./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/Problem15_label05.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 63eefb43987dda8e1668da6021cabb64b22b4f62f3f84321ab9d4efedc35c362 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:27:14,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:27:14,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:27:14,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:27:14,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:27:14,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:27:14,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:27:14,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:27:14,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:27:14,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:27:14,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:27:14,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:27:14,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:27:14,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:27:14,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:27:14,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:27:14,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:27:14,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:27:14,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:27:14,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:27:14,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:27:14,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:27:14,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:27:14,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:27:14,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:27:14,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:27:14,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:27:14,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:27:14,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:27:14,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:27:14,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:27:14,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:27:14,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:27:14,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:27:14,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:27:14,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:27:14,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:27:14,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:27:14,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:27:14,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:27:14,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:27:14,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:27:14,325 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:27:14,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:27:14,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:27:14,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:27:14,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:27:14,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:27:14,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:27:14,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:27:14,328 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:27:14,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:27:14,329 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:27:14,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:27:14,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:27:14,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:27:14,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:27:14,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:27:14,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:27:14,330 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:27:14,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:27:14,330 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:27:14,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:27:14,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:27:14,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:27:14,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:27:14,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:27:14,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:27:14,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:27:14,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:27:14,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:27:14,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:27:14,333 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:27:14,333 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:27:14,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:27:14,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:27:14,334 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63eefb43987dda8e1668da6021cabb64b22b4f62f3f84321ab9d4efedc35c362 [2021-12-22 09:27:14,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:27:14,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:27:14,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:27:14,626 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:27:14,627 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:27:14,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label05.c [2021-12-22 09:27:14,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/752e14d58/86ef3de1ef0e41229c73a0482cf288c9/FLAG4373e3211 [2021-12-22 09:27:15,154 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:27:15,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label05.c [2021-12-22 09:27:15,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/752e14d58/86ef3de1ef0e41229c73a0482cf288c9/FLAG4373e3211 [2021-12-22 09:27:15,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/752e14d58/86ef3de1ef0e41229c73a0482cf288c9 [2021-12-22 09:27:15,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:27:15,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:27:15,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:27:15,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:27:15,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:27:15,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:27:15" (1/1) ... [2021-12-22 09:27:15,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28d5b3d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:15, skipping insertion in model container [2021-12-22 09:27:15,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:27:15" (1/1) ... [2021-12-22 09:27:15,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:27:15,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:27:15,764 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/Problem15_label05.c[7777,7790] [2021-12-22 09:27:16,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:27:16,143 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:27:16,191 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/Problem15_label05.c[7777,7790] [2021-12-22 09:27:16,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:27:16,365 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:27:16,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:16 WrapperNode [2021-12-22 09:27:16,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:27:16,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:27:16,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:27:16,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:27:16,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:16" (1/1) ... [2021-12-22 09:27:16,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:16" (1/1) ... [2021-12-22 09:27:16,571 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-22 09:27:16,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:27:16,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:27:16,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:27:16,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:27:16,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:16" (1/1) ... [2021-12-22 09:27:16,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:16" (1/1) ... [2021-12-22 09:27:16,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:16" (1/1) ... [2021-12-22 09:27:16,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:16" (1/1) ... [2021-12-22 09:27:16,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:16" (1/1) ... [2021-12-22 09:27:16,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:16" (1/1) ... [2021-12-22 09:27:16,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:16" (1/1) ... [2021-12-22 09:27:16,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:27:16,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:27:16,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:27:16,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:27:16,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:16" (1/1) ... [2021-12-22 09:27:16,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:27:16,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:16,836 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) [2021-12-22 09:27:16,859 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 [2021-12-22 09:27:16,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:27:16,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:27:16,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:27:16,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:27:16,938 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:27:16,940 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:27:19,264 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:27:19,281 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:27:19,281 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:27:19,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:27:19 BoogieIcfgContainer [2021-12-22 09:27:19,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:27:19,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:27:19,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:27:19,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:27:19,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:27:15" (1/3) ... [2021-12-22 09:27:19,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255f286c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:27:19, skipping insertion in model container [2021-12-22 09:27:19,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:16" (2/3) ... [2021-12-22 09:27:19,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255f286c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:27:19, skipping insertion in model container [2021-12-22 09:27:19,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:27:19" (3/3) ... [2021-12-22 09:27:19,293 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label05.c [2021-12-22 09:27:19,301 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:27:19,301 