./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/array-examples/standard_allDiff2_ground.i -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 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-15 23:25:23,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 23:25:23,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 23:25:23,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 23:25:23,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 23:25:23,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 23:25:23,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 23:25:23,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 23:25:23,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 23:25:23,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 23:25:23,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 23:25:23,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 23:25:23,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 23:25:23,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 23:25:23,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 23:25:23,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 23:25:23,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 23:25:23,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 23:25:23,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 23:25:23,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 23:25:23,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 23:25:23,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 23:25:23,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 23:25:23,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 23:25:23,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 23:25:23,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 23:25:23,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 23:25:23,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 23:25:23,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 23:25:23,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 23:25:23,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 23:25:23,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 23:25:23,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 23:25:23,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 23:25:23,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 23:25:23,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 23:25:23,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 23:25:23,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 23:25:23,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 23:25:23,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 23:25:23,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 23:25:23,635 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 23:25:23,666 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 23:25:23,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 23:25:23,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 23:25:23,667 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 23:25:23,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 23:25:23,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 23:25:23,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 23:25:23,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 23:25:23,668 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 23:25:23,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 23:25:23,669 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 23:25:23,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 23:25:23,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 23:25:23,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 23:25:23,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 23:25:23,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 23:25:23,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 23:25:23,670 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 23:25:23,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 23:25:23,670 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 23:25:23,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 23:25:23,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 23:25:23,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 23:25:23,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 23:25:23,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:25:23,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 23:25:23,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 23:25:23,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 23:25:23,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 23:25:23,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 23:25:23,672 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 23:25:23,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 23:25:23,673 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 23:25:23,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 23:25:23,673 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 23:25:23,673 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 [2023-02-15 23:25:23,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 23:25:23,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 23:25:23,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 23:25:23,894 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 23:25:23,895 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 23:25:23,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2023-02-15 23:25:24,877 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 23:25:25,085 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 23:25:25,086 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2023-02-15 23:25:25,092 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5718544f2/7db162fca95245febeaf0a8bdb6b2f6d/FLAG67b5f5bdd [2023-02-15 23:25:25,113 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5718544f2/7db162fca95245febeaf0a8bdb6b2f6d [2023-02-15 23:25:25,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 23:25:25,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 23:25:25,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 23:25:25,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 23:25:25,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 23:25:25,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:25:25" (1/1) ... [2023-02-15 23:25:25,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5bdf9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25, skipping insertion in model container [2023-02-15 23:25:25,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:25:25" (1/1) ... [2023-02-15 23:25:25,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 23:25:25,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 23:25:25,258 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2023-02-15 23:25:25,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:25:25,275 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 23:25:25,283 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2023-02-15 23:25:25,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:25:25,302 INFO L208 MainTranslator]: Completed translation [2023-02-15 23:25:25,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25 WrapperNode [2023-02-15 23:25:25,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 23:25:25,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 23:25:25,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 23:25:25,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 23:25:25,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25" (1/1) ... [2023-02-15 23:25:25,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25" (1/1) ... [2023-02-15 23:25:25,326 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-02-15 23:25:25,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 23:25:25,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 23:25:25,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 23:25:25,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 23:25:25,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25" (1/1) ... [2023-02-15 23:25:25,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25" (1/1) ... [2023-02-15 23:25:25,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25" (1/1) ... [2023-02-15 23:25:25,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25" (1/1) ... [2023-02-15 23:25:25,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25" (1/1) ... [2023-02-15 23:25:25,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25" (1/1) ... [2023-02-15 23:25:25,342 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25" (1/1) ... [2023-02-15 23:25:25,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25" (1/1) ... [2023-02-15 23:25:25,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 23:25:25,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 23:25:25,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 23:25:25,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 23:25:25,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25" (1/1) ... [2023-02-15 23:25:25,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:25:25,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:25,399 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) [2023-02-15 23:25:25,401 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 [2023-02-15 23:25:25,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 23:25:25,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 23:25:25,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 23:25:25,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 23:25:25,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 23:25:25,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 23:25:25,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 23:25:25,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 23:25:25,482 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 23:25:25,484 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 23:25:25,602 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 23:25:25,606 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 23:25:25,606 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-15 23:25:25,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:25:25 BoogieIcfgContainer [2023-02-15 23:25:25,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 23:25:25,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 23:25:25,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 23:25:25,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 23:25:25,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:25:25" (1/3) ... [2023-02-15 23:25:25,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35225f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:25:25, skipping insertion in model container [2023-02-15 23:25:25,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:25" (2/3) ... [2023-02-15 23:25:25,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35225f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:25:25, skipping insertion in model container [2023-02-15 23:25:25,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:25:25" (3/3) ... [2023-02-15 23:25:25,614 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2023-02-15 23:25:25,633 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 23:25:25,634 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 23:25:25,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 23:25:25,674 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@52bede6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 23:25:25,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 23:25:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 23:25:25,681 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:25,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:25,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:25,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:25,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1932701392, now seen corresponding path program 1 times [2023-02-15 23:25:25,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:25,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111293082] [2023-02-15 23:25:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:25,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:25:25,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:25,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111293082] [2023-02-15 23:25:25,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111293082] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:25:25,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 23:25:25,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 23:25:25,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964075230] [2023-02-15 23:25:25,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:25:25,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 23:25:25,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 23:25:25,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 23:25:25,867 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 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 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:25,912 INFO L93 Difference]: Finished difference Result 44 states and 68 transitions. [2023-02-15 23:25:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 23:25:25,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-02-15 23:25:25,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:25,928 INFO L225 Difference]: With dead ends: 44 [2023-02-15 23:25:25,928 INFO L226 Difference]: Without dead ends: 21 [2023-02-15 23:25:25,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 23:25:25,932 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:25,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:25:25,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-15 23:25:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-02-15 23:25:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2023-02-15 23:25:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-02-15 23:25:25,957 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2023-02-15 23:25:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:25,958 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-02-15 23:25:25,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-02-15 23:25:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 23:25:25,959 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:25,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:25,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 23:25:25,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:25,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1277503826, now seen corresponding path program 1 times [2023-02-15 23:25:25,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:25,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31116187] [2023-02-15 23:25:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:25,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:25:26,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:26,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31116187] [2023-02-15 23:25:26,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31116187] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:25:26,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556214062] [2023-02-15 23:25:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:26,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:26,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:26,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:25:26,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 23:25:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:26,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 23:25:26,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:25:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 23:25:26,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 23:25:26,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556214062] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:25:26,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 23:25:26,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-02-15 23:25:26,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946933390] [2023-02-15 23:25:26,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:25:26,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 23:25:26,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:26,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 23:25:26,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 23:25:26,136 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:26,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:26,162 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-02-15 23:25:26,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 23:25:26,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2023-02-15 23:25:26,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:26,163 INFO L225 Difference]: With dead ends: 35 [2023-02-15 23:25:26,163 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 23:25:26,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 23:25:26,164 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:26,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:25:26,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 23:25:26,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2023-02-15 23:25:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2023-02-15 23:25:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-02-15 23:25:26,167 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2023-02-15 23:25:26,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:26,168 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-02-15 23:25:26,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:26,168 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-02-15 23:25:26,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 23:25:26,168 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:26,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:26,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 23:25:26,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:26,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:26,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1548598205, now seen corresponding path program 1 times [2023-02-15 23:25:26,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:26,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944917644] [2023-02-15 23:25:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:26,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 