./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label15.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_label15.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 a8ce96d555e872b609ed7174eef821f9a0406316106ba92ad582ec48aa272726 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:39:53,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:39:53,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:39:53,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:39:53,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:39:53,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:39:53,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:39:53,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:39:53,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:39:53,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:39:53,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:39:53,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:39:53,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:39:53,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:39:53,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:39:53,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:39:53,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:39:53,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:39:53,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:39:53,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:39:53,373 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:39:53,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:39:53,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:39:53,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:39:53,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:39:53,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:39:53,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:39:53,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:39:53,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:39:53,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:39:53,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:39:53,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:39:53,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:39:53,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:39:53,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:39:53,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:39:53,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:39:53,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:39:53,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:39:53,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:39:53,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:39:53,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:39:53,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:39:53,425 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:39:53,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:39:53,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:39:53,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:39:53,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:39:53,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:39:53,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:39:53,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:39:53,428 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:39:53,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:39:53,428 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:39:53,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:39:53,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:39:53,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:39:53,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:39:53,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:39:53,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:39:53,429 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:39:53,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:39:53,429 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:39:53,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:39:53,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:39:53,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:39:53,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:39:53,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:39:53,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:39:53,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:39:53,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:39:53,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:39:53,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:39:53,431 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:39:53,431 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:39:53,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:39:53,432 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8ce96d555e872b609ed7174eef821f9a0406316106ba92ad582ec48aa272726 [2022-07-19 12:39:53,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:39:53,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:39:53,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:39:53,639 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:39:53,639 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:39:53,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label15.c [2022-07-19 12:39:53,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e14dc50b1/78b8490cce674481a0b5c44dc40b4108/FLAGa368cb2c2 [2022-07-19 12:39:54,169 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:39:54,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label15.c [2022-07-19 12:39:54,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e14dc50b1/78b8490cce674481a0b5c44dc40b4108/FLAGa368cb2c2 [2022-07-19 12:39:54,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e14dc50b1/78b8490cce674481a0b5c44dc40b4108 [2022-07-19 12:39:54,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:39:54,436 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:39:54,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:39:54,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:39:54,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:39:54,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:39:54" (1/1) ... [2022-07-19 12:39:54,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce4a68b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:39:54, skipping insertion in model container [2022-07-19 12:39:54,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:39:54" (1/1) ... [2022-07-19 12:39:54,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:39:54,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:39:54,703 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_label15.c[5490,5503] [2022-07-19 12:39:55,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:39:55,098 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:39:55,121 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_label15.c[5490,5503] [2022-07-19 12:39:55,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:39:55,302 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:39:55,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:39:55 WrapperNode [2022-07-19 12:39:55,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:39:55,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:39:55,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:39:55,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:39:55,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:39:55" (1/1) ... [2022-07-19 12:39:55,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:39:55" (1/1) ... [2022-07-19 12:39:55,553 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-19 12:39:55,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:39:55,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:39:55,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:39:55,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:39:55,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:39:55" (1/1) ... [2022-07-19 12:39:55,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:39:55" (1/1) ... [2022-07-19 12:39:55,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:39:55" (1/1) ... [2022-07-19 12:39:55,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:39:55" (1/1) ... [2022-07-19 12:39:55,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:39:55" (1/1) ... [2022-07-19 12:39:55,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:39:55" (1/1) ... [2022-07-19 12:39:55,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:39:55" (1/1) ... [2022-07-19 12:39:55,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:39:55,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:39:55,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:39:55,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:39:55,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:39:55" (1/1) ... [2022-07-19 12:39:55,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:39:55,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:39:55,854 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 12:39:55,874 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 12:39:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:39:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:39:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:39:55,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:39:56,009 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:39:56,014 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:39:58,318 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:39:58,327 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:39:58,328 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:39:58,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:39:58 BoogieIcfgContainer [2022-07-19 12:39:58,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:39:58,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:39:58,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:39:58,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:39:58,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:39:54" (1/3) ... [2022-07-19 12:39:58,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75308866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:39:58, skipping insertion in model container [2022-07-19 12:39:58,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:39:55" (2/3) ... [2022-07-19 12:39:58,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75308866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:39:58, skipping insertion in model container [2022-07-19 12:39:58,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:39:58" (3/3) ... [2022-07-19 12:39:58,336 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label15.c [2022-07-19 12:39:58,346 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:39:58,346 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:39:58,386 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:39:58,391 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@28ed116e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@54a650b0 [2022-07-19 12:39:58,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:39:58,396 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 12:39:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 12:39:58,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:39:58,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:39:58,402 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:39:58,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:39:58,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1318097310, now seen corresponding path program 1 times [2022-07-19 12:39:58,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:39:58,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133141964] [2022-07-19 12:39:58,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:39:58,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:39:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:39:58,564 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 12:39:58,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:39:58,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133141964] [2022-07-19 12:39:58,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133141964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:39:58,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:39:58,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:39:58,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598425588] [2022-07-19 