./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/locks/test_locks_14-1.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/locks/test_locks_14-1.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 1e1f6c8a80d54f6d4b7b413368cc99af6eca243b930331d178961d851b56afbd --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 08:35:09,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:35:09,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:35:09,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:35:09,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:35:09,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:35:09,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:35:09,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:35:09,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:35:09,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:35:09,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:35:09,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:35:09,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:35:09,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:35:09,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:35:09,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:35:09,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:35:09,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:35:09,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:35:09,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:35:09,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:35:09,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:35:09,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:35:09,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:35:09,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:35:09,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:35:09,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:35:09,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:35:09,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:35:09,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:35:09,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:35:09,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:35:09,529 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:35:09,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:35:09,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:35:09,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:35:09,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:35:09,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:35:09,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:35:09,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:35:09,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:35:09,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:35:09,561 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:35:09,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:35:09,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:35:09,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:35:09,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:35:09,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:35:09,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:35:09,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:35:09,565 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:35:09,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:35:09,565 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:35:09,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:35:09,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:35:09,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:35:09,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:35:09,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:35:09,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:35:09,567 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:35:09,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:35:09,567 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:35:09,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:35:09,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:35:09,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:35:09,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:35:09,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:35:09,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:35:09,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:35:09,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:35:09,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:35:09,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:35:09,569 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:35:09,569 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:35:09,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:35:09,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:35:09,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e1f6c8a80d54f6d4b7b413368cc99af6eca243b930331d178961d851b56afbd [2021-12-22 08:35:09,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:35:09,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:35:09,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:35:09,761 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:35:09,761 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:35:09,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_14-1.c [2021-12-22 08:35:09,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b2e032b2/cc5651cf764f4caa9304fa849df879c8/FLAG6ba28c217 [2021-12-22 08:35:10,126 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:35:10,126 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_14-1.c [2021-12-22 08:35:10,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b2e032b2/cc5651cf764f4caa9304fa849df879c8/FLAG6ba28c217 [2021-12-22 08:35:10,539 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b2e032b2/cc5651cf764f4caa9304fa849df879c8 [2021-12-22 08:35:10,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:35:10,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:35:10,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:35:10,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:35:10,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:35:10,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:35:10" (1/1) ... [2021-12-22 08:35:10,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42afbbec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:10, skipping insertion in model container [2021-12-22 08:35:10,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:35:10" (1/1) ... [2021-12-22 08:35:10,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:35:10,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:35:10,741 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/locks/test_locks_14-1.c[5283,5296] [2021-12-22 08:35:10,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:35:10,756 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:35:10,788 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/locks/test_locks_14-1.c[5283,5296] [2021-12-22 08:35:10,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:35:10,801 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:35:10,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:10 WrapperNode [2021-12-22 08:35:10,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:35:10,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:35:10,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:35:10,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:35:10,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:10" (1/1) ... [2021-12-22 08:35:10,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:10" (1/1) ... [2021-12-22 08:35:10,842 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 182 [2021-12-22 08:35:10,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:35:10,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:35:10,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:35:10,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:35:10,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:10" (1/1) ... [2021-12-22 08:35:10,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:10" (1/1) ... [2021-12-22 08:35:10,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:10" (1/1) ... [2021-12-22 08:35:10,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:10" (1/1) ... [2021-12-22 08:35:10,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:10" (1/1) ... [2021-12-22 08:35:10,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:10" (1/1) ... [2021-12-22 08:35:10,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:10" (1/1) ... [2021-12-22 08:35:10,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:35:10,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:35:10,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:35:10,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:35:10,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:10" (1/1) ... [2021-12-22 08:35:10,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:35:10,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:35:10,921 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 08:35:10,945 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 08:35:10,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:35:10,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:35:10,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:35:10,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:35:11,021 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:35:11,023 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:35:11,171 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:35:11,176 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:35:11,176 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 08:35:11,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:35:11 BoogieIcfgContainer [2021-12-22 08:35:11,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:35:11,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:35:11,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:35:11,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:35:11,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:35:10" (1/3) ... [2021-12-22 08:35:11,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aebcf1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:35:11, skipping insertion in model container [2021-12-22 08:35:11,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:10" (2/3) ... [2021-12-22 08:35:11,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aebcf1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:35:11, skipping insertion in model container [2021-12-22 08:35:11,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:35:11" (3/3) ... [2021-12-22 08:35:11,198 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.c [2021-12-22 08:35:11,201 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:35:11,202 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:35:11,235 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:35:11,240 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 08:35:11,241 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:35:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 50 states have (on average 1.92) internal successors, (96), 51 states have internal predecessors, (96), 0 states have call successors, (0), 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 08:35:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 08:35:11,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:11,275 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] [2021-12-22 08:35:11,279 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:11,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:11,283 INFO L85 PathProgramCache]: Analyzing trace with hash 792943379, now seen corresponding path program 1 times [2021-12-22 08:35:11,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:11,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667330784] [2021-12-22 08:35:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:11,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:11,459 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 08:35:11,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:11,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667330784] [2021-12-22 08:35:11,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667330784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:11,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:11,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:11,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224823648] [2021-12-22 08:35:11,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:11,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:11,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:11,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:11,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:11,491 INFO L87 Difference]: Start difference. First operand has 52 states, 50 states have (on average 1.92) internal successors, (96), 51 states have internal predecessors, (96), 0 states have call successors, (0), 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 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 08:35:11,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:11,545 INFO L93 Difference]: Finished difference Result 107 states and 193 transitions. [2021-12-22 08:35:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:11,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-22 08:35:11,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:11,556 INFO L225 Difference]: With dead ends: 107 [2021-12-22 08:35:11,556 INFO L226 Difference]: Without dead ends: 93 [2021-12-22 08:35:11,559 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 08:35:11,566 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 72 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:11,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 187 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:11,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-22 08:35:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2021-12-22 08:35:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.903225806451613) internal successors, (118), 62 states have internal predecessors, (118), 0 states have call successors, (0), 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 08:35:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 118 transitions. [2021-12-22 08:35:11,592 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 118 transitions. Word has length 21 [2021-12-22 08:35:11,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:11,592 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 118 transitions. [2021-12-22 08:35:11,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 08:35:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 118 transitions. [2021-12-22 08:35:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 08:35:11,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:11,593 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] [2021-12-22 08:35:11,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:35:11,593 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash -795404523, now seen corresponding path program 1 times [2021-12-22 08:35:11,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:11,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089098045] [2021-12-22 08:35:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:11,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:11,646 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 08:35:11,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:11,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089098045] [2021-12-22 08:35:11,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089098045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:11,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:11,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:11,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006319884] [2021-12-22 08:35:11,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:11,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:11,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:11,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:11,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:11,653 INFO L87 Difference]: Start difference. First operand 63 states and 118 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 08:35:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:11,682 INFO L93 Difference]: Finished