./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 a31fd051 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-?-a31fd05 [2023-02-15 09:04:40,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 09:04:40,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 09:04:40,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 09:04:40,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 09:04:40,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 09:04:40,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 09:04:40,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 09:04:40,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 09:04:40,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 09:04:40,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 09:04:40,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 09:04:40,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 09:04:40,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 09:04:40,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 09:04:40,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 09:04:40,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 09:04:40,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 09:04:40,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 09:04:40,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 09:04:40,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 09:04:40,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 09:04:40,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 09:04:40,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 09:04:40,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 09:04:40,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 09:04:40,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 09:04:40,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 09:04:40,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 09:04:40,718 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 09:04:40,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 09:04:40,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 09:04:40,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 09:04:40,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 09:04:40,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 09:04:40,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 09:04:40,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 09:04:40,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 09:04:40,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 09:04:40,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 09:04:40,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 09:04:40,737 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 09:04:40,764 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 09:04:40,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 09:04:40,765 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 09:04:40,765 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 09:04:40,766 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 09:04:40,766 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 09:04:40,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 09:04:40,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 09:04:40,767 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 09:04:40,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 09:04:40,768 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 09:04:40,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 09:04:40,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 09:04:40,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 09:04:40,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 09:04:40,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 09:04:40,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 09:04:40,769 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 09:04:40,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 09:04:40,769 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 09:04:40,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 09:04:40,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 09:04:40,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 09:04:40,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 09:04:40,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:04:40,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 09:04:40,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 09:04:40,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 09:04:40,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 09:04:40,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 09:04:40,772 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 09:04:40,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 09:04:40,772 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 09:04:40,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 09:04:40,772 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 09:04:40,773 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 [2023-02-15 09:04:41,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 09:04:41,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 09:04:41,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 09:04:41,032 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 09:04:41,032 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 09:04:41,033 INFO L432 ainManager$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 09:04:42,127 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 09:04:42,312 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 09:04:42,312 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2023-02-15 09:04:42,317 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5b8c75c4/86f6e59b1c2748c4a139d6d7d3359508/FLAG88f43fbf5 [2023-02-15 09:04:42,332 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5b8c75c4/86f6e59b1c2748c4a139d6d7d3359508 [2023-02-15 09:04:42,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 09:04:42,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 09:04:42,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 09:04:42,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 09:04:42,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 09:04:42,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ecccb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42, skipping insertion in model container [2023-02-15 09:04:42,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 09:04:42,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 09:04:42,524 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 09:04:42,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:04:42,574 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 09:04:42,596 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 09:04:42,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:04:42,629 INFO L208 MainTranslator]: Completed translation [2023-02-15 09:04:42,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42 WrapperNode [2023-02-15 09:04:42,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 09:04:42,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 09:04:42,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 09:04:42,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 09:04:42,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,663 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-02-15 09:04:42,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 09:04:42,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 09:04:42,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 09:04:42,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 09:04:42,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,708 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 09:04:42,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 09:04:42,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 09:04:42,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 09:04:42,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (1/1) ... [2023-02-15 09:04:42,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:04:42,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:42,762 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 09:04:42,784 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 09:04:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 09:04:42,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 09:04:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 09:04:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 09:04:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 09:04:42,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 09:04:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 09:04:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 09:04:42,921 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 09:04:42,923 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 09:04:43,120 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 09:04:43,129 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 09:04:43,136 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-15 09:04:43,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:04:43 BoogieIcfgContainer [2023-02-15 