 INFO L93 Difference]: Finished difference Result 245599 states and 266947 transitions. [2022-07-20 23:53:07,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:53:07,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 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 474 [2022-07-20 23:53:07,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:53:07,975 INFO L225 Difference]: With dead ends: 245599 [2022-07-20 23:53:07,975 INFO L226 Difference]: Without dead ends: 134211 [2022-07-20 23:53:08,029 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 [2022-07-20 23:53:08,030 INFO L413 NwaCegarLoop]: 1709 mSDtfsCounter, 728 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1844 SdHoareTripleChecker+Invalid, 3165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:53:08,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1844 Invalid, 3165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-20 23:53:08,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134211 states. [2022-07-20 23:53:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134211 to 134198. [2022-07-20 23:53:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134198 states, 134197 states have (on average 1.0705529929879207) internal successors, (143665), 134197 states have internal predecessors, (143665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134198 states to 134198 states and 143665 transitions. [2022-07-20 23:53:09,835 INFO L78 Accepts]: Start accepts. Automaton has 134198 states and 143665 transitions. Word has length 474 [2022-07-20 23:53:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:53:09,836 INFO L495 AbstractCegarLoop]: Abstraction has 134198 states and 143665 transitions. [2022-07-20 23:53:09,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:09,836 INFO L276 IsEmpty]: Start isEmpty. Operand 134198 states and 143665 transitions. [2022-07-20 23:53:09,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-07-20 23:53:09,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:53:09,847 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:53:09,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 23:53:09,847 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:53:09,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:53:09,847 INFO L85 PathProgramCache]: Analyzing trace with hash 649832757, now seen corresponding path program 1 times [2022-07-20 23:53:09,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:53:09,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996596522] [2022-07-20 23:53:09,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:53:09,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:53:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:53:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2022-07-20 23:53:09,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:53:09,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996596522] [2022-07-20 23:53:09,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996596522] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:53:09,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:53:09,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:53:09,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929228755] [2022-07-20 23:53:09,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:53:09,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:53:09,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:53:09,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:53:09,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:53:09,991 INFO L87 Difference]: Start difference. First operand 134198 states and 143665 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:53:12,117 INFO L93 Difference]: Finished difference Result 248696 states and 266866 transitions. [2022-07-20 23:53:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:53:12,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 511 [2022-07-20 23:53:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:53:12,263 INFO L225 Difference]: With dead ends: 248696 [2022-07-20 23:53:12,263 INFO L226 Difference]: Without dead ends: 133395 [2022-07-20 23:53:12,316 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 [2022-07-20 23:53:12,317 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 1614 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1614 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:53:12,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1614 Valid, 280 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 23:53:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133395 states. [2022-07-20 23:53:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133395 to 133394. [2022-07-20 23:53:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133394 states, 133393 states have (on average 1.0695688679316007) internal successors, (142673), 133393 states have internal predecessors, (142673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133394 states to 133394 states and 142673 transitions. [2022-07-20 23:53:13,929 INFO L78 Accepts]: Start accepts. Automaton has 133394 states and 142673 transitions. Word has length 511 [2022-07-20 23:53:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:53:13,930 INFO L495 AbstractCegarLoop]: Abstraction has 133394 states and 142673 transitions. [2022-07-20 23:53:13,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 133394 states and 142673 transitions. [2022-07-20 23:53:13,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2022-07-20 23:53:13,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:53:13,942 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:53:13,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 23:53:13,943 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:53:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:53:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1942642485, now seen corresponding path program 1 times [2022-07-20 23:53:13,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:53:13,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243899083] [2022-07-20 23:53:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:53:13,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:53:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:53:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-20 23:53:14,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:53:14,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243899083] [2022-07-20 23:53:14,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243899083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:53:14,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:53:14,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:53:14,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081854053] [2022-07-20 23:53:14,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:53:14,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:53:14,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:53:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:53:14,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:53:14,110 INFO L87 Difference]: Start difference. First operand 133394 states and 142673 transitions. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:17,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:53:17,360 INFO L93 Difference]: Finished difference Result 248682 states and 266691 transitions. [2022-07-20 23:53:17,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:53:17,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 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 525 [2022-07-20 23:53:17,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:53:17,500 INFO L225 Difference]: With dead ends: 248682 [2022-07-20 23:53:17,501 INFO L226 Difference]: Without dead ends: 134185 [2022-07-20 23:53:17,537 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 [2022-07-20 23:53:17,537 INFO L413 NwaCegarLoop]: 1767 mSDtfsCounter, 609 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 2498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:53:17,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1892 Invalid, 2498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2484 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:53:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134185 states. [2022-07-20 23:53:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134185 to 134181. [2022-07-20 23:53:18,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134181 states, 134180 states have (on average 1.069384409002832) internal successors, (143490), 134180 states have internal predecessors, (143490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134181 states to 134181 states and 143490 transitions. [2022-07-20 23:53:19,040 INFO L78 Accepts]: Start accepts. Automaton has 134181 states and 143490 transitions. Word has length 525 [2022-07-20 23:53:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:53:19,040 INFO L495 AbstractCegarLoop]: Abstraction has 134181 states and 143490 transitions. [2022-07-20 23:53:19,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 134181 states and 143490 transitions. [2022-07-20 23:53:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2022-07-20 23:53:19,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:53:19,061 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:53:19,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 23:53:19,061 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:53:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:53:19,062 INFO L85 PathProgramCache]: Analyzing trace with hash 69110433, now seen corresponding path program 1 times [2022-07-20 23:53:19,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:53:19,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930577943] [2022-07-20 23:53:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:53:19,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:53:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:53:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 526 proven. 