./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label26.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label26.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 d21e74f8974e22fefe5d2a2f720c109d2a535f54b9e443011df3f86444f64325 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:41:19,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:41:19,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:41:19,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:41:19,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:41:19,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:41:19,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:41:19,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:41:19,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:41:19,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:41:19,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:41:19,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:41:19,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:41:19,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:41:19,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:41:19,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:41:19,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:41:19,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:41:19,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:41:19,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:41:19,147 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:41:19,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:41:19,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:41:19,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:41:19,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:41:19,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:41:19,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:41:19,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:41:19,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:41:19,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:41:19,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:41:19,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:41:19,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:41:19,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:41:19,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:41:19,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:41:19,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:41:19,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:41:19,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:41:19,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:41:19,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:41:19,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:41:19,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:41:19,202 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:41:19,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:41:19,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:41:19,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:41:19,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:41:19,204 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:41:19,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:41:19,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:41:19,205 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:41:19,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:41:19,206 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:41:19,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:41:19,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:41:19,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:41:19,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:41:19,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:41:19,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:41:19,208 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:41:19,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:41:19,208 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:41:19,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:41:19,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:41:19,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:41:19,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:41:19,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:41:19,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:41:19,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:41:19,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:41:19,211 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:41:19,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:41:19,212 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:41:19,212 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:41:19,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:41:19,212 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d21e74f8974e22fefe5d2a2f720c109d2a535f54b9e443011df3f86444f64325 [2022-07-19 12:41:19,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:41:19,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:41:19,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:41:19,522 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:41:19,523 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:41:19,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label26.c [2022-07-19 12:41:19,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe1a2e0bf/12535fb1f66441c38cc835c0250cd3b4/FLAG5ec32ae30 [2022-07-19 12:41:20,198 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:41:20,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label26.c [2022-07-19 12:41:20,224 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe1a2e0bf/12535fb1f66441c38cc835c0250cd3b4/FLAG5ec32ae30 [2022-07-19 12:41:20,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe1a2e0bf/12535fb1f66441c38cc835c0250cd3b4 [2022-07-19 12:41:20,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:41:20,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:41:20,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:41:20,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:41:20,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:41:20,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:41:20" (1/1) ... [2022-07-19 12:41:20,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488274b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:41:20, skipping insertion in model container [2022-07-19 12:41:20,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:41:20" (1/1) ... [2022-07-19 12:41:20,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:41:20,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:41:20,722 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label26.c[4393,4406] [2022-07-19 12:41:21,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:41:21,240 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:41:21,258 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label26.c[4393,4406] [2022-07-19 12:41:21,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:41:21,638 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:41:21,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:41:21 WrapperNode [2022-07-19 12:41:21,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:41:21,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:41:21,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:41:21,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:41:21,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:41:21" (1/1) ... [2022-07-19 12:41:21,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:41:21" (1/1) ... [2022-07-19 12:41:21,942 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-19 12:41:21,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:41:21,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:41:21,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:41:21,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:41:21,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:41:21" (1/1) ... [2022-07-19 12:41:21,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:41:21" (1/1) ... [2022-07-19 12:41:22,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:41:21" (1/1) ... [2022-07-19 12:41:22,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:41:21" (1/1) ... [2022-07-19 12:41:22,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:41:21" (1/1) ... [2022-07-19 12:41:22,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:41:21" (1/1) ... [2022-07-19 12:41:22,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:41:21" (1/1) ... [2022-07-19 12:41:22,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:41:22,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:41:22,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:41:22,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:41:22,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:41:21" (1/1) ... [2022-07-19 12:41:22,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:41:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:41:22,383 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) [2022-07-19 12:41:22,436 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 [2022-07-19 12:41:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:41:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:41:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:41:22,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:41:22,551 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:41:22,553 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:41:25,506 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:41:25,519 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:41:25,520 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:41:25,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:41:25 BoogieIcfgContainer [2022-07-19 12:41:25,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:41:25,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:41:25,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:41:25,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:41:25,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:41:20" (1/3) ... [2022-07-19 12:41:25,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2831a98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:41:25, skipping insertion in model container [2022-07-19 12:41:25,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:41:21" (2/3) ... [2022-07-19 12:41:25,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2831a98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:41:25, skipping insertion in model container [2022-07-19 12:41:25,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:41:25" (3/3) ... [2022-07-19 12:41:25,531 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label26.c [2022-07-19 12:41:25,544 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:41:25,544 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:41:25,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:41:25,616 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@a3cf3e4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15559d5 [2022-07-19 12:41:25,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:41:25,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:25,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 12:41:25,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:25,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:41:25,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:25,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:25,649 INFO L85 PathProgramCache]: Analyzing trace with hash -716875070, now seen corresponding path program 1 times [2022-07-19 12:41:25,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:25,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954248656] [2022-07-19 12:41:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:25,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:41:25,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:25,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954248656] [2022-07-19 12:41:25,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954248656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:41:25,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:41:25,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:41:25,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567562485] [2022-07-19 12:41:25,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:25,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:41:25,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:25,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:41:25,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:41:25,966 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:28,578 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2022-07-19 12:41:28,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:41:28,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2022-07-19 12:41:28,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:28,598 