12:39:58,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:39:58,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:39:58,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:39:58,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:39:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:39:58,593 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 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:40:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:00,840 INFO L93 Difference]: Finished difference Result 1680 states and 3074 transitions. [2022-07-19 12:40:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:00,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-07-19 12:40:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:00,862 INFO L225 Difference]: With dead ends: 1680 [2022-07-19 12:40:00,862 INFO L226 Difference]: Without dead ends: 1011 [2022-07-19 12:40:00,867 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 12:40:00,873 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 545 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:00,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 220 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 12:40:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-07-19 12:40:00,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 996. [2022-07-19 12:40:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.735678391959799) internal successors, (1727), 995 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states 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 12:40:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1727 transitions. [2022-07-19 12:40:00,938 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1727 transitions. Word has length 36 [2022-07-19 12:40:00,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:00,938 INFO L495 AbstractCegarLoop]: Abstraction has 996 states and 1727 transitions. [2022-07-19 12:40:00,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:40:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1727 transitions. [2022-07-19 12:40:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-19 12:40:00,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:00,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:40:00,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:40:00,942 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:00,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1022017857, now seen corresponding path program 1 times [2022-07-19 12:40:00,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:00,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460590232] [2022-07-19 12:40:00,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:00,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:40:01,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:01,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460590232] [2022-07-19 12:40:01,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460590232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:01,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:01,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:40:01,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020781799] [2022-07-19 12:40:01,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:01,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:01,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:01,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:01,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:40:01,092 INFO L87 Difference]: Start difference. First operand 996 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 12:40:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:02,967 INFO L93 Difference]: Finished difference Result 2871 states and 5025 transitions. [2022-07-19 12:40:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:02,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2022-07-19 12:40:02,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:02,974 INFO L225 Difference]: With dead ends: 2871 [2022-07-19 12:40:02,974 INFO L226 Difference]: Without dead ends: 1877 [2022-07-19 12:40:02,980 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 12:40:02,981 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:02,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 520 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 12:40:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-07-19 12:40:03,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1870. [2022-07-19 12:40:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.4719101123595506) internal successors, (2751), 1869 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states 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 12:40:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2751 transitions. [2022-07-19 12:40:03,022 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2751 transitions. Word has length 101 [2022-07-19 12:40:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:03,023 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2751 transitions. [2022-07-19 12:40:03,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 12:40:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2751 transitions. [2022-07-19 12:40:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-19 12:40:03,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:03,030 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:40:03,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:40:03,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:03,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:03,033 INFO L85 PathProgramCache]: Analyzing trace with hash 688837838, now seen corresponding path program 1 times [2022-07-19 12:40:03,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:03,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570808294] [2022-07-19 12:40:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:03,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:40:03,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:03,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570808294] [2022-07-19 12:40:03,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570808294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:03,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:03,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:40:03,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989458134] [2022-07-19 12:40:03,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:03,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:40:03,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:03,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:40:03,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:40:03,188 INFO L87 Difference]: Start difference. First operand 1870 states and 2751 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 12:40:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:06,392 INFO L93 Difference]: Finished difference Result 6370 states and 9654 transitions. [2022-07-19 12:40:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:40:06,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2022-07-19 12:40:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:06,406 INFO L225 Difference]: With dead ends: 6370 [2022-07-19 12:40:06,406 INFO L226 Difference]: Without dead ends: 4502 [2022-07-19 12:40:06,409 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 12:40:06,410 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1084 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2582 mSolverCounterSat, 893 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 3475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 893 IncrementalHoareTripleChecker+Valid, 2582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:06,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 193 Invalid, 3475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [893 Valid, 2582 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-19 12:40:06,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4502 states. [2022-07-19 12:40:06,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4502 to 4497. [2022-07-19 12:40:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4497 states, 4496 states have (on average 1.4270462633451957) internal successors, (6416), 4496 states have internal predecessors, (6416), 0 states have call successors, (0), 0 states 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 12:40:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4497 states to 4497 states and 6416 transitions. [2022-07-19 12:40:06,513 INFO L78 Accepts]: Start accepts. Automaton has 4497 states and 6416 transitions. Word has length 106 [2022-07-19 12:40:06,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:06,513 INFO L495 AbstractCegarLoop]: Abstraction has 4497 states and 6416 transitions. [2022-07-19 12:40:06,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 12:40:06,514 INFO L276 IsEmpty]: Start isEmpty. Operand 4497 states and 6416 transitions. [2022-07-19 12:40:06,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-19 12:40:06,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:06,521 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:40:06,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:40:06,521 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:06,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:06,525 INFO L85 PathProgramCache]: Analyzing trace with hash 785603270, now seen corresponding path program 1 times [2022-07-19 12:40:06,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:06,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386141079] [2022-07-19 12:40:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:06,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:40:06,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:06,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386141079] [2022-07-19 12:40:06,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386141079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:06,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:06,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:40:06,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585117035] [2022-07-19 12:40:06,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:06,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:06,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:06,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:06,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:40:06,652 INFO L87 Difference]: Start difference. First operand 4497 states and 6416 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 12:40:08,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:08,534 INFO L93 Difference]: Finished difference Result 11974 states and 17431 transitions. [2022-07-19 12:40:08,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:08,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 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 142 [2022-07-19 12:40:08,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:08,554 INFO L225 Difference]: With dead ends: 11974 [2022-07-19 12:40:08,554 INFO L226 Difference]: Without dead ends: 7479 [2022-07-19 12:40:08,561 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 12:40:08,562 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 364 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:08,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 497 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 12:40:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7479 states. [2022-07-19 12:40:08,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7479 to 7046. [2022-07-19 12:40:08,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7046 states, 7045 states have (on average 1.3349893541518807) internal successors, (9405), 7045 states have internal predecessors, (9405), 0 states have call successors, (0), 0 states 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 12:40:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7046 states to 7046 states and 9405 transitions. [2022-07-19 12:40:08,742 INFO L78 Accepts]: Start accepts. Automaton has 7046 states and 9405 transitions. Word has length 142 [2022-07-19 12:40:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:08,743 INFO L495 AbstractCegarLoop]: Abstraction has 7046 states and 9405 transitions. [2022-07-19 12:40:08,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 12:40:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 7046 states and 9405 transitions. [2022-07-19 12:40:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-07-19 