09:04:43,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 09:04:43,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 09:04:43,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 09:04:43,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 09:04:43,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:04:42" (1/3) ... [2023-02-15 09:04:43,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2452c553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:04:43, skipping insertion in model container [2023-02-15 09:04:43,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:42" (2/3) ... [2023-02-15 09:04:43,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2452c553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:04:43, skipping insertion in model container [2023-02-15 09:04:43,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:04:43" (3/3) ... [2023-02-15 09:04:43,151 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2023-02-15 09:04:43,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 09:04:43,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 09:04:43,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 09:04:43,226 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;@245f8325, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 09:04:43,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 09:04:43,230 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 09:04:43,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 09:04:43,236 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:43,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:43,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:43,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1932701392, now seen corresponding path program 1 times [2023-02-15 09:04:43,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:43,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210039062] [2023-02-15 09:04:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:43,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:43,414 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 09:04:43,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:43,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210039062] [2023-02-15 09:04:43,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210039062] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:04:43,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:04:43,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 09:04:43,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879320118] [2023-02-15 09:04:43,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:04:43,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 09:04:43,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:43,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 09:04:43,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:04:43,476 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 09:04:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:43,533 INFO L93 Difference]: Finished difference Result 44 states and 68 transitions. [2023-02-15 09:04:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 09:04:43,536 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 09:04:43,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:43,540 INFO L225 Difference]: With dead ends: 44 [2023-02-15 09:04:43,541 INFO L226 Difference]: Without dead ends: 21 [2023-02-15 09:04:43,543 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 09:04:43,545 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 09:04:43,546 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 09:04:43,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-15 09:04:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-02-15 09:04:43,565 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 09:04:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-02-15 09:04:43,567 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2023-02-15 09:04:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:43,567 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-02-15 09:04:43,567 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 09:04:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-02-15 09:04:43,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 09:04:43,568 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:43,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:43,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 09:04:43,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:43,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1277503826, now seen corresponding path program 1 times [2023-02-15 09:04:43,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:43,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031298618] [2023-02-15 09:04:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:43,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:43,628 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 09:04:43,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:43,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031298618] [2023-02-15 09:04:43,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031298618] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:43,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619145045] [2023-02-15 09:04:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:43,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:43,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:43,632 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 09:04:43,649 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 09:04:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:43,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 09:04:43,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:43,716 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 09:04:43,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:04:43,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619145045] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:04:43,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:04:43,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-02-15 09:04:43,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884805997] [2023-02-15 09:04:43,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:04:43,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 09:04:43,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:43,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 09:04:43,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:04:43,720 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 09:04:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:43,748 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-02-15 09:04:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 09:04:43,749 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 09:04:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:43,749 INFO L225 Difference]: With dead ends: 35 [2023-02-15 09:04:43,750 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 09:04:43,750 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 09:04:43,751 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 09:04:43,751 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 09:04:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 09:04:43,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2023-02-15 09:04:43,754 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 09:04:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-02-15 09:04:43,754 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2023-02-15 09:04:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:43,755 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-02-15 09:04:43,755 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 09:04:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-02-15 09:04:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 09:04:43,755 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:43,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:43,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 09:04:43,960 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 09:04:43,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:43,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:43,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1548598205, now seen corresponding path program 1 times [2023-02-15 09:04:43,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:43,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455661855] [2023-02-15 09:04:43,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:43,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:44,024 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 09:04:44,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:44,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455661855] [2023-02-15 09:04:44,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455661855] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:44,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840496171] [2023-02-15 09:04:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:44,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:44,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:44,026 