difference Result 154 states and 289 transitions. [2021-12-22 08:35:11,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:11,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-22 08:35:11,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:11,684 INFO L225 Difference]: With dead ends: 154 [2021-12-22 08:35:11,684 INFO L226 Difference]: Without dead ends: 93 [2021-12-22 08:35:11,685 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 08:35:11,686 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 68 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:11,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 199 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-22 08:35:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2021-12-22 08:35:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.8888888888888888) internal successors, (170), 90 states have internal predecessors, (170), 0 states have call successors, (0), 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 08:35:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 170 transitions. [2021-12-22 08:35:11,693 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 170 transitions. Word has length 21 [2021-12-22 08:35:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:11,693 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 170 transitions. [2021-12-22 08:35:11,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 08:35:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 170 transitions. [2021-12-22 08:35:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 08:35:11,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:11,694 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] [2021-12-22 08:35:11,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 08:35:11,694 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:11,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1188346975, now seen corresponding path program 1 times [2021-12-22 08:35:11,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:11,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093768897] [2021-12-22 08:35:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:11,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:11,743 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 08:35:11,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:11,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093768897] [2021-12-22 08:35:11,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093768897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:11,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:11,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:11,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139493577] [2021-12-22 08:35:11,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:11,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:11,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:11,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:11,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:11,747 INFO L87 Difference]: Start difference. First operand 91 states and 170 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 08:35:11,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:11,763 INFO L93 Difference]: Finished difference Result 141 states and 258 transitions. [2021-12-22 08:35:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:11,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-12-22 08:35:11,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:11,764 INFO L225 Difference]: With dead ends: 141 [2021-12-22 08:35:11,764 INFO L226 Difference]: Without dead ends: 96 [2021-12-22 08:35:11,764 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 08:35:11,765 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 70 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:11,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 224 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-22 08:35:11,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-12-22 08:35:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.8494623655913978) internal successors, (172), 93 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:11,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 172 transitions. [2021-12-22 08:35:11,785 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 172 transitions. Word has length 22 [2021-12-22 08:35:11,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:11,785 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 172 transitions. [2021-12-22 08:35:11,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 08:35:11,785 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 172 transitions. [2021-12-22 08:35:11,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 08:35:11,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:11,786 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] [2021-12-22 08:35:11,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 08:35:11,787 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:11,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:11,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1112475615, now seen corresponding path program 1 times [2021-12-22 08:35:11,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:11,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679079109] [2021-12-22 08:35:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:11,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:11,833 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 08:35:11,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:11,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679079109] [2021-12-22 08:35:11,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679079109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:11,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:11,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:11,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752790997] [2021-12-22 08:35:11,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:11,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:11,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:11,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:11,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:11,835 INFO L87 Difference]: Start difference. First operand 94 states and 172 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 08:35:11,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:11,850 INFO L93 Difference]: Finished difference Result 181 states and 333 transitions. [2021-12-22 08:35:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:11,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-12-22 08:35:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:11,852 INFO L225 Difference]: With dead ends: 181 [2021-12-22 08:35:11,852 INFO L226 Difference]: Without dead ends: 179 [2021-12-22 08:35:11,852 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 08:35:11,853 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 65 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:11,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 173 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:11,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-22 08:35:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 125. [2021-12-22 08:35:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.846774193548387) internal successors, (229), 124 states have internal predecessors, (229), 0 states have call successors, (0), 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 08:35:11,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 229 transitions. [2021-12-22 08:35:11,875 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 229 transitions. Word has length 22 [2021-12-22 08:35:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:11,875 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 229 transitions. [2021-12-22 08:35:11,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 08:35:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 229 transitions. [2021-12-22 08:35:11,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 08:35:11,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:11,876 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] [2021-12-22 08:35:11,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 08:35:11,876 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:11,877 INFO L85 PathProgramCache]: Analyzing trace with hash -475872287, now seen corresponding path program 1 times [2021-12-22 08:35:11,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:11,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649163063] [2021-12-22 08:35:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:11,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:11,900 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 08:35:11,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:11,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649163063] [2021-12-22 08:35:11,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649163063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:11,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:11,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:11,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480156631] [2021-12-22 08:35:11,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:11,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:11,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:11,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:11,902 INFO L87 Difference]: Start difference. First operand 125 states and 229 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 08:35:11,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:11,916 INFO L93 Difference]: Finished difference Result 301 states and 555 transitions. [2021-12-22 08:35:11,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:11,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-12-22 08:35:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:11,917 INFO L225 Difference]: With dead ends: 301 [2021-12-22 08:35:11,917 INFO L226 Difference]: Without dead ends: 181 [2021-12-22 08:35:11,918 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 08:35:11,919 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 67 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:11,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 200 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-22 08:35:11,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2021-12-22 08:35:11,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.8370786516853932) internal successors, (327), 178 states have internal predecessors, (327), 0 states have call successors, (0), 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 08:35:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 327 transitions. [2021-12-22 08:35:11,927 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 327 transitions. Word has length 22 [2021-12-22 08:35:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:11,928 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 327 transitions. [2021-12-22 08:35:11,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 08:35:11,928 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 327 transitions. [2021-12-22 08:35:11,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 08:35:11,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:11,929 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] [2021-12-22 08:35:11,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 08:35:11,929 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:11,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:11,929 INFO L85 PathProgramCache]: Analyzing trace with hash 127218090, now seen corresponding path program 1 times [2021-12-22 08:35:11,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:11,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756894268] [2021-12-22 08:35:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:11,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:11,951 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 08:35:11,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756894268] [2021-12-22 08:35:11,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756894268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:11,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:11,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:11,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87795311] [2021-12-22 08:35:11,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:11,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:11,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:11,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:11,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:11,953 INFO L87 Difference]: Start difference. First operand 179 states and 327 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 08:35:11,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:11,961 INFO L93 Difference]: Finished difference Result 270 states and 490 transitions. [2021-12-22 08:35:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:11,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-22 08:35:11,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:11,962 INFO L225 Difference]: With dead ends: 270 [2021-12-22 08:35:11,963 INFO L226 Difference]: Without dead ends: 183 [2021-12-22 08:35:11,963 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 08:35:11,964 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 69 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:11,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 220 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:11,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-22 08:35:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2021-12-22 08:35:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.8166666666666667) internal successors, (327), 180 states have internal predecessors, (327), 0 states have call successors, (0), 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 08:35:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 327 transitions. [2021-12-22 08:35:11,979 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 327 transitions. Word has length 23 [2021-12-22 08:35:11,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:11,979 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 327 transitions. [2021-12-22 08:35:11,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 08:35:11,979 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 327 transitions. [2021-12-22 08:35:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 08:35:11,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:11,980 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] [2021-12-22 08:35:11,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 08:35:11,981 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:11,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1866926616, now seen corresponding path program 1 times [2021-12-22 08:35:11,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:11,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308230355] [2021-12-22 08:35:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:11,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:12,003 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 08:35:12,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:12,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308230355] [2021-12-22 08:35:12,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308230355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:12,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:12,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:12,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237707321] [2021-12-22 08:35:12,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:12,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:12,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:12,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:12,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:12,006 INFO L87 Difference]: Start difference. First operand 181 states and 327 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 08:35:12,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:12,019 INFO L93 Difference]: Finished difference Result 525 states and 953 transitions. [2021-12-22 08:35:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:12,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-22 