12:40:08,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:08,746 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:40:08,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 12:40:08,746 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1939867091, now seen corresponding path program 1 times [2022-07-19 12:40:08,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:08,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847343294] [2022-07-19 12:40:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:08,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 12:40:08,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:08,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847343294] [2022-07-19 12:40:08,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847343294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:08,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:08,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:40:08,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698331939] [2022-07-19 12:40:08,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:08,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:08,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:08,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:08,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:40:08,860 INFO L87 Difference]: Start difference. First operand 7046 states and 9405 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 12:40:10,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:10,489 INFO L93 Difference]: Finished difference Result 18773 states and 25521 transitions. [2022-07-19 12:40:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:10,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 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 171 [2022-07-19 12:40:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:10,517 INFO L225 Difference]: With dead ends: 18773 [2022-07-19 12:40:10,517 INFO L226 Difference]: Without dead ends: 11300 [2022-07-19 12:40:10,526 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 12:40:10,527 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:10,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 12:40:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11300 states. [2022-07-19 12:40:10,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11300 to 8323. [2022-07-19 12:40:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8323 states, 8322 states have (on average 1.2595529920692141) internal successors, (10482), 8322 states have internal predecessors, (10482), 0 states have call successors, (0), 0 states 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 12:40:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8323 states to 8323 states and 10482 transitions. [2022-07-19 12:40:10,728 INFO L78 Accepts]: Start accepts. Automaton has 8323 states and 10482 transitions. Word has length 171 [2022-07-19 12:40:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:10,729 INFO L495 AbstractCegarLoop]: Abstraction has 8323 states and 10482 transitions. [2022-07-19 12:40:10,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 12:40:10,732 INFO L276 IsEmpty]: Start isEmpty. Operand 8323 states and 10482 transitions. [2022-07-19 12:40:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-19 12:40:10,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:10,733 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:40:10,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 12:40:10,734 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:10,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2143225073, now seen corresponding path program 1 times [2022-07-19 12:40:10,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:10,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441954095] [2022-07-19 12:40:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:10,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:40:10,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:10,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441954095] [2022-07-19 12:40:10,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441954095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:10,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:10,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 12:40:10,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030244487] [2022-07-19 12:40:10,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:10,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 12:40:10,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:10,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 12:40:10,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:40:10,871 INFO L87 Difference]: Start difference. First operand 8323 states and 10482 transitions. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 12:40:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:12,824 INFO L93 Difference]: Finished difference Result 21360 states and 27400 transitions. [2022-07-19 12:40:12,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:40:12,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 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 184 [2022-07-19 12:40:12,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:12,857 INFO L225 Difference]: With dead ends: 21360 [2022-07-19 12:40:12,857 INFO L226 Difference]: Without dead ends: 13039 [2022-07-19 12:40:12,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:40:12,865 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 1164 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 2524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 780 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:12,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 834 Invalid, 2524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [780 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 12:40:12,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13039 states. [2022-07-19 12:40:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13039 to 12996. [2022-07-19 12:40:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12996 states, 12995 states have (on average 1.2273951519815314) internal successors, (15950), 12995 states have internal predecessors, (15950), 0 states have call successors, (0), 0 states 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 12:40:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12996 states to 12996 states and 15950 transitions. [2022-07-19 12:40:13,047 INFO L78 Accepts]: Start accepts. Automaton has 12996 states and 15950 transitions. Word has length 184 [2022-07-19 12:40:13,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:13,047 INFO L495 AbstractCegarLoop]: Abstraction has 12996 states and 15950 transitions. [2022-07-19 12:40:13,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 12:40:13,048 INFO L276 IsEmpty]: Start isEmpty. Operand 12996 states and 15950 transitions. [2022-07-19 12:40:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-07-19 12:40:13,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:13,051 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 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 12:40:13,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 12:40:13,052 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:13,052 INFO L85 PathProgramCache]: Analyzing trace with hash -525885613, now seen corresponding path program 1 times [2022-07-19 12:40:13,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:13,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427591745] [2022-07-19 12:40:13,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:13,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-07-19 12:40:13,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:13,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427591745] [2022-07-19 12:40:13,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427591745] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:13,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:13,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:40:13,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232275478] [2022-07-19 12:40:13,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:13,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:13,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:13,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:13,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:40:13,195 INFO L87 Difference]: Start difference. First operand 12996 states and 15950 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 12:40:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:14,963 INFO L93 Difference]: Finished difference Result 31503 states and 38604 transitions. [2022-07-19 12:40:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:14,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 289 [2022-07-19 12:40:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:14,991 INFO L225 Difference]: With dead ends: 31503 [2022-07-19 12:40:14,991 INFO L226 Difference]: Without dead ends: 17659 [2022-07-19 12:40:15,004 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 12:40:15,005 INFO L413 NwaCegarLoop]: 881 mSDtfsCounter, 408 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:15,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 952 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 12:40:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17659 states. [2022-07-19 12:40:15,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17659 to 12122. [2022-07-19 12:40:15,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12122 states, 12121 states have (on average 1.1796881445425296) internal successors, (14299), 12121 states have internal predecessors, (14299), 0 states have call successors, (0), 0 states 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 12:40:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12122 states to 12122 states and 14299 transitions. [2022-07-19 12:40:15,198 INFO L78 Accepts]: Start accepts. Automaton has 12122 states and 14299 transitions. Word has length 289 [2022-07-19 12:40:15,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:15,198 INFO L495 AbstractCegarLoop]: Abstraction has 12122 states and 14299 transitions. [2022-07-19 12:40:15,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 12:40:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 12122 states and 14299 transitions. [2022-07-19 12:40:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-07-19 12:40:15,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:15,202 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 12:40:15,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:40:15,202 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:15,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1232130859, now seen corresponding path program 1 times [2022-07-19 12:40:15,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:15,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818469993] [2022-07-19 12:40:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:15,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-07-19 12:40:15,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:15,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818469993] [2022-07-19 12:40:15,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818469993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:15,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:15,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:40:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145494847] [2022-07-19 12:40:15,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:15,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:15,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:40:15,297 INFO L87 Difference]: Start difference. First operand 12122 states and 14299 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 12:40:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:16,965 INFO L93 Difference]: Finished difference Result 31047 states and 36683 transitions. [2022-07-19 12:40:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:16,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 306 [2022-07-19 12:40:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:16,989 INFO L225 Difference]: With dead ends: 31047 [2022-07-19 12:40:16,990 INFO L226 Difference]: Without dead ends: 18927 [2022-07-19 12:40:17,001 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 12:40:17,002 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 457 