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:27:19,355 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:27:19,360 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 09:27:19,361 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:27:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:19,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 09:27:19,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:19,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:19,387 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:19,391 INFO L85 PathProgramCache]: Analyzing trace with hash -107486446, now seen corresponding path program 1 times [2021-12-22 09:27:19,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:19,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189818591] [2021-12-22 09:27:19,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:19,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:19,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189818591] [2021-12-22 09:27:19,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189818591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:19,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:19,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:19,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950195340] [2021-12-22 09:27:19,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:19,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:19,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:19,666 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:21,476 INFO L93 Difference]: Finished difference Result 1155 states and 2106 transitions. [2021-12-22 09:27:21,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:21,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-22 09:27:21,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:21,492 INFO L225 Difference]: With dead ends: 1155 [2021-12-22 09:27:21,492 INFO L226 Difference]: Without dead ends: 667 [2021-12-22 09:27:21,497 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:27:21,500 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 280 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:21,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 371 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-22 09:27:21,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-12-22 09:27:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 665. [2021-12-22 09:27:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.4789156626506024) internal successors, (982), 664 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 982 transitions. [2021-12-22 09:27:21,568 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 982 transitions. Word has length 64 [2021-12-22 09:27:21,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:21,569 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 982 transitions. [2021-12-22 09:27:21,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:21,569 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 982 transitions. [2021-12-22 09:27:21,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-22 09:27:21,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:21,574 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-22 09:27:21,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:27:21,574 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:21,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1499116755, now seen corresponding path program 1 times [2021-12-22 09:27:21,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:21,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824917388] [2021-12-22 09:27:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:21,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:21,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:21,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824917388] [2021-12-22 09:27:21,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824917388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:21,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:21,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:21,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696156863] [2021-12-22 09:27:21,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:21,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:21,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:21,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:21,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:21,735 INFO L87 Difference]: Start difference. First operand 665 states and 982 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 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) [2021-12-22 09:27:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:23,690 INFO L93 Difference]: Finished difference Result 1953 states and 2893 transitions. [2021-12-22 09:27:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:23,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 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 139 [2021-12-22 09:27:23,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:23,697 INFO L225 Difference]: With dead ends: 1953 [2021-12-22 09:27:23,697 INFO L226 Difference]: Without dead ends: 1290 [2021-12-22 09:27:23,700 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:27:23,701 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 256 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:23,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 326 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 09:27:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-12-22 09:27:23,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1282. [2021-12-22 09:27:23,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 1.3981264637002342) internal successors, (1791), 1281 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1791 transitions. [2021-12-22 09:27:23,740 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1791 transitions. Word has length 139 [2021-12-22 09:27:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:23,741 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1791 transitions. [2021-12-22 09:27:23,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 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) [2021-12-22 09:27:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1791 transitions. [2021-12-22 09:27:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-22 09:27:23,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:23,746 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-22 09:27:23,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:27:23,747 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:23,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1491517981, now seen corresponding path program 1 times [2021-12-22 09:27:23,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:23,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845377461] [2021-12-22 09:27:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:23,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:23,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:23,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845377461] [2021-12-22 09:27:23,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845377461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:23,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:23,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:23,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949730967] [2021-12-22 09:27:23,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:23,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:23,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:23,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:23,866 INFO L87 Difference]: Start difference. First operand 1282 states and 1791 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:25,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:25,712 INFO L93 Difference]: Finished difference Result 3764 states and 5260 transitions. [2021-12-22 09:27:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:25,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2021-12-22 09:27:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:25,723 INFO L225 Difference]: With dead ends: 3764 [2021-12-22 09:27:25,723 INFO L226 Difference]: Without dead ends: 2484 [2021-12-22 09:27:25,725 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:27:25,731 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 236 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:25,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 366 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-22 09:27:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-12-22 09:27:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2182. [2021-12-22 09:27:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 1.2810637322329206) internal successors, (2794), 2181 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 2794 transitions. [2021-12-22 09:27:25,771 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 2794 transitions. Word has length 143 [2021-12-22 09:27:25,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:25,772 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 2794 transitions. [2021-12-22 09:27:25,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:25,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 2794 transitions. [2021-12-22 09:27:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-22 09:27:25,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:25,787 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-22 09:27:25,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:27:25,787 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:25,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:25,789 INFO L85 PathProgramCache]: Analyzing trace with hash 190346487, now seen corresponding path program 1 times [2021-12-22 09:27:25,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:25,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392731170] [2021-12-22 09:27:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:25,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 09:27:25,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:25,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392731170] [2021-12-22 09:27:25,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392731170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:25,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:25,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:25,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800026430] [2021-12-22 