08:35:12,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:12,022 INFO L225 Difference]: With dead ends: 525 [2021-12-22 08:35:12,022 INFO L226 Difference]: Without dead ends: 351 [2021-12-22 08:35:12,023 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 08:35:12,024 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 67 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:12,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 175 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-12-22 08:35:12,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 349. [2021-12-22 08:35:12,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.8017241379310345) internal successors, (627), 348 states have internal predecessors, (627), 0 states have call successors, (0), 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 08:35:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 627 transitions. [2021-12-22 08:35:12,037 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 627 transitions. Word has length 23 [2021-12-22 08:35:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:12,037 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 627 transitions. [2021-12-22 08:35:12,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 08:35:12,038 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 627 transitions. [2021-12-22 08:35:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 08:35:12,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:12,039 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] [2021-12-22 08:35:12,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 08:35:12,040 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:12,040 INFO L85 PathProgramCache]: Analyzing trace with hash -278578714, now seen corresponding path program 1 times [2021-12-22 08:35:12,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:12,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907509544] [2021-12-22 08:35:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:12,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:12,069 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 08:35:12,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:12,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907509544] [2021-12-22 08:35:12,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907509544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:12,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:12,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:12,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155708957] [2021-12-22 08:35:12,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:12,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:12,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:12,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:12,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:12,073 INFO L87 Difference]: Start difference. First operand 349 states and 627 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 08:35:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:12,086 INFO L93 Difference]: Finished difference Result 449 states and 813 transitions. [2021-12-22 08:35:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:12,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-22 08:35:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:12,088 INFO L225 Difference]: With dead ends: 449 [2021-12-22 08:35:12,089 INFO L226 Difference]: Without dead ends: 447 [2021-12-22 08:35:12,089 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 08:35:12,090 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 62 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:12,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 242 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:12,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-22 08:35:12,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 349. [2021-12-22 08:35:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.7902298850574712) internal successors, (623), 348 states have internal predecessors, (623), 0 states have call successors, (0), 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 08:35:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 623 transitions. [2021-12-22 08:35:12,108 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 623 transitions. Word has length 23 [2021-12-22 08:35:12,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:12,108 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 623 transitions. [2021-12-22 08:35:12,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 08:35:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 623 transitions. [2021-12-22 08:35:12,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 08:35:12,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:12,110 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] [2021-12-22 08:35:12,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 08:35:12,110 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:12,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:12,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2039937514, now seen corresponding path program 1 times [2021-12-22 08:35:12,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:12,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477107671] [2021-12-22 08:35:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:12,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:12,136 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 08:35:12,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:12,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477107671] [2021-12-22 08:35:12,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477107671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:12,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:12,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:12,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585642202] [2021-12-22 08:35:12,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:12,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:12,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:12,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:12,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:12,139 INFO L87 Difference]: Start difference. First operand 349 states and 623 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 08:35:12,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:12,150 INFO L93 Difference]: Finished difference Result 661 states and 1193 transitions. [2021-12-22 08:35:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:12,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-22 08:35:12,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:12,152 INFO L225 Difference]: With dead ends: 661 [2021-12-22 08:35:12,153 INFO L226 Difference]: Without dead ends: 659 [2021-12-22 08:35:12,153 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 08:35:12,154 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 59 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:12,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 169 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:12,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-12-22 08:35:12,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 481. [2021-12-22 08:35:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.7645833333333334) internal successors, (847), 480 states have internal predecessors, (847), 0 states have call successors, (0), 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 08:35:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 847 transitions. [2021-12-22 08:35:12,173 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 847 transitions. Word has length 24 [2021-12-22 08:35:12,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:12,175 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 847 transitions. [2021-12-22 08:35:12,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 08:35:12,175 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 847 transitions. [2021-12-22 08:35:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 08:35:12,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:12,180 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] [2021-12-22 08:35:12,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 08:35:12,181 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:12,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:12,183 INFO L85 PathProgramCache]: Analyzing trace with hash 666681880, now seen corresponding path program 1 times [2021-12-22 08:35:12,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:12,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942204275] [2021-12-22 08:35:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:12,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:12,207 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 08:35:12,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:12,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942204275] [2021-12-22 08:35:12,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942204275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:12,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:12,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:12,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326629197] [2021-12-22 08:35:12,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:12,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:12,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:12,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:12,209 INFO L87 Difference]: Start difference. First operand 481 states and 847 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 08:35:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:12,222 INFO L93 Difference]: Finished difference Result 1157 states and 2049 transitions. [2021-12-22 08:35:12,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:12,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-22 08:35:12,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:12,225 INFO L225 Difference]: With dead ends: 1157 [2021-12-22 08:35:12,225 INFO L226 Difference]: Without dead ends: 683 [2021-12-22 08:35:12,237 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 08:35:12,237 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 65 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:12,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 202 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-12-22 08:35:12,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 681. [2021-12-22 08:35:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.7573529411764706) internal successors, (1195), 680 states have internal predecessors, (1195), 0 states have call successors, (0), 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 08:35:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1195 transitions. [2021-12-22 08:35:12,249 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1195 transitions. Word has length 24 [2021-12-22 08:35:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:12,249 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 1195 transitions. [2021-12-22 08:35:12,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 08:35:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1195 transitions. [2021-12-22 08:35:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 08:35:12,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:12,251 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] [2021-12-22 08:35:12,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 08:35:12,251 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:12,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:12,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1186659581, now seen corresponding path program 1 times [2021-12-22 08:35:12,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:12,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106316382] [2021-12-22 08:35:12,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:12,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:12,270 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 08:35:12,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:12,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106316382] [2021-12-22 08:35:12,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106316382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:12,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:12,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:12,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588472018] [2021-12-22 08:35:12,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:12,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:12,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:12,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:12,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:12,282 INFO L87 Difference]: Start difference. First operand 681 states and 1195 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 08:35:12,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:12,296 INFO L93 Difference]: Finished difference Result 1029 states and 1801 transitions. [2021-12-22 08:35:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:12,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-22 08:35:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:12,299 INFO L225 Difference]: With dead ends: 1029 [2021-12-22 08:35:12,299 INFO L226 Difference]: Without dead ends: 695 [2021-12-22 08:35:12,300 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 08:35:12,301 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 67 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:12,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 212 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:12,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-12-22 08:35:12,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 693. [2021-12-22 08:35:12,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 1.7384393063583814) internal successors, (1203), 692 states have internal predecessors, (1203), 0 states have call successors, (0), 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 08:35:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1203 transitions. [2021-12-22 08:35:12,312 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1203 transitions. Word has length 25 [2021-12-22 08:35:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:12,312 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 1203 transitions. [2021-12-22 08:35:12,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 08:35:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1203 transitions. [2021-12-22 08:35:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 08:35:12,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:12,313 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] [2021-12-22 08:35:12,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 08:35:12,314 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:12,314 INFO L85 PathProgramCache]: Analyzing trace with hash -807485125, now seen corresponding path program 1 times [2021-12-22 08:35:12,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:12,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236271714] [2021-12-22 08:35:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:12,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:12,336 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 08:35:12,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:12,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236271714] [2021-12-22 08:35:12,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236271714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:12,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:12,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:12,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633007652] [2021-12-22 08:35:12,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:12,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:12,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:12,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:12,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:12,338 INFO L87 Difference]: Start difference. First operand 693 states and 1203 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 08:35:12,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:12,352 INFO L93 Difference]: Finished difference Result 1289 states and 2269 transitions. [2021-12-22 