./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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_label00.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 28aa2103046ded31b2c668ebdabdc65e41c8f634ba4d86773363e431476a6327 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 01:28:16,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 01:28:16,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 01:28:16,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 01:28:16,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 01:28:16,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 01:28:16,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 01:28:16,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 01:28:16,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 01:28:16,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 01:28:16,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 01:28:16,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 01:28:16,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 01:28:16,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 01:28:16,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 01:28:16,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 01:28:16,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 01:28:16,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 01:28:16,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 01:28:16,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 01:28:16,340 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 01:28:16,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 01:28:16,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 01:28:16,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 01:28:16,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 01:28:16,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 01:28:16,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 01:28:16,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 01:28:16,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 01:28:16,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 01:28:16,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 01:28:16,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 01:28:16,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 01:28:16,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 01:28:16,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 01:28:16,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 01:28:16,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 01:28:16,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 01:28:16,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 01:28:16,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 01:28:16,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 01:28:16,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 01:28:16,357 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 01:28:16,378 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 01:28:16,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 01:28:16,379 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 01:28:16,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 01:28:16,380 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 01:28:16,380 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 01:28:16,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 01:28:16,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 01:28:16,381 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 01:28:16,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 01:28:16,381 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 01:28:16,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 01:28:16,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 01:28:16,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 01:28:16,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 01:28:16,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 01:28:16,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 01:28:16,382 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 01:28:16,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 01:28:16,383 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 01:28:16,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 01:28:16,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 01:28:16,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 01:28:16,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 01:28:16,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 01:28:16,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 01:28:16,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 01:28:16,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 01:28:16,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 01:28:16,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 01:28:16,384 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 01:28:16,384 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 01:28:16,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 01:28:16,385 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28aa2103046ded31b2c668ebdabdc65e41c8f634ba4d86773363e431476a6327 [2022-07-12 01:28:16,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 01:28:16,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 01:28:16,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 01:28:16,606 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 01:28:16,607 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 01:28:16,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label00.c [2022-07-12 01:28:16,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c4abc870/8f1a535d06774dd18cfbdddae8ee476a/FLAGf50da6968 [2022-07-12 01:28:17,125 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 01:28:17,126 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label00.c [2022-07-12 01:28:17,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c4abc870/8f1a535d06774dd18cfbdddae8ee476a/FLAGf50da6968 [2022-07-12 01:28:17,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c4abc870/8f1a535d06774dd18cfbdddae8ee476a [2022-07-12 01:28:17,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 01:28:17,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 01:28:17,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 01:28:17,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 01:28:17,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 01:28:17,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 01:28:17" (1/1) ... [2022-07-12 01:28:17,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78f21168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:28:17, skipping insertion in model container [2022-07-12 01:28:17,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 01:28:17" (1/1) ... [2022-07-12 01:28:17,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 01:28:17,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 01:28:17,657 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_label00.c[7994,8007] [2022-07-12 01:28:18,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 01:28:18,032 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 01:28:18,057 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_label00.c[7994,8007] [2022-07-12 01:28:18,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 01:28:18,234 INFO L208 MainTranslator]: Completed translation [2022-07-12 01:28:18,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:28:18 WrapperNode [2022-07-12 01:28:18,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 01:28:18,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 01:28:18,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 01:28:18,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 01:28:18,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:28:18" (1/1) ... [2022-07-12 01:28:18,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:28:18" (1/1) ... [2022-07-12 01:28:18,475 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-12 01:28:18,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 01:28:18,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 01:28:18,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 01:28:18,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 01:28:18,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:28:18" (1/1) ... [2022-07-12 01:28:18,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:28:18" (1/1) ... [2022-07-12 01:28:18,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:28:18" (1/1) ... [2022-07-12 01:28:18,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:28:18" (1/1) ... [2022-07-12 01:28:18,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:28:18" (1/1) ... [2022-07-12 01:28:18,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:28:18" (1/1) ... [2022-07-12 01:28:18,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:28:18" (1/1) ... [2022-07-12 01:28:18,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 01:28:18,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 01:28:18,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 01:28:18,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 01:28:18,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:28:18" (1/1) ... [2022-07-12 01:28:18,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 01:28:18,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 01:28:18,774 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) [2022-07-12 01:28:18,788 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 [2022-07-12 01:28:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 01:28:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 01:28:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 01:28:18,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 01:28:18,897 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 01:28:18,898 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 01:28:21,191 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 01:28:21,200 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 01:28:21,201 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 01:28:21,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 01:28:21 BoogieIcfgContainer [2022-07-12 01:28:21,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 01:28:21,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 01:28:21,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 01:28:21,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 01:28:21,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 01:28:17" (1/3) ... [2022-07-12 01:28:21,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b2f47a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 01:28:21, skipping insertion in model container [2022-07-12 01:28:21,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 01:28:18" (2/3) ... [2022-07-12 01:28:21,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b2f47a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 01:28:21, skipping insertion in model container [2022-07-12 01:28:21,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 01:28:21" (3/3) ... [2022-07-12 01:28:21,209 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label00.c [2022-07-12 01:28:21,219 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 01:28:21,219 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 01:28:21,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 01:28:21,264 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@6bb61277, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@389a2c98 [2022-07-12 01:28:21,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 01:28:21,269 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) [2022-07-12 01:28:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 01:28:21,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:21,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:28:21,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:21,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2022-07-12 01:28:21,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:21,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509246761] [2022-07-12 