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:17,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 405 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 12:40:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18927 states. [2022-07-19 12:40:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18927 to 16794. [2022-07-19 12:40:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16794 states, 16793 states have (on average 1.1678675638658964) internal successors, (19612), 16793 states have internal predecessors, (19612), 0 states have call successors, (0), 0 states 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 12:40:17,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16794 states to 16794 states and 19612 transitions. [2022-07-19 12:40:17,230 INFO L78 Accepts]: Start accepts. Automaton has 16794 states and 19612 transitions. Word has length 306 [2022-07-19 12:40:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:17,231 INFO L495 AbstractCegarLoop]: Abstraction has 16794 states and 19612 transitions. [2022-07-19 12:40:17,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 12:40:17,231 INFO L276 IsEmpty]: Start isEmpty. Operand 16794 states and 19612 transitions. [2022-07-19 12:40:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-07-19 12:40:17,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:17,236 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:40:17,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:40:17,238 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:17,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1461489624, now seen corresponding path program 1 times [2022-07-19 12:40:17,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:17,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867478099] [2022-07-19 12:40:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:17,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 12:40:17,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:17,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867478099] [2022-07-19 12:40:17,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867478099] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:17,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:17,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:40:17,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042261976] [2022-07-19 12:40:17,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:17,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:17,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:17,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:17,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:40:17,351 INFO L87 Difference]: Start difference. First operand 16794 states and 19612 transitions. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 12:40:19,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:19,107 INFO L93 Difference]: Finished difference Result 40447 states and 47562 transitions. [2022-07-19 12:40:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:19,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 350 [2022-07-19 12:40:19,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:19,129 INFO L225 Difference]: With dead ends: 40447 [2022-07-19 12:40:19,130 INFO L226 Difference]: Without dead ends: 22805 [2022-07-19 12:40:19,138 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 12:40:19,138 INFO L413 NwaCegarLoop]: 845 mSDtfsCounter, 382 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:19,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 920 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 12:40:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22805 states. [2022-07-19 12:40:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22805 to 22370. [2022-07-19 12:40:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22370 states, 22369 states have (on average 1.1468550225758862) internal successors, (25654), 22369 states have internal predecessors, (25654), 0 states have call successors, (0), 0 states 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 12:40:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22370 states to 22370 states and 25654 transitions. [2022-07-19 12:40:19,330 INFO L78 Accepts]: Start accepts. Automaton has 22370 states and 25654 transitions. Word has length 350 [2022-07-19 12:40:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:19,333 INFO L495 AbstractCegarLoop]: Abstraction has 22370 states and 25654 transitions. [2022-07-19 12:40:19,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 12:40:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 22370 states and 25654 transitions. [2022-07-19 12:40:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-07-19 12:40:19,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:19,338 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:40:19,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 12:40:19,338 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:19,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:19,339 INFO L85 PathProgramCache]: Analyzing trace with hash -397845730, now seen corresponding path program 1 times [2022-07-19 12:40:19,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:19,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968115678] [2022-07-19 12:40:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:19,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-19 12:40:19,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:19,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968115678] [2022-07-19 12:40:19,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968115678] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:19,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:19,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:40:19,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896727671] [2022-07-19 12:40:19,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:19,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:19,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:19,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:19,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:40:19,461 INFO L87 Difference]: Start difference. First operand 22370 states and 25654 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 12:40:21,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:21,221 INFO L93 Difference]: Finished difference Result 55832 states and 64075 transitions. [2022-07-19 12:40:21,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:21,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 357 [2022-07-19 12:40:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:21,259 INFO L225 Difference]: With dead ends: 55832 [2022-07-19 12:40:21,259 INFO L226 Difference]: Without dead ends: 33024 [2022-07-19 12:40:21,274 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 12:40:21,275 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 397 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:21,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 763 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 12:40:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33024 states. [2022-07-19 12:40:21,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33024 to 28338. [2022-07-19 12:40:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28338 states, 28337 states have (on average 1.144545999929421) internal successors, (32433), 28337 states have internal predecessors, (32433), 0 states have call successors, (0), 0 states 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 12:40:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28338 states to 28338 states and 32433 transitions. [2022-07-19 12:40:21,564 INFO L78 Accepts]: Start accepts. Automaton has 28338 states and 32433 transitions. Word has length 357 [2022-07-19 12:40:21,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:21,565 INFO L495 AbstractCegarLoop]: Abstraction has 28338 states and 32433 transitions. [2022-07-19 12:40:21,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 12:40:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 28338 states and 32433 transitions. [2022-07-19 12:40:21,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-07-19 12:40:21,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:21,573 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-19 12:40:21,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 12:40:21,574 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:21,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:21,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1041601103, now seen corresponding path program 1 times [2022-07-19 12:40:21,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:21,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137223649] [2022-07-19 12:40:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:21,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 527 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-19 12:40:21,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:21,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137223649] [2022-07-19 12:40:21,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137223649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:21,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:21,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:40:21,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805298339] [2022-07-19 12:40:21,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:21,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:21,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:21,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:40:21,753 INFO L87 Difference]: Start difference. First operand 28338 states and 32433 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 12:40:23,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:23,579 INFO L93 Difference]: Finished difference Result 70298 states and 80376 transitions. [2022-07-19 12:40:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:23,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 432 [2022-07-19 12:40:23,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:23,623 INFO L225 Difference]: With dead ends: 70298 [2022-07-19 12:40:23,624 INFO L226 Difference]: Without dead ends: 41095 [2022-07-19 12:40:23,645 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 12:40:23,646 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 447 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:23,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 651 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 12:40:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41095 states. [2022-07-19 12:40:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41095 to 36829. [2022-07-19 12:40:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36829 states, 36828 states have (on average 1.1286249592701205) internal successors, (41565), 36828 states have internal predecessors, (41565), 0 states have call successors, (0), 0 states 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 12:40:24,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36829 states to 36829 states and 41565 transitions. [2022-07-19 12:40:24,229 INFO L78 Accepts]: Start accepts. Automaton has 36829 states and 41565 transitions. Word has length 432 [2022-07-19 12:40:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:24,229 INFO L495 AbstractCegarLoop]: Abstraction has 36829 states and 41565 transitions. [2022-07-19 12:40:24,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 12:40:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 36829 states and 41565 transitions. [2022-07-19 12:40:24,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-07-19 12:40:24,270 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:24,270 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:40:24,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 12:40:24,270 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:24,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:24,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1448528408, now seen corresponding path program 1 times [2022-07-19 12:40:24,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:24,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487208083] [2022-07-19 12:40:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:24,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 12:40:24,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:24,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487208083] [2022-07-19 