08:35:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:12,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-22 08:35:12,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:12,356 INFO L225 Difference]: With dead ends: 1289 [2021-12-22 08:35:12,356 INFO L226 Difference]: Without dead ends: 1287 [2021-12-22 08:35:12,356 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 08:35:12,357 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 56 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:12,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 167 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-12-22 08:35:12,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 965. [2021-12-22 08:35:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 1.704356846473029) internal successors, (1643), 964 states have internal predecessors, (1643), 0 states have call successors, (0), 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 08:35:12,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1643 transitions. [2021-12-22 08:35:12,374 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1643 transitions. Word has length 25 [2021-12-22 08:35:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:12,375 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 1643 transitions. [2021-12-22 08:35:12,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 08:35:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1643 transitions. [2021-12-22 08:35:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 08:35:12,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:12,377 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] [2021-12-22 08:35:12,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 08:35:12,378 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:12,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:12,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1899134269, now seen corresponding path program 1 times [2021-12-22 08:35:12,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:12,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370659659] [2021-12-22 08:35:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:12,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:12,406 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 08:35:12,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370659659] [2021-12-22 08:35:12,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370659659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:12,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:12,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:12,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471450289] [2021-12-22 08:35:12,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:12,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:12,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:12,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:12,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:12,407 INFO L87 Difference]: Start difference. First operand 965 states and 1643 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 08:35:12,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:12,428 INFO L93 Difference]: Finished difference Result 2297 states and 3933 transitions. [2021-12-22 08:35:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-22 08:35:12,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:12,432 INFO L225 Difference]: With dead ends: 2297 [2021-12-22 08:35:12,432 INFO L226 Difference]: Without dead ends: 1351 [2021-12-22 08:35:12,433 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 08:35:12,435 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 64 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:12,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 203 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:12,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-12-22 08:35:12,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1349. [2021-12-22 08:35:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 1.6995548961424332) internal successors, (2291), 1348 states have internal predecessors, (2291), 0 states have call successors, (0), 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 08:35:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 2291 transitions. [2021-12-22 08:35:12,468 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 2291 transitions. Word has length 25 [2021-12-22 08:35:12,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:12,469 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 2291 transitions. [2021-12-22 08:35:12,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 08:35:12,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 2291 transitions. [2021-12-22 08:35:12,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 08:35:12,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:12,470 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] [2021-12-22 08:35:12,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 08:35:12,470 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:12,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash 737978317, now seen corresponding path program 1 times [2021-12-22 08:35:12,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:12,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356044032] [2021-12-22 08:35:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:12,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:12,501 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 08:35:12,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:12,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356044032] [2021-12-22 08:35:12,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356044032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:12,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:12,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:12,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980490482] [2021-12-22 08:35:12,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:12,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:12,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:12,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:12,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:12,503 INFO L87 Difference]: Start difference. First operand 1349 states and 2291 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:12,525 INFO L93 Difference]: Finished difference Result 2025 states and 3429 transitions. [2021-12-22 08:35:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:12,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 08:35:12,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:12,529 INFO L225 Difference]: With dead ends: 2025 [2021-12-22 08:35:12,531 INFO L226 Difference]: Without dead ends: 1367 [2021-12-22 08:35:12,532 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 08:35:12,532 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 66 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:12,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 208 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-12-22 08:35:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1365. [2021-12-22 08:35:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.6796187683284458) internal successors, (2291), 1364 states have internal predecessors, (2291), 0 states have call successors, (0), 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 08:35:12,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2291 transitions. [2021-12-22 08:35:12,558 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2291 transitions. Word has length 26 [2021-12-22 08:35:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:12,563 INFO L470 AbstractCegarLoop]: Abstraction has 1365 states and 2291 transitions. [2021-12-22 08:35:12,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2291 transitions. [2021-12-22 08:35:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 08:35:12,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:12,565 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] [2021-12-22 08:35:12,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 08:35:12,565 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:12,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:12,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1256166389, now seen corresponding path program 1 times [2021-12-22 08:35:12,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:12,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590501332] [2021-12-22 08:35:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:12,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:12,605 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 08:35:12,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:12,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590501332] [2021-12-22 08:35:12,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590501332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:12,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:12,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:12,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719475430] [2021-12-22 08:35:12,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:12,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:12,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:12,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:12,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:12,608 INFO L87 Difference]: Start difference. First operand 1365 states and 2291 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:12,627 INFO L93 Difference]: Finished difference Result 2505 states and 4277 transitions. [2021-12-22 08:35:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:12,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 08:35:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:12,634 INFO L225 Difference]: With dead ends: 2505 [2021-12-22 08:35:12,635 INFO L226 Difference]: Without dead ends: 2503 [2021-12-22 08:35:12,637 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 08:35:12,638 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 53 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:12,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 165 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:12,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-12-22 08:35:12,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1925. [2021-12-22 08:35:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1924 states have (on average 1.6398128898128899) internal successors, (3155), 1924 states have internal predecessors, (3155), 0 states have call successors, (0), 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 08:35:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 3155 transitions. [2021-12-22 08:35:12,671 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 3155 transitions. Word has length 26 [2021-12-22 08:35:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:12,672 INFO L470 AbstractCegarLoop]: Abstraction has 1925 states and 3155 transitions. [2021-12-22 08:35:12,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:12,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 3155 transitions. [2021-12-22 08:35:12,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 08:35:12,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:12,675 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] [2021-12-22 08:35:12,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 08:35:12,675 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:12,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1450453005, now seen corresponding path program 1 times [2021-12-22 08:35:12,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:12,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076748750] [2021-12-22 08:35:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:12,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:12,708 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 08:35:12,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:12,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076748750] [2021-12-22 08:35:12,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076748750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:12,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:12,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:12,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197277236] [2021-12-22 08:35:12,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:12,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:12,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:12,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:12,711 INFO L87 Difference]: Start difference. First operand 1925 states and 3155 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:12,749 INFO L93 Difference]: Finished difference Result 4553 states and 7509 transitions. [2021-12-22 08:35:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:12,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 08:35:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:12,756 INFO L225 Difference]: With dead ends: 4553 [2021-12-22 08:35:12,756 INFO L226 Difference]: Without dead ends: 2663 [2021-12-22 08:35:12,760 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 08:35:12,761 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 63 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:12,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 204 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2021-12-22 08:35:12,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2661. [2021-12-22 08:35:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 1.637218045112782) internal successors, (4355), 2660 states have internal predecessors, (4355), 0 states have call successors, (0), 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 08:35:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 4355 transitions. [2021-12-22 08:35:12,815 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 4355 transitions. Word has length 26 [2021-12-22 08:35:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:12,816 INFO L470 AbstractCegarLoop]: Abstraction has 2661 states and 4355 transitions. [2021-12-22 08:35:12,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 4355 transitions. [2021-12-22 08:35:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 08:35:12,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:12,819 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] [2021-12-22 08:35:12,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 08:35:12,819 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash -286238638, now seen corresponding path program 1 times [2021-12-22 08:35:12,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:12,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808649854] [2021-12-22 08:35:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:12,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:12,850 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 08:35:12,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:12,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808649854] [2021-12-22 08:35:12,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808649854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:12,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:12,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:12,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424048369] [2021-12-22 08:35:12,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:12,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:12,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:12,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:12,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:12,853 INFO L87 Difference]: Start difference. First operand 2661 states and 4355 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 08:35:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:12,881 INFO L93 Difference]: Finished difference Result 3993 states and 6517 transitions. [2021-12-22 08:35:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:12,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-12-22 08:35:12,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:12,889 INFO L225 Difference]: With dead ends: 3993 [2021-12-22 08:35:12,889 INFO L226 Difference]: Without dead ends: 2695 [2021-12-22 08:35:12,891 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 08:35:12,891 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 65 