23:25:26,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:26,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944917644] [2023-02-15 23:25:26,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944917644] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:25:26,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371675091] [2023-02-15 23:25:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:26,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:26,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:26,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:25:26,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 23:25:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:26,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 23:25:26,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:25:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 23:25:26,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:25:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 23:25:26,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371675091] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:25:26,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:25:26,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 23:25:26,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283726858] [2023-02-15 23:25:26,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:25:26,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 23:25:26,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:26,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 23:25:26,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 23:25:26,642 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2023-02-15 23:25:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:26,698 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2023-02-15 23:25:26,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 23:25:26,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 15 [2023-02-15 23:25:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:26,699 INFO L225 Difference]: With dead ends: 71 [2023-02-15 23:25:26,701 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 23:25:26,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 23:25:26,702 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:26,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 62 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:25:26,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 23:25:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 27. [2023-02-15 23:25:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2023-02-15 23:25:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-02-15 23:25:26,708 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2023-02-15 23:25:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:26,708 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-02-15 23:25:26,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2023-02-15 23:25:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-02-15 23:25:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 23:25:26,709 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:26,709 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:26,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 23:25:26,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 23:25:26,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:26,917 INFO L85 PathProgramCache]: Analyzing trace with hash 515426679, now seen corresponding path program 2 times [2023-02-15 23:25:26,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:26,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168918611] [2023-02-15 23:25:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:26,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 23:25:27,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:27,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168918611] [2023-02-15 23:25:27,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168918611] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:25:27,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 23:25:27,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 23:25:27,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455409432] [2023-02-15 23:25:27,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:25:27,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 23:25:27,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:27,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 23:25:27,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 23:25:27,006 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:27,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:27,035 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-15 23:25:27,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 23:25:27,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2023-02-15 23:25:27,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:27,036 INFO L225 Difference]: With dead ends: 46 [2023-02-15 23:25:27,036 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 23:25:27,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 23:25:27,038 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:27,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 46 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:25:27,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 23:25:27,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-02-15 23:25:27,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2023-02-15 23:25:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-02-15 23:25:27,045 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 21 [2023-02-15 23:25:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:27,045 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-02-15 23:25:27,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-02-15 23:25:27,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 23:25:27,046 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:27,046 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:27,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 23:25:27,046 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:27,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1658369263, now seen corresponding path program 1 times [2023-02-15 23:25:27,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:27,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078071157] [2023-02-15 23:25:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:27,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 23:25:27,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:27,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078071157] [2023-02-15 23:25:27,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078071157] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:25:27,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349947034] [2023-02-15 23:25:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:27,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:27,230 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:25:27,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 23:25:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:27,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 23:25:27,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:25:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 23:25:27,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:25:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 23:25:27,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349947034] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:25:27,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:25:27,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-02-15 23:25:27,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058731221] [2023-02-15 23:25:27,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:25:27,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 23:25:27,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 23:25:27,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=155, Unknown=0, NotChecked=0, Total=272 [2023-02-15 23:25:27,370 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:27,545 INFO L93 Difference]: Finished difference Result 97 states and 136 transitions. [2023-02-15 23:25:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 23:25:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 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 [2023-02-15 23:25:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:27,546 INFO L225 Difference]: With dead ends: 97 [2023-02-15 23:25:27,546 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 23:25:27,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2023-02-15 23:25:27,548 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 177 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:27,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 69 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:25:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 23:25:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-02-15 23:25:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 79 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2023-02-15 23:25:27,555 