01:28:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:21,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:28:21,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:21,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509246761] [2022-07-12 01:28:21,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509246761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:28:21,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:28:21,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 01:28:21,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020743243] [2022-07-12 01:28:21,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:28:21,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:28:21,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:21,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:28:21,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:28:21,489 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 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:28:23,739 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2022-07-12 01:28:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:28:23,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-12 01:28:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:28:23,755 INFO L225 Difference]: With dead ends: 1642 [2022-07-12 01:28:23,756 INFO L226 Difference]: Without dead ends: 975 [2022-07-12 01:28:23,760 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 [2022-07-12 01:28:23,762 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 436 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-12 01:28:23,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-12 01:28:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-07-12 01:28:23,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2022-07-12 01:28:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2022-07-12 01:28:23,833 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 54 [2022-07-12 01:28:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:28:23,833 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2022-07-12 01:28:23,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2022-07-12 01:28:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-12 01:28:23,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:23,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-12 01:28:23,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 01:28:23,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:23,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash 628146390, now seen corresponding path program 1 times [2022-07-12 01:28:23,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:23,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357078722] [2022-07-12 01:28:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:23,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:28:23,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:23,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357078722] [2022-07-12 01:28:23,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357078722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:28:23,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:28:23,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:28:23,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961692233] [2022-07-12 01:28:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:28:23,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 01:28:23,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:23,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 01:28:23,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 01:28:23,973 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:27,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:28:27,223 INFO L93 Difference]: Finished difference Result 3737 states and 5655 transitions. [2022-07-12 01:28:27,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 01:28:27,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-07-12 01:28:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:28:27,244 INFO L225 Difference]: With dead ends: 3737 [2022-07-12 01:28:27,244 INFO L226 Difference]: Without dead ends: 2767 [2022-07-12 01:28:27,245 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 [2022-07-12 01:28:27,246 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 867 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2827 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 3417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 2827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-12 01:28:27,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 313 Invalid, 3417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 2827 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-12 01:28:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2022-07-12 01:28:27,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2724. [2022-07-12 01:28:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 1.3947851634226955) internal successors, (3798), 2723 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 3798 transitions. [2022-07-12 01:28:27,291 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 3798 transitions. Word has length 124 [2022-07-12 01:28:27,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:28:27,291 INFO L495 AbstractCegarLoop]: Abstraction has 2724 states and 3798 transitions. [2022-07-12 01:28:27,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 3798 transitions. [2022-07-12 01:28:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-12 01:28:27,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:27,294 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-12 01:28:27,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 01:28:27,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:27,295 INFO L85 PathProgramCache]: Analyzing trace with hash 527466105, now seen corresponding path program 1 times [2022-07-12 01:28:27,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:27,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179851061] [2022-07-12 01:28:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:27,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:28:27,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:27,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179851061] [2022-07-12 01:28:27,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179851061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:28:27,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:28:27,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 01:28:27,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912122351] [2022-07-12 01:28:27,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:28:27,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:28:27,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:28:27,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:28:27,370 INFO L87 Difference]: Start difference. First operand 2724 states and 3798 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:29,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:28:29,044 INFO L93 Difference]: Finished difference Result 8009 states and 11161 transitions. [2022-07-12 01:28:29,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:28:29,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2022-07-12 01:28:29,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:28:29,056 INFO L225 Difference]: With dead ends: 8009 [2022-07-12 01:28:29,057 INFO L226 Difference]: Without dead ends: 4428 [2022-07-12 01:28:29,061 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 [2022-07-12 01:28:29,066 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-12 01:28:29,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-12 01:28:29,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4428 states. [2022-07-12 01:28:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4428 to 4428. [2022-07-12 01:28:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4428 states, 4427 states have (on average 1.2071380167156087) internal successors, (5344), 4427 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4428 states to 4428 states and 5344 transitions. [2022-07-12 01:28:29,124 INFO L78 Accepts]: Start accepts. Automaton has 4428 states and 5344 transitions. Word has length 146 [2022-07-12 01:28:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:28:29,125 INFO L495 AbstractCegarLoop]: Abstraction has 4428 states and 5344 transitions. [2022-07-12 01:28:29,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4428 states and 5344 transitions. [2022-07-12 01:28:29,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-12 01:28:29,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:29,130 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:28:29,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 01:28:29,130 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:29,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:29,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2015197805, now seen corresponding path program 1 times [2022-07-12 01:28:29,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:29,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684606121] [2022-07-12 01:28:29,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:29,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:28:29,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:29,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684606121] [2022-07-12 01:28:29,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684606121] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:28:29,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:28:29,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:28:29,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24664591] [2022-07-12 01:28:29,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:28:29,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:28:29,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:29,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:28:29,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:28:29,272 INFO L87 Difference]: Start difference. First operand 4428 states and 5344 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:28:30,770 INFO L93 Difference]: Finished difference Result 10989 states and 13620 transitions. [2022-07-12 01:28:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:28:30,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2022-07-12 01:28:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:28:30,800 INFO L225 Difference]: With dead ends: 10989 [2022-07-12 01:28:30,800 INFO L226 Difference]: Without dead ends: 6563 [2022-07-12 01:28:30,805 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 [2022-07-12 01:28:30,805 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 01:28:30,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 801 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-12 01:28:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2022-07-12 01:28:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 6563. [2022-07-12 01:28:30,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6563 states, 6562 states have (on average 1.2025297165498323) internal successors, (7891), 6562 states have internal predecessors, (7891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6563 states to 6563 states and 7891 transitions. [2022-07-12 01:28:30,915 INFO L78 Accepts]: Start accepts. Automaton has 6563 states and 7891 transitions. Word has length 206 [2022-07-12 01:28:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:28:30,915 INFO L495 AbstractCegarLoop]: Abstraction has 6563 states and 7891 transitions. [2022-07-12 01:28:30,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 6563 states and 7891 transitions. [2022-07-12 01:28:30,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-12 01:28:30,917 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:30,917 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:28:30,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 01:28:30,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:30,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:30,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1777362264, now