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:12,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 204 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-12-22 08:35:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2693. [2021-12-22 08:35:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2692 states have (on average 1.6177563150074294) internal successors, (4355), 2692 states have internal predecessors, (4355), 0 states have call successors, (0), 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 08:35:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 4355 transitions. [2021-12-22 08:35:12,950 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 4355 transitions. Word has length 27 [2021-12-22 08:35:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:12,950 INFO L470 AbstractCegarLoop]: Abstraction has 2693 states and 4355 transitions. [2021-12-22 08:35:12,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 08:35:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 4355 transitions. [2021-12-22 08:35:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 08:35:12,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:12,952 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] [2021-12-22 08:35:12,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 08:35:12,953 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:12,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2014583952, now seen corresponding path program 1 times [2021-12-22 08:35:12,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:12,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883665623] [2021-12-22 08:35:12,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:12,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:12,967 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 08:35:12,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:12,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883665623] [2021-12-22 08:35:12,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883665623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:12,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:12,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:12,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131750416] [2021-12-22 08:35:12,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:12,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:12,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:12,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:12,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:12,969 INFO L87 Difference]: Start difference. First operand 2693 states and 4355 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 08:35:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:13,006 INFO L93 Difference]: Finished difference Result 4873 states and 8037 transitions. [2021-12-22 08:35:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:13,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-12-22 08:35:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:13,021 INFO L225 Difference]: With dead ends: 4873 [2021-12-22 08:35:13,021 INFO L226 Difference]: Without dead ends: 4871 [2021-12-22 08:35:13,023 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 08:35:13,023 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 50 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:13,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 163 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-12-22 08:35:13,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 3845. [2021-12-22 08:35:13,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3845 states, 3844 states have (on average 1.5741415192507804) internal successors, (6051), 3844 states have internal predecessors, (6051), 0 states have call successors, (0), 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 08:35:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3845 states to 3845 states and 6051 transitions. [2021-12-22 08:35:13,097 INFO L78 Accepts]: Start accepts. Automaton has 3845 states and 6051 transitions. Word has length 27 [2021-12-22 08:35:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:13,097 INFO L470 AbstractCegarLoop]: Abstraction has 3845 states and 6051 transitions. [2021-12-22 08:35:13,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 08:35:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3845 states and 6051 transitions. [2021-12-22 08:35:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 08:35:13,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:13,100 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] [2021-12-22 08:35:13,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 08:35:13,100 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:13,101 INFO L85 PathProgramCache]: Analyzing trace with hash 426236050, now seen corresponding path program 1 times [2021-12-22 08:35:13,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:13,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143426453] [2021-12-22 08:35:13,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:13,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:13,114 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 08:35:13,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:13,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143426453] [2021-12-22 08:35:13,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143426453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:13,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:13,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:13,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353364485] [2021-12-22 08:35:13,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:13,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:13,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:13,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:13,115 INFO L87 Difference]: Start difference. First operand 3845 states and 6051 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 08:35:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:13,188 INFO L93 Difference]: Finished difference Result 9033 states and 14309 transitions. [2021-12-22 08:35:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:13,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-12-22 08:35:13,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:13,201 INFO L225 Difference]: With dead ends: 9033 [2021-12-22 08:35:13,201 INFO L226 Difference]: Without dead ends: 5255 [2021-12-22 08:35:13,205 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 08:35:13,205 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 62 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:13,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 205 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:13,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5255 states. [2021-12-22 08:35:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5255 to 5253. [2021-12-22 08:35:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5253 states, 5252 states have (on average 1.5725437928408226) internal successors, (8259), 5252 states have internal predecessors, (8259), 0 states have call successors, (0), 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 08:35:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5253 states to 5253 states and 8259 transitions. [2021-12-22 08:35:13,304 INFO L78 Accepts]: Start accepts. Automaton has 5253 states and 8259 transitions. Word has length 27 [2021-12-22 08:35:13,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:13,304 INFO L470 AbstractCegarLoop]: Abstraction has 5253 states and 8259 transitions. [2021-12-22 08:35:13,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 08:35:13,305 INFO L276 IsEmpty]: Start isEmpty. Operand 5253 states and 8259 transitions. [2021-12-22 08:35:13,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 08:35:13,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:13,308 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] [2021-12-22 08:35:13,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 08:35:13,309 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:13,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1972192830, now seen corresponding path program 1 times [2021-12-22 08:35:13,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:13,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905124161] [2021-12-22 08:35:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:13,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:13,325 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 08:35:13,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:13,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905124161] [2021-12-22 08:35:13,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905124161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:13,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:13,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:13,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845045577] [2021-12-22 08:35:13,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:13,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:13,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:13,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:13,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:13,327 INFO L87 Difference]: Start difference. First operand 5253 states and 8259 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:13,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:13,399 INFO L93 Difference]: Finished difference Result 7881 states and 12357 transitions. [2021-12-22 08:35:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:13,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-22 08:35:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:13,406 INFO L225 Difference]: With dead ends: 7881 [2021-12-22 08:35:13,407 INFO L226 Difference]: Without dead ends: 5319 [2021-12-22 08:35:13,409 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 08:35:13,409 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 64 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:13,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 200 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:13,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2021-12-22 08:35:13,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5317. [2021-12-22 08:35:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5317 states, 5316 states have (on average 1.5536117381489842) internal successors, (8259), 5316 states have internal predecessors, (8259), 0 states have call successors, (0), 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 08:35:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 8259 transitions. [2021-12-22 08:35:13,545 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 8259 transitions. Word has length 28 [2021-12-22 08:35:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:13,546 INFO L470 AbstractCegarLoop]: Abstraction has 5317 states and 8259 transitions. [2021-12-22 08:35:13,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 8259 transitions. [2021-12-22 08:35:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 08:35:13,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:13,550 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] [2021-12-22 08:35:13,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 08:35:13,550 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:13,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:13,550 INFO L85 PathProgramCache]: Analyzing trace with hash 328629760, now seen corresponding path program 1 times [2021-12-22 08:35:13,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:13,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555045020] [2021-12-22 08:35:13,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:13,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:13,587 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 08:35:13,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:13,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555045020] [2021-12-22 08:35:13,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555045020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:13,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:13,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:13,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59196141] [2021-12-22 08:35:13,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:13,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:13,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:13,588 INFO L87 Difference]: Start difference. First operand 5317 states and 8259 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:13,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:13,661 INFO L93 Difference]: Finished difference Result 9481 states and 15045 transitions. [2021-12-22 08:35:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:13,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-22 08:35:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:13,676 INFO L225 Difference]: With dead ends: 9481 [2021-12-22 08:35:13,677 INFO L226 Difference]: Without dead ends: 9479 [2021-12-22 08:35:13,680 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 08:35:13,682 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 47 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:13,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 161 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9479 states. [2021-12-22 08:35:13,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9479 to 7685. [2021-12-22 08:35:13,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7685 states, 7684 states have (on average 1.5079385736595523) internal successors, (11587), 7684 states have internal predecessors, (11587), 0 states have call successors, (0), 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 08:35:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 11587 transitions. [2021-12-22 08:35:13,848 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 11587 transitions. Word has length 28 [2021-12-22 08:35:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:13,848 INFO L470 AbstractCegarLoop]: Abstraction has 7685 states and 11587 transitions. [2021-12-22 08:35:13,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 11587 transitions. [2021-12-22 08:35:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 08:35:13,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:13,855 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] [2021-12-22 08:35:13,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 08:35:13,855 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:13,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:13,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1259718142, now seen corresponding path program 1 times [2021-12-22 08:35:13,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:13,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724391758] [2021-12-22 08:35:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:13,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:13,888 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 08:35:13,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:13,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724391758] [2021-12-22 08:35:13,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724391758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:13,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:13,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:13,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642641710] [2021-12-22 08:35:13,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:13,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:13,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:13,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:13,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:13,889 INFO L87 Difference]: Start difference. First operand 7685 states and 11587 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:13,972 INFO L93 Difference]: Finished difference Result 17929 states and 27205 transitions. [2021-12-22 08:35:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:13,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-22 08:35:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:13,990 INFO L225 Difference]: With dead ends: 17929 [2021-12-22 08:35:13,990 INFO L226 Difference]: Without dead ends: 10375 [2021-12-22 08:35:14,000 