09:27:25,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:25,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:25,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:25,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:25,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:25,953 INFO L87 Difference]: Start difference. First operand 2182 states and 2794 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:27,183 INFO L93 Difference]: Finished difference Result 6166 states and 7958 transitions. [2021-12-22 09:27:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:27,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 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 234 [2021-12-22 09:27:27,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:27,195 INFO L225 Difference]: With dead ends: 6166 [2021-12-22 09:27:27,196 INFO L226 Difference]: Without dead ends: 3986 [2021-12-22 09:27:27,198 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:27:27,199 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:27,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:27:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-12-22 09:27:27,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3682. [2021-12-22 09:27:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 1.219505569138821) internal successors, (4489), 3681 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4489 transitions. [2021-12-22 09:27:27,253 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4489 transitions. Word has length 234 [2021-12-22 09:27:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:27,254 INFO L470 AbstractCegarLoop]: Abstraction has 3682 states and 4489 transitions. [2021-12-22 09:27:27,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4489 transitions. [2021-12-22 09:27:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-12-22 09:27:27,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:27,259 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:27,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:27:27,259 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:27,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:27,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1927793021, now seen corresponding path program 1 times [2021-12-22 09:27:27,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:27,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975964456] [2021-12-22 09:27:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:27,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-22 09:27:27,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:27,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975964456] [2021-12-22 09:27:27,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975964456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:27,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:27,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:27,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802611719] [2021-12-22 09:27:27,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:27,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:27,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:27,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:27,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:27,455 INFO L87 Difference]: Start difference. First operand 3682 states and 4489 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:28,798 INFO L93 Difference]: Finished difference Result 7661 states and 9287 transitions. [2021-12-22 09:27:28,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:28,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 336 [2021-12-22 09:27:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:28,810 INFO L225 Difference]: With dead ends: 7661 [2021-12-22 09:27:28,811 INFO L226 Difference]: Without dead ends: 3981 [2021-12-22 09:27:28,815 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:27:28,815 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:28,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:27:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2021-12-22 09:27:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3981. [2021-12-22 09:27:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3981 states, 3980 states have (on average 1.2045226130653266) internal successors, (4794), 3980 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 4794 transitions. [2021-12-22 09:27:28,884 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 4794 transitions. Word has length 336 [2021-12-22 09:27:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:28,884 INFO L470 AbstractCegarLoop]: Abstraction has 3981 states and 4794 transitions. [2021-12-22 09:27:28,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:28,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 4794 transitions. [2021-12-22 09:27:28,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-12-22 09:27:28,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:28,890 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:28,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:27:28,892 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:28,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:28,893 INFO L85 PathProgramCache]: Analyzing trace with hash 319333710, now seen corresponding path program 1 times [2021-12-22 09:27:28,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:28,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489330800] [2021-12-22 09:27:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:28,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 09:27:29,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:29,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489330800] [2021-12-22 09:27:29,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489330800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:29,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:29,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:29,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381765464] [2021-12-22 09:27:29,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:29,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:29,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:29,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:29,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:29,089 INFO L87 Difference]: Start difference. First operand 3981 states and 4794 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:30,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:30,544 INFO L93 Difference]: Finished difference Result 9465 states and 11668 transitions. [2021-12-22 09:27:30,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:30,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 351 [2021-12-22 09:27:30,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:30,568 INFO L225 Difference]: With dead ends: 9465 [2021-12-22 09:27:30,568 INFO L226 Difference]: Without dead ends: 5785 [2021-12-22 09:27:30,572 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:27:30,573 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 252 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:30,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 671 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 09:27:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5785 states. [2021-12-22 09:27:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5785 to 5783. [2021-12-22 09:27:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5782 states have (on average 1.1672431684538223) internal successors, (6749), 5782 states have internal predecessors, (6749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 6749 transitions. [2021-12-22 09:27:30,653 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 6749 transitions. Word has length 351 [2021-12-22 09:27:30,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:30,654 INFO L470 AbstractCegarLoop]: Abstraction has 5783 states and 6749 transitions. [2021-12-22 09:27:30,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 6749 transitions. [2021-12-22 09:27:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2021-12-22 09:27:30,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:30,660 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:30,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:27:30,660 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:30,661 INFO L85 PathProgramCache]: Analyzing trace with hash 757007055, now seen corresponding path program 1 times [2021-12-22 09:27:30,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:30,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262268882] [2021-12-22 09:27:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:30,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-22 09:27:30,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:30,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262268882] [2021-12-22 09:27:30,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262268882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:30,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:30,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:30,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419351406] [2021-12-22 09:27:30,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:30,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:30,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:30,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:30,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:30,884 INFO L87 Difference]: Start difference. First operand 5783 states and 6749 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:32,275 INFO L93 Difference]: Finished difference Result 13368 states and 15915 transitions. [2021-12-22 09:27:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 410 [2021-12-22 09:27:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:32,299 INFO L225 Difference]: With dead ends: 13368 [2021-12-22 09:27:32,299 INFO L226 Difference]: Without dead ends: 7886 [2021-12-22 09:27:32,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:32,306 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 329 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:32,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 192 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:27:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7886 states. [2021-12-22 09:27:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7886 to 6683. [2021-12-22 09:27:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6683 states, 6682 states have (on average 1.2012870398084405) internal successors, (8027), 6682 states have internal predecessors, (8027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6683 states to 6683 states and 8027 transitions. [2021-12-22 09:27:32,408 INFO