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 24 [2023-02-15 23:25:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:27,555 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2023-02-15 23:25:27,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:27,556 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2023-02-15 23:25:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 23:25:27,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:27,557 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:27,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 23:25:27,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:27,762 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:27,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:27,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1935549725, now seen corresponding path program 2 times [2023-02-15 23:25:27,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:27,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544438436] [2023-02-15 23:25:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:27,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 23:25:28,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:28,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544438436] [2023-02-15 23:25:28,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544438436] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:25:28,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746466026] [2023-02-15 23:25:28,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:25:28,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:28,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:28,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:25:28,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 23:25:28,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:25:28,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:25:28,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 23:25:28,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:25:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 23:25:28,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:25:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 23:25:28,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746466026] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:25:28,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:25:28,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 23:25:28,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151237767] [2023-02-15 23:25:28,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:25:28,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 23:25:28,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:28,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 23:25:28,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-15 23:25:28,347 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:28,529 INFO L93 Difference]: Finished difference Result 329 states and 430 transitions. [2023-02-15 23:25:28,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 23:25:28,529 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 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 60 [2023-02-15 23:25:28,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:28,531 INFO L225 Difference]: With dead ends: 329 [2023-02-15 23:25:28,531 INFO L226 Difference]: Without dead ends: 272 [2023-02-15 23:25:28,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-15 23:25:28,532 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 473 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:28,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 284 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:25:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-15 23:25:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 104. [2023-02-15 23:25:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.2135922330097086) internal successors, (125), 103 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2023-02-15 23:25:28,543 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 60 [2023-02-15 23:25:28,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:28,544 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2023-02-15 23:25:28,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2023-02-15 23:25:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-15 23:25:28,545 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:28,545 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:28,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 23:25:28,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:28,750 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:28,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1156211659, now seen corresponding path program 3 times [2023-02-15 23:25:28,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:28,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665817992] [2023-02-15 23:25:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:28,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 23:25:29,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:29,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665817992] [2023-02-15 23:25:29,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665817992] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:25:29,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432055015] [2023-02-15 23:25:29,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:25:29,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:29,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:29,185 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:25:29,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 23:25:29,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 23:25:29,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:25:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 23:25:29,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:25:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2023-02-15 23:25:29,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 23:25:29,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432055015] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:25:29,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 23:25:29,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 29 [2023-02-15 23:25:29,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233627327] [2023-02-15 23:25:29,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:25:29,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 23:25:29,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:29,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 23:25:29,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-02-15 23:25:29,311 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2023-02-15 23:25:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:29,371 INFO L93 Difference]: Finished difference Result 193 states and 255 transitions. [2023-02-15 23:25:29,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 23:25:29,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 84 [2023-02-15 23:25:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:29,372 INFO L225 Difference]: With dead ends: 193 [2023-02-15 23:25:29,372 INFO L226 Difference]: Without dead ends: 184 [2023-02-15 23:25:29,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2023-02-15 23:25:29,373 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:29,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:25:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-02-15 23:25:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 105. [2023-02-15 23:25:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 104 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2023-02-15 23:25:29,383 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 84 [2023-02-15 23:25:29,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:29,383 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2023-02-15 23:25:29,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2023-02-15 23:25:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2023-02-15 23:25:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 23:25:29,385 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:29,385 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:29,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 23:25:29,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:29,590 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:29,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1290299501, now seen corresponding path program 4 times [2023-02-15 23:25:29,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:29,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95926922] [2023-02-15 23:25:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:29,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-02-15 23:25:30,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:30,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95926922] [2023-02-15 23:25:30,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95926922] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:25:30,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114695766] [2023-02-15 23:25:30,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 