INFO L225 Difference]: With dead ends: 1642 [2022-07-19 12:41:28,598 INFO L226 Difference]: Without dead ends: 975 [2022-07-19 12:41:28,604 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 [2022-07-19 12:41:28,607 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 462 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:28,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:41:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-07-19 12:41:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2022-07-19 12:41:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2022-07-19 12:41:28,701 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 28 [2022-07-19 12:41:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:28,702 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2022-07-19 12:41:28,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2022-07-19 12:41:28,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-19 12:41:28,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:28,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:41:28,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:41:28,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:28,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:28,706 INFO L85 PathProgramCache]: Analyzing trace with hash 176078254, now seen corresponding path program 1 times [2022-07-19 12:41:28,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:28,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302602252] [2022-07-19 12:41:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:28,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:41:28,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:28,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302602252] [2022-07-19 12:41:28,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302602252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:41:28,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:41:28,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:41:28,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574889108] [2022-07-19 12:41:28,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:28,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:41:28,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:28,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:41:28,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:41:28,832 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:31,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:31,021 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2022-07-19 12:41:31,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:41:31,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-07-19 12:41:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:31,029 INFO L225 Difference]: With dead ends: 2814 [2022-07-19 12:41:31,029 INFO L226 Difference]: Without dead ends: 1844 [2022-07-19 12:41:31,032 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 [2022-07-19 12:41:31,033 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 463 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:31,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 12:41:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-07-19 12:41:31,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2022-07-19 12:41:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2022-07-19 12:41:31,076 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 98 [2022-07-19 12:41:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:31,077 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2022-07-19 12:41:31,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2022-07-19 12:41:31,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-19 12:41:31,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:31,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:41:31,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:41:31,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:31,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1322137327, now seen corresponding path program 1 times [2022-07-19 12:41:31,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:31,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219867224] [2022-07-19 12:41:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:31,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:41:31,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:31,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219867224] [2022-07-19 12:41:31,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219867224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:41:31,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:41:31,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:41:31,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924868751] [2022-07-19 12:41:31,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:31,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:41:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:31,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:41:31,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:41:31,236 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:33,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:33,188 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2022-07-19 12:41:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:41:33,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2022-07-19 12:41:33,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:33,211 INFO L225 Difference]: With dead ends: 5395 [2022-07-19 12:41:33,211 INFO L226 Difference]: Without dead ends: 2701 [2022-07-19 12:41:33,215 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 [2022-07-19 12:41:33,221 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:33,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 12:41:33,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2022-07-19 12:41:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2022-07-19 12:41:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2022-07-19 12:41:33,272 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 120 [2022-07-19 12:41:33,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:33,274 INFO L495 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2022-07-19 12:41:33,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2022-07-19 12:41:33,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-19 12:41:33,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:33,278 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:41:33,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:41:33,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:33,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1416376421, now seen corresponding path program 1 times [2022-07-19 12:41:33,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:33,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65929388] [2022-07-19 12:41:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:33,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:41:33,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:33,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65929388] [2022-07-19 12:41:33,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65929388] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:41:33,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:41:33,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:41:33,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855457074] [2022-07-19 12:41:33,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:33,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:41:33,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:33,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:41:33,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:41:33,417 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:35,143 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2022-07-19 12:41:35,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:41:35,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 180 [2022-07-19 12:41:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:35,159 INFO L225 Difference]: With dead ends: 7108 [2022-07-19 12:41:35,159 INFO L226 Difference]: Without dead ends: 4409 [2022-07-19 12:41:35,164 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 [2022-07-19 12:41:35,165 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:35,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 12:41:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2022-07-19 12:41:35,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2022-07-19 12:41:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2022-07-19 12:41:35,271 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 180 [2022-07-19 12:41:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:35,273 INFO L495 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2022-07-19 12:41:35,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2022-07-19 12:41:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-07-19 12:41:35,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:35,275 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:41:35,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 12:41:35,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash 744727648, now seen corresponding path program 1 times [2022-07-19 12:41:35,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:35,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536341138] [2022-07-19 12:41:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:35,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 12:41:35,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:35,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536341138] [2022-07-19 12:41:35,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536341138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:41:35,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:41:35,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:41:35,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492282965] [2022-07-19 12:41:35,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:35,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:41:35,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:35,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:41:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:41:35,464 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:37,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:37,233 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2022-07-19 12:41:37,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:41:37,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 182 [2022-07-19 12:41:37,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:37,254 INFO L225 Difference]: With dead ends: 10936 [2022-07-19 12:41:37,255 INFO L226 Difference]: Without dead ends: 6528 [2022-07-19 12:41:37,264 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 [2022-07-19 12:41:37,265 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 423 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:37,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 12:41:37,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2022-07-19 12:41:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2022-07-19 12:41:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:37,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2022-07-19 12:41:37,361 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 182 [2022-07-19 12:41:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:37,363 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2022-07-19 12:41:37,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2022-07-19 12:41:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-07-19 12:41:37,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:37,369 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:41:37,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 12:41:37,370 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash -929604570, now seen corresponding path program 1 times [2022-07-19 12:41:37,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:37,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666914331] [2022-07-19 12:41:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:37,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 51 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:41:37,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:37,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666914331] [2022-07-19 12:41:37,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666914331] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:41:37,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18697762] [2022-07-19 12:41:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:37,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:41:37,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:41:37,568 