seen corresponding path program 1 times [2022-07-12 01:28:30,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:30,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447964664] [2022-07-12 01:28:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:30,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-12 01:28:30,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:30,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447964664] [2022-07-12 01:28:30,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447964664] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:28:30,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:28:30,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:28:30,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15228978] [2022-07-12 01:28:30,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:28:30,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:28:30,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:30,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:28:30,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:28:30,993 INFO L87 Difference]: Start difference. First operand 6563 states and 7891 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:32,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:28:32,662 INFO L93 Difference]: Finished difference Result 16521 states and 20210 transitions. [2022-07-12 01:28:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:28:32,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 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 208 [2022-07-12 01:28:32,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:28:32,692 INFO L225 Difference]: With dead ends: 16521 [2022-07-12 01:28:32,692 INFO L226 Difference]: Without dead ends: 9960 [2022-07-12 01:28:32,700 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 [2022-07-12 01:28:32,701 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 400 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-12 01:28:32,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 486 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-12 01:28:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9960 states. [2022-07-12 01:28:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9960 to 6961. [2022-07-12 01:28:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6961 states, 6960 states have (on average 1.1939655172413792) internal successors, (8310), 6960 states have internal predecessors, (8310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 8310 transitions. [2022-07-12 01:28:32,847 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 8310 transitions. Word has length 208 [2022-07-12 01:28:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:28:32,848 INFO L495 AbstractCegarLoop]: Abstraction has 6961 states and 8310 transitions. [2022-07-12 01:28:32,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:32,851 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 8310 transitions. [2022-07-12 01:28:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-12 01:28:32,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:32,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 01:28:32,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 01:28:32,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:32,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:32,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1928280324, now seen corresponding path program 1 times [2022-07-12 01:28:32,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:32,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959018681] [2022-07-12 01:28:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:32,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:28:32,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:32,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959018681] [2022-07-12 01:28:32,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959018681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:28:32,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:28:32,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:28:32,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829943400] [2022-07-12 01:28:32,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:28:32,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:28:32,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:32,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:28:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:28:32,958 INFO L87 Difference]: Start difference. First operand 6961 states and 8310 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:28:34,738 INFO L93 Difference]: Finished difference Result 17324 states and 21059 transitions. [2022-07-12 01:28:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:28:34,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 221 [2022-07-12 01:28:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:28:34,761 INFO L225 Difference]: With dead ends: 17324 [2022-07-12 01:28:34,762 INFO L226 Difference]: Without dead ends: 10365 [2022-07-12 01:28:34,769 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 [2022-07-12 01:28:34,770 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 424 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-12 01:28:34,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 452 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-12 01:28:34,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10365 states. [2022-07-12 01:28:34,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10365 to 9509. [2022-07-12 01:28:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9509 states, 9508 states have (on average 1.1959402608329828) internal successors, (11371), 9508 states have internal predecessors, (11371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9509 states to 9509 states and 11371 transitions. [2022-07-12 01:28:34,875 INFO L78 Accepts]: Start accepts. Automaton has 9509 states and 11371 transitions. Word has length 221 [2022-07-12 01:28:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:28:34,876 INFO L495 AbstractCegarLoop]: Abstraction has 9509 states and 11371 transitions. [2022-07-12 01:28:34,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 9509 states and 11371 transitions. [2022-07-12 01:28:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-12 01:28:34,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:34,878 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:28:34,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 01:28:34,879 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:34,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1694467582, now seen corresponding path program 1 times [2022-07-12 01:28:34,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:34,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039994012] [2022-07-12 01:28:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:34,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:28:34,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039994012] [2022-07-12 01:28:34,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039994012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:28:34,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:28:34,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:28:34,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504504375] [2022-07-12 01:28:34,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:28:34,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:28:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:34,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:28:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:28:34,955 INFO L87 Difference]: Start difference. First operand 9509 states and 11371 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:36,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:28:36,905 INFO L93 Difference]: Finished difference Result 25399 states and 30227 transitions. [2022-07-12 01:28:36,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:28:36,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-07-12 01:28:36,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:28:36,933 INFO L225 Difference]: With dead ends: 25399 [2022-07-12 01:28:36,933 INFO L226 Difference]: Without dead ends: 15892 [2022-07-12 01:28:36,942 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 [2022-07-12 01:28:36,943 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 485 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 01:28:36,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 282 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-12 01:28:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15892 states. [2022-07-12 01:28:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15892 to 14184. [2022-07-12 01:28:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14184 states, 14183 states have (on average 1.184587181837411) internal successors, (16801), 14183 states have internal predecessors, (16801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:37,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14184 states to 14184 states and 16801 transitions. [2022-07-12 01:28:37,090 INFO L78 Accepts]: Start accepts. Automaton has 14184 states and 16801 transitions. Word has length 253 [2022-07-12 01:28:37,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:28:37,090 INFO L495 AbstractCegarLoop]: Abstraction has 14184 states and 16801 transitions. [2022-07-12 01:28:37,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:37,091 INFO L276 IsEmpty]: Start isEmpty. Operand 14184 states and 16801 transitions. [2022-07-12 01:28:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-07-12 01:28:37,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:37,094 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:28:37,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 01:28:37,094 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:37,095 INFO L85 PathProgramCache]: Analyzing trace with hash 524926456, now seen corresponding path program 1 times [2022-07-12 01:28:37,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:37,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283779284] [2022-07-12 01:28:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:37,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:28:37,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283779284] [2022-07-12 01:28:37,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283779284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:28:37,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:28:37,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:28:37,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84594389] [2022-07-12 01:28:37,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:28:37,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:28:37,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:37,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:28:37,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:28:37,196 INFO L87 Difference]: Start difference. First operand 14184 states and 16801 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:28:39,089 INFO L93 Difference]: Finished difference Result 33921 states and 40606 transitions. [2022-07-12 01:28:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:28:39,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 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 270 [2022-07-12 01:28:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:28:39,123 INFO L225 Difference]: With dead ends: 33921 [2022-07-12 01:28:39,123 INFO L226 Difference]: Without dead ends: 19739 [2022-07-12 01:28:39,137 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 [2022-07-12 01:28:39,138 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 455 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 01:28:39,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 454 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-12 01:28:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19739 states. [2022-07-12 01:28:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19739 to 18029. [2022-07-12 01:28:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18029 states, 18028 states have (on average 1.2058464610605724) internal successors, (21739), 18028 states have internal predecessors, (21739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18029 states to 18029 states and 21739 transitions. [2022-07-12 01:28:39,319 INFO L78 Accepts]: Start accepts. Automaton has 18029 states and 21739 transitions. Word has length 270 [2022-07-12 01:28:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:28:39,320 INFO L495 AbstractCegarLoop]: Abstraction has 18029 states and 21739 transitions. [2022-07-12 01:28:39,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 18029 states and 21739 transitions. [2022-07-12 01:28:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-07-12 01:28:39,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:39,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-12 01:28:39,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 01:28:39,325 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:39,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:39,325 INFO L85 PathProgramCache]: Analyzing trace with hash 937950836, now seen corresponding path program 1 times [2022-07-12 01:28:39,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:39,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341885422] [2022-07-12 01:28:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:39,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 242 proven. 