23:25:30,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:30,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:30,017 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:25:30,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 23:25:30,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 23:25:30,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:25:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 23:25:30,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:25:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-02-15 23:25:30,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:25:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-02-15 23:25:30,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114695766] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:25:30,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:25:30,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-02-15 23:25:30,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712183307] [2023-02-15 23:25:30,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:25:30,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 23:25:30,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:30,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 23:25:30,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 23:25:30,798 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:31,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:31,320 INFO L93 Difference]: Finished difference Result 825 states and 1072 transitions. [2023-02-15 23:25:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-15 23:25:31,320 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 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 87 [2023-02-15 23:25:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:31,324 INFO L225 Difference]: With dead ends: 825 [2023-02-15 23:25:31,324 INFO L226 Difference]: Without dead ends: 767 [2023-02-15 23:25:31,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 23:25:31,326 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2026 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2026 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:31,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2026 Valid, 586 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 23:25:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2023-02-15 23:25:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 153. [2023-02-15 23:25:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 152 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 175 transitions. [2023-02-15 23:25:31,352 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 175 transitions. Word has length 87 [2023-02-15 23:25:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:31,353 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 175 transitions. [2023-02-15 23:25:31,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 175 transitions. [2023-02-15 23:25:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-02-15 23:25:31,356 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:31,356 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:31,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 23:25:31,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:31,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:31,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:31,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1107291293, now seen corresponding path program 5 times [2023-02-15 23:25:31,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:31,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098297350] [2023-02-15 23:25:31,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:31,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-02-15 23:25:32,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:32,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098297350] [2023-02-15 23:25:32,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098297350] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:25:32,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517945891] [2023-02-15 23:25:32,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 23:25:32,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:32,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:32,949 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:25:33,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 23:26:24,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2023-02-15 23:26:24,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:26:24,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 23:26:24,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:26:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 120 proven. 15 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2023-02-15 23:26:24,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:26:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 127 proven. 8 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2023-02-15 23:26:25,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517945891] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:26:25,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:26:25,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 13, 13] total 71 [2023-02-15 23:26:25,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417930146] [2023-02-15 23:26:25,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:26:25,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-15 23:26:25,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:26:25,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-15 23:26:25,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1379, Invalid=3591, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 23:26:25,304 INFO L87 Difference]: Start difference. First operand 153 states and 175 transitions. Second operand has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:26:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:26:30,305 INFO L93 Difference]: Finished difference Result 568 states and 850 transitions. [2023-02-15 23:26:30,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2023-02-15 23:26:30,305 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 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 135 [2023-02-15 23:26:30,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:26:30,307 INFO L225 Difference]: With dead ends: 568 [2023-02-15 23:26:30,307 INFO L226 Difference]: Without dead ends: 510 [2023-02-15 23:26:30,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18900 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=17310, Invalid=45942, Unknown=0, NotChecked=0, Total=63252 [2023-02-15 23:26:30,324 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2873 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2873 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 23:26:30,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2873 Valid, 227 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [782 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 23:26:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-02-15 23:26:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 501. [2023-02-15 23:26:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.27) internal successors, (635), 500 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:26:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 635 transitions. [2023-02-15 23:26:30,418 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 635 transitions. Word has length 135 [2023-02-15 23:26:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:26:30,419 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 635 transitions. [2023-02-15 23:26:30,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:26:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 635 transitions. [2023-02-15 23:26:30,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-02-15 23:26:30,426 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:26:30,426 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 47, 47, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:26:30,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 23:26:30,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:26:30,641 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:26:30,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:26:30,641 INFO L85 PathProgramCache]: Analyzing trace with hash -151095726, now seen corresponding path program 6 times [2023-02-15 23:26:30,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:26:30,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794694625] [2023-02-15 23:26:30,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:26:30,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:26:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:26:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 19980 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 17771 trivial. 