12:40:24,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487208083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:24,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:24,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 12:40:24,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480263533] [2022-07-19 12:40:24,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:24,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:40:24,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:24,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:40:24,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:40:24,408 INFO L87 Difference]: Start difference. First operand 36829 states and 41565 transitions. Second operand has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 12:40:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:26,936 INFO L93 Difference]: Finished difference Result 89878 states and 101625 transitions. [2022-07-19 12:40:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:40:26,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 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 436 [2022-07-19 12:40:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:27,005 INFO L225 Difference]: With dead ends: 89878 [2022-07-19 12:40:27,006 INFO L226 Difference]: Without dead ends: 53051 [2022-07-19 12:40:27,032 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 12:40:27,033 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 816 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:27,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 203 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 2356 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 12:40:27,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53051 states. [2022-07-19 12:40:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53051 to 47506. [2022-07-19 12:40:27,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47506 states, 47505 states have (on average 1.1353331228291759) internal successors, (53934), 47505 states have internal predecessors, (53934), 0 states have call successors, (0), 0 states 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 12:40:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47506 states to 47506 states and 53934 transitions. [2022-07-19 12:40:27,648 INFO L78 Accepts]: Start accepts. Automaton has 47506 states and 53934 transitions. Word has length 436 [2022-07-19 12:40:27,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:27,649 INFO L495 AbstractCegarLoop]: Abstraction has 47506 states and 53934 transitions. [2022-07-19 12:40:27,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 12:40:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 47506 states and 53934 transitions. [2022-07-19 12:40:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-07-19 12:40:27,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:27,656 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 12:40:27,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 12:40:27,656 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:27,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:27,657 INFO L85 PathProgramCache]: Analyzing trace with hash 510641702, now seen corresponding path program 1 times [2022-07-19 12:40:27,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:27,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314786399] [2022-07-19 12:40:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:27,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 566 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-19 12:40:27,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:27,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314786399] [2022-07-19 12:40:27,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314786399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:27,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:27,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:40:27,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694831863] [2022-07-19 12:40:27,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:27,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:27,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:27,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:27,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:40:27,767 INFO L87 Difference]: Start difference. First operand 47506 states and 53934 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states 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 12:40:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:29,628 INFO L93 Difference]: Finished difference Result 113738 states and 129584 transitions. [2022-07-19 12:40:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:29,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 455 [2022-07-19 12:40:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:29,708 INFO L225 Difference]: With dead ends: 113738 [2022-07-19 12:40:29,708 INFO L226 Difference]: Without dead ends: 66234 [2022-07-19 12:40:29,740 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 12:40:29,741 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 395 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:29,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 317 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 12:40:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66234 states. [2022-07-19 12:40:30,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66234 to 64943. [2022-07-19 12:40:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64943 states, 64942 states have (on average 1.1276985617936004) internal successors, (73235), 64942 states have internal predecessors, (73235), 0 states have call successors, (0), 0 states 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 12:40:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64943 states to 64943 states and 73235 transitions. [2022-07-19 12:40:30,675 INFO L78 Accepts]: Start accepts. Automaton has 64943 states and 73235 transitions. Word has length 455 [2022-07-19 12:40:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:30,675 INFO L495 AbstractCegarLoop]: Abstraction has 64943 states and 73235 transitions. [2022-07-19 12:40:30,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states 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 12:40:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 64943 states and 73235 transitions. [2022-07-19 12:40:30,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-07-19 12:40:30,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:30,683 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-19 12:40:30,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 12:40:30,683 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash -526620874, now seen corresponding path program 1 times [2022-07-19 12:40:30,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:30,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842692045] [2022-07-19 12:40:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:30,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-19 12:40:30,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:30,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842692045] [2022-07-19 12:40:30,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842692045] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:30,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:30,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:40:30,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148444181] [2022-07-19 12:40:30,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:30,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:30,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:30,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:30,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:40:30,811 INFO L87 Difference]: Start difference. First operand 64943 states and 73235 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 12:40:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:32,901 INFO L93 Difference]: Finished difference Result 143076 states and 160759 transitions. [2022-07-19 12:40:32,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:32,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 456 [2022-07-19 12:40:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:33,000 INFO L225 Difference]: With dead ends: 143076 [2022-07-19 12:40:33,001 INFO L226 Difference]: Without dead ends: 77710 [2022-07-19 12:40:33,036 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 12:40:33,037 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 368 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:33,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 811 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 12:40:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77710 states. [2022-07-19 12:40:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77710 to 75139. [2022-07-19 12:40:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75139 states, 75138 states have (on average 1.1158534962335969) internal successors, (83843), 75138 states have internal predecessors, (83843), 0 states have call successors, (0), 0 states 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 12:40:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75139 states to 75139 states and 83843 transitions. [2022-07-19 12:40:34,151 INFO L78 Accepts]: Start accepts. Automaton has 75139 states and 83843 transitions. Word has length 456 [2022-07-19 12:40:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:34,152 INFO L495 AbstractCegarLoop]: Abstraction has 75139 states and 83843 transitions. [2022-07-19 12:40:34,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 12:40:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 75139 states and 83843 transitions. [2022-07-19 12:40:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-07-19 12:40:34,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:34,161 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:40:34,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 12:40:34,161 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:34,162 INFO L85 PathProgramCache]: Analyzing trace with hash 102580086, now seen corresponding path program 1 times [2022-07-19 12:40:34,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:34,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71910970] [2022-07-19 12:40:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:34,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 424 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-19 12:40:34,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:34,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71910970] [2022-07-19 12:40:34,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71910970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:34,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:34,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:40:34,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488848377] [2022-07-19 12:40:34,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:34,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:34,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:34,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:34,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:40:34,292 INFO L87 Difference]: Start difference. First operand 75139 states and 83843 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:40:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:36,184 INFO L93 Difference]: Finished difference Result 159645 states and 178328 transitions. [2022-07-19 12:40:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:36,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 474 [2022-07-19 12:40:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:36,277 INFO L225 Difference]: With dead ends: 159645 [2022-07-19 12:40:36,278 INFO L226 Difference]: Without dead ends: 84508 [2022-07-19 12:40:36,321 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 12:40:36,322 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 339 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:36,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 764 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 12:40:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84508 states. [2022-07-19 12:40:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84508 to 75960. [2022-07-19 12:40:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75960 states, 75959 states have (on