./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_vararg_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 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_vararg_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 28ac72543f751666908cbd68a77fa11ffe4dd886016c3996df45b97bb42d5078 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 21:27:43,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 21:27:43,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 21:27:43,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 21:27:43,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 21:27:43,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 21:27:43,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 21:27:43,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 21:27:43,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 21:27:43,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 21:27:43,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 21:27:43,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 21:27:43,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 21:27:43,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 21:27:43,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 21:27:43,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 21:27:43,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 21:27:43,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 21:27:43,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 21:27:43,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 21:27:43,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 21:27:43,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 21:27:43,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 21:27:43,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 21:27:43,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 21:27:43,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 21:27:43,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 21:27:43,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 21:27:43,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 21:27:43,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 21:27:43,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 21:27:43,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 21:27:43,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 21:27:43,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 21:27:43,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 21:27:43,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 21:27:43,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 21:27:43,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 21:27:43,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 21:27:43,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 21:27:43,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 21:27:43,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 21:27:43,625 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 21:27:43,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 21:27:43,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 21:27:43,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 21:27:43,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 21:27:43,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 21:27:43,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 21:27:43,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 21:27:43,630 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 21:27:43,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 21:27:43,631 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 21:27:43,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 21:27:43,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 21:27:43,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 21:27:43,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 21:27:43,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 21:27:43,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 21:27:43,632 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 21:27:43,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 21:27:43,633 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 21:27:43,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 21:27:43,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 21:27:43,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 21:27:43,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 21:27:43,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:27:43,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 21:27:43,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 21:27:43,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 21:27:43,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 21:27:43,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 21:27:43,635 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 21:27:43,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 21:27:43,635 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 21:27:43,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 21:27:43,635 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 21:27:43,636 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28ac72543f751666908cbd68a77fa11ffe4dd886016c3996df45b97bb42d5078 [2023-02-14 21:27:43,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 21:27:43,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 21:27:43,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 21:27:43,918 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 21:27:43,918 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 21:27:43,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_vararg_ground.i [2023-02-14 21:27:44,980 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 21:27:45,187 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 21:27:45,187 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_vararg_ground.i [2023-02-14 21:27:45,192 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8b904a5c/bafb93e32b9649ce8d793f34f1d2ae1f/FLAG4bdd812b6 [2023-02-14 21:27:45,603 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8b904a5c/bafb93e32b9649ce8d793f34f1d2ae1f [2023-02-14 21:27:45,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 21:27:45,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 21:27:45,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 21:27:45,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 21:27:45,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 21:27:45,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:27:45" (1/1) ... [2023-02-14 21:27:45,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@791ef9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45, skipping insertion in model container [2023-02-14 21:27:45,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:27:45" (1/1) ... [2023-02-14 21:27:45,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 21:27:45,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 21:27:45,737 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_vararg_ground.i[815,828] [2023-02-14 21:27:45,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:27:45,753 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 21:27:45,763 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_vararg_ground.i[815,828] [2023-02-14 21:27:45,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:27:45,776 INFO L208 MainTranslator]: Completed translation [2023-02-14 21:27:45,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45 WrapperNode [2023-02-14 21:27:45,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 21:27:45,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 21:27:45,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 21:27:45,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 21:27:45,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45" (1/1) ... [2023-02-14 21:27:45,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45" (1/1) ... [2023-02-14 21:27:45,804 INFO L138 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2023-02-14 21:27:45,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 21:27:45,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 21:27:45,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 21:27:45,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 21:27:45,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45" (1/1) ... [2023-02-14 21:27:45,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45" (1/1) ... [2023-02-14 21:27:45,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45" (1/1) ... [2023-02-14 21:27:45,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45" (1/1) ... [2023-02-14 21:27:45,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45" (1/1) ... [2023-02-14 21:27:45,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45" (1/1) ... [2023-02-14 21:27:45,840 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45" (1/1) ... [2023-02-14 21:27:45,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45" (1/1) ... [2023-02-14 21:27:45,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 21:27:45,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 21:27:45,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 21:27:45,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 21:27:45,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45" (1/1) ... [2023-02-14 