0 not checked. [2023-02-15 23:26:32,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:26:32,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794694625] [2023-02-15 23:26:32,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794694625] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:26:32,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888912361] [2023-02-15 23:26:32,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 23:26:32,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:26:32,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:26:33,005 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:26:33,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 23:26:33,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-02-15 23:26:33,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:26:33,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 23:26:33,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:26:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 19980 backedges. 7686 proven. 26 refuted. 0 times theorem prover too weak. 12268 trivial. 0 not checked. [2023-02-15 23:26:33,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:26:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 19980 backedges. 7690 proven. 22 refuted. 0 times theorem prover too weak. 12268 trivial. 0 not checked. [2023-02-15 23:26:33,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888912361] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:26:33,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:26:33,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 10, 10] total 62 [2023-02-15 23:26:33,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410114138] [2023-02-15 23:26:33,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:26:33,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-15 23:26:33,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:26:33,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-15 23:26:33,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1267, Invalid=2515, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 23:26:33,592 INFO L87 Difference]: Start difference. First operand 501 states and 635 transitions. Second operand has 62 states, 62 states have (on average 2.3548387096774195) internal successors, (146), 62 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:26:45,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:26:45,541 INFO L93 Difference]: Finished difference Result 1487 states and 2033 transitions. [2023-02-15 23:26:45,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 426 states. [2023-02-15 23:26:45,541 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.3548387096774195) internal successors, (146), 62 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 497 [2023-02-15 23:26:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:26:45,544 INFO L225 Difference]: With dead ends: 1487 [2023-02-15 23:26:45,544 INFO L226 Difference]: Without dead ends: 1083 [2023-02-15 23:26:45,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1664 GetRequests, 1225 SyntacticMatches, 4 SemanticMatches, 435 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76823 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=33975, Invalid=156557, Unknown=0, NotChecked=0, Total=190532 [2023-02-15 23:26:45,555 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6793 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6793 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 23:26:45,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6793 Valid, 350 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 23:26:45,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2023-02-15 23:26:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 685. [2023-02-15 23:26:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 1.2850877192982457) internal successors, (879), 684 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:26:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 879 transitions. [2023-02-15 23:26:45,682 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 879 transitions. Word has length 497 [2023-02-15 23:26:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:26:45,682 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 879 transitions. [2023-02-15 23:26:45,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.3548387096774195) internal successors, (146), 62 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:26:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 879 transitions. [2023-02-15 23:26:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2023-02-15 23:26:45,701 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:26:45,702 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 48, 48, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:26:45,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 23:26:45,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 23:26:45,906 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:26:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:26:45,907 INFO L85 PathProgramCache]: Analyzing trace with hash -159878554, now seen corresponding path program 7 times [2023-02-15 23:26:45,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:26:45,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335162523] [2023-02-15 23:26:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:26:45,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:26:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:26:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 33622 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-02-15 23:26:48,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:26:48,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335162523] [2023-02-15 23:26:48,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335162523] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:26:48,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669134809] [2023-02-15 23:26:48,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 23:26:48,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:26:48,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:26:48,285 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:26:48,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 23:26:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:26:48,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 2289 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 23:26:48,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:26:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 33622 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-02-15 23:26:48,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:26:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 33622 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-02-15 23:26:50,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669134809] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:26:50,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:26:50,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-02-15 23:26:50,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508289634] [2023-02-15 23:26:50,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:26:50,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-02-15 23:26:50,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:26:50,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-02-15 23:26:50,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 23:26:50,982 INFO L87 Difference]: Start difference. First operand 685 states and 879 transitions. Second operand has 101 states, 101 states have (on average 2.108910891089109) internal successors, (213), 101 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:26:53,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:26:53,750 INFO L93 Difference]: Finished difference Result 2442 states and 3185 transitions. [2023-02-15 23:26:53,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-02-15 23:26:53,751 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.108910891089109) internal successors, (213), 101 states have internal predecessors, (213), 0 states have call successors, (0), 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 613 [2023-02-15 23:26:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:26:53,755 INFO L225 Difference]: With dead ends: 2442 [2023-02-15 23:26:53,755 INFO L226 Difference]: Without dead ends: 1856 [2023-02-15 23:26:53,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1275 GetRequests, 1176 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 23:26:53,757 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 5115 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5115 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 23:26:53,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5115 Valid, 961 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 23:26:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2023-02-15 23:26:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 785. [2023-02-15 23:26:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 1.2487244897959184) internal successors, (979), 784 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:26:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 979 transitions. [2023-02-15 23:26:53,889 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 979 transitions. Word has length 613 [2023-02-15 23:26:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:26:53,889 INFO L495 AbstractCegarLoop]: Abstraction has 785 states and 979 transitions. [2023-02-15 23:26:53,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.108910891089109) internal successors, (213), 101 