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) [2022-07-19 12:41:37,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 12:41:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:37,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 12:41:37,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:41:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 51 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:41:38,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 12:41:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:41:38,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18697762] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 12:41:38,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 12:41:38,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-19 12:41:38,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138762602] [2022-07-19 12:41:38,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:38,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:41:38,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:38,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:41:38,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:41:38,670 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:41,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:41,778 INFO L93 Difference]: Finished difference Result 15171 states and 17882 transitions. [2022-07-19 12:41:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:41:41,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 248 [2022-07-19 12:41:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:41,812 INFO L225 Difference]: With dead ends: 15171 [2022-07-19 12:41:41,812 INFO L226 Difference]: Without dead ends: 10791 [2022-07-19 12:41:41,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 491 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:41:41,820 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 980 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2171 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 3193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 2171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:41,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 145 Invalid, 3193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 2171 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-19 12:41:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10791 states. [2022-07-19 12:41:41,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10791 to 10789. [2022-07-19 12:41:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10789 states, 10788 states have (on average 1.1710233592880979) internal successors, (12633), 10788 states have internal predecessors, (12633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10789 states to 10789 states and 12633 transitions. [2022-07-19 12:41:42,035 INFO L78 Accepts]: Start accepts. Automaton has 10789 states and 12633 transitions. Word has length 248 [2022-07-19 12:41:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:42,036 INFO L495 AbstractCegarLoop]: Abstraction has 10789 states and 12633 transitions. [2022-07-19 12:41:42,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 10789 states and 12633 transitions. [2022-07-19 12:41:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-19 12:41:42,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:42,040 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:41:42,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 12:41:42,255 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,SelfDestructingSolverStorable5 [2022-07-19 12:41:42,256 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:42,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:42,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2024788157, now seen corresponding path program 1 times [2022-07-19 12:41:42,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:42,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145742039] [2022-07-19 12:41:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:42,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-07-19 12:41:42,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:42,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145742039] [2022-07-19 12:41:42,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145742039] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:41:42,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:41:42,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:41:42,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118325531] [2022-07-19 12:41:42,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:42,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:41:42,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:42,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:41:42,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:41:42,410 INFO L87 Difference]: Start difference. First operand 10789 states and 12633 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:44,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:44,177 INFO L93 Difference]: Finished difference Result 23703 states and 27793 transitions. [2022-07-19 12:41:44,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:41:44,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 260 [2022-07-19 12:41:44,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:44,209 INFO L225 Difference]: With dead ends: 23703 [2022-07-19 12:41:44,209 INFO L226 Difference]: Without dead ends: 12491 [2022-07-19 12:41:44,224 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 [2022-07-19 12:41:44,224 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 383 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:44,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 842 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 12:41:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12491 states. [2022-07-19 12:41:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12491 to 12491. [2022-07-19 12:41:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12491 states, 12490 states have (on average 1.1501200960768614) internal successors, (14365), 12490 states have internal predecessors, (14365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12491 states to 12491 states and 14365 transitions. [2022-07-19 12:41:44,463 INFO L78 Accepts]: Start accepts. Automaton has 12491 states and 14365 transitions. Word has length 260 [2022-07-19 12:41:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:44,464 INFO L495 AbstractCegarLoop]: Abstraction has 12491 states and 14365 transitions. [2022-07-19 12:41:44,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:44,464 INFO L276 IsEmpty]: Start isEmpty. Operand 12491 states and 14365 transitions. [2022-07-19 12:41:44,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-07-19 12:41:44,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:44,469 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:41:44,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:41:44,470 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:44,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1710928730, now seen corresponding path program 1 times [2022-07-19 12:41:44,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:44,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444169011] [2022-07-19 12:41:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:44,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-07-19 12:41:44,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:44,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444169011] [2022-07-19 12:41:44,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444169011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:41:44,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:41:44,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:41:44,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646116872] [2022-07-19 12:41:44,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:44,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:41:44,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:44,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:41:44,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:41:44,614 INFO L87 Difference]: Start difference. First operand 12491 states and 14365 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:46,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:46,414 INFO L93 Difference]: Finished difference Result 27534 states and 31665 transitions. [2022-07-19 12:41:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:41:46,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 300 [2022-07-19 12:41:46,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:46,443 INFO L225 Difference]: With dead ends: 27534 [2022-07-19 12:41:46,443 INFO L226 Difference]: Without dead ends: 14611 [2022-07-19 12:41:46,459 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 [2022-07-19 12:41:46,460 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 464 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:46,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 354 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 12:41:46,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14611 states. [2022-07-19 12:41:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14611 to 14182. [2022-07-19 12:41:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14182 states, 14181 states have (on average 1.1389887878146816) internal successors, (16152), 14181 states have internal predecessors, (16152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14182 states to 14182 states and 16152 transitions. [2022-07-19 12:41:46,717 INFO L78 Accepts]: Start accepts. Automaton has 14182 states and 16152 transitions. Word has length 300 [2022-07-19 12:41:46,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:46,718 INFO L495 AbstractCegarLoop]: Abstraction has 14182 states and 16152 transitions. [2022-07-19 12:41:46,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:46,719 INFO L276 IsEmpty]: Start isEmpty. Operand 14182 states and 16152 transitions. [2022-07-19 12:41:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-07-19 12:41:46,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:46,725 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:41:46,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:41:46,726 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:46,726 INFO L85 PathProgramCache]: Analyzing trace with hash 335207748, now seen corresponding path program 1 times [2022-07-19 12:41:46,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:46,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505453608] [2022-07-19 12:41:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:46,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-19 12:41:46,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:46,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505453608] [2022-07-19 12:41:46,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505453608] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:41:46,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:41:46,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:41:46,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508253634] [2022-07-19 12:41:46,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:46,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:41:46,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:41:46,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:41:46,881 INFO L87 Difference]: Start difference. First operand 14182 states and 16152 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:48,878 INFO L93 Difference]: Finished difference Result 37316 states and 42354 transitions. [2022-07-19 12:41:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:41:48,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2022-07-19 12:41:48,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:48,921 INFO L225 Difference]: With dead ends: 37316 [2022-07-19 12:41:48,922 INFO L226 Difference]: Without dead ends: 23136 [2022-07-19 12:41:48,943 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 [2022-07-19 12:41:48,943 INFO L413 NwaCegarLoop]: 768 mSDtfsCounter, 322 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:48,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 825 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 12:41:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23136 states. [2022-07-19 12:41:49,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23136 to 21418. [2022-07-19 12:41:49,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21418 states, 21417 states have (on average 1.120885278050147) internal successors, (24006), 21417 states have internal predecessors, (24006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21418 states to 21418 states and 24006 transitions. [2022-07-19 12:41:49,277 INFO L78 Accepts]: Start accepts. Automaton has 21418 states and 24006 transitions. Word has length 322 [2022-07-19 12:41:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:49,278 INFO L495 AbstractCegarLoop]: Abstraction has 21418 states and 24006 transitions. [2022-07-19 12:41:49,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:49,278 INFO L276 IsEmpty]: Start isEmpty. Operand 21418 states and 24006 transitions. [2022-07-19 12:41:49,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-07-19 12:41:49,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:49,285 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:41:49,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 12:41:49,285 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:49,286 INFO L85 PathProgramCache]: Analyzing trace with hash 185029324, now seen corresponding path program 1 times [2022-07-19 12:41:49,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:49,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547185309] [2022-07-19 12:41:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:49,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 212 proven. 