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 09:04:44,028 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 09:04:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:44,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 09:04:44,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:44,076 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 09:04:44,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:44,099 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 09:04:44,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840496171] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:44,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:44,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 09:04:44,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829447646] [2023-02-15 09:04:44,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:44,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 09:04:44,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:44,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 09:04:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:04:44,102 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 09:04:44,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:44,136 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2023-02-15 09:04:44,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 09:04:44,136 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 09:04:44,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:44,137 INFO L225 Difference]: With dead ends: 71 [2023-02-15 09:04:44,137 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 09:04:44,138 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 09:04:44,138 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 09:04:44,139 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 09:04:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 09:04:44,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 27. [2023-02-15 09:04:44,142 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 09:04:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-02-15 09:04:44,143 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2023-02-15 09:04:44,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:44,143 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-02-15 09:04:44,143 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 09:04:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-02-15 09:04:44,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 09:04:44,144 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:44,144 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:44,151 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 09:04:44,349 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 09:04:44,349 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:44,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:44,350 INFO L85 PathProgramCache]: Analyzing trace with hash 515426679, now seen corresponding path program 2 times [2023-02-15 09:04:44,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:44,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368604401] [2023-02-15 09:04:44,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:44,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:44,448 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 09:04:44,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:44,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368604401] [2023-02-15 09:04:44,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368604401] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:04:44,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:04:44,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 09:04:44,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831849355] [2023-02-15 09:04:44,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:04:44,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 09:04:44,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:44,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 09:04:44,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 09:04:44,455 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 09:04:44,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:44,492 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2023-02-15 09:04:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 09:04:44,493 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 09:04:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:44,494 INFO L225 Difference]: With dead ends: 48 [2023-02-15 09:04:44,495 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 09:04:44,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:04:44,496 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:44,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 50 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:04:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 09:04:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2023-02-15 09:04:44,515 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 09:04:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-02-15 09:04:44,516 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 21 [2023-02-15 09:04:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:44,516 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-02-15 09:04:44,516 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 09:04:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-02-15 09:04:44,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 09:04:44,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:44,517 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 09:04:44,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 09:04:44,518 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:44,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1658369263, now seen corresponding path program 1 times [2023-02-15 09:04:44,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:44,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130710856] [2023-02-15 09:04:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:44,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:44,626 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 09:04:44,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:44,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130710856] [2023-02-15 09:04:44,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130710856] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:44,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501918432] [2023-02-15 09:04:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:44,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:44,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:44,635 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 09:04:44,637 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 09:04:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:44,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 09:04:44,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:44,754 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 09:04:44,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:44,833 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 09:04:44,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501918432] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:44,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:44,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-02-15 09:04:44,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133925812] [2023-02-15 09:04:44,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:44,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 09:04:44,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:44,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 09:04:44,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=155, Unknown=0, NotChecked=0, Total=272 [2023-02-15 09:04:44,838 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 09:04:45,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:45,041 INFO L93 Difference]: Finished difference Result 97 states and 136 transitions. [2023-02-15 09:04:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 09:04:45,042 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 09:04:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:45,044 INFO L225 Difference]: With dead ends: 97 [2023-02-15 09:04:45,044 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 09:04:45,045 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 09:04:45,046 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 240 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:45,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 76 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:04:45,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 09:04:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-02-15 09:04:45,062 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 09:04:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2023-02-15 09:04:45,064 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 24 [2023-02-15 09:04:45,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:45,064 