70 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-12 01:28:39,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:39,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341885422] [2022-07-12 01:28:39,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341885422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 01:28:39,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924726823] [2022-07-12 01:28:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:39,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 01:28:39,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 01:28:39,426 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) [2022-07-12 01:28:39,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 01:28:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:39,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 01:28:39,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 01:28:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 242 proven. 70 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-12 01:28:39,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 01:28:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-12 01:28:40,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924726823] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 01:28:40,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 01:28:40,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-12 01:28:40,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142752081] [2022-07-12 01:28:40,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:28:40,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 01:28:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 01:28:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-12 01:28:40,172 INFO L87 Difference]: Start difference. First operand 18029 states and 21739 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:28:43,476 INFO L93 Difference]: Finished difference Result 49692 states and 60242 transitions. [2022-07-12 01:28:43,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 01:28:43,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 278 [2022-07-12 01:28:43,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:28:43,521 INFO L225 Difference]: With dead ends: 49692 [2022-07-12 01:28:43,522 INFO L226 Difference]: Without dead ends: 30794 [2022-07-12 01:28:43,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 551 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-12 01:28:43,535 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 1070 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 1224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 3489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1224 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-12 01:28:43,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1070 Valid, 140 Invalid, 3489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1224 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-12 01:28:43,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30794 states. [2022-07-12 01:28:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30794 to 30367. [2022-07-12 01:28:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30367 states, 30366 states have (on average 1.168938944872555) internal successors, (35496), 30366 states have internal predecessors, (35496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30367 states to 30367 states and 35496 transitions. [2022-07-12 01:28:43,861 INFO L78 Accepts]: Start accepts. Automaton has 30367 states and 35496 transitions. Word has length 278 [2022-07-12 01:28:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:28:43,862 INFO L495 AbstractCegarLoop]: Abstraction has 30367 states and 35496 transitions. [2022-07-12 01:28:43,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 30367 states and 35496 transitions. [2022-07-12 01:28:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-12 01:28:43,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:43,865 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:28:43,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 01:28:44,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 01:28:44,079 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:44,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:44,080 INFO L85 PathProgramCache]: Analyzing trace with hash -595718805, now seen corresponding path program 1 times [2022-07-12 01:28:44,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:44,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421188812] [2022-07-12 01:28:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:44,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-12 01:28:44,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:44,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421188812] [2022-07-12 01:28:44,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421188812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:28:44,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:28:44,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:28:44,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332178027] [2022-07-12 01:28:44,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:28:44,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:28:44,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:28:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:28:44,175 INFO L87 Difference]: Start difference. First operand 30367 states and 35496 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:28:46,270 INFO L93 Difference]: Finished difference Result 76489 states and 89023 transitions. [2022-07-12 01:28:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:28:46,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 286 [2022-07-12 01:28:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:28:46,317 INFO L225 Difference]: With dead ends: 76489 [2022-07-12 01:28:46,317 INFO L226 Difference]: Without dead ends: 44416 [2022-07-12 01:28:46,337 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 [2022-07-12 01:28:46,338 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 482 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-12 01:28:46,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 611 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-12 01:28:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44416 states. [2022-07-12 01:28:46,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44416 to 39725. [2022-07-12 01:28:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39725 states, 39724 states have (on average 1.1442956399154163) internal successors, (45456), 39724 states have internal predecessors, (45456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39725 states to 39725 states and 45456 transitions. [2022-07-12 01:28:46,950 INFO L78 Accepts]: Start accepts. Automaton has 39725 states and 45456 transitions. Word has length 286 [2022-07-12 01:28:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:28:46,950 INFO L495 AbstractCegarLoop]: Abstraction has 39725 states and 45456 transitions. [2022-07-12 01:28:46,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:46,951 INFO L276 IsEmpty]: Start isEmpty. Operand 39725 states and 45456 transitions. [2022-07-12 01:28:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-07-12 01:28:46,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:46,954 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:28:46,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 01:28:46,955 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:46,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2036376936, now seen corresponding path program 1 times [2022-07-12 01:28:46,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:46,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21719511] [2022-07-12 01:28:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:46,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-12 01:28:47,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:47,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21719511] [2022-07-12 01:28:47,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21719511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:28:47,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:28:47,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:28:47,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133628871] [2022-07-12 01:28:47,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:28:47,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:28:47,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:47,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:28:47,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:28:47,036 INFO L87 Difference]: Start difference. First operand 39725 states and 45456 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:48,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:28:48,685 INFO L93 Difference]: Finished difference Result 84968 states and 97499 transitions. [2022-07-12 01:28:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:28:48,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 291 [2022-07-12 01:28:48,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:28:48,742 INFO L225 Difference]: With dead ends: 84968 [2022-07-12 01:28:48,743 INFO L226 Difference]: Without dead ends: 45245 [2022-07-12 01:28:48,755 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 [2022-07-12 01:28:48,755 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 372 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 01:28:48,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 826 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-12 01:28:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45245 states. [2022-07-12 01:28:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45245 to 44820. [2022-07-12 01:28:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44820 states, 44819 states have (on average 1.1323099578303844) internal successors, (50749), 44819 states have internal predecessors, (50749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:49,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44820 states to 44820 states and 50749 transitions. [2022-07-12 01:28:49,289 INFO L78 Accepts]: Start accepts. Automaton has 44820 states and 50749 transitions. Word has length 291 [2022-07-12 01:28:49,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:28:49,289 INFO L495 AbstractCegarLoop]: Abstraction has 44820 states and 50749 transitions. [2022-07-12 01:28:49,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:49,289 INFO L276 IsEmpty]: Start isEmpty. Operand 44820 states and 50749 transitions. [2022-07-12 01:28:49,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-07-12 01:28:49,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:49,293 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:28:49,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 01:28:49,293 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:49,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash 308755155, now seen corresponding path program 1 times [2022-07-12 01:28:49,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:49,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721757972] [2022-07-12 01:28:49,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:49,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:28:49,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:49,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721757972] [2022-07-12 01:28:49,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721757972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:28:49,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:28:49,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 01:28:49,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791438022] [2022-07-12 01:28:49,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:28:49,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 01:28:49,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:49,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 01:28:49,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 01:28:49,379 INFO L87 Difference]: Start difference. First operand 44820 states and 50749 transitions. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:52,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:28:52,435 INFO L93 Difference]: Finished difference Result 117359 states and 132890 transitions. [2022-07-12 01:28:52,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 01:28:52,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 314 [2022-07-12 01:28:52,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:28:52,512 INFO L225 Difference]: With dead ends: 117359 [2022-07-12 01:28:52,512 INFO L226 Difference]: Without dead ends: 70840 [2022-07-12 01:28:52,542 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 [2022-07-12 01:28:52,543 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 844 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-12 01:28:52,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 324 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 2692 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-12 01:28:52,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70840 states. [2022-07-12 01:28:53,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70840 to 69511. [2022-07-12 01:28:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69511 states, 69510 states have (on average 1.1229894979139692) internal successors, (78059), 69510 states have internal predecessors, (78059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:53,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69511 states to 69511 states and 78059 transitions. [2022-07-12 01:28:53,332 INFO L78 Accepts]: Start accepts. Automaton has 69511 states and 78059 transitions. Word has length 314 [2022-07-12 01:28:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:28:53,333 INFO L495 AbstractCegarLoop]: Abstraction has 69511 states and 78059 transitions. [2022-07-12 01:28:53,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 69511 states and 78059 transitions. [2022-07-12 01:28:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-07-12 01:28:53,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:53,338 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:28:53,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 01:28:53,338 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:53,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1085335230, now seen corresponding path program 1 times [2022-07-12 01:28:53,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:53,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028021518] [2022-07-12 01:28:53,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:53,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-12 01:28:53,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:53,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028021518] [2022-07-12 01:28:53,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028021518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:28:53,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:28:53,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:28:53,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344707831] [2022-07-12 01:28:53,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:28:53,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:28:53,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:53,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:28:53,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:28:53,437 INFO L87 Difference]: Start difference. First operand 69511 states and 78059 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:28:55,345 INFO L93 Difference]: Finished difference Result 149691 states and 168126 transitions. [2022-07-12 01:28:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:28:55,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 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 329 [2022-07-12 01:28:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:28:55,454 INFO L225 Difference]: With dead ends: 149691 [2022-07-12 01:28:55,454 INFO L226 Difference]: Without dead ends: 80182 [2022-07-12 01:28:55,502 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 [2022-07-12 01:28:55,504 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 365 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 01:28:55,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 769 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-12 01:28:55,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80182 states. [2022-07-12 01:28:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80182 to 79319. [2022-07-12 01:28:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79319 states, 79318 states have (on average 1.1088781865402557) internal successors, (87954), 79318 states have internal predecessors, (87954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79319 states to 79319 states and 87954 transitions. [2022-07-12 01:28:56,509 INFO L78 Accepts]: Start accepts. Automaton has 79319 states and 87954 transitions. Word has length 329 [2022-07-12 01:28:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:28:56,510 INFO L495 AbstractCegarLoop]: Abstraction has 79319 states and 87954 transitions. [2022-07-12 01:28:56,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:28:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 79319 states and 87954 transitions. [2022-07-12 01:28:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-07-12 01:28:56,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:28:56,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:28:56,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 01:28:56,514 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:28:56,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:28:56,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1319027679, now seen corresponding path program 1 times [2022-07-12 01:28:56,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:28:56,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545255664] [2022-07-12 01:28:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:56,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:28:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:28:56,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:28:56,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545255664] [2022-07-12 01:28:56,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545255664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 01:28:56,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309634810] [2022-07-12 01:28:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:28:56,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 01:28:56,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 01:28:56,616 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) [2022-07-12 01:28:56,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 01:28:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:28:56,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 01:28:56,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 01:28:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:28:57,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 01:28:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 01:28:58,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309634810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 01:28:58,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 01:28:58,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-07-12 01:28:58,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730631090] [2022-07-12 01:28:58,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 01:28:58,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 01:28:58,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:28:58,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 01:28:58,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 01:28:58,532 INFO L87 Difference]: Start difference. First operand 79319 states and 87954 transitions. Second operand has 7 states, 7 states have (on average 104.71428571428571) internal successors, (733), 6 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:29:06,968 INFO L93 Difference]: Finished difference Result 195340 states and 215638 transitions. [2022-07-12 01:29:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 01:29:06,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 104.71428571428571) internal successors, (733), 6 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 340 [2022-07-12 01:29:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:29:07,102 INFO L225 Difference]: With dead ends: 195340 [2022-07-12 01:29:07,102 INFO L226 Difference]: Without dead ends: 113465 [2022-07-12 01:29:07,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 676 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-12 01:29:07,131 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 1442 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 9263 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 10112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 9263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-07-12 01:29:07,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1442 Valid, 350 Invalid, 10112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 9263 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-07-12 01:29:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113465 states. [2022-07-12 01:29:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113465 to 97183. [2022-07-12 01:29:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97183 states, 97182 states have (on average 1.0952851351073245) internal successors, (106442), 97182 states have internal predecessors, (106442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:08,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97183 states to 97183 states and 106442 transitions. [2022-07-12 01:29:08,351 INFO L78 Accepts]: Start accepts. Automaton has 97183 states and 106442 transitions. Word has length 340 [2022-07-12 01:29:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:29:08,351 INFO L495 AbstractCegarLoop]: Abstraction has 97183 states and 106442 transitions. [2022-07-12 01:29:08,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.71428571428571) internal successors, (733), 6 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:08,351 INFO L276 IsEmpty]: Start isEmpty. Operand 97183 states and 106442 transitions. [2022-07-12 01:29:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-07-12 01:29:08,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:29:08,356 