78 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:41:49,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:49,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547185309] [2022-07-19 12:41:49,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547185309] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:41:49,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373786958] [2022-07-19 12:41:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:49,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:41:49,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:41:49,432 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) [2022-07-19 12:41:49,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 12:41:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:49,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 12:41:49,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:41:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 212 proven. 78 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:41:49,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 12:41:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:41:50,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373786958] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 12:41:50,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 12:41:50,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-19 12:41:50,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131422839] [2022-07-19 12:41:50,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:50,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:41:50,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:50,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:41:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:41:50,163 INFO L87 Difference]: Start difference. First operand 21418 states and 24006 transitions. Second operand has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:52,998 INFO L93 Difference]: Finished difference Result 51365 states and 57788 transitions. [2022-07-19 12:41:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:41:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 327 [2022-07-19 12:41:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:53,047 INFO L225 Difference]: With dead ends: 51365 [2022-07-19 12:41:53,047 INFO L226 Difference]: Without dead ends: 29521 [2022-07-19 12:41:53,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 649 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:41:53,068 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 891 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:53,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 175 Invalid, 2858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 12:41:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29521 states. [2022-07-19 12:41:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29521 to 28244. [2022-07-19 12:41:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28244 states, 28243 states have (on average 1.1312537619941225) internal successors, (31950), 28243 states have internal predecessors, (31950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28244 states to 28244 states and 31950 transitions. [2022-07-19 12:41:53,452 INFO L78 Accepts]: Start accepts. Automaton has 28244 states and 31950 transitions. Word has length 327 [2022-07-19 12:41:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:53,452 INFO L495 AbstractCegarLoop]: Abstraction has 28244 states and 31950 transitions. [2022-07-19 12:41:53,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:41:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 28244 states and 31950 transitions. [2022-07-19 12:41:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-07-19 12:41:53,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:53,459 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:41:53,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 12:41:53,683 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,SelfDestructingSolverStorable9 [2022-07-19 12:41:53,684 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:53,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:53,684 INFO L85 PathProgramCache]: Analyzing trace with hash 182989261, now seen corresponding path program 1 times [2022-07-19 12:41:53,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:53,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596424791] [2022-07-19 12:41:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:53,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 238 proven. 82 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:41:53,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:53,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596424791] [2022-07-19 12:41:53,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596424791] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:41:53,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946902913] [2022-07-19 12:41:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:53,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:41:53,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:41:53,992 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) [2022-07-19 12:41:53,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 12:41:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:54,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 12:41:54,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:41:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 238 proven. 82 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:41:55,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 12:41:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 238 proven. 82 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:41:56,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946902913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 12:41:56,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 12:41:56,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2022-07-19 12:41:56,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139273532] [2022-07-19 12:41:56,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 12:41:56,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 12:41:56,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:56,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 12:41:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:41:56,229 INFO L87 Difference]: Start difference. First operand 28244 states and 31950 transitions. Second operand has 9 states, 9 states have (on average 67.77777777777777) internal successors, (610), 8 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:42:02,269 INFO L93 Difference]: Finished difference Result 64690 states and 72502 transitions. [2022-07-19 12:42:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 12:42:02,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 67.77777777777777) internal successors, (610), 8 states have internal predecessors, (610), 0 states have call successors, (0), 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 340 [2022-07-19 12:42:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:42:02,320 INFO L225 Difference]: With dead ends: 64690 [2022-07-19 12:42:02,321 INFO L226 Difference]: Without dead ends: 36023 [2022-07-19 12:42:02,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 675 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-19 12:42:02,339 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 2659 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 6381 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2659 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 8745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 6381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1925 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:42:02,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2659 Valid, 518 Invalid, 8745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 6381 Invalid, 0 Unknown, 1925 Unchecked, 5.6s Time] [2022-07-19 12:42:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36023 states. [2022-07-19 12:42:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36023 to 33024. [2022-07-19 12:42:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33024 states, 33023 states have (on average 1.1206734700057535) internal successors, (37008), 33023 states have internal predecessors, (37008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:02,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33024 states to 33024 states and 37008 transitions. [2022-07-19 12:42:02,773 INFO L78 Accepts]: Start accepts. Automaton has 33024 states and 37008 transitions. Word has length 340 [2022-07-19 12:42:02,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:42:02,773 INFO L495 AbstractCegarLoop]: Abstraction has 33024 states and 37008 transitions. [2022-07-19 12:42:02,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 67.77777777777777) internal successors, (610), 8 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:02,774 INFO L276 IsEmpty]: Start isEmpty. Operand 33024 states and 37008 transitions. [2022-07-19 12:42:02,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-07-19 12:42:02,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:42:02,782 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:42:02,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 12:42:02,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:42:02,995 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:42:02,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:42:02,996 INFO L85 PathProgramCache]: Analyzing trace with hash -202956488, now seen corresponding path program 1 times [2022-07-19 12:42:02,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:42:02,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128594113] [2022-07-19 12:42:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:02,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:42:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:42:03,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:42:03,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128594113] [2022-07-19 12:42:03,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128594113] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:42:03,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:42:03,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:42:03,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274490532] [2022-07-19 12:42:03,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:42:03,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:42:03,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:42:03,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:42:03,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:42:03,232 INFO L87 Difference]: Start difference. First operand 33024 states and 37008 transitions. Second operand has 4 states, 4 states have (on average 91.75) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:42:05,463 INFO L93 Difference]: Finished difference Result 68491 states and 76657 transitions. [2022-07-19 12:42:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:42:05,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 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 367 [2022-07-19 12:42:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:42:05,507 INFO L225 Difference]: With dead ends: 68491 [2022-07-19 12:42:05,507 INFO L226 Difference]: Without dead ends: 35574 [2022-07-19 12:42:05,532 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 [2022-07-19 12:42:05,533 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 595 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:42:05,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 247 Invalid, 2610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 2328 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-19 