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 08:35:14,001 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 61 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:14,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 206 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:14,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10375 states. [2021-12-22 08:35:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10375 to 10373. [2021-12-22 08:35:14,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10373 states, 10372 states have (on average 1.5058812186656383) internal successors, (15619), 10372 states have internal predecessors, (15619), 0 states have call successors, (0), 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 08:35:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10373 states to 10373 states and 15619 transitions. [2021-12-22 08:35:14,217 INFO L78 Accepts]: Start accepts. Automaton has 10373 states and 15619 transitions. Word has length 28 [2021-12-22 08:35:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:14,217 INFO L470 AbstractCegarLoop]: Abstraction has 10373 states and 15619 transitions. [2021-12-22 08:35:14,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:14,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10373 states and 15619 transitions. [2021-12-22 08:35:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 08:35:14,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:14,224 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] [2021-12-22 08:35:14,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 08:35:14,224 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:14,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1597802407, now seen corresponding path program 1 times [2021-12-22 08:35:14,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:14,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355133806] [2021-12-22 08:35:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:14,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:14,240 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 08:35:14,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:14,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355133806] [2021-12-22 08:35:14,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355133806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:14,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:14,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:14,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624529600] [2021-12-22 08:35:14,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:14,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:14,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:14,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:14,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:14,242 INFO L87 Difference]: Start difference. First operand 10373 states and 15619 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 08:35:14,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:14,350 INFO L93 Difference]: Finished difference Result 15561 states and 23365 transitions. [2021-12-22 08:35:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:14,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-22 08:35:14,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:14,365 INFO L225 Difference]: With dead ends: 15561 [2021-12-22 08:35:14,365 INFO L226 Difference]: Without dead ends: 10503 [2021-12-22 08:35:14,369 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 08:35:14,370 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 63 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:14,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 196 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:14,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10503 states. [2021-12-22 08:35:14,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10503 to 10501. [2021-12-22 08:35:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10501 states, 10500 states have (on average 1.4875238095238095) internal successors, (15619), 10500 states have internal predecessors, (15619), 0 states have call successors, (0), 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 08:35:14,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10501 states to 10501 states and 15619 transitions. [2021-12-22 08:35:14,544 INFO L78 Accepts]: Start accepts. Automaton has 10501 states and 15619 transitions. Word has length 29 [2021-12-22 08:35:14,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:14,544 INFO L470 AbstractCegarLoop]: Abstraction has 10501 states and 15619 transitions. [2021-12-22 08:35:14,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 08:35:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 10501 states and 15619 transitions. [2021-12-22 08:35:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 08:35:14,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:14,553 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] [2021-12-22 08:35:14,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 08:35:14,553 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:14,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:14,554 INFO L85 PathProgramCache]: Analyzing trace with hash -396342299, now seen corresponding path program 1 times [2021-12-22 08:35:14,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:14,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758793455] [2021-12-22 08:35:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:14,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:14,569 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 08:35:14,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:14,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758793455] [2021-12-22 08:35:14,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758793455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:14,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:14,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:14,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966951372] [2021-12-22 08:35:14,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:14,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:14,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:14,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:14,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:14,572 INFO L87 Difference]: Start difference. First operand 10501 states and 15619 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 08:35:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:14,700 INFO L93 Difference]: Finished difference Result 18441 states and 28037 transitions. [2021-12-22 08:35:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:14,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-22 08:35:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:14,725 INFO L225 Difference]: With dead ends: 18441 [2021-12-22 08:35:14,725 INFO L226 Difference]: Without dead ends: 18439 [2021-12-22 08:35:14,729 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 08:35:14,730 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 44 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:14,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 159 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:14,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18439 states. [2021-12-22 08:35:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18439 to 15365. [2021-12-22 08:35:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15365 states, 15364 states have (on average 1.4414865920333246) internal successors, (22147), 15364 states have internal predecessors, (22147), 0 states have call successors, (0), 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 08:35:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15365 states to 15365 states and 22147 transitions. [2021-12-22 08:35:14,941 INFO L78 Accepts]: Start accepts. Automaton has 15365 states and 22147 transitions. Word has length 29 [2021-12-22 08:35:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:14,941 INFO L470 AbstractCegarLoop]: Abstraction has 15365 states and 22147 transitions. [2021-12-22 08:35:14,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 08:35:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 15365 states and 22147 transitions. [2021-12-22 08:35:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 08:35:14,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:14,955 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] [2021-12-22 08:35:14,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 08:35:14,956 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:14,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:14,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1984690201, now seen corresponding path program 1 times [2021-12-22 08:35:14,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:14,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862760394] [2021-12-22 08:35:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:14,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:14,973 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 08:35:14,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:14,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862760394] [2021-12-22 08:35:14,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862760394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:14,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:14,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:14,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166531849] [2021-12-22 08:35:14,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:14,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:14,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:14,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:14,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:14,975 INFO L87 Difference]: Start difference. First operand 15365 states and 22147 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 08:35:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:15,149 INFO L93 Difference]: Finished difference Result 35593 states and 51589 transitions. [2021-12-22 08:35:15,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:15,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-22 08:35:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:15,178 INFO L225 Difference]: With dead ends: 35593 [2021-12-22 08:35:15,179 INFO L226 Difference]: Without dead ends: 20487 [2021-12-22 08:35:15,190 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 08:35:15,191 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 60 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:15,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 207 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20487 states. [2021-12-22 08:35:15,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20487 to 20485. [2021-12-22 08:35:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20485 states, 20484 states have (on average 1.4373657488771725) internal successors, (29443), 20484 states have internal predecessors, (29443), 0 states have call successors, (0), 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 08:35:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20485 states to 20485 states and 29443 transitions. [2021-12-22 08:35:15,511 INFO L78 Accepts]: Start accepts. Automaton has 20485 states and 29443 transitions. Word has length 29 [2021-12-22 08:35:15,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:15,511 INFO L470 AbstractCegarLoop]: Abstraction has 20485 states and 29443 transitions. [2021-12-22 08:35:15,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 08:35:15,511 INFO L276 IsEmpty]: Start isEmpty. Operand 20485 states and 29443 transitions. [2021-12-22 08:35:15,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 08:35:15,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:15,522 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] [2021-12-22 08:35:15,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 08:35:15,522 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:15,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:15,523 INFO L85 PathProgramCache]: Analyzing trace with hash 598505399, now seen corresponding path program 1 times [2021-12-22 08:35:15,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:15,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344471254] [2021-12-22 08:35:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:15,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:15,536 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 08:35:15,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:15,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344471254] [2021-12-22 08:35:15,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344471254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:15,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:15,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:15,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344640538] [2021-12-22 08:35:15,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:15,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:15,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:15,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:15,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:15,539 INFO L87 Difference]: Start difference. First operand 20485 states and 29443 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 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 08:35:15,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:15,662 INFO L93 Difference]: Finished difference Result 30729 states and 44037 transitions. [2021-12-22 08:35:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:15,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-22 08:35:15,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:15,690 INFO L225 Difference]: With dead ends: 30729 [2021-12-22 08:35:15,690 INFO L226 Difference]: Without dead ends: 20743 [2021-12-22 08:35:15,702 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 08:35:15,702 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 62 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:15,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 192 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20743 states. [2021-12-22 08:35:16,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20743 to 20741. [2021-12-22 08:35:16,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20741 states, 20740 states have (on average 1.4196239151398264) internal successors, (29443), 20740 states have internal predecessors, (29443), 0 states have call successors, (0), 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 08:35:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20741 states to 20741 states and 29443 transitions. [2021-12-22 08:35:16,084 INFO L78 Accepts]: Start accepts. Automaton has 20741 states and 29443 transitions. Word has length 30 [2021-12-22 08:35:16,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:16,084 INFO L470 AbstractCegarLoop]: Abstraction has 20741 states and 29443 transitions. [2021-12-22 08:35:16,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 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 08:35:16,084 INFO L276 IsEmpty]: Start isEmpty. Operand 20741 states and 29443 transitions. [2021-12-22 08:35:16,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 08:35:16,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:16,096 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] [2021-12-22 08:35:16,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 08:35:16,096 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1395639307, now seen corresponding path program 1 times [2021-12-22 08:35:16,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:16,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365374672] [2021-12-22 08:35:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:16,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:16,109 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 08:35:16,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:16,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365374672] [2021-12-22 08:35:16,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365374672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:16,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:16,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:16,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867247376] [2021-12-22 