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:29:08,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 01:29:08,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 01:29:08,564 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:29:08,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:29:08,564 INFO L85 PathProgramCache]: Analyzing trace with hash -64556604, now seen corresponding path program 1 times [2022-07-12 01:29:08,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:29:08,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614661517] [2022-07-12 01:29:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:29:08,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:29:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:29:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-07-12 01:29:08,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:29:08,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614661517] [2022-07-12 01:29:08,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614661517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:29:08,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:29:08,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:29:08,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980275716] [2022-07-12 01:29:08,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:29:08,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:29:08,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:29:08,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:29:08,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:29:08,697 INFO L87 Difference]: Start difference. First operand 97183 states and 106442 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:29:10,562 INFO L93 Difference]: Finished difference Result 199051 states and 218123 transitions. [2022-07-12 01:29:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:29:10,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 382 [2022-07-12 01:29:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:29:10,680 INFO L225 Difference]: With dead ends: 199051 [2022-07-12 01:29:10,680 INFO L226 Difference]: Without dead ends: 102295 [2022-07-12 01:29:10,736 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 [2022-07-12 01:29:10,737 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 405 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 01:29:10,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 729 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-12 01:29:10,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102295 states. [2022-07-12 01:29:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102295 to 89928. [2022-07-12 01:29:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89928 states, 89927 states have (on average 1.093965105029635) internal successors, (98377), 89927 states have internal predecessors, (98377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89928 states to 89928 states and 98377 transitions. [2022-07-12 01:29:11,851 INFO L78 Accepts]: Start accepts. Automaton has 89928 states and 98377 transitions. Word has length 382 [2022-07-12 01:29:11,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:29:11,852 INFO L495 AbstractCegarLoop]: Abstraction has 89928 states and 98377 transitions. [2022-07-12 01:29:11,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:11,852 INFO L276 IsEmpty]: Start isEmpty. Operand 89928 states and 98377 transitions. [2022-07-12 01:29:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-07-12 01:29:11,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:29:11,859 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:29:11,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 01:29:11,859 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:29:11,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:29:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash -943368672, now seen corresponding path program 1 times [2022-07-12 01:29:11,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:29:11,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45544856] [2022-07-12 01:29:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:29:11,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:29:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:29:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-07-12 01:29:12,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:29:12,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45544856] [2022-07-12 01:29:12,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45544856] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:29:12,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:29:12,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 01:29:12,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731957571] [2022-07-12 01:29:12,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:29:12,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:29:12,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:29:12,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:29:12,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:29:12,184 INFO L87 Difference]: Start difference. First operand 89928 states and 98377 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:29:13,462 INFO L93 Difference]: Finished difference Result 177716 states and 194414 transitions. [2022-07-12 01:29:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:29:13,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 433 [2022-07-12 01:29:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:29:13,559 INFO L225 Difference]: With dead ends: 177716 [2022-07-12 01:29:13,560 INFO L226 Difference]: Without dead ends: 88214 [2022-07-12 01:29:13,602 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 [2022-07-12 01:29:13,603 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 616 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 01:29:13,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 95 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 01:29:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88214 states. [2022-07-12 01:29:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88214 to 88205. [2022-07-12 01:29:14,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88205 states, 88204 states have (on average 1.0933291007210557) internal successors, (96436), 88204 states have internal predecessors, (96436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88205 states to 88205 states and 96436 transitions. [2022-07-12 01:29:14,652 INFO L78 Accepts]: Start accepts. Automaton has 88205 states and 96436 transitions. Word has length 433 [2022-07-12 01:29:14,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:29:14,653 INFO L495 AbstractCegarLoop]: Abstraction has 88205 states and 96436 transitions. [2022-07-12 01:29:14,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 88205 states and 96436 transitions. [2022-07-12 01:29:14,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-07-12 01:29:14,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:29:14,659 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 01:29:14,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 01:29:14,660 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:29:14,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:29:14,660 INFO L85 PathProgramCache]: Analyzing trace with hash 340482704, now seen corresponding path program 1 times [2022-07-12 01:29:14,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:29:14,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581036472] [2022-07-12 01:29:14,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:29:14,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:29:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:29:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 370 proven. 52 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-12 01:29:14,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:29:14,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581036472] [2022-07-12 01:29:14,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581036472] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 01:29:14,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031299588] [2022-07-12 01:29:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:29:14,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 01:29:14,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 01:29:14,973 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) [2022-07-12 01:29:14,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 01:29:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:29:15,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 01:29:15,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 01:29:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 433 proven. 82 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-07-12 01:29:15,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 01:29:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 433 proven. 82 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-07-12 01:29:16,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031299588] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 01:29:16,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 01:29:16,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-07-12 01:29:16,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713848801] [2022-07-12 01:29:16,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 01:29:16,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 01:29:16,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:29:16,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 01:29:16,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-12 01:29:16,104 INFO L87 Difference]: Start difference. First operand 88205 states and 96436 transitions. Second operand has 9 states, 9 states have (on average 83.22222222222223) internal successors, (749), 9 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:29:24,822 INFO L93 Difference]: Finished difference Result 205396 states and 223800 transitions. [2022-07-12 01:29:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 01:29:24,822 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 83.22222222222223) internal successors, (749), 9 states have internal predecessors, (749), 0 states have call successors, (0), 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 434 [2022-07-12 01:29:24,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:29:24,966 INFO L225 Difference]: With dead ends: 205396 [2022-07-12 01:29:24,966 INFO L226 Difference]: Without dead ends: 115916 [2022-07-12 01:29:25,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 872 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2022-07-12 01:29:25,002 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 7848 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 8377 mSolverCounterSat, 1961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7848 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 10338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1961 IncrementalHoareTripleChecker+Valid, 8377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-07-12 01:29:25,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7848 Valid, 247 Invalid, 10338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1961 Valid, 8377 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-07-12 01:29:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115916 states. [2022-07-12 01:29:26,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115916 to 92851. [2022-07-12 01:29:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92851 states, 92850 states have (on average 1.0784383414108778) internal successors, (100133), 92850 states have internal predecessors, (100133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:26,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92851 states to 92851 states and 100133 transitions. [2022-07-12 01:29:26,199 INFO L78 Accepts]: Start accepts. Automaton has 92851 states and 100133 transitions. Word has length 434 [2022-07-12 01:29:26,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:29:26,199 INFO L495 