L78 Accepts]: Start accepts. Automaton has 6683 states and 8027 transitions. Word has length 410 [2021-12-22 09:27:32,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:32,411 INFO L470 AbstractCegarLoop]: Abstraction has 6683 states and 8027 transitions. [2021-12-22 09:27:32,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:32,412 INFO L276 IsEmpty]: Start isEmpty. Operand 6683 states and 8027 transitions. [2021-12-22 09:27:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-12-22 09:27:32,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:32,418 INFO L514 BasicCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:32,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:27:32,419 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1919562374, now seen corresponding path program 1 times [2021-12-22 09:27:32,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:32,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265125957] [2021-12-22 09:27:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:32,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:32,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:32,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265125957] [2021-12-22 09:27:32,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265125957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:32,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:32,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:32,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030173347] [2021-12-22 09:27:32,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:32,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:32,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:32,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:32,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:32,579 INFO L87 Difference]: Start difference. First operand 6683 states and 8027 transitions. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:33,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:33,963 INFO L93 Difference]: Finished difference Result 14268 states and 17137 transitions. [2021-12-22 09:27:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:33,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 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 427 [2021-12-22 09:27:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:33,982 INFO L225 Difference]: With dead ends: 14268 [2021-12-22 09:27:33,982 INFO L226 Difference]: Without dead ends: 7886 [2021-12-22 09:27:33,989 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:27:33,989 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 248 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:33,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 621 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:27:33,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7886 states. [2021-12-22 09:27:34,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7886 to 7580. [2021-12-22 09:27:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7580 states, 7579 states have (on average 1.1382768175221005) internal successors, (8627), 7579 states have internal predecessors, (8627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7580 states to 7580 states and 8627 transitions. [2021-12-22 09:27:34,079 INFO L78 Accepts]: Start accepts. Automaton has 7580 states and 8627 transitions. Word has length 427 [2021-12-22 09:27:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:34,080 INFO L470 AbstractCegarLoop]: Abstraction has 7580 states and 8627 transitions. [2021-12-22 09:27:34,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:34,080 INFO L276 IsEmpty]: Start isEmpty. Operand 7580 states and 8627 transitions. [2021-12-22 09:27:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-12-22 09:27:34,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:34,086 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:34,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:27:34,087 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:34,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:34,087 INFO L85 PathProgramCache]: Analyzing trace with hash 273734370, now seen corresponding path program 1 times [2021-12-22 09:27:34,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:34,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820984769] [2021-12-22 09:27:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:34,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 09:27:34,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:34,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820984769] [2021-12-22 09:27:34,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820984769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:34,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:34,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:34,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941073357] [2021-12-22 09:27:34,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:34,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:34,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:34,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:34,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:34,280 INFO L87 Difference]: Start difference. First operand 7580 states and 8627 transitions. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:35,831 INFO L93 Difference]: Finished difference Result 17251 states and 19803 transitions. [2021-12-22 09:27:35,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:35,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 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 437 [2021-12-22 09:27:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:35,845 INFO L225 Difference]: With dead ends: 17251 [2021-12-22 09:27:35,846 INFO L226 Difference]: Without dead ends: 9972 [2021-12-22 09:27:35,851 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:27:35,851 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 250 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:35,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 315 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 09:27:35,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9972 states. [2021-12-22 09:27:35,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9972 to 6079. [2021-12-22 09:27:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6079 states, 6078 states have (on average 1.150378413951958) internal successors, (6992), 6078 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:35,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6079 states to 6079 states and 6992 transitions. [2021-12-22 09:27:35,932 INFO L78 Accepts]: Start accepts. Automaton has 6079 states and 6992 transitions. Word has length 437 [2021-12-22 09:27:35,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:35,933 INFO L470 AbstractCegarLoop]: Abstraction has 6079 states and 6992 transitions. [2021-12-22 09:27:35,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:35,934 INFO L276 IsEmpty]: Start isEmpty. Operand 6079 states and 6992 transitions. [2021-12-22 09:27:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2021-12-22 09:27:35,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:35,939 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-12-22 09:27:35,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:27:35,939 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash -912359307, now seen corresponding path program 1 times [2021-12-22 09:27:35,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:35,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574543504] [2021-12-22 09:27:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:35,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-22 09:27:36,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:36,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574543504] [2021-12-22 09:27:36,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574543504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:36,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:36,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:36,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080382753] [2021-12-22 09:27:36,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:36,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:36,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:36,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:36,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:36,184 INFO L87 Difference]: Start difference. First operand 6079 states and 6992 transitions. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:37,540 INFO L93 Difference]: Finished difference Result 13949 states and 16346 transitions. [2021-12-22 09:27:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 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 528 [2021-12-22 09:27:37,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:37,552 INFO L225 Difference]: With dead ends: 13949 [2021-12-22 09:27:37,552 INFO L226 Difference]: Without dead ends: 8171 [2021-12-22 09:27:37,557 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:27:37,558 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 351 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:37,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 447 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:27:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8171 states. [2021-12-22 09:27:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8171 to 8171. [2021-12-22 09:27:37,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8171 states, 8170 states have (on average 1.1615667074663403) internal successors, (9490), 8170 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 9490 transitions. [2021-12-22 09:27:37,646 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 9490 transitions. Word has length 528 [2021-12-22 09:27:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:37,647 INFO L470 AbstractCegarLoop]: Abstraction has 8171 states and 9490 transitions. [2021-12-22 09:27:37,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 9490 transitions. [2021-12-22 09:27:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2021-12-22 09:27:37,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:37,655 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:37,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:27:37,655 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:37,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1431152031, now seen corresponding path program 1 times [2021-12-22 09:27:37,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:37,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928532803] [2021-12-22 09:27:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:37,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 620 proven. 