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2023-02-15 09:04:45,064 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 09:04:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2023-02-15 09:04:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 09:04:45,065 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:45,066 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 09:04:45,072 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 09:04:45,270 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 09:04:45,270 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:45,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:45,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1935549725, now seen corresponding path program 2 times [2023-02-15 09:04:45,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:45,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844594308] [2023-02-15 09:04:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:45,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:45,572 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 09:04:45,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:45,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844594308] [2023-02-15 09:04:45,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844594308] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:45,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892671245] [2023-02-15 09:04:45,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:04:45,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:45,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:45,574 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 09:04:45,576 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 09:04:45,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:04:45,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:04:45,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 09:04:45,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:45,694 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 09:04:45,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:45,855 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 09:04:45,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892671245] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:45,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:45,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 09:04:45,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772614975] [2023-02-15 09:04:45,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:45,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 09:04:45,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:45,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 09:04:45,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-15 09:04:45,858 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 09:04:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:46,019 INFO L93 Difference]: Finished difference Result 329 states and 430 transitions. [2023-02-15 09:04:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 09:04:46,019 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 09:04:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:46,020 INFO L225 Difference]: With dead ends: 329 [2023-02-15 09:04:46,021 INFO L226 Difference]: Without dead ends: 272 [2023-02-15 09:04:46,021 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 09:04:46,022 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 567 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:46,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 256 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:04:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-15 09:04:46,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 104. [2023-02-15 09:04:46,029 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 09:04:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2023-02-15 09:04:46,030 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 60 [2023-02-15 09:04:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:46,030 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2023-02-15 09:04:46,031 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 09:04:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2023-02-15 09:04:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-15 09:04:46,032 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:46,032 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 09:04:46,037 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 09:04:46,236 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 09:04:46,237 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:46,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:46,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1156211659, now seen corresponding path program 3 times [2023-02-15 09:04:46,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:46,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773732072] [2023-02-15 09:04:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:46,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:46,634 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 09:04:46,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:46,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773732072] [2023-02-15 09:04:46,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773732072] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:46,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104365510] [2023-02-15 09:04:46,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:04:46,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:46,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:46,635 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 09:04:46,637 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 09:04:46,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 09:04:46,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:04:46,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 09:04:46,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:46,784 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 09:04:46,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:04:46,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104365510] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:04:46,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:04:46,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 29 [2023-02-15 09:04:46,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889671822] [2023-02-15 09:04:46,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:04:46,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 09:04:46,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:46,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 09:04:46,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-02-15 09:04:46,786 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 09:04:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:46,861 INFO L93 Difference]: Finished difference Result 193 states and 255 transitions. [2023-02-15 09:04:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 09:04:46,861 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 09:04:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:46,862 INFO L225 Difference]: With dead ends: 193 [2023-02-15 09:04:46,862 INFO L226 Difference]: Without dead ends: 184 [2023-02-15 09:04:46,863 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 09:04:46,864 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:46,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 68 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:04:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-02-15 09:04:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 105. [2023-02-15 09:04:46,871 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 09:04:46,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2023-02-15 09:04:46,872 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 84 [2023-02-15 09:04:46,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:46,872 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2023-02-15 09:04:46,872 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 09:04:46,872 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2023-02-15 09:04:46,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 09:04:46,873 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:46,873 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 09:04:46,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 09:04:47,078 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 09:04:47,078 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:47,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1290299501, now seen corresponding path program 4 times [2023-02-15 09:04:47,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:47,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114186917] [2023-02-15 09:04:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:47,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:47,509 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 09:04:47,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:47,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114186917] [2023-02-15 