AbstractCegarLoop]: Abstraction has 92851 states and 100133 transitions. [2022-07-12 01:29:26,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 83.22222222222223) internal successors, (749), 9 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 92851 states and 100133 transitions. [2022-07-12 01:29:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-07-12 01:29:26,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:29:26,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:29:26,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 01:29:26,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 01:29:26,413 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:29:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:29:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1231120753, now seen corresponding path program 1 times [2022-07-12 01:29:26,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:29:26,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565141444] [2022-07-12 01:29:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:29:26,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:29:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:29:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:29:26,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:29:26,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565141444] [2022-07-12 01:29:26,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565141444] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:29:26,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:29:26,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:29:26,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709210856] [2022-07-12 01:29:26,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:29:26,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:29:26,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:29:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:29:26,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:29:26,534 INFO L87 Difference]: Start difference. First operand 92851 states and 100133 transitions. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:29:28,225 INFO L93 Difference]: Finished difference Result 182718 states and 197123 transitions. [2022-07-12 01:29:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:29:28,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2022-07-12 01:29:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:29:28,326 INFO L225 Difference]: With dead ends: 182718 [2022-07-12 01:29:28,326 INFO L226 Difference]: Without dead ends: 90294 [2022-07-12 01:29:28,375 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 [2022-07-12 01:29:28,376 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 430 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 01:29:28,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 687 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 01:29:28,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90294 states. [2022-07-12 01:29:29,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90294 to 86891. [2022-07-12 01:29:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86891 states, 86890 states have (on average 1.0687651053055587) internal successors, (92865), 86890 states have internal predecessors, (92865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86891 states to 86891 states and 92865 transitions. [2022-07-12 01:29:29,570 INFO L78 Accepts]: Start accepts. Automaton has 86891 states and 92865 transitions. Word has length 453 [2022-07-12 01:29:29,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:29:29,571 INFO L495 AbstractCegarLoop]: Abstraction has 86891 states and 92865 transitions. [2022-07-12 01:29:29,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 86891 states and 92865 transitions. [2022-07-12 01:29:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2022-07-12 01:29:29,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:29:29,580 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-07-12 01:29:29,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 01:29:29,581 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:29:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:29:29,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1574299630, now seen corresponding path program 1 times [2022-07-12 01:29:29,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:29:29,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333170838] [2022-07-12 01:29:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:29:29,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:29:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:29:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 422 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-12 01:29:29,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:29:29,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333170838] [2022-07-12 01:29:29,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333170838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:29:29,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:29:29,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 01:29:29,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728913407] [2022-07-12 01:29:29,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:29:29,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 01:29:29,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:29:29,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 01:29:29,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 01:29:29,758 INFO L87 Difference]: Start difference. First operand 86891 states and 92865 transitions. Second operand has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:29:32,873 INFO L93 Difference]: Finished difference Result 193390 states and 206297 transitions. [2022-07-12 01:29:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 01:29:32,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 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 469 [2022-07-12 01:29:32,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:29:32,997 INFO L225 Difference]: With dead ends: 193390 [2022-07-12 01:29:32,997 INFO L226 Difference]: Without dead ends: 105649 [2022-07-12 01:29:33,035 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 [2022-07-12 01:29:33,036 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 831 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-12 01:29:33,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 174 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-12 01:29:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105649 states. [2022-07-12 01:29:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105649 to 95397. [2022-07-12 01:29:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95397 states, 95396 states have (on average 1.0677177240135856) internal successors, (101856), 95396 states have internal predecessors, (101856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95397 states to 95397 states and 101856 transitions. [2022-07-12 01:29:34,168 INFO L78 Accepts]: Start accepts. Automaton has 95397 states and 101856 transitions. Word has length 469 [2022-07-12 01:29:34,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:29:34,168 INFO L495 AbstractCegarLoop]: Abstraction has 95397 states and 101856 transitions. [2022-07-12 01:29:34,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:34,168 INFO L276 IsEmpty]: Start isEmpty. Operand 95397 states and 101856 transitions. [2022-07-12 01:29:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2022-07-12 01:29:34,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:29:34,181 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:29:34,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 01:29:34,181 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:29:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:29:34,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1481735140, now seen corresponding path program 1 times [2022-07-12 01:29:34,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:29:34,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145062767] [2022-07-12 01:29:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:29:34,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:29:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:29:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 394 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-12 01:29:34,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:29:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145062767] [2022-07-12 01:29:34,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145062767] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:29:34,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:29:34,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:29:34,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752033416] [2022-07-12 01:29:34,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:29:34,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:29:34,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:29:34,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:29:34,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:29:34,320 INFO L87 Difference]: Start difference. First operand 95397 states and 101856 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) [2022-07-12 01:29:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:29:36,170 INFO L93 Difference]: Finished difference Result 197175 states and 210401 transitions. [2022-07-12 01:29:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 01:29:36,179 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 538 [2022-07-12 01:29:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:29:36,301 INFO L225 Difference]: With dead ends: 197175 [2022-07-12 01:29:36,302 INFO L226 Difference]: Without dead ends: 102205 [2022-07-12 01:29:36,356 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 [2022-07-12 01:29:36,357 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 490 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-12 01:29:36,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 663 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-12 01:29:36,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102205 states. [2022-07-12 01:29:37,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102205 to 101348. [2022-07-12 01:29:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101348 states, 101347 states have (on average 1.0620541308573515) internal successors, (107636), 101347 states have internal predecessors, (107636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101348 states to 101348 states and 107636 transitions. [2022-07-12 01:29:37,744 INFO L78 Accepts]: Start accepts. Automaton has 101348 states and 107636 transitions. Word has length 538 [2022-07-12 01:29:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:29:37,744 INFO L495 AbstractCegarLoop]: Abstraction has 101348 states and 107636 transitions. [2022-07-12 01:29:37,744 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) [2022-07-12 01:29:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 101348 states and 107636 transitions. [2022-07-12 01:29:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2022-07-12 01:29:37,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:29:37,755 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:29:37,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 01:29:37,756 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:29:37,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:29:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2113387943, now seen corresponding path program 1 times [2022-07-12 01:29:37,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:29:37,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970355938] [2022-07-12 01:29:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:29:37,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:29:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:29:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:29:38,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:29:38,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970355938] [2022-07-12 