12:42:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35574 states. [2022-07-19 12:42:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35574 to 33024. [2022-07-19 12:42:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33024 states, 33023 states have (on average 1.1206431880810344) internal successors, (37007), 33023 states have internal predecessors, (37007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33024 states to 33024 states and 37007 transitions. [2022-07-19 12:42:06,030 INFO L78 Accepts]: Start accepts. Automaton has 33024 states and 37007 transitions. Word has length 367 [2022-07-19 12:42:06,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:42:06,030 INFO L495 AbstractCegarLoop]: Abstraction has 33024 states and 37007 transitions. [2022-07-19 12:42:06,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 33024 states and 37007 transitions. [2022-07-19 12:42:06,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-07-19 12:42:06,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:42:06,037 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:42:06,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 12:42:06,037 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:42:06,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:42:06,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1005236947, now seen corresponding path program 1 times [2022-07-19 12:42:06,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:42:06,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540085655] [2022-07-19 12:42:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:06,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:42:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-19 12:42:06,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:42:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540085655] [2022-07-19 12:42:06,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540085655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:42:06,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:42:06,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:42:06,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202781199] [2022-07-19 12:42:06,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:42:06,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:42:06,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:42:06,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:42:06,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:42:06,206 INFO L87 Difference]: Start difference. First operand 33024 states and 37007 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:42:08,038 INFO L93 Difference]: Finished difference Result 81725 states and 92143 transitions. [2022-07-19 12:42:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:42:08,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 383 [2022-07-19 12:42:08,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:42:08,099 INFO L225 Difference]: With dead ends: 81725 [2022-07-19 12:42:08,099 INFO L226 Difference]: Without dead ends: 48804 [2022-07-19 12:42:08,120 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 [2022-07-19 12:42:08,121 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 370 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:42:08,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 275 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 12:42:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48804 states. [2022-07-19 12:42:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48804 to 47503. [2022-07-19 12:42:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47503 states, 47502 states have (on average 1.1183739632015495) internal successors, (53125), 47502 states have internal predecessors, (53125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47503 states to 47503 states and 53125 transitions. [2022-07-19 12:42:08,794 INFO L78 Accepts]: Start accepts. Automaton has 47503 states and 53125 transitions. Word has length 383 [2022-07-19 12:42:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:42:08,795 INFO L495 AbstractCegarLoop]: Abstraction has 47503 states and 53125 transitions. [2022-07-19 12:42:08,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 47503 states and 53125 transitions. [2022-07-19 12:42:08,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-07-19 12:42:08,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:42:08,810 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-19 12:42:08,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 12:42:08,810 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:42:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:42:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash -166528410, now seen corresponding path program 1 times [2022-07-19 12:42:08,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:42:08,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281222609] [2022-07-19 12:42:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:42:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 511 proven. 80 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:42:09,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:42:09,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281222609] [2022-07-19 12:42:09,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281222609] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:42:09,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836366018] [2022-07-19 12:42:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:09,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:42:09,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:42:09,056 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) [2022-07-19 12:42:09,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 12:42:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:09,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 12:42:09,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:42:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 591 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:42:09,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:42:09,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836366018] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:42:09,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:42:09,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-07-19 12:42:09,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933651964] [2022-07-19 12:42:09,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:42:09,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:42:09,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:42:09,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:42:09,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:42:09,707 INFO L87 Difference]: Start difference. First operand 47503 states and 53125 transitions. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:42:11,896 INFO L93 Difference]: Finished difference Result 96599 states and 107913 transitions. [2022-07-19 12:42:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:42:11,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 422 [2022-07-19 12:42:11,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:42:11,959 INFO L225 Difference]: With dead ends: 96599 [2022-07-19 12:42:11,960 INFO L226 Difference]: Without dead ends: 49628 [2022-07-19 12:42:11,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:42:11,990 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 803 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2148 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 2413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:42:11,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 355 Invalid, 2413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2148 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 12:42:12,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49628 states. [2022-07-19 12:42:12,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49628 to 48778. [2022-07-19 12:42:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48778 states, 48777 states have (on average 1.1159357894089428) internal successors, (54432), 48777 states have internal predecessors, (54432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48778 states to 48778 states and 54432 transitions. [2022-07-19 12:42:12,590 INFO L78 Accepts]: Start accepts. Automaton has 48778 states and 54432 transitions. Word has length 422 [2022-07-19 12:42:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:42:12,590 INFO L495 AbstractCegarLoop]: Abstraction has 48778 states and 54432 transitions. [2022-07-19 12:42:12,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:12,591 INFO L276 IsEmpty]: Start isEmpty. Operand 48778 states and 54432 transitions. [2022-07-19 12:42:12,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-07-19 12:42:12,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:42:12,597 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-19 12:42:12,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 12:42:12,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:42:12,799 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:42:12,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:42:12,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1024507897, now seen corresponding path program 1 times [2022-07-19 12:42:12,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:42:12,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51433062] [2022-07-19 12:42:12,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:12,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:42:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 503 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-07-19 12:42:13,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:42:13,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51433062] [2022-07-19 12:42:13,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51433062] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:42:13,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:42:13,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:42:13,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137328835] [2022-07-19 12:42:13,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:42:13,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:42:13,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:42:13,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:42:13,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:42:13,070 INFO L87 Difference]: Start difference. First operand 48778 states and 54432 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:42:15,092 INFO L93 Difference]: Finished difference Result 114475 states and 127617 transitions. [2022-07-19 12:42:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:42:15,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 428 [2022-07-19 12:42:15,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:42:15,168 INFO L225 Difference]: With dead ends: 114475 [2022-07-19 12:42:15,168 INFO L226 Difference]: Without dead ends: 64091 [2022-07-19 12:42:15,186 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 [2022-07-19 12:42:15,186 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 446 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:42:15,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 604 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 12:42:15,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64091 states. [2022-07-19 12:42:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64091 to 59397. [2022-07-19 12:42:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59397 states, 59396 states have (on average 1.1050575796349922) internal successors, (65636), 59396 states have internal predecessors, (65636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59397 states to 59397 states and 65636 transitions. [2022-07-19 12:42:15,887 INFO L78 Accepts]: Start accepts. Automaton has 59397 states and 65636 transitions. Word has length 428 [2022-07-19 12:42:15,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:42:15,887 INFO L495 AbstractCegarLoop]: Abstraction has 59397 states and 65636 transitions. [2022-07-19 12:42:15,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:15,888 INFO L276 IsEmpty]: Start isEmpty. Operand 59397 states and 65636 transitions. [2022-07-19 12:42:15,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2022-07-19 12:42:15,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:42:15,893 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:42:15,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 12:42:15,893 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:42:15,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:42:15,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1533610740, now seen corresponding path program 1 times [2022-07-19 12:42:15,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:42:15,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807999900] [2022-07-19 