average 1.1049645203333378) internal successors, (83932), 75959 states have internal predecessors, (83932), 0 states have call successors, (0), 0 states 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 12:40:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75960 states to 75960 states and 83932 transitions. [2022-07-19 12:40:37,378 INFO L78 Accepts]: Start accepts. Automaton has 75960 states and 83932 transitions. Word has length 474 [2022-07-19 12:40:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:37,378 INFO L495 AbstractCegarLoop]: Abstraction has 75960 states and 83932 transitions. [2022-07-19 12:40:37,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:40:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 75960 states and 83932 transitions. [2022-07-19 12:40:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-07-19 12:40:37,387 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:37,388 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:40:37,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 12:40:37,388 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:37,388 INFO L85 PathProgramCache]: Analyzing trace with hash 984657420, now seen corresponding path program 1 times [2022-07-19 12:40:37,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:37,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061643457] [2022-07-19 12:40:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:37,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-19 12:40:37,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:37,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061643457] [2022-07-19 12:40:37,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061643457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:37,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:37,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:40:37,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765064814] [2022-07-19 12:40:37,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:37,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:37,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:37,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:37,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:40:37,544 INFO L87 Difference]: Start difference. First operand 75960 states and 83932 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 12:40:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:39,462 INFO L93 Difference]: Finished difference Result 167253 states and 184599 transitions. [2022-07-19 12:40:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:39,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 479 [2022-07-19 12:40:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:39,559 INFO L225 Difference]: With dead ends: 167253 [2022-07-19 12:40:39,559 INFO L226 Difference]: Without dead ends: 91295 [2022-07-19 12:40:39,589 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 12:40:39,590 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 291 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:39,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 815 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 12:40:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91295 states. [2022-07-19 12:40:40,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91295 to 90422. [2022-07-19 12:40:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90422 states, 90421 states have (on average 1.096393536899614) internal successors, (99137), 90421 states have internal predecessors, (99137), 0 states have call successors, (0), 0 states 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 12:40:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90422 states to 90422 states and 99137 transitions. [2022-07-19 12:40:40,681 INFO L78 Accepts]: Start accepts. Automaton has 90422 states and 99137 transitions. Word has length 479 [2022-07-19 12:40:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:40,682 INFO L495 AbstractCegarLoop]: Abstraction has 90422 states and 99137 transitions. [2022-07-19 12:40:40,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 12:40:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 90422 states and 99137 transitions. [2022-07-19 12:40:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-07-19 12:40:40,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:40,691 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:40:40,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 12:40:40,692 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1207529746, now seen corresponding path program 1 times [2022-07-19 12:40:40,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:40,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007527635] [2022-07-19 12:40:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:40,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 552 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-19 12:40:41,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:41,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007527635] [2022-07-19 12:40:41,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007527635] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:41,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:40:41,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:40:41,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071601205] [2022-07-19 12:40:41,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:41,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:41,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:41,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:41,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:40:41,021 INFO L87 Difference]: Start difference. First operand 90422 states and 99137 transitions. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 12:40:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:43,048 INFO L93 Difference]: Finished difference Result 191937 states and 210688 transitions. [2022-07-19 12:40:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:43,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 479 [2022-07-19 12:40:43,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:43,401 INFO L225 Difference]: With dead ends: 191937 [2022-07-19 12:40:43,415 INFO L226 Difference]: Without dead ends: 101087 [2022-07-19 12:40:43,454 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 12:40:43,457 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 436 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:43,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 249 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 12:40:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101087 states. [2022-07-19 12:40:44,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101087 to 98082. [2022-07-19 12:40:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98082 states, 98081 states have (on average 1.0972665449985217) internal successors, (107621), 98081 states have internal predecessors, (107621), 0 states have call successors, (0), 0 states 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 12:40:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98082 states to 98082 states and 107621 transitions. [2022-07-19 12:40:44,642 INFO L78 Accepts]: Start accepts. Automaton has 98082 states and 107621 transitions. Word has length 479 [2022-07-19 12:40:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:44,642 INFO L495 AbstractCegarLoop]: Abstraction has 98082 states and 107621 transitions. [2022-07-19 12:40:44,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 12:40:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 98082 states and 107621 transitions. [2022-07-19 12:40:44,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2022-07-19 12:40:44,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:44,661 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:40:44,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 12:40:44,661 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1207972705, now seen corresponding path program 1 times [2022-07-19 12:40:44,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:44,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710532042] [2022-07-19 12:40:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:44,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 17 proven. 84 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-19 12:40:44,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:44,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710532042] [2022-07-19 12:40:44,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710532042] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:40:44,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813775760] [2022-07-19 12:40:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:44,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:40:44,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:40:44,891 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 12:40:44,935 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 12:40:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:45,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:40:45,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:40:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-19 12:40:45,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:40:45,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813775760] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:45,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:40:45,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 12:40:45,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171091438] [2022-07-19 12:40:45,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:45,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:40:45,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:45,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:40:45,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:40:45,161 INFO L87 Difference]: Start difference. First operand 98082 states and 107621 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 12:40:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:47,049 INFO L93 Difference]: Finished difference Result 195307 states and 214212 transitions. [2022-07-19 12:40:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:40:47,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 482 [2022-07-19 12:40:47,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:47,157 INFO L225 Difference]: With dead ends: 195307 [2022-07-19 12:40:47,157 INFO L226 Difference]: Without dead ends: 96798 [2022-07-19 12:40:47,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 12:40:47,205 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 439 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:47,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 329 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-19 12:40:47,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96798 states. [2022-07-19 12:40:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96798 to 90834. [2022-07-19 12:40:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90834 states, 90833 states have (on average 1.0878425241927494) internal successors, (98812), 90833 states have internal predecessors, (98812), 0 states have call successors, (0), 0 states 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 12:40:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90834 states to 90834 states and 98812 transitions. [2022-07-19 12:40:48,455 INFO L78 Accepts]: Start accepts. Automaton has 90834 states and 98812 transitions. Word has length 482 [2022-07-19 12:40:48,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:48,460 INFO L495 AbstractCegarLoop]: Abstraction has 90834 states and 98812 transitions. [2022-07-19 12:40:48,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 12:40:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 90834 states and 98812 transitions. [2022-07-19 12:40:48,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-07-19 12:40:48,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:48,472 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-07-19 12:40:48,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 12:40:48,688 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,SelfDestructingSolverStorable17 [2022-07-19 12:40:48,689 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:48,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:48,690 INFO L85 PathProgramCache]: Analyzing trace with hash 618495215, now seen corresponding path program 1 times [2022-07-19 12:40:48,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:48,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148854597] [2022-07-19 12:40:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:48,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 532 proven. 