09:04:47,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114186917] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:47,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141813012] [2023-02-15 09:04:47,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:04:47,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:47,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:47,519 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 09:04:47,522 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 09:04:47,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:04:47,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:04:47,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 09:04:47,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:47,671 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 09:04:47,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:48,253 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 09:04:48,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141813012] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:48,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:48,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-02-15 09:04:48,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079519976] [2023-02-15 09:04:48,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:48,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 09:04:48,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 09:04:48,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 09:04:48,255 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 09:04:48,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:48,847 INFO L93 Difference]: Finished difference Result 825 states and 1072 transitions. [2023-02-15 09:04:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-15 09:04:48,848 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 09:04:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:48,851 INFO L225 Difference]: With dead ends: 825 [2023-02-15 09:04:48,851 INFO L226 Difference]: Without dead ends: 767 [2023-02-15 09:04:48,852 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 09:04:48,853 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2258 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2258 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:48,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2258 Valid, 581 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 09:04:48,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2023-02-15 09:04:48,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 153. [2023-02-15 09:04:48,872 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 09:04:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 175 transitions. [2023-02-15 09:04:48,874 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 175 transitions. Word has length 87 [2023-02-15 09:04:48,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:48,875 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 175 transitions. [2023-02-15 09:04:48,875 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 09:04:48,875 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 175 transitions. [2023-02-15 09:04:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-02-15 09:04:48,883 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:48,883 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 09:04:48,899 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 09:04:49,093 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 09:04:49,093 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:49,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:49,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1107291293, now seen corresponding path program 5 times [2023-02-15 09:04:49,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:49,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907284622] [2023-02-15 09:04:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:49,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:50,492 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 09:04:50,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:50,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907284622] [2023-02-15 09:04:50,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907284622] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:50,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585235420] [2023-02-15 09:04:50,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:04:50,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:50,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:50,501 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 09:04:50,538 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 09:05:01,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2023-02-15 09:05:01,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:05:01,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:05:01,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:05:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 2161 trivial. 0 not checked. [2023-02-15 09:05:01,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:05:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 89 proven. 4 refuted. 0 times theorem prover too weak. 2161 trivial. 0 not checked. [2023-02-15 09:05:01,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585235420] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:05:01,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:05:01,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 8, 8] total 60 [2023-02-15 09:05:01,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134745748] [2023-02-15 09:05:01,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:05:01,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-15 09:05:01,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:05:01,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-15 09:05:01,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=2308, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 09:05:01,608 INFO L87 Difference]: Start difference. First operand 153 states and 175 transitions. Second operand has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 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 09:05:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:05:06,959 INFO L93 Difference]: Finished difference Result 913 states and 1240 transitions. [2023-02-15 09:05:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2023-02-15 09:05:06,960 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 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 09:05:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:05:06,967 INFO L225 Difference]: With dead ends: 913 [2023-02-15 09:05:06,967 INFO L226 Difference]: Without dead ends: 855 [2023-02-15 09:05:07,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19097 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=17074, Invalid=42218, Unknown=0, NotChecked=0, Total=59292 [2023-02-15 09:05:07,004 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5281 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5281 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 09:05:07,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5281 Valid, 589 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 09:05:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2023-02-15 09:05:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 180. [2023-02-15 09:05:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 179 states have internal predecessors, (207), 0 states have call successors, (0), 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 09:05:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2023-02-15 09:05:07,017 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 135 [2023-02-15 09:05:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:05:07,017 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2023-02-15 09:05:07,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 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 09:05:07,017 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2023-02-15 09:05:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-02-15 09:05:07,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:05:07,022 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 15, 15, 15, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:05:07,037 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 09:05:07,233 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 09:05:07,234 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:05:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:05:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1557114873, now seen corresponding path program 6 times [2023-02-15 09:05:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:05:07,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190802131] [2023-02-15 09:05:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:05:07,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:05:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:05:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2023-02-15 09:05:08,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:05:08,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190802131] [2023-02-15 09:05:08,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190802131] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:05:08,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808187944] [2023-02-15 09:05:08,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 09:05:08,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:05:08,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:05:08,565 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 09:05:08,568 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 09:05:08,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-02-15 09:05:08,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:05:08,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 09:05:08,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:05:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 132 proven. 