08:35:16,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:16,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:16,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:16,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:16,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:16,111 INFO L87 Difference]: Start difference. First operand 20741 states and 29443 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 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 08:35:16,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:16,308 INFO L93 Difference]: Finished difference Result 35849 states and 51973 transitions. [2021-12-22 08:35:16,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:16,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-22 08:35:16,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:16,434 INFO L225 Difference]: With dead ends: 35849 [2021-12-22 08:35:16,435 INFO L226 Difference]: Without dead ends: 35847 [2021-12-22 08:35:16,438 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 08:35:16,439 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 41 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:16,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 157 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35847 states. [2021-12-22 08:35:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35847 to 30725. [2021-12-22 08:35:16,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30725 states, 30724 states have (on average 1.3749186303866685) internal successors, (42243), 30724 states have internal predecessors, (42243), 0 states have call successors, (0), 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 08:35:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30725 states to 30725 states and 42243 transitions. [2021-12-22 08:35:16,790 INFO L78 Accepts]: Start accepts. Automaton has 30725 states and 42243 transitions. Word has length 30 [2021-12-22 08:35:16,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:16,790 INFO L470 AbstractCegarLoop]: Abstraction has 30725 states and 42243 transitions. [2021-12-22 08:35:16,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 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 08:35:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 30725 states and 42243 transitions. [2021-12-22 08:35:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 08:35:16,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:16,810 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] [2021-12-22 08:35:16,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 08:35:16,811 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:16,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:16,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1310980087, now seen corresponding path program 1 times [2021-12-22 08:35:16,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:16,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800834136] [2021-12-22 08:35:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:16,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:16,823 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 08:35:16,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:16,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800834136] [2021-12-22 08:35:16,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800834136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:16,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:16,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:16,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66652996] [2021-12-22 08:35:16,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:16,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:16,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:16,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:16,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:16,825 INFO L87 Difference]: Start difference. First operand 30725 states and 42243 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 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 08:35:17,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:17,164 INFO L93 Difference]: Finished difference Result 70665 states and 97541 transitions. [2021-12-22 08:35:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:17,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-22 08:35:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:17,207 INFO L225 Difference]: With dead ends: 70665 [2021-12-22 08:35:17,207 INFO L226 Difference]: Without dead ends: 40455 [2021-12-22 08:35:17,227 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 08:35:17,228 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 59 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:17,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 208 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40455 states. [2021-12-22 08:35:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40455 to 40453. [2021-12-22 08:35:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40453 states, 40452 states have (on average 1.367027588252744) internal successors, (55299), 40452 states have internal predecessors, (55299), 0 states have call successors, (0), 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 08:35:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40453 states to 40453 states and 55299 transitions. [2021-12-22 08:35:17,717 INFO L78 Accepts]: Start accepts. Automaton has 40453 states and 55299 transitions. Word has length 30 [2021-12-22 08:35:17,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:17,718 INFO L470 AbstractCegarLoop]: Abstraction has 40453 states and 55299 transitions. [2021-12-22 08:35:17,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 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 08:35:17,718 INFO L276 IsEmpty]: Start isEmpty. Operand 40453 states and 55299 transitions. [2021-12-22 08:35:17,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 08:35:17,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:17,739 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] [2021-12-22 08:35:17,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 08:35:17,739 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash -314930436, now seen corresponding path program 1 times [2021-12-22 08:35:17,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:17,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573188195] [2021-12-22 08:35:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:17,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:17,755 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 08:35:17,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:17,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573188195] [2021-12-22 08:35:17,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573188195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:17,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:17,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:17,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039240318] [2021-12-22 08:35:17,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:17,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:17,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:17,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:17,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:17,758 INFO L87 Difference]: Start difference. First operand 40453 states and 55299 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 08:35:18,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:18,084 INFO L93 Difference]: Finished difference Result 60681 states and 82693 transitions. [2021-12-22 08:35:18,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:18,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-12-22 08:35:18,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:18,126 INFO L225 Difference]: With dead ends: 60681 [2021-12-22 08:35:18,127 INFO L226 Difference]: Without dead ends: 40967 [2021-12-22 08:35:18,140 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 08:35:18,141 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 61 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:18,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 188 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40967 states. [2021-12-22 08:35:18,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40967 to 40965. [2021-12-22 08:35:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40965 states, 40964 states have (on average 1.3499414119714872) internal successors, (55299), 40964 states have internal predecessors, (55299), 0 states have call successors, (0), 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 08:35:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40965 states to 40965 states and 55299 transitions. [2021-12-22 08:35:18,615 INFO L78 Accepts]: Start accepts. Automaton has 40965 states and 55299 transitions. Word has length 31 [2021-12-22 08:35:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:18,616 INFO L470 AbstractCegarLoop]: Abstraction has 40965 states and 55299 transitions. [2021-12-22 08:35:18,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 08:35:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 40965 states and 55299 transitions. [2021-12-22 08:35:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 08:35:18,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:18,633 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] [2021-12-22 08:35:18,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 08:35:18,633 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:18,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:18,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1985892154, now seen corresponding path program 1 times [2021-12-22 08:35:18,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:18,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716065442] [2021-12-22 08:35:18,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:18,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:18,647 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 08:35:18,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:18,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716065442] [2021-12-22 08:35:18,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716065442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:18,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:18,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:18,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551965619] [2021-12-22 08:35:18,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:18,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:18,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:18,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:18,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:18,649 INFO L87 Difference]: Start difference. First operand 40965 states and 55299 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 08:35:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:19,219 INFO L93 Difference]: Finished difference Result 119817 states and 159749 transitions. [2021-12-22 08:35:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:19,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-12-22 08:35:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:19,310 INFO L225 Difference]: With dead ends: 119817 [2021-12-22 08:35:19,310 INFO L226 Difference]: Without dead ends: 79879 [2021-12-22 08:35:19,349 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 08:35:19,349 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 59 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:19,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 175 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79879 states. [2021-12-22 08:35:20,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79879 to 79877. [2021-12-22 08:35:20,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79877 states, 79876 states have (on average 1.3076643797886724) internal successors, (104451), 79876 states have internal predecessors, (104451), 0 states have call successors, (0), 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 08:35:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79877 states to 79877 states and 104451 transitions. [2021-12-22 08:35:20,572 INFO L78 Accepts]: Start accepts. Automaton has 79877 states and 104451 transitions. Word has length 31 [2021-12-22 08:35:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:20,573 INFO L470 AbstractCegarLoop]: Abstraction has 79877 states and 104451 transitions. [2021-12-22 08:35:20,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 08:35:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 79877 states and 104451 transitions. [2021-12-22 08:35:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 08:35:20,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:20,609 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] [2021-12-22 08:35:20,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-22 08:35:20,609 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:20,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:20,610 INFO L85 PathProgramCache]: Analyzing trace with hash -720727240, now seen corresponding path program 1 times [2021-12-22 08:35:20,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:20,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179123063] [2021-12-22 08:35:20,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:20,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:20,627 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 08:35:20,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:20,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179123063] [2021-12-22 08:35:20,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179123063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:20,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:20,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:20,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420689165] [2021-12-22 08:35:20,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:20,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:20,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:20,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:20,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:20,629 INFO L87 Difference]: Start difference. First operand 79877 states and 104451 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 08:35:21,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:21,224 INFO L93 Difference]: Finished difference Result 88073 states and 118789 transitions. [2021-12-22 08:35:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:21,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-12-22 08:35:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:21,332 INFO L225 Difference]: With dead ends: 88073 [2021-12-22 08:35:21,333 INFO L226 Difference]: Without dead ends: 88071 [2021-12-22 08:35:21,360 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 08:35:21,361 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 38 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:21,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 202 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:21,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88071 states. [2021-12-22 08:35:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88071 to 79877. [2021-12-22 08:35:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79877 states, 79876 states have (on average 1.2948445089889329) internal successors, (103427), 79876 states have internal predecessors, (103427), 0 states have call successors, (0), 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 08:35:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79877 states to 79877 states and 103427 transitions. [2021-12-22 08:35:22,924 INFO L78 Accepts]: Start accepts. Automaton has 79877 states and 103427 transitions. Word has length 31 [2021-12-22 08:35:22,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:22,924 INFO L470 AbstractCegarLoop]: Abstraction has 79877 states and 103427 transitions. [2021-12-22 08:35:22,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 08:35:22,924 INFO L276 IsEmpty]: Start isEmpty. Operand 79877 states and 103427 transitions. [2021-12-22 08:35:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 08:35:22,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:22,959 