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:26:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 979 transitions. [2023-02-15 23:26:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2023-02-15 23:26:53,893 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:26:53,893 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 98, 98, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:26:53,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 23:26:54,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:26:54,098 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:26:54,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:26:54,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1526395650, now seen corresponding path program 8 times [2023-02-15 23:26:54,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:26:54,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478310002] [2023-02-15 23:26:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:26:54,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:26:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:27:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 40922 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-02-15 23:27:01,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:27:01,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478310002] [2023-02-15 23:27:01,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478310002] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:27:01,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005757101] [2023-02-15 23:27:01,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:27:01,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:27:01,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:27:01,142 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:27:01,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 23:27:01,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:27:01,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:27:01,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 100 conjunts are in the unsatisfiable core [2023-02-15 23:27:01,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:27:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 40922 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-02-15 23:27:01,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:27:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 40922 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-02-15 23:27:10,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005757101] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:27:10,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:27:10,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 201 [2023-02-15 23:27:10,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645300499] [2023-02-15 23:27:10,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:27:10,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2023-02-15 23:27:10,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:27:10,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2023-02-15 23:27:10,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20100, Invalid=20100, Unknown=0, NotChecked=0, Total=40200 [2023-02-15 23:27:10,486 INFO L87 Difference]: Start difference. First operand 785 states and 979 transitions. Second operand has 201 states, 201 states have (on average 2.054726368159204) internal successors, (413), 201 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:27:43,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:27:43,224 INFO L93 Difference]: Finished difference Result 4742 states and 6135 transitions. [2023-02-15 23:27:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2023-02-15 23:27:43,225 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 2.054726368159204) internal successors, (413), 201 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 713 [2023-02-15 23:27:43,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:27:43,259 INFO L225 Difference]: With dead ends: 4742 [2023-02-15 23:27:43,259 INFO L226 Difference]: Without dead ends: 4156 [2023-02-15 23:27:43,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1525 GetRequests, 1326 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=20100, Invalid=20100, Unknown=0, NotChecked=0, Total=40200 [2023-02-15 23:27:43,262 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 13962 mSDsluCounter, 2338 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 1105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13962 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 2265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1105 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 23:27:43,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13962 Valid, 2356 Invalid, 2265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1105 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 23:27:43,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2023-02-15 23:27:43,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 985. [2023-02-15 23:27:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 1.1981707317073171) internal successors, (1179), 984 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:27:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1179 transitions. [2023-02-15 23:27:43,411 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1179 transitions. Word has length 713 [2023-02-15 23:27:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:27:43,412 INFO L495 AbstractCegarLoop]: Abstraction has 985 states and 1179 transitions. [2023-02-15 23:27:43,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 2.054726368159204) internal successors, (413), 201 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:27:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1179 transitions. [2023-02-15 23:27:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 914 [2023-02-15 23:27:43,418 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:27:43,418 INFO L195 NwaCegarLoop]: trace histogram [198, 198, 123, 123, 123, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:27:43,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 23:27:43,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 23:27:43,626 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:27:43,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:27:43,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1081932346, now seen corresponding path program 9 times [2023-02-15 23:27:43,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:27:43,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511465632] [2023-02-15 23:27:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:27:43,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:27:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:28:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 70522 backedges. 0 proven. 39204 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-02-15 23:28:10,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:28:10,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511465632] [2023-02-15 23:28:10,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511465632] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:28:10,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192145815] [2023-02-15 23:28:10,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:28:10,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:28:10,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:28:10,014 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:28:10,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 23:28:10,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 23:28:10,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:28:10,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 23:28:10,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:28:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 70522 backedges. 1471 proven. 12 refuted. 0 times theorem prover too weak. 69039 trivial. 0 not checked. [2023-02-15 23:28:10,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:28:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 70522 backedges. 1471 proven. 12 refuted. 0 times theorem prover too weak. 69039 trivial. 0 not checked. [2023-02-15 23:28:11,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192145815] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:28:11,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:28:11,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [201, 9, 9] total 214 [2023-02-15 23:28:11,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679077878] [2023-02-15 23:28:11,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:28:11,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 214 states [2023-02-15 23:28:11,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:28:11,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2023-02-15 23:28:11,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21367, Invalid=24215, Unknown=0, NotChecked=0, Total=45582 [2023-02-15 23:28:11,290 INFO L87 Difference]: Start difference. First operand 985 states and 1179 transitions. Second operand has 214 states, 214 states have (on average 2.102803738317757) internal successors, (450), 214 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)