12:42:15,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:15,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:42:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 389 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-19 12:42:16,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:42:16,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807999900] [2022-07-19 12:42:16,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807999900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:42:16,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:42:16,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:42:16,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063163162] [2022-07-19 12:42:16,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:42:16,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:42:16,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:42:16,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:42:16,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:42:16,064 INFO L87 Difference]: Start difference. First operand 59397 states and 65636 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:18,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:42:18,166 INFO L93 Difference]: Finished difference Result 136578 states and 150995 transitions. [2022-07-19 12:42:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:42:18,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 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 452 [2022-07-19 12:42:18,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:42:18,263 INFO L225 Difference]: With dead ends: 136578 [2022-07-19 12:42:18,263 INFO L226 Difference]: Without dead ends: 78138 [2022-07-19 12:42:18,300 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 [2022-07-19 12:42:18,301 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 383 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:42:18,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 249 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 12:42:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78138 states. [2022-07-19 12:42:19,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78138 to 74707. [2022-07-19 12:42:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74707 states, 74706 states have (on average 1.0994431504832276) internal successors, (82135), 74706 states have internal predecessors, (82135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74707 states to 74707 states and 82135 transitions. [2022-07-19 12:42:19,371 INFO L78 Accepts]: Start accepts. Automaton has 74707 states and 82135 transitions. Word has length 452 [2022-07-19 12:42:19,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:42:19,371 INFO L495 AbstractCegarLoop]: Abstraction has 74707 states and 82135 transitions. [2022-07-19 12:42:19,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:19,372 INFO L276 IsEmpty]: Start isEmpty. Operand 74707 states and 82135 transitions. [2022-07-19 12:42:19,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-07-19 12:42:19,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:42:19,377 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:42:19,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 12:42:19,378 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:42:19,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:42:19,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1646221535, now seen corresponding path program 1 times [2022-07-19 12:42:19,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:42:19,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954704427] [2022-07-19 12:42:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:19,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:42:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-19 12:42:19,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:42:19,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954704427] [2022-07-19 12:42:19,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954704427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:42:19,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:42:19,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:42:19,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752646439] [2022-07-19 12:42:19,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:42:19,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:42:19,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:42:19,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:42:19,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:42:19,545 INFO L87 Difference]: Start difference. First operand 74707 states and 82135 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:42:21,890 INFO L93 Difference]: Finished difference Result 171032 states and 188052 transitions. [2022-07-19 12:42:21,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:42:21,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 453 [2022-07-19 12:42:21,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:42:22,007 INFO L225 Difference]: With dead ends: 171032 [2022-07-19 12:42:22,007 INFO L226 Difference]: Without dead ends: 96853 [2022-07-19 12:42:22,057 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 [2022-07-19 12:42:22,058 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 479 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:42:22,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 194 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 12:42:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96853 states. [2022-07-19 12:42:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96853 to 95551. [2022-07-19 12:42:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95551 states, 95550 states have (on average 1.0967974882260596) internal successors, (104799), 95550 states have internal predecessors, (104799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95551 states to 95551 states and 104799 transitions. [2022-07-19 12:42:23,451 INFO L78 Accepts]: Start accepts. Automaton has 95551 states and 104799 transitions. Word has length 453 [2022-07-19 12:42:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:42:23,451 INFO L495 AbstractCegarLoop]: Abstraction has 95551 states and 104799 transitions. [2022-07-19 12:42:23,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 95551 states and 104799 transitions. [2022-07-19 12:42:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2022-07-19 12:42:23,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:42:23,458 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:42:23,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 12:42:23,458 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:42:23,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:42:23,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2101201011, now seen corresponding path program 1 times [2022-07-19 12:42:23,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:42:23,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886047408] [2022-07-19 12:42:23,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:23,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:42:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 554 proven. 103 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:42:23,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:42:23,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886047408] [2022-07-19 12:42:23,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886047408] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:42:23,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169749024] [2022-07-19 12:42:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:23,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:42:23,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:42:23,818 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) [2022-07-19 12:42:23,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 12:42:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 12:42:23,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:42:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 388 proven. 269 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:42:25,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 12:42:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 552 proven. 105 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 12:42:26,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169749024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 12:42:26,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 12:42:26,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-07-19 12:42:26,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740201326] [2022-07-19 12:42:26,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 12:42:26,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 12:42:26,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:42:26,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 12:42:26,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-19 12:42:26,166 INFO L87 Difference]: Start difference. First operand 95551 states and 104799 transitions. Second operand has 12 states, 12 states have (on average 82.0) internal successors, (984), 12 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:42:33,857 INFO L93 Difference]: Finished difference Result 202657 states and 222135 transitions. [2022-07-19 12:42:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 12:42:33,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 82.0) internal successors, (984), 12 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 465 [2022-07-19 12:42:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:42:33,988 INFO L225 Difference]: With dead ends: 202657 [2022-07-19 12:42:33,988 INFO L226 Difference]: Without dead ends: 108063 [2022-07-19 12:42:34,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 932 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2022-07-19 12:42:34,018 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 5962 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 10198 mSolverCounterSat, 1457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5962 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 11655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1457 IncrementalHoareTripleChecker+Valid, 10198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:42:34,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5962 Valid, 568 Invalid, 11655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1457 Valid, 10198 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-07-19 12:42:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108063 states. [2022-07-19 12:42:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108063 to 95860. [2022-07-19 12:42:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95860 states, 95859 states have (on average 1.0911547168236682) internal successors, (104597), 95859 states have internal predecessors, (104597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95860 states to 95860 states and 104597 transitions. [2022-07-19 12:42:35,358 INFO L78 Accepts]: Start accepts. Automaton has 95860 states and 104597 transitions. Word has length 465 [2022-07-19 12:42:35,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:42:35,359 INFO L495 AbstractCegarLoop]: Abstraction has 95860 states and 104597 transitions. [2022-07-19 12:42:35,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.0) internal successors, (984), 12 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:35,359 INFO L276 IsEmpty]: Start isEmpty. Operand 95860 states and 104597 transitions. [2022-07-19 12:42:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2022-07-19 12:42:35,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:42:35,369 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:42:35,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 12:42:35,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 12:42:35,577 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:42:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:42:35,578 INFO L85 PathProgramCache]: Analyzing trace with hash -410257673, now seen corresponding path program 1 times [2022-07-19 12:42:35,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:42:35,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066958453] [2022-07-19 12:42:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:35,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:42:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 749 proven. 