39 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-12-22 09:27:37,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:37,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928532803] [2021-12-22 09:27:37,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928532803] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:27:37,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100571645] [2021-12-22 09:27:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:37,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:27:37,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:37,907 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) [2021-12-22 09:27:37,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:27:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:38,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 09:27:38,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:27:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 620 proven. 39 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-12-22 09:27:39,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:27:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 620 proven. 39 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-12-22 09:27:41,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100571645] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:27:41,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:27:41,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-22 09:27:41,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259380552] [2021-12-22 09:27:41,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:27:41,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 09:27:41,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 09:27:41,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:27:41,078 INFO L87 Difference]: Start difference. First operand 8171 states and 9490 transitions. Second operand has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:46,745 INFO L93 Difference]: Finished difference Result 22880 states and 26314 transitions. [2021-12-22 09:27:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 09:27:46,746 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 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 619 [2021-12-22 09:27:46,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:46,764 INFO L225 Difference]: With dead ends: 22880 [2021-12-22 09:27:46,764 INFO L226 Difference]: Without dead ends: 10863 [2021-12-22 09:27:46,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1247 GetRequests, 1232 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-22 09:27:46,771 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 3108 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 5827 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3108 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 6472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 5827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:46,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3108 Valid, 279 Invalid, 6472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 5827 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-22 09:27:46,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10863 states. [2021-12-22 09:27:46,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10863 to 7870. [2021-12-22 09:27:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7870 states, 7869 states have (on average 1.068242470453679) internal successors, (8406), 7869 states have internal predecessors, (8406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7870 states to 7870 states and 8406 transitions. [2021-12-22 09:27:46,865 INFO L78 Accepts]: Start accepts. Automaton has 7870 states and 8406 transitions. Word has length 619 [2021-12-22 09:27:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:46,865 INFO L470 AbstractCegarLoop]: Abstraction has 7870 states and 8406 transitions. [2021-12-22 09:27:46,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 7870 states and 8406 transitions. [2021-12-22 09:27:46,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2021-12-22 09:27:46,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:46,874 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:27:46,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:27:47,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 09:27:47,100 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:47,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:47,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1702599014, now seen corresponding path program 1 times [2021-12-22 09:27:47,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:47,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194912167] [2021-12-22 09:27:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:47,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2021-12-22 09:27:47,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:47,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194912167] [2021-12-22 09:27:47,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194912167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:47,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:47,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:47,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811650351] [2021-12-22 09:27:47,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:47,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:47,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:47,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:47,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:47,375 INFO L87 Difference]: Start difference. First operand 7870 states and 8406 transitions. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:48,363 INFO L93 Difference]: Finished difference Result 17830 states and 19176 transitions. [2021-12-22 09:27:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:48,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 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 689 [2021-12-22 09:27:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:48,377 INFO L225 Difference]: With dead ends: 17830 [2021-12-22 09:27:48,378 INFO L226 Difference]: Without dead ends: 9962 [2021-12-22 09:27:48,384 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:27:48,385 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 266 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:48,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 191 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:27:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9962 states. [2021-12-22 09:27:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9962 to 9662. [2021-12-22 09:27:48,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9662 states, 9661 states have (on average 1.0650036228133735) internal successors, (10289), 9661 states have internal predecessors, (10289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:48,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9662 states to 9662 states and 10289 transitions. [2021-12-22 09:27:48,490 INFO L78 Accepts]: Start accepts. Automaton has 9662 states and 10289 transitions. Word has length 689 [2021-12-22 09:27:48,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:48,490 INFO L470 AbstractCegarLoop]: Abstraction has 9662 states and 10289 transitions. [2021-12-22 09:27:48,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 9662 states and 10289 transitions. [2021-12-22 09:27:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 697 [2021-12-22 09:27:48,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:48,504 INFO L514 BasicCegarLoop]: 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:48,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:27:48,505 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:48,505 INFO L85 PathProgramCache]: Analyzing trace with hash 360982866, now seen corresponding path program 1 times [2021-12-22 09:27:48,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:48,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210052064] [2021-12-22 09:27:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:48,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 629 proven. 190 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-22 09:27:48,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:48,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210052064] [2021-12-22 09:27:48,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210052064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:27:48,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804008241] [2021-12-22 09:27:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:48,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:27:48,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:48,764 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) [2021-12-22 09:27:48,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:27:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:48,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:27:48,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:27:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-12-22 09:27:50,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:27:50,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804008241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:50,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:27:50,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-12-22 09:27:50,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487374064] [2021-12-22 09:27:50,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:50,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:27:50,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:50,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:27:50,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:27:50,318 INFO L87 Difference]: Start difference. First operand 9662 states and 10289 transitions. Second operand has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:51,971 INFO L93 Difference]: Finished difference Result 22021 states and 23509 transitions. [2021-12-22 09:27:51,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:51,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 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 696 [2021-12-22 09:27:51,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:51,987 INFO L225 Difference]: With dead ends: 22021 [2021-12-22 09:27:51,987 INFO L226 Difference]: Without dead ends: 12361 [2021-12-22 09:27:51,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:27:51,996 