110 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-07-20 23:53:19,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:53:19,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930577943] [2022-07-20 23:53:19,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930577943] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:53:19,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804127780] [2022-07-20 23:53:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:53:19,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:53:19,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:53:19,268 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) [2022-07-20 23:53:19,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 23:53:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:53:19,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 23:53:19,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:53:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 523 proven. 0 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-07-20 23:53:19,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:53:19,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804127780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:53:19,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:53:19,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-20 23:53:19,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434511891] [2022-07-20 23:53:19,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:53:19,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:53:19,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:53:19,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:53:19,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 23:53:19,472 INFO L87 Difference]: Start difference. First operand 134181 states and 143490 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:53:23,629 INFO L93 Difference]: Finished difference Result 298254 states and 320099 transitions. [2022-07-20 23:53:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:53:23,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 585 [2022-07-20 23:53:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:53:23,838 INFO L225 Difference]: With dead ends: 298254 [2022-07-20 23:53:23,838 INFO L226 Difference]: Without dead ends: 180607 [2022-07-20 23:53:23,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 23:53:23,881 INFO L413 NwaCegarLoop]: 1602 mSDtfsCounter, 906 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2528 mSolverCounterSat, 715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 3243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 715 IncrementalHoareTripleChecker+Valid, 2528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:53:23,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 1709 Invalid, 3243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [715 Valid, 2528 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:53:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180607 states. [2022-07-20 23:53:25,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180607 to 164862. [2022-07-20 23:53:25,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164862 states, 164861 states have (on average 1.061172745525018) internal successors, (174946), 164861 states have internal predecessors, (174946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164862 states to 164862 states and 174946 transitions. [2022-07-20 23:53:25,868 INFO L78 Accepts]: Start accepts. Automaton has 164862 states and 174946 transitions. Word has length 585 [2022-07-20 23:53:25,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:53:25,869 INFO L495 AbstractCegarLoop]: Abstraction has 164862 states and 174946 transitions. [2022-07-20 23:53:25,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:25,869 INFO L276 IsEmpty]: Start isEmpty. Operand 164862 states and 174946 transitions. [2022-07-20 23:53:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2022-07-20 23:53:25,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:53:25,886 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:53:25,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-20 23:53:26,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 23:53:26,088 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:53:26,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:53:26,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1211656569, now seen corresponding path program 1 times [2022-07-20 23:53:26,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:53:26,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739902573] [2022-07-20 23:53:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:53:26,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:53:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:53:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 359 proven. 110 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 23:53:26,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:53:26,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739902573] [2022-07-20 23:53:26,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739902573] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:53:26,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236363883] [2022-07-20 23:53:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:53:26,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:53:26,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:53:26,365 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) [2022-07-20 23:53:26,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 23:53:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:53:26,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:53:26,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:53:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-07-20 23:53:26,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:53:26,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236363883] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:53:26,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:53:26,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-07-20 23:53:26,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543735473] [2022-07-20 23:53:26,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:53:26,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:53:26,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:53:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:53:26,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:53:26,732 INFO L87 Difference]: Start difference. First operand 164862 states and 174946 transitions. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:53:30,611 INFO L93 Difference]: Finished difference Result 328149 states and 348282 transitions. [2022-07-20 23:53:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:53:30,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 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 587 [2022-07-20 23:53:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:53:30,822 INFO L225 Difference]: With dead ends: 328149 [2022-07-20 23:53:30,823 INFO L226 Difference]: Without dead ends: 164076 [2022-07-20 23:53:30,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-20 23:53:30,888 INFO L413 NwaCegarLoop]: 1656 mSDtfsCounter, 692 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2433 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 2433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:53:30,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 1781 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 2433 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:53:31,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164076 states. [2022-07-20 23:53:32,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164076 to 160134. [2022-07-20 23:53:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160134 states, 160133 states have (on average 1.047660382307207) internal successors, (167765), 160133 states have internal predecessors, (167765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160134 states to 160134 states and 167765 transitions. [2022-07-20 23:53:32,906 INFO L78 Accepts]: Start accepts. Automaton has 160134 states and 167765 transitions. Word has length 587 [2022-07-20 23:53:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:53:32,906 INFO L495 AbstractCegarLoop]: Abstraction has 160134 states and 167765 transitions. [2022-07-20 23:53:32,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 160134 states and 167765 transitions. [2022-07-20 23:53:32,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2022-07-20 23:53:32,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:53:32,927 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:53:32,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 23:53:33,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:53:33,128 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:53:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:53:33,128 INFO L85 PathProgramCache]: Analyzing trace with hash -909578388, now seen corresponding path program 1 times [2022-07-20 23:53:33,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:53:33,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995310838] [2022-07-20 23:53:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:53:33,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:53:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:53:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 794 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-20 23:53:33,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:53:33,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995310838] [2022-07-20 23:53:33,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995310838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:53:33,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:53:33,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 23:53:33,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902073818] [2022-07-20 23:53:33,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:53:33,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:53:33,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:53:33,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:53:33,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:53:33,392 INFO L87 Difference]: Start difference. First operand 160134 states and 167765 transitions. Second operand has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)