5 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2023-02-15 09:05:08,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:05:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 132 proven. 5 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2023-02-15 09:05:09,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808187944] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:05:09,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:05:09,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 8, 8] total 61 [2023-02-15 09:05:09,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063763702] [2023-02-15 09:05:09,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:05:09,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-15 09:05:09,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:05:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-15 09:05:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1519, Invalid=2141, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 09:05:09,133 INFO L87 Difference]: Start difference. First operand 180 states and 207 transitions. Second operand has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:05:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:05:17,725 INFO L93 Difference]: Finished difference Result 1364 states and 1911 transitions. [2023-02-15 09:05:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 349 states. [2023-02-15 09:05:17,725 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2023-02-15 09:05:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:05:17,730 INFO L225 Difference]: With dead ends: 1364 [2023-02-15 09:05:17,730 INFO L226 Difference]: Without dead ends: 1232 [2023-02-15 09:05:17,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47559 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=27227, Invalid=96325, Unknown=0, NotChecked=0, Total=123552 [2023-02-15 09:05:17,738 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4478 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4478 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 09:05:17,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4478 Valid, 202 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 09:05:17,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2023-02-15 09:05:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 706. [2023-02-15 09:05:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 1.3574468085106384) internal successors, (957), 705 states have internal predecessors, (957), 0 states have call successors, (0), 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 09:05:17,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 957 transitions. [2023-02-15 09:05:17,919 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 957 transitions. Word has length 176 [2023-02-15 09:05:17,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:05:17,920 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 957 transitions. [2023-02-15 09:05:17,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:05:17,920 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 957 transitions. [2023-02-15 09:05:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2023-02-15 09:05:17,928 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:05:17,928 INFO L195 NwaCegarLoop]: trace histogram [143, 143, 143, 50, 50, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:05:17,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 09:05:18,133 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 09:05:18,133 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:05:18,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:05:18,134 INFO L85 PathProgramCache]: Analyzing trace with hash -658164028, now seen corresponding path program 7 times [2023-02-15 09:05:18,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:05:18,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164687381] [2023-02-15 09:05:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:05:18,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:05:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:05:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2023-02-15 09:05:21,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:05:21,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164687381] [2023-02-15 09:05:21,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164687381] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:05:21,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988870773] [2023-02-15 09:05:21,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 09:05:21,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:05:21,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:05:21,131 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 09:05:21,132 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 09:05:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:05:21,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 09:05:21,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:05:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2023-02-15 09:05:21,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:05:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 43255 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2023-02-15 09:05:24,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988870773] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:05:24,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:05:24,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2023-02-15 09:05:24,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110013683] [2023-02-15 09:05:24,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:05:24,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-02-15 09:05:24,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:05:24,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-02-15 09:05:24,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-02-15 09:05:24,241 INFO L87 Difference]: Start difference. First operand 706 states and 957 transitions. Second operand has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 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 09:05:38,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:05:38,450 INFO L93 Difference]: Finished difference Result 44922 states and 63580 transitions. [2023-02-15 09:05:38,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-02-15 09:05:38,451 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 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 683 [2023-02-15 09:05:38,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:05:38,572 INFO L225 Difference]: With dead ends: 44922 [2023-02-15 09:05:38,572 INFO L226 Difference]: Without dead ends: 44319 [2023-02-15 09:05:38,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1417 GetRequests, 1314 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-02-15 09:05:38,586 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 4854 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4854 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 09:05:38,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4854 Valid, 998 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 09:05:38,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44319 states. [2023-02-15 09:05:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44319 to 810. [2023-02-15 09:05:39,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 1.311495673671199) internal successors, (1061), 809 states have internal predecessors, (1061), 0 states have call successors, (0), 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 09:05:39,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1061 transitions. [2023-02-15 09:05:39,054 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1061 transitions. Word has length 683 [2023-02-15 09:05:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:05:39,054 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1061 transitions. [2023-02-15 09:05:39,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 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 09:05:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1061 transitions. [2023-02-15 09:05:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2023-02-15 09:05:39,066 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:05:39,066 