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 183 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:51,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 220 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:27:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12361 states. [2021-12-22 09:27:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12361 to 12060. [2021-12-22 09:27:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12060 states, 12059 states have (on average 1.0626917654863588) internal successors, (12815), 12059 states have internal predecessors, (12815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12060 states to 12060 states and 12815 transitions. [2021-12-22 09:27:52,124 INFO L78 Accepts]: Start accepts. Automaton has 12060 states and 12815 transitions. Word has length 696 [2021-12-22 09:27:52,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:52,125 INFO L470 AbstractCegarLoop]: Abstraction has 12060 states and 12815 transitions. [2021-12-22 09:27:52,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:52,125 INFO L276 IsEmpty]: Start isEmpty. Operand 12060 states and 12815 transitions. [2021-12-22 09:27:52,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2021-12-22 09:27:52,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:52,164 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:52,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:27:52,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 09:27:52,365 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:52,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1088248683, now seen corresponding path program 1 times [2021-12-22 09:27:52,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:52,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186836636] [2021-12-22 09:27:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:52,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 562 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-22 09:27:52,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:52,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186836636] [2021-12-22 09:27:52,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186836636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:52,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:52,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:52,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76519558] [2021-12-22 09:27:52,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:52,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:52,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:52,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:52,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:52,723 INFO L87 Difference]: Start difference. First operand 12060 states and 12815 transitions. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:53,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:53,650 INFO L93 Difference]: Finished difference Result 23816 states and 25324 transitions. [2021-12-22 09:27:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:53,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 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 714 [2021-12-22 09:27:53,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:53,670 INFO L225 Difference]: With dead ends: 23816 [2021-12-22 09:27:53,670 INFO L226 Difference]: Without dead ends: 12057 [2021-12-22 09:27:53,678 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:27:53,679 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 435 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:53,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 69 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:27:53,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12057 states. [2021-12-22 09:27:53,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12057 to 12056. [2021-12-22 09:27:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12056 states, 12055 states have (on average 1.0624637080049772) internal successors, (12808), 12055 states have internal predecessors, (12808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12056 states to 12056 states and 12808 transitions. [2021-12-22 09:27:53,800 INFO L78 Accepts]: Start accepts. Automaton has 12056 states and 12808 transitions. Word has length 714 [2021-12-22 09:27:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:53,801 INFO L470 AbstractCegarLoop]: Abstraction has 12056 states and 12808 transitions. [2021-12-22 09:27:53,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 12056 states and 12808 transitions. [2021-12-22 09:27:53,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2021-12-22 09:27:53,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:53,811 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:27:53,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 09:27:53,811 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:53,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:53,812 INFO L85 PathProgramCache]: Analyzing trace with hash -778252297, now seen corresponding path program 1 times [2021-12-22 09:27:53,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:53,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255666444] [2021-12-22 09:27:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:53,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 292 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:54,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:54,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255666444] [2021-12-22 09:27:54,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255666444] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:27:54,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803697343] [2021-12-22 09:27:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:54,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:27:54,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:54,195 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) [2021-12-22 09:27:54,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 09:27:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:54,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:27:54,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:27:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2021-12-22 09:27:55,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:27:55,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803697343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:55,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:27:55,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-22 09:27:55,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426341987] [2021-12-22 09:27:55,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:55,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:55,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:27:55,473 INFO L87 Difference]: Start difference. First operand 12056 states and 12808 transitions. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:56,921 INFO L93 Difference]: Finished difference Result 28012 states and 29830 transitions. [2021-12-22 09:27:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:56,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 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 722 [2021-12-22 09:27:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:56,999 INFO L225 Difference]: With dead ends: 28012 [2021-12-22 09:27:57,005 INFO L226 Difference]: Without dead ends: 16257 [2021-12-22 09:27:57,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 721 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:27:57,018 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 258 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:57,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 500 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:27:57,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16257 states. [2021-12-22 09:27:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16257 to 15647. [2021-12-22 09:27:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15647 states, 15646 states have (on average 1.0541991563338873) internal successors, (16494), 15646 states have internal predecessors, (16494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:57,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15647 states to 15647 states and 16494 transitions. [2021-12-22 09:27:57,293 INFO L78 Accepts]: Start accepts. Automaton has 15647 states and 16494 transitions. Word has length 722 [2021-12-22 09:27:57,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:57,293 INFO L470 AbstractCegarLoop]: Abstraction has 15647 states and 16494 transitions. [2021-12-22 09:27:57,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 15647 states and 16494 transitions. [2021-12-22 09:27:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2021-12-22 09:27:57,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:57,315 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:57,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 09:27:57,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:27:57,540 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:57,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:57,540 INFO L85 PathProgramCache]: Analyzing trace with hash -965881644, now seen corresponding path program 1 times [2021-12-22 09:27:57,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:57,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089964140] [2021-12-22 09:27:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:57,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 643 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-22 09:27:57,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:57,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089964140] [2021-12-22 09:27:57,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089964140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:57,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:57,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:27:57,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572846143] [2021-12-22 09:27:57,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:57,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:27:57,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:57,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:27:57,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:27:57,816 INFO L87 Difference]: Start difference. First operand 15647 states and 16494 transitions. Second operand has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:59,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:59,255 INFO L93 Difference]: Finished difference Result 