108 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-19 12:40:48,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:48,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148854597] [2022-07-19 12:40:48,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148854597] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:40:48,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596185858] [2022-07-19 12:40:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:48,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:40:48,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:40:48,862 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 12:40:48,864 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 12:40:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:48,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 12:40:48,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:40:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 450 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-19 12:40:49,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:40:49,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596185858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:40:49,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:40:49,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-19 12:40:49,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78511051] [2022-07-19 12:40:49,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:40:49,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:40:49,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:49,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:40:49,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:40:49,591 INFO L87 Difference]: Start difference. First operand 90834 states and 98812 transitions. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 12:40:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:40:51,591 INFO L93 Difference]: Finished difference Result 125000 states and 136353 transitions. [2022-07-19 12:40:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:40:51,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 513 [2022-07-19 12:40:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:40:51,744 INFO L225 Difference]: With dead ends: 125000 [2022-07-19 12:40:51,744 INFO L226 Difference]: Without dead ends: 124998 [2022-07-19 12:40:51,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:40:51,777 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 389 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 2300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 806 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:40:51,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 214 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1216 Invalid, 0 Unknown, 806 Unchecked, 1.6s Time] [2022-07-19 12:40:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124998 states. [2022-07-19 12:40:53,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124998 to 111347. [2022-07-19 12:40:53,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111347 states, 111346 states have (on average 1.091714116358019) internal successors, (121558), 111346 states have internal predecessors, (121558), 0 states have call successors, (0), 0 states 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 12:40:53,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111347 states to 111347 states and 121558 transitions. [2022-07-19 12:40:53,409 INFO L78 Accepts]: Start accepts. Automaton has 111347 states and 121558 transitions. Word has length 513 [2022-07-19 12:40:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:40:53,410 INFO L495 AbstractCegarLoop]: Abstraction has 111347 states and 121558 transitions. [2022-07-19 12:40:53,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states 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 12:40:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 111347 states and 121558 transitions. [2022-07-19 12:40:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-07-19 12:40:53,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:40:53,422 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:40:53,441 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 12:40:53,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:40:53,636 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:40:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:40:53,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1842067513, now seen corresponding path program 1 times [2022-07-19 12:40:53,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:40:53,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577441029] [2022-07-19 12:40:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:53,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:40:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 336 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:40:53,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:40:53,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577441029] [2022-07-19 12:40:53,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577441029] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:40:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797359585] [2022-07-19 12:40:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:40:53,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:40:53,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:40:53,839 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 12:40:53,841 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 12:40:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:40:53,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 12:40:53,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:40:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 254 proven. 82 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 12:40:54,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 12:40:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 254 proven. 82 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 12:40:55,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797359585] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 12:40:55,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 12:40:55,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-07-19 12:40:55,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852324619] [2022-07-19 12:40:55,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 12:40:55,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 12:40:55,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:40:55,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 12:40:55,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:40:55,144 INFO L87 Difference]: Start difference. First operand 111347 states and 121558 transitions. Second operand has 9 states, 9 states have (on average 134.33333333333334) internal successors, (1209), 9 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states 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 12:41:07,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:07,436 INFO L93 Difference]: Finished difference Result 328886 states and 359909 transitions. [2022-07-19 12:41:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 12:41:07,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 134.33333333333334) internal successors, (1209), 9 states have internal predecessors, (1209), 0 states have call successors, (0), 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 527 [2022-07-19 12:41:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:07,918 INFO L225 Difference]: With dead ends: 328886 [2022-07-19 12:41:07,918 INFO L226 Difference]: Without dead ends: 217116 [2022-07-19 12:41:07,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2022-07-19 12:41:07,941 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 8320 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 13796 mSolverCounterSat, 2325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8320 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 16121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2325 IncrementalHoareTripleChecker+Valid, 13796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:07,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8320 Valid, 489 Invalid, 16121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2325 Valid, 13796 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2022-07-19 12:41:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217116 states. [2022-07-19 12:41:09,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217116 to 157792. [2022-07-19 12:41:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157792 states, 157791 states have (on average 1.0878440468721282) internal successors, (171652), 157791 states have internal predecessors, (171652), 0 states have call successors, (0), 0 states 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 12:41:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157792 states to 157792 states and 171652 transitions. [2022-07-19 12:41:10,164 INFO L78 Accepts]: Start accepts. Automaton has 157792 states and 171652 transitions. Word has length 527 [2022-07-19 12:41:10,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:10,165 INFO L495 AbstractCegarLoop]: Abstraction has 157792 states and 171652 transitions. [2022-07-19 12:41:10,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 134.33333333333334) internal successors, (1209), 9 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states 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 12:41:10,165 INFO L276 IsEmpty]: Start isEmpty. Operand 157792 states and 171652 transitions. [2022-07-19 12:41:10,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-07-19 12:41:10,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:10,173 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:41:10,190 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 12:41:10,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:41:10,377 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:10,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:10,377 INFO L85 PathProgramCache]: Analyzing trace with hash 69490722, now seen corresponding path program 1 times [2022-07-19 12:41:10,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:10,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073719521] [2022-07-19 12:41:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:10,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 613 proven. 