INFO L195 NwaCegarLoop]: trace histogram [143, 143, 143, 102, 102, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:05:39,091 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 09:05:39,291 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 09:05:39,291 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:05:39,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:05:39,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1077196708, now seen corresponding path program 8 times [2023-02-15 09:05:39,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:05:39,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554279739] [2023-02-15 09:05:39,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:05:39,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:05:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:05:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2023-02-15 09:05:46,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:05:46,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554279739] [2023-02-15 09:05:46,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554279739] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:05:46,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350253727] [2023-02-15 09:05:46,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:05:46,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:05:46,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:05:46,941 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 09:05:46,945 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 09:05:47,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:05:47,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:05:47,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 3029 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-15 09:05:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:05:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2023-02-15 09:05:47,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:05:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 51159 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2023-02-15 09:05:56,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350253727] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:05:56,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:05:56,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105] total 209 [2023-02-15 09:05:56,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520412392] [2023-02-15 09:05:56,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:05:56,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 209 states [2023-02-15 09:05:56,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:05:56,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2023-02-15 09:05:56,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2023-02-15 09:05:56,496 INFO L87 Difference]: Start difference. First operand 810 states and 1061 transitions. Second operand has 209 states, 209 states have (on average 2.0526315789473686) internal successors, (429), 209 states have internal predecessors, (429), 0 states have call successors, (0), 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 09:07:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:07:23,625 INFO L93 Difference]: Finished difference Result 105970 states and 150056 transitions. [2023-02-15 09:07:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2023-02-15 09:07:23,626 INFO L78 Accepts]: Start accepts. Automaton has has 209 states, 209 states have (on average 2.0526315789473686) internal successors, (429), 209 states have internal predecessors, (429), 0 states have call successors, (0), 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 787 [2023-02-15 09:07:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:07:23,852 INFO L225 Difference]: With dead ends: 105970 [2023-02-15 09:07:23,853 INFO L226 Difference]: Without dead ends: 105367 [2023-02-15 09:07:23,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1470 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=21736, Invalid=21736, Unknown=0, NotChecked=0, Total=43472 [2023-02-15 09:07:23,900 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 12836 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12836 SdHoareTripleChecker+Valid, 2456 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-15 09:07:23,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12836 Valid, 2456 Invalid, 2147 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [943 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-15 09:07:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105367 states. [2023-02-15 09:07:25,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105367 to 1018. [2023-02-15 09:07:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.247787610619469) internal successors, (1269), 1017 states have internal predecessors, (1269), 0 states have call successors, (0), 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 09:07:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1269 transitions. [2023-02-15 09:07:25,172 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1269 transitions. Word has length 787 [2023-02-15 09:07:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:07:25,173 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 1269 transitions. [2023-02-15 09:07:25,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 209 states, 209 states have (on average 2.0526315789473686) internal successors, (429), 209 states have internal predecessors, (429), 0 states have call successors, (0), 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 09:07:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1269 transitions. [2023-02-15 09:07:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2023-02-15 09:07:25,179 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:07:25,180 INFO L195 NwaCegarLoop]: trace histogram [206, 206, 143, 143, 143, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:07:25,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-15 09:07:25,384 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 09:07:25,385 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:07:25,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:07:25,385 INFO L85 PathProgramCache]: Analyzing trace with hash 994231180, now seen corresponding path program 9 times [2023-02-15 09:07:25,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:07:25,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262555615] [2023-02-15 09:07:25,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:07:25,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:07:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:07:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 83191 backedges. 0 proven. 42436 refuted. 0 times theorem prover too weak. 40755 trivial. 0 not checked. [2023-02-15 09:07:53,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:07:53,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262555615] [2023-02-15 09:07:53,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262555615] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:07:53,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230486588] [2023-02-15 09:07:53,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:07:53,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:07:53,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:07:53,132 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 09:07:53,134 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 09:07:53,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-15 09:07:53,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:07:53,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 09:07:53,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:07:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 83191 backedges. 3027 proven. 51 refuted. 0 times theorem prover too weak. 80113 trivial. 0 not checked. [2023-02-15 09:07:54,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:07:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 83191 backedges. 3027 proven. 51 refuted. 0 times theorem prover too weak. 80113 trivial. 0 not checked. [2023-02-15 09:07:55,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230486588] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:07:55,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:07:55,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [209, 12, 12] total 228 [2023-02-15 09:07:55,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254317090] [2023-02-15 09:07:55,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:07:55,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2023-02-15 09:07:55,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:07:55,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2023-02-15 09:07:55,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23753, Invalid=28003, Unknown=0, NotChecked=0, Total=51756 [2023-02-15 09:07:55,291 INFO L87 Difference]: Start difference. First operand 1018 states and 1269 transitions. Second operand has 228 states, 228 states have (on average 2.1228070175438596) internal successors, (484), 228 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)