35485 states and 37435 transitions. [2021-12-22 09:27:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:27:59,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 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 733 [2021-12-22 09:27:59,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:59,276 INFO L225 Difference]: With dead ends: 35485 [2021-12-22 09:27:59,276 INFO L226 Difference]: Without dead ends: 20139 [2021-12-22 09:27:59,286 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:27:59,287 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 473 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:59,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 178 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:27:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20139 states. [2021-12-22 09:27:59,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20139 to 15647. [2021-12-22 09:27:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15647 states, 15646 states have (on average 1.0541991563338873) internal successors, (16494), 15646 states have internal predecessors, (16494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15647 states to 15647 states and 16494 transitions. [2021-12-22 09:27:59,451 INFO L78 Accepts]: Start accepts. Automaton has 15647 states and 16494 transitions. Word has length 733 [2021-12-22 09:27:59,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:59,452 INFO L470 AbstractCegarLoop]: Abstraction has 15647 states and 16494 transitions. [2021-12-22 09:27:59,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 15647 states and 16494 transitions. [2021-12-22 09:27:59,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2021-12-22 09:27:59,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:59,468 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 09:27:59,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 09:27:59,468 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:59,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:59,469 INFO L85 PathProgramCache]: Analyzing trace with hash 376654277, now seen corresponding path program 1 times [2021-12-22 09:27:59,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:59,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233322937] [2021-12-22 09:27:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:59,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 651 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-12-22 09:27:59,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:59,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233322937] [2021-12-22 09:27:59,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233322937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:59,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:59,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:59,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975307518] [2021-12-22 09:27:59,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:59,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:59,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:59,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:59,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:59,746 INFO L87 Difference]: Start difference. First operand 15647 states and 16494 transitions. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:00,636 INFO L93 Difference]: Finished difference Result 33397 states and 35286 transitions. [2021-12-22 09:28:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:00,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 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 760 [2021-12-22 09:28:00,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:00,651 INFO L225 Difference]: With dead ends: 33397 [2021-12-22 09:28:00,651 INFO L226 Difference]: Without dead ends: 18051 [2021-12-22 09:28:00,662 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:28:00,663 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 173 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:00,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 535 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:28:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18051 states. [2021-12-22 09:28:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18051 to 18051. [2021-12-22 09:28:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18051 states, 18050 states have (on average 1.0504709141274238) internal successors, (18961), 18050 states have internal predecessors, (18961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18051 states to 18051 states and 18961 transitions. [2021-12-22 09:28:00,844 INFO L78 Accepts]: Start accepts. Automaton has 18051 states and 18961 transitions. Word has length 760 [2021-12-22 09:28:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:00,845 INFO L470 AbstractCegarLoop]: Abstraction has 18051 states and 18961 transitions. [2021-12-22 09:28:00,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 18051 states and 18961 transitions. [2021-12-22 09:28:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2021-12-22 09:28:00,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:00,861 INFO L514 BasicCegarLoop]: 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 09:28:00,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 09:28:00,861 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:00,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1874438345, now seen corresponding path program 1 times [2021-12-22 09:28:00,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:00,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012488007] [2021-12-22 09:28:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:00,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 762 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-12-22 09:28:01,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:01,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012488007] [2021-12-22 09:28:01,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012488007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:01,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:01,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:01,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317867153] [2021-12-22 09:28:01,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:01,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:01,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:01,135 INFO L87 Difference]: Start difference. First operand 18051 states and 18961 transitions. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:02,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:02,090 INFO L93 Difference]: Finished difference Result 38492 states and 40594 transitions. [2021-12-22 09:28:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:02,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 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 772 [2021-12-22 09:28:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:02,107 INFO L225 Difference]: With dead ends: 38492 [2021-12-22 09:28:02,107 INFO L226 Difference]: Without dead ends: 20742 [2021-12-22 09:28:02,114 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:28:02,115 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 238 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:02,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 515 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:28:02,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20742 states. [2021-12-22 09:28:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20742 to 20443. [2021-12-22 09:28:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20443 states, 20442 states have (on average 1.0438313276587419) internal successors, (21338), 20442 states have internal predecessors, (21338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20443 states to 20443 states and 21338 transitions. [2021-12-22 09:28:02,279 INFO L78 Accepts]: Start accepts. Automaton has 20443 states and 21338 transitions. Word has length 772 [2021-12-22 09:28:02,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:02,279 INFO L470 AbstractCegarLoop]: Abstraction has 20443 states and 21338 transitions. [2021-12-22 09:28:02,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:02,279 INFO L276 IsEmpty]: Start isEmpty. Operand 20443 states and 21338 transitions. [2021-12-22 09:28:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2021-12-22 09:28:02,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:02,290 INFO L514 BasicCegarLoop]: 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 09:28:02,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 09:28:02,291 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:02,292 INFO L85 PathProgramCache]: Analyzing trace with hash -226643698, now seen corresponding path program 1 times [2021-12-22 09:28:02,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:02,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860685077] [2021-12-22 09:28:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:02,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 600 proven. 0 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2021-12-22 09:28:02,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:02,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860685077] [2021-12-22 09:28:02,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860685077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:02,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:02,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:02,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348250859] [2021-12-22 09:28:02,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:02,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:02,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:02,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:02,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:02,560 INFO L87 Difference]: Start difference. First operand 20443 states and 21338 transitions. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:03,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:03,738 INFO L93 Difference]: Finished difference Result 43293 states and 45271 transitions. [2021-12-22 09:28:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:03,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 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 773 [2021-12-22 09:28:03,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:03,756 INFO L225 Difference]: With dead ends: 43293 [2021-12-22 09:28:03,756 INFO L226 Difference]: Without dead ends: 23151 [2021-12-22 09:28:03,763 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:28:03,763 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 350 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:03,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 123 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:28:03,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23151 states. [2021-12-22 09:28:03,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23151 to 20739. [2021-12-22 09:28:03,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20739 states, 20738 states have (on average 1.046195390105121) internal successors, (21696), 20738 states have internal predecessors, (21696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:03,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20739 states to 20739 states and 21696 transitions. [2021-12-22 09:28:03,940 INFO L78 Accepts]: Start accepts. Automaton has 20739 states and 21696 transitions. Word has length 773 [2021-12-22 09:28:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:03,940 INFO L470 AbstractCegarLoop]: Abstraction has 20739 states and 21696 transitions. [2021-12-22 09:28:03,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 20739 states and 21696 transitions. [2021-12-22 09:28:03,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2021-12-22 09:28:03,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:03,954 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 09:28:03,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 09:28:03,955 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:03,955 INFO L85 PathProgramCache]: Analyzing trace with hash -462299624, now seen corresponding path program 1 times [2021-12-22 09:28:03,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:03,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402700160] [2021-12-22 09:28:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:03,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 647 proven. 188 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-12-22 09:28:04,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:04,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402700160] [2021-12-22 09:28:04,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402700160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:28:04,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119387786] [2021-12-22 09:28:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:04,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:04,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:28:04,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:28:04,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 09:28:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:04,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:28:04,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:28:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 677 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-22 09:28:05,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:28:05,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119387786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:05,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:28:05,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-12-22 09:28:05,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643450215] [2021-12-22 09:28:05,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:05,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:28:05,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:05,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:28:05,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:28:05,821 INFO L87 Difference]: Start difference. First operand 20739 states and 21696 transitions. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:07,682 INFO L93 Difference]: Finished difference Result 49572 states and 51911 transitions. [2021-12-22 09:28:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:28:07,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 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 786 [2021-12-22 09:28:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:07,708 INFO L225 Difference]: With dead ends: 49572 [2021-12-22 09:28:07,708 INFO L226 Difference]: Without dead ends: 29134 [2021-12-22 09:28:07,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 784 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:28:07,721 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 470 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:07,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 139 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-22 09:28:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29134 states. [2021-12-22 09:28:08,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29134 to 24934. [2021-12-22 09:28:08,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24934 states, 24933 states have (on average 1.0498937151566197) internal successors, (26177), 24933 states have internal predecessors, (26177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24934 states to 24934 states and 26177 transitions. [2021-12-22 09:28:08,061 INFO L78 Accepts]: Start accepts. Automaton has 24934 states and 26177 transitions. Word has length 786 [2021-12-22 09:28:08,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:08,061 INFO L470 AbstractCegarLoop]: Abstraction has 24934 states and 26177 transitions. [2021-12-22 09:28:08,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:08,062 INFO L276 IsEmpty]: Start isEmpty. Operand 24934 states and 26177 transitions. [2021-12-22 09:28:08,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2021-12-22 09:28:08,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:08,075 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:08,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 09:28:08,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:08,277 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:08,277 INFO L85 PathProgramCache]: Analyzing trace with hash 89927621, now seen corresponding path program 1 times [2021-12-22 09:28:08,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:08,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764403559] [2021-12-22 09:28:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:08,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 589 proven. 0 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2021-12-22 09:28:08,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:08,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764403559] [2021-12-22 09:28:08,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764403559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:08,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:08,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:08,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672257120] [2021-12-22 09:28:08,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:08,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:08,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:08,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:08,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:08,541 INFO L87 Difference]: Start difference. First operand 24934 states and 26177 transitions. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:09,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:09,319 INFO L93 Difference]: Finished difference Result 43235 states and 45444 transitions. [2021-12-22 09:28:09,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:09,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 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 796 [2021-12-22 09:28:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:09,334 INFO L225 Difference]: With dead ends: 43235 [2021-12-22 09:28:09,334 INFO L226 Difference]: Without dead ends: 18602 [2021-12-22 09:28:09,345 INFO L932 BasicCegarLoop]: 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 [2021-12-22 09:28:09,346 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 340 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:09,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 361 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:28:09,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18602 states. [2021-12-22 09:28:09,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18602 to 16808. [2021-12-22 09:28:09,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16808 states, 16807 states have (on average 1.0369488903433093) internal successors, (17428), 16807 states have internal predecessors, (17428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16808 states to 16808 states and 17428 transitions. [2021-12-22 09:28:09,496 INFO L78 Accepts]: Start accepts. Automaton has 16808 states and 17428 transitions. Word has length 796 [2021-12-22 09:28:09,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:09,496 INFO L470 AbstractCegarLoop]: Abstraction has 16808 states and 17428 transitions. [2021-12-22 09:28:09,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:09,496 INFO L276 IsEmpty]: Start isEmpty. Operand 16808 states and 17428 transitions. [2021-12-22 09:28:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 963 [2021-12-22 09:28:09,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:09,509 INFO L514 BasicCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:09,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 09:28:09,509 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:09,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1474347218, now seen corresponding path program 1 times [2021-12-22 09:28:09,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:09,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887040440] [2021-12-22 09:28:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:09,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 810 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-12-22 09:28:09,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:09,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887040440] [2021-12-22 09:28:09,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887040440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:09,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:09,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:09,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936478741] [2021-12-22 09:28:09,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:09,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:09,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:09,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:09,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:09,797 INFO L87 Difference]: Start difference. First operand 16808 states and 17428 transitions. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)