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] [2021-12-22 08:35:22,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-22 08:35:22,960 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:22,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1433330092, now seen corresponding path program 1 times [2021-12-22 08:35:22,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:22,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505691971] [2021-12-22 08:35:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:22,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:22,972 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 08:35:22,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:22,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505691971] [2021-12-22 08:35:22,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505691971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:22,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:22,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:22,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23112333] [2021-12-22 08:35:22,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:22,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:22,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:22,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:22,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:22,975 INFO L87 Difference]: Start difference. First operand 79877 states and 103427 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 08:35:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:24,005 INFO L93 Difference]: Finished difference Result 134153 states and 176133 transitions. [2021-12-22 08:35:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:24,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-12-22 08:35:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:24,145 INFO L225 Difference]: With dead ends: 134153 [2021-12-22 08:35:24,145 INFO L226 Difference]: Without dead ends: 134151 [2021-12-22 08:35:24,168 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 08:35:24,168 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 35 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:24,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 153 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:24,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134151 states. [2021-12-22 08:35:25,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134151 to 121861. [2021-12-22 08:35:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121861 states, 121860 states have (on average 1.2604874446085672) internal successors, (153603), 121860 states have internal predecessors, (153603), 0 states have call successors, (0), 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 08:35:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121861 states to 121861 states and 153603 transitions. [2021-12-22 08:35:25,797 INFO L78 Accepts]: Start accepts. Automaton has 121861 states and 153603 transitions. Word has length 32 [2021-12-22 08:35:25,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:25,797 INFO L470 AbstractCegarLoop]: Abstraction has 121861 states and 153603 transitions. [2021-12-22 08:35:25,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 08:35:25,797 INFO L276 IsEmpty]: Start isEmpty. Operand 121861 states and 153603 transitions. [2021-12-22 08:35:25,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 08:35:25,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:25,854 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] [2021-12-22 08:35:25,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-22 08:35:25,854 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:25,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:25,854 INFO L85 PathProgramCache]: Analyzing trace with hash -155017810, now seen corresponding path program 1 times [2021-12-22 08:35:25,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:25,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885249280] [2021-12-22 08:35:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:25,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:25,865 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 08:35:25,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:25,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885249280] [2021-12-22 08:35:25,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885249280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:25,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:25,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:25,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435091398] [2021-12-22 08:35:25,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:25,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:25,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:25,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:25,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:25,867 INFO L87 Difference]: Start difference. First operand 121861 states and 153603 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 08:35:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:27,459 INFO L93 Difference]: Finished difference Result 277513 states and 350213 transitions. [2021-12-22 08:35:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:27,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-12-22 08:35:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:27,623 INFO L225 Difference]: With dead ends: 277513 [2021-12-22 08:35:27,623 INFO L226 Difference]: Without dead ends: 156679 [2021-12-22 08:35:27,664 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 08:35:27,664 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 57 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:27,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 210 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:27,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156679 states. [2021-12-22 08:35:29,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156679 to 156677. [2021-12-22 08:35:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156677 states, 156676 states have (on average 1.2418175087441599) internal successors, (194563), 156676 states have internal predecessors, (194563), 0 states have call successors, (0), 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 08:35:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156677 states to 156677 states and 194563 transitions. [2021-12-22 08:35:30,183 INFO L78 Accepts]: Start accepts. Automaton has 156677 states and 194563 transitions. Word has length 32 [2021-12-22 08:35:30,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:30,183 INFO L470 AbstractCegarLoop]: Abstraction has 156677 states and 194563 transitions. [2021-12-22 08:35:30,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 08:35:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 156677 states and 194563 transitions. [2021-12-22 08:35:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 08:35:30,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:30,262 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] [2021-12-22 08:35:30,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-22 08:35:30,263 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:30,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:30,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1483775695, now seen corresponding path program 1 times [2021-12-22 08:35:30,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:30,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059038025] [2021-12-22 08:35:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:30,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:30,274 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 08:35:30,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:30,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059038025] [2021-12-22 08:35:30,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059038025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:30,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:30,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:30,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467856938] [2021-12-22 08:35:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:30,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:30,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:30,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:30,276 INFO L87 Difference]: Start difference. First operand 156677 states and 194563 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 08:35:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:31,573 INFO L93 Difference]: Finished difference Result 236553 states and 293893 transitions. [2021-12-22 08:35:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:31,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-12-22 08:35:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:31,753 INFO L225 Difference]: With dead ends: 236553 [2021-12-22 08:35:31,753 INFO L226 Difference]: Without dead ends: 159751 [2021-12-22 08:35:31,785 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 08:35:31,786 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 59 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:31,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 180 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:31,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159751 states. [2021-12-22 08:35:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159751 to 159749. [2021-12-22 08:35:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159749 states, 159748 states have (on average 1.2307571925783107) internal successors, (196611), 159748 states have internal predecessors, (196611), 0 states have call successors, (0), 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 08:35:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159749 states to 159749 states and 196611 transitions. [2021-12-22 08:35:34,231 INFO L78 Accepts]: Start accepts. Automaton has 159749 states and 196611 transitions. Word has length 33 [2021-12-22 08:35:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:34,231 INFO L470 AbstractCegarLoop]: Abstraction has 159749 states and 196611 transitions. [2021-12-22 08:35:34,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 08:35:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 159749 states and 196611 transitions. [2021-12-22 08:35:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 08:35:34,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:34,303 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] [2021-12-22 08:35:34,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-22 08:35:34,304 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:34,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:34,304 INFO L85 PathProgramCache]: Analyzing trace with hash -510369011, now seen corresponding path program 1 times [2021-12-22 08:35:34,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:34,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346068854] [2021-12-22 08:35:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:34,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:34,314 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 08:35:34,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:34,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346068854] [2021-12-22 08:35:34,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346068854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:34,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:34,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:34,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314562117] [2021-12-22 08:35:34,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:34,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:34,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:34,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:34,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:34,316 INFO L87 Difference]: Start difference. First operand 159749 states and 196611 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 08:35:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:36,287 INFO L93 Difference]: Finished difference Result 262153 states and 323589 transitions. [2021-12-22 08:35:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-12-22 08:35:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:36,717 INFO L225 Difference]: With dead ends: 262153 [2021-12-22 08:35:36,717 INFO L226 Difference]: Without dead ends: 262151 [2021-12-22 08:35:36,747 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 08:35:36,748 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 32 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:36,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 151 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:36,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262151 states. [2021-12-22 08:35:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262151 to 245765. [2021-12-22 08:35:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245765 states, 245764 states have (on average 1.1999926759004573) internal successors, (294915), 245764 states have internal predecessors, (294915), 0 states have call successors, (0), 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 08:35:40,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245765 states to 245765 states and 294915 transitions. [2021-12-22 08:35:40,354 INFO L78 Accepts]: Start accepts. Automaton has 245765 states and 294915 transitions. Word has length 33 [2021-12-22 08:35:40,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:40,355 INFO L470 AbstractCegarLoop]: Abstraction has 245765 states and 294915 transitions. [2021-12-22 08:35:40,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 08:35:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 245765 states and 294915 transitions. [2021-12-22 08:35:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 08:35:40,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:40,528 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] [2021-12-22 08:35:40,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-22 08:35:40,528 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:40,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:40,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2098716913, now seen corresponding path program 1 times [2021-12-22 08:35:40,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:40,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87336591] [2021-12-22 08:35:40,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:40,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:40,543 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 08:35:40,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:40,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87336591] [2021-12-22 08:35:40,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87336591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:40,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:40,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:40,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706160344] [2021-12-22 08:35:40,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:40,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:40,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:40,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:40,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:40,545 INFO L87 Difference]: Start difference. First operand 245765 states and 294915 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 08:35:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:43,426 INFO L93 Difference]: Finished difference Result 552969 states and 659461 transitions. [2021-12-22 08:35:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:43,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-12-22 08:35:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:43,794 INFO L225 Difference]: With dead ends: 552969 [2021-12-22 08:35:43,794 INFO L226 Difference]: Without dead ends: 311303 [2021-12-22 08:35:43,897 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 08:35:43,897 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 56 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:43,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 211 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:44,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311303 states.