78 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-07-19 12:42:36,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:42:36,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066958453] [2022-07-19 12:42:36,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066958453] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:42:36,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063322653] [2022-07-19 12:42:36,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:36,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:42:36,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:42:36,071 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:42:36,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 12:42:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:36,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 12:42:36,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:42:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 478 proven. 26 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2022-07-19 12:42:36,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 12:42:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 478 proven. 26 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2022-07-19 12:42:36,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063322653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 12:42:36,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 12:42:36,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-19 12:42:36,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631125728] [2022-07-19 12:42:36,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 12:42:36,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 12:42:36,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:42:36,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 12:42:36,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:42:36,685 INFO L87 Difference]: Start difference. First operand 95860 states and 104597 transitions. Second operand has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:42:44,607 INFO L93 Difference]: Finished difference Result 247526 states and 268905 transitions. [2022-07-19 12:42:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 12:42:44,607 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 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 541 [2022-07-19 12:42:44,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:42:44,811 INFO L225 Difference]: With dead ends: 247526 [2022-07-19 12:42:44,811 INFO L226 Difference]: Without dead ends: 149961 [2022-07-19 12:42:44,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 1081 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-19 12:42:44,845 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 4279 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 8661 mSolverCounterSat, 1367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4279 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 10028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1367 IncrementalHoareTripleChecker+Valid, 8661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:42:44,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4279 Valid, 389 Invalid, 10028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1367 Valid, 8661 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-07-19 12:42:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149961 states. [2022-07-19 12:42:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149961 to 103935. [2022-07-19 12:42:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103935 states, 103934 states have (on average 1.077087382377278) internal successors, (111946), 103934 states have internal predecessors, (111946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:46,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103935 states to 103935 states and 111946 transitions. [2022-07-19 12:42:46,689 INFO L78 Accepts]: Start accepts. Automaton has 103935 states and 111946 transitions. Word has length 541 [2022-07-19 12:42:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:42:46,690 INFO L495 AbstractCegarLoop]: Abstraction has 103935 states and 111946 transitions. [2022-07-19 12:42:46,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:46,690 INFO L276 IsEmpty]: Start isEmpty. Operand 103935 states and 111946 transitions. [2022-07-19 12:42:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2022-07-19 12:42:46,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:42:46,699 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:42:46,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 12:42:46,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:42:46,900 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:42:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:42:46,901 INFO L85 PathProgramCache]: Analyzing trace with hash -166651842, now seen corresponding path program 1 times [2022-07-19 12:42:46,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:42:46,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901048330] [2022-07-19 12:42:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:46,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:42:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-07-19 12:42:47,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:42:47,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901048330] [2022-07-19 12:42:47,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901048330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:42:47,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:42:47,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:42:47,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014016068] [2022-07-19 12:42:47,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:42:47,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:42:47,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:42:47,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:42:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:42:47,065 INFO L87 Difference]: Start difference. First operand 103935 states and 111946 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:49,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:42:49,182 INFO L93 Difference]: Finished difference Result 212546 states and 228905 transitions. [2022-07-19 12:42:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:42:49,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 548 [2022-07-19 12:42:49,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:42:49,333 INFO L225 Difference]: With dead ends: 212546 [2022-07-19 12:42:49,333 INFO L226 Difference]: Without dead ends: 109037 [2022-07-19 12:42:49,632 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 [2022-07-19 12:42:49,633 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 493 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:42:49,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 677 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-19 12:42:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109037 states. [2022-07-19 12:42:50,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109037 to 106907. [2022-07-19 12:42:50,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106907 states, 106906 states have (on average 1.0694441846107796) internal successors, (114330), 106906 states have internal predecessors, (114330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106907 states to 106907 states and 114330 transitions. [2022-07-19 12:42:51,050 INFO L78 Accepts]: Start accepts. Automaton has 106907 states and 114330 transitions. Word has length 548 [2022-07-19 12:42:51,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:42:51,051 INFO L495 AbstractCegarLoop]: Abstraction has 106907 states and 114330 transitions. [2022-07-19 12:42:51,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 106907 states and 114330 transitions. [2022-07-19 12:42:51,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2022-07-19 12:42:51,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:42:51,060 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:42:51,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 12:42:51,061 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:42:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:42:51,061 INFO L85 PathProgramCache]: Analyzing trace with hash 254199019, now seen corresponding path program 1 times [2022-07-19 12:42:51,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:42:51,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432580292] [2022-07-19 12:42:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:51,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:42:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 798 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-07-19 12:42:51,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:42:51,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432580292] [2022-07-19 12:42:51,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432580292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:42:51,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:42:51,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:42:51,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469181433] [2022-07-19 12:42:51,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:42:51,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:42:51,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:42:51,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:42:51,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:42:51,232 INFO L87 Difference]: Start difference. First operand 106907 states and 114330 transitions. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:42:53,465 INFO L93 Difference]: Finished difference Result 219779 states and 234850 transitions. [2022-07-19 12:42:53,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:42:53,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 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 592 [2022-07-19 12:42:53,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:42:53,626 INFO L225 Difference]: With dead ends: 219779 [2022-07-19 12:42:53,627 INFO L226 Difference]: Without dead ends: 113724 [2022-07-19 12:42:53,690 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 [2022-07-19 12:42:53,690 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 327 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:42:53,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 261 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 12:42:54,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113724 states. [2022-07-19 12:42:55,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113724 to 109459. [2022-07-19 12:42:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109459 states, 109458 states have (on average 1.0638601107274024) internal successors, (116448), 109458 states have internal predecessors, (116448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:55,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109459 states to 109459 states and 116448 transitions. [2022-07-19 12:42:55,556 INFO L78 Accepts]: Start accepts. Automaton has 109459 states and 116448 transitions. Word has length 592 [2022-07-19 12:42:55,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:42:55,556 INFO L495 AbstractCegarLoop]: Abstraction has 109459 states and 116448 transitions. [2022-07-19 12:42:55,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:55,557 INFO L276 IsEmpty]: Start isEmpty. Operand 109459 states and 116448 transitions. [2022-07-19 12:42:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2022-07-19 12:42:55,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:42:55,569 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:42:55,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 12:42:55,569 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:42:55,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:42:55,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1962600891, now seen corresponding path program 1 times [2022-07-19 12:42:55,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:42:55,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959914240] [2022-07-19 12:42:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:42:55,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:42:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:42:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2022-07-19 12:42:55,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:42:55,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959914240] [2022-07-19 12:42:55,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959914240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:42:55,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:42:55,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:42:55,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850530941] [2022-07-19 12:42:55,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:42:55,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:42:55,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:42:55,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:42:55,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:42:55,800 INFO L87 Difference]: Start difference. First operand 109459 states and 116448 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:42:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:42:58,035 