01:29:38,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970355938] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:29:38,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:29:38,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 01:29:38,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302172209] [2022-07-12 01:29:38,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:29:38,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 01:29:38,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:29:38,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 01:29:38,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 01:29:38,121 INFO L87 Difference]: Start difference. First operand 101348 states and 107636 transitions. Second operand has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:29:40,868 INFO L93 Difference]: Finished difference Result 226129 states and 240292 transitions. [2022-07-12 01:29:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 01:29:40,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 541 [2022-07-12 01:29:40,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:29:41,025 INFO L225 Difference]: With dead ends: 226129 [2022-07-12 01:29:41,025 INFO L226 Difference]: Without dead ends: 124783 [2022-07-12 01:29:41,081 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 [2022-07-12 01:29:41,081 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 832 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-12 01:29:41,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 198 Invalid, 2696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-12 01:29:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124783 states. [2022-07-12 01:29:42,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124783 to 113720. [2022-07-12 01:29:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113720 states, 113719 states have (on average 1.0559976784882035) internal successors, (120087), 113719 states have internal predecessors, (120087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113720 states to 113720 states and 120087 transitions. [2022-07-12 01:29:42,699 INFO L78 Accepts]: Start accepts. Automaton has 113720 states and 120087 transitions. Word has length 541 [2022-07-12 01:29:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:29:42,699 INFO L495 AbstractCegarLoop]: Abstraction has 113720 states and 120087 transitions. [2022-07-12 01:29:42,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:42,700 INFO L276 IsEmpty]: Start isEmpty. Operand 113720 states and 120087 transitions. [2022-07-12 01:29:42,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2022-07-12 01:29:42,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:29:42,709 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:29:42,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 01:29:42,709 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:29:42,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:29:42,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1918381843, now seen corresponding path program 1 times [2022-07-12 01:29:42,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:29:42,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95134726] [2022-07-12 01:29:42,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:29:42,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:29:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:29:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:29:43,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:29:43,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95134726] [2022-07-12 01:29:43,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95134726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:29:43,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:29:43,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 01:29:43,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693451160] [2022-07-12 01:29:43,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:29:43,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 01:29:43,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:29:43,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 01:29:43,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 01:29:43,109 INFO L87 Difference]: Start difference. First operand 113720 states and 120087 transitions. Second operand has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:29:45,865 INFO L93 Difference]: Finished difference Result 127796 states and 134701 transitions. [2022-07-12 01:29:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 01:29:45,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 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 544 [2022-07-12 01:29:45,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:29:46,009 INFO L225 Difference]: With dead ends: 127796 [2022-07-12 01:29:46,009 INFO L226 Difference]: Without dead ends: 127369 [2022-07-12 01:29:46,037 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 [2022-07-12 01:29:46,038 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 825 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-12 01:29:46,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 184 Invalid, 2777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 2441 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-12 01:29:46,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127369 states. [2022-07-12 01:29:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127369 to 114145. [2022-07-12 01:29:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114145 states, 114144 states have (on average 1.05602572189515) internal successors, (120539), 114144 states have internal predecessors, (120539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114145 states to 114145 states and 120539 transitions. [2022-07-12 01:29:47,686 INFO L78 Accepts]: Start accepts. Automaton has 114145 states and 120539 transitions. Word has length 544 [2022-07-12 01:29:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:29:47,686 INFO L495 AbstractCegarLoop]: Abstraction has 114145 states and 120539 transitions. [2022-07-12 01:29:47,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 114145 states and 120539 transitions. [2022-07-12 01:29:47,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2022-07-12 01:29:47,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:29:47,695 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:29:47,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-12 01:29:47,696 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:29:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:29:47,696 INFO L85 PathProgramCache]: Analyzing trace with hash 318392728, now seen corresponding path program 1 times [2022-07-12 01:29:47,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:29:47,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746227069] [2022-07-12 01:29:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:29:47,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:29:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:29:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 01:29:47,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:29:47,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746227069] [2022-07-12 01:29:47,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746227069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:29:47,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:29:47,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 01:29:47,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023367747] [2022-07-12 01:29:47,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:29:47,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 01:29:47,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:29:47,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 01:29:47,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-12 01:29:47,896 INFO L87 Difference]: Start difference. First operand 114145 states and 120539 transitions. Second operand has 5 states, 5 states have (on average 95.2) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 01:29:50,183 INFO L93 Difference]: Finished difference Result 122698 states and 129431 transitions. [2022-07-12 01:29:50,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 01:29:50,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 95.2) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 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 557 [2022-07-12 01:29:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 01:29:50,313 INFO L225 Difference]: With dead ends: 122698 [2022-07-12 01:29:50,313 INFO L226 Difference]: Without dead ends: 122244 [2022-07-12 01:29:50,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-12 01:29:50,339 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 913 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1982 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 1982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 01:29:50,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 120 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 1982 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-12 01:29:50,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122244 states. [2022-07-12 01:29:51,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122244 to 113720. [2022-07-12 01:29:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113720 states, 113719 states have (on average 1.0560240593040742) internal successors, (120090), 113719 states have internal predecessors, (120090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113720 states to 113720 states and 120090 transitions. [2022-07-12 01:29:51,961 INFO L78 Accepts]: Start accepts. Automaton has 113720 states and 120090 transitions. Word has length 557 [2022-07-12 01:29:51,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 01:29:51,962 INFO L495 AbstractCegarLoop]: Abstraction has 113720 states and 120090 transitions. [2022-07-12 01:29:51,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.2) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 01:29:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand 113720 states and 120090 transitions. [2022-07-12 01:29:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2022-07-12 01:29:51,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 01:29:51,976 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 01:29:51,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-12 01:29:51,977 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 01:29:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 01:29:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2096212056, now seen corresponding path program 1 times [2022-07-12 01:29:51,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 01:29:51,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91282232] [2022-07-12 01:29:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 01:29:51,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 01:29:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 01:29:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-12 01:29:52,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 01:29:52,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91282232] [2022-07-12 01:29:52,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91282232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 01:29:52,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 01:29:52,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 01:29:52,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44646276] [2022-07-12 01:29:52,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 01:29:52,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 01:29:52,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 01:29:52,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 01:29:52,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 01:29:52,150 INFO L87 Difference]: Start difference. First operand 113720 states and 120090 transitions. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)