141 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 12:41:10,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:10,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073719521] [2022-07-19 12:41:10,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073719521] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:41:10,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102541009] [2022-07-19 12:41:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:10,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:41:10,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:41:10,596 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 12:41:10,597 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 12:41:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:10,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:41:10,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:41:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2022-07-19 12:41:14,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:41:14,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102541009] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:41:14,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:41:14,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 12:41:14,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521205624] [2022-07-19 12:41:14,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:14,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:41:14,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:14,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:41:14,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:41:14,446 INFO L87 Difference]: Start difference. First operand 157792 states and 171652 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 12:41:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:14,876 INFO L93 Difference]: Finished difference Result 157828 states and 171688 transitions. [2022-07-19 12:41:14,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:41:14,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 543 [2022-07-19 12:41:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:15,067 INFO L225 Difference]: With dead ends: 157828 [2022-07-19 12:41:15,068 INFO L226 Difference]: Without dead ends: 157826 [2022-07-19 12:41:15,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 510 SyntacticMatches, 33 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:41:15,109 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 730 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:15,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 813 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 730 Unchecked, 0.0s Time] [2022-07-19 12:41:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157826 states. [2022-07-19 12:41:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157826 to 157792. [2022-07-19 12:41:16,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157792 states, 157791 states have (on average 1.0878440468721282) internal successors, (171652), 157791 states have internal predecessors, (171652), 0 states have call successors, (0), 0 states 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 12:41:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157792 states to 157792 states and 171652 transitions. [2022-07-19 12:41:17,079 INFO L78 Accepts]: Start accepts. Automaton has 157792 states and 171652 transitions. Word has length 543 [2022-07-19 12:41:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:17,079 INFO L495 AbstractCegarLoop]: Abstraction has 157792 states and 171652 transitions. [2022-07-19 12:41:17,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 12:41:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 157792 states and 171652 transitions. [2022-07-19 12:41:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-07-19 12:41:17,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:17,088 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:41:17,105 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 12:41:17,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:41:17,305 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:17,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:17,305 INFO L85 PathProgramCache]: Analyzing trace with hash -762174023, now seen corresponding path program 1 times [2022-07-19 12:41:17,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:17,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354298072] [2022-07-19 12:41:17,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:17,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 274 proven. 82 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 12:41:17,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:17,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354298072] [2022-07-19 12:41:17,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354298072] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:41:17,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281252518] [2022-07-19 12:41:17,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:17,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:41:17,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:41:17,490 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 12:41:17,871 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 12:41:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:18,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:41:18,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:41:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-07-19 12:41:18,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:41:18,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281252518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:41:18,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:41:18,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-07-19 12:41:18,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136996012] [2022-07-19 12:41:18,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:18,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:41:18,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:18,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:41:18,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:41:18,621 INFO L87 Difference]: Start difference. First operand 157792 states and 171652 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 12:41:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:19,017 INFO L93 Difference]: Finished difference Result 158219 states and 172079 transitions. [2022-07-19 12:41:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:41:19,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 547 [2022-07-19 12:41:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:19,394 INFO L225 Difference]: With dead ends: 158219 [2022-07-19 12:41:19,394 INFO L226 Difference]: Without dead ends: 157792 [2022-07-19 12:41:19,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:41:19,404 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 391 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1120 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:19,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 814 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 1120 Unchecked, 0.0s Time] [2022-07-19 12:41:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157792 states. [2022-07-19 12:41:20,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157792 to 156942. [2022-07-19 12:41:21,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156942 states, 156941 states have (on average 1.0864528708240677) internal successors, (170509), 156941 states have internal predecessors, (170509), 0 states have call successors, (0), 0 states 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 12:41:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156942 states to 156942 states and 170509 transitions. [2022-07-19 12:41:21,383 INFO L78 Accepts]: Start accepts. Automaton has 156942 states and 170509 transitions. Word has length 547 [2022-07-19 12:41:21,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:21,392 INFO L495 AbstractCegarLoop]: Abstraction has 156942 states and 170509 transitions. [2022-07-19 12:41:21,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 12:41:21,393 INFO L276 IsEmpty]: Start isEmpty. Operand 156942 states and 170509 transitions. [2022-07-19 12:41:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2022-07-19 12:41:21,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:21,404 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:41:21,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 12:41:21,620 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,SelfDestructingSolverStorable21 [2022-07-19 12:41:21,621 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:21,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:21,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1939608736, now seen corresponding path program 1 times [2022-07-19 12:41:21,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:21,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889583130] [2022-07-19 12:41:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:21,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 483 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-07-19 12:41:21,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:21,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889583130] [2022-07-19 12:41:21,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889583130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:41:21,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:41:21,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 12:41:21,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142685921] [2022-07-19 12:41:21,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:21,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:41:21,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:21,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:41:21,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:41:21,843 INFO L87 Difference]: Start difference. First operand 156942 states and 170509 transitions. Second operand has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 12:41:25,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:41:25,376 INFO L93 Difference]: Finished difference Result 328366 states and 356773 transitions. [2022-07-19 12:41:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:41:25,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 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 568 [2022-07-19 12:41:25,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:41:25,581 INFO L225 Difference]: With dead ends: 328366 [2022-07-19 12:41:25,582 INFO L226 Difference]: Without dead ends: 171426 [2022-07-19 12:41:25,665 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 12:41:25,666 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 741 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2881 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 3226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 2881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:41:25,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 400 Invalid, 3226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 2881 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:41:25,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171426 states. [2022-07-19 12:41:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171426 to 169712. [2022-07-19 12:41:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169712 states, 169711 states have (on average 1.0837187925355458) internal successors, (183919), 169711 states have internal predecessors, (183919), 0 states have call successors, (0), 0 states 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 12:41:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169712 states to 169712 states and 183919 transitions. [2022-07-19 12:41:28,172 INFO L78 Accepts]: Start accepts. Automaton has 169712 states and 183919 transitions. Word has length 568 [2022-07-19 12:41:28,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:41:28,173 INFO L495 AbstractCegarLoop]: Abstraction has 169712 states and 183919 transitions. [2022-07-19 12:41:28,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 12:41:28,174 INFO L276 IsEmpty]: Start isEmpty. Operand 169712 states and 183919 transitions. [2022-07-19 12:41:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2022-07-19 12:41:28,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:41:28,216 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 12:41:28,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 12:41:28,216 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:41:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:41:28,217 INFO L85 PathProgramCache]: Analyzing trace with hash 326686526, now seen corresponding path program 1 times [2022-07-19 12:41:28,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:41:28,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979454514] [2022-07-19 12:41:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:41:28,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:41:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:41:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 506 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-07-19 12:41:28,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:41:28,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979454514] [2022-07-19 12:41:28,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979454514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:41:28,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:41:28,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:41:28,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874887118] [2022-07-19 12:41:28,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:41:28,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:41:28,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:41:28,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:41:28,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:41:28,412 INFO L87 Difference]: Start difference. First operand 169712 states and 183919 transitions. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)