INFO L93 Difference]: Finished difference Result 232559 states and 247165 transitions. [2022-07-19 12:42:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:42:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 695 [2022-07-19 12:42:58,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:42:58,182 INFO L225 Difference]: With dead ends: 232559 [2022-07-19 12:42:58,183 INFO L226 Difference]: Without dead ends: 123522 [2022-07-19 12:42:58,248 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 [2022-07-19 12:42:58,249 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 482 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:42:58,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 206 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 12:42:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123522 states. [2022-07-19 12:42:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123522 to 101380. [2022-07-19 12:42:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101380 states, 101379 states have (on average 1.0639777468706537) internal successors, (107865), 101379 states have internal predecessors, (107865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:43:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101380 states to 101380 states and 107865 transitions. [2022-07-19 12:43:00,008 INFO L78 Accepts]: Start accepts. Automaton has 101380 states and 107865 transitions. Word has length 695 [2022-07-19 12:43:00,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:43:00,008 INFO L495 AbstractCegarLoop]: Abstraction has 101380 states and 107865 transitions. [2022-07-19 12:43:00,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:43:00,008 INFO L276 IsEmpty]: Start isEmpty. Operand 101380 states and 107865 transitions. [2022-07-19 12:43:00,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2022-07-19 12:43:00,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:43:00,018 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:43:00,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 12:43:00,018 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:43:00,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:43:00,018 INFO L85 PathProgramCache]: Analyzing trace with hash 574717115, now seen corresponding path program 1 times [2022-07-19 12:43:00,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:43:00,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893337722] [2022-07-19 12:43:00,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:43:00,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:43:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:43:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1585 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2022-07-19 12:43:00,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:43:00,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893337722] [2022-07-19 12:43:00,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893337722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:43:00,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:43:00,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:43:00,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611553234] [2022-07-19 12:43:00,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:43:00,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:43:00,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:43:00,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:43:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:43:00,266 INFO L87 Difference]: Start difference. First operand 101380 states and 107865 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) [2022-07-19 12:43:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:43:02,602 INFO L93 Difference]: Finished difference Result 215975 states and 229952 transitions. [2022-07-19 12:43:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:43:02,603 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 705 [2022-07-19 12:43:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:43:03,044 INFO L225 Difference]: With dead ends: 215975 [2022-07-19 12:43:03,044 INFO L226 Difference]: Without dead ends: 115447 [2022-07-19 12:43:03,102 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 [2022-07-19 12:43:03,108 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 355 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:43:03,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 246 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 12:43:03,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115447 states. [2022-07-19 12:43:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115447 to 99680. [2022-07-19 12:43:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99680 states, 99679 states have (on average 1.0642462303995828) internal successors, (106083), 99679 states have internal predecessors, (106083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:43:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99680 states to 99680 states and 106083 transitions. [2022-07-19 12:43:04,660 INFO L78 Accepts]: Start accepts. Automaton has 99680 states and 106083 transitions. Word has length 705 [2022-07-19 12:43:04,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:43:04,660 INFO L495 AbstractCegarLoop]: Abstraction has 99680 states and 106083 transitions. [2022-07-19 12:43:04,660 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) [2022-07-19 12:43:04,660 INFO L276 IsEmpty]: Start isEmpty. Operand 99680 states and 106083 transitions. [2022-07-19 12:43:04,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2022-07-19 12:43:04,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:43:04,670 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:43:04,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 12:43:04,671 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:43:04,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:43:04,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1218274851, now seen corresponding path program 1 times [2022-07-19 12:43:04,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:43:04,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580002695] [2022-07-19 12:43:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:43:04,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:43:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:43:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 1063 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2022-07-19 12:43:05,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:43:05,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580002695] [2022-07-19 12:43:05,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580002695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:43:05,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:43:05,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 12:43:05,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620808381] [2022-07-19 12:43:05,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:43:05,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:43:05,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:43:05,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:43:05,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:43:05,263 INFO L87 Difference]: Start difference. First operand 99680 states and 106083 transitions. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:43:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:43:08,487 INFO L93 Difference]: Finished difference Result 212984 states and 226370 transitions. [2022-07-19 12:43:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:43:08,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 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 717 [2022-07-19 12:43:08,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:43:08,633 INFO L225 Difference]: With dead ends: 212984 [2022-07-19 12:43:08,633 INFO L226 Difference]: Without dead ends: 114156 [2022-07-19 12:43:08,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:43:08,655 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 803 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2766 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 3058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 2766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:43:08,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 359 Invalid, 3058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 2766 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:43:08,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114156 states. [2022-07-19 12:43:10,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114156 to 109048. [2022-07-19 12:43:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109048 states, 109047 states have (on average 1.0607903014296587) internal successors, (115676), 109047 states have internal predecessors, (115676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:43:10,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109048 states to 109048 states and 115676 transitions. [2022-07-19 12:43:10,217 INFO L78 Accepts]: Start accepts. Automaton has 109048 states and 115676 transitions. Word has length 717 [2022-07-19 12:43:10,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:43:10,217 INFO L495 AbstractCegarLoop]: Abstraction has 109048 states and 115676 transitions. [2022-07-19 12:43:10,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:43:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 109048 states and 115676 transitions. [2022-07-19 12:43:10,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2022-07-19 12:43:10,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:43:10,235 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:43:10,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 12:43:10,235 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:43:10,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:43:10,235 INFO L85 PathProgramCache]: Analyzing trace with hash -734910041, now seen corresponding path program 1 times [2022-07-19 12:43:10,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:43:10,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670744461] [2022-07-19 12:43:10,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:43:10,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:43:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:43:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 929 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-07-19 12:43:10,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:43:10,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670744461] [2022-07-19 12:43:10,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670744461] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:43:10,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:43:10,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 12:43:10,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157047683] [2022-07-19 12:43:10,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:43:10,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:43:10,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:43:10,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:43:10,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:43:10,893 INFO L87 Difference]: Start difference. First operand 109048 states and 115676 transitions. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:43:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:43:13,688 INFO L93 Difference]: Finished difference Result 224914 states and 238419 transitions. [2022-07-19 12:43:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:43:13,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 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 752 [2022-07-19 12:43:13,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:43:13,812 INFO L225 Difference]: With dead ends: 224914 [2022-07-19 12:43:13,812 INFO L226 Difference]: Without dead ends: 116718 [2022-07-19 12:43:13,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:43:13,846 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 487 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 2352 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 2462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:43:13,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 323 Invalid, 2462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2352 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-19 12:43:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116718 states. [2022-07-19 12:43:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116718 to 111176. [2022-07-19 12:43:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111176 states, 111175 states have (on average 1.0602473577692826) internal successors, (117873), 111175 states have internal predecessors, (117873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)