21:27:45,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:27:45,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:45,882 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) [2023-02-14 21:27:45,903 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 [2023-02-14 21:27:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 21:27:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 21:27:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 21:27:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 21:27:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 21:27:45,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 21:27:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 21:27:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 21:27:45,982 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 21:27:45,986 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 21:27:46,085 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 21:27:46,090 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 21:27:46,090 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 21:27:46,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:27:46 BoogieIcfgContainer [2023-02-14 21:27:46,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 21:27:46,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 21:27:46,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 21:27:46,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 21:27:46,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:27:45" (1/3) ... [2023-02-14 21:27:46,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f07e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:27:46, skipping insertion in model container [2023-02-14 21:27:46,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:45" (2/3) ... [2023-02-14 21:27:46,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f07e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:27:46, skipping insertion in model container [2023-02-14 21:27:46,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:27:46" (3/3) ... [2023-02-14 21:27:46,101 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_vararg_ground.i [2023-02-14 21:27:46,117 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 21:27:46,117 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 21:27:46,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 21:27:46,164 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;@f6775a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 21:27:46,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 21:27:46,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:46,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 21:27:46,176 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:46,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:46,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:46,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:46,182 INFO L85 PathProgramCache]: Analyzing trace with hash 221467647, now seen corresponding path program 1 times [2023-02-14 21:27:46,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:46,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069867564] [2023-02-14 21:27:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:46,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:27:46,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:46,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069867564] [2023-02-14 21:27:46,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069867564] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:27:46,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:27:46,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 21:27:46,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246481358] [2023-02-14 21:27:46,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:27:46,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 21:27:46,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:46,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 21:27:46,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 21:27:46,403 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:46,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:46,449 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2023-02-14 21:27:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 21:27:46,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-02-14 21:27:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:46,472 INFO L225 Difference]: With dead ends: 32 [2023-02-14 21:27:46,472 INFO L226 Difference]: Without dead ends: 15 [2023-02-14 21:27:46,474 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 [2023-02-14 21:27:46,477 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:46,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:27:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-14 21:27:46,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-02-14 21:27:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-02-14 21:27:46,523 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2023-02-14 21:27:46,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:46,525 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-02-14 21:27:46,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:46,525 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-02-14 21:27:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 21:27:46,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:46,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:46,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 21:27:46,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1650471280, now seen corresponding path program 1 times [2023-02-14 21:27:46,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:46,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977214834] [2023-02-14 21:27:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:46,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:27:46,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:46,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977214834] [2023-02-14 21:27:46,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977214834] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:27:46,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686155912] [2023-02-14 21:27:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:46,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:27:46,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:46,683 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) [2023-02-14 21:27:46,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 21:27:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:46,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 21:27:46,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:27:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:27:46,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:27:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:27:46,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686155912] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:27:46,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:27:46,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-14 21:27:46,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925867106] [2023-02-14 21:27:46,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:27:46,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 21:27:46,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:46,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 21:27:46,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 21:27:46,858 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:46,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:46,900 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2023-02-14 21:27:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 21:27:46,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 11 [2023-02-14 21:27:46,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:46,904 INFO L225 Difference]: With dead ends: 29 [2023-02-14 21:27:46,904 INFO L226 Difference]: Without dead ends: 20 [2023-02-14 21:27:46,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 21:27:46,906 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:46,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 46 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:27:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-14 21:27:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-14 21:27:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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) [2023-02-14 21:27:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-02-14 21:27:46,915 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2023-02-14 21:27:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:46,915 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-02-14 21:27:46,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-02-14 21:27:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-14 21:27:46,916 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:46,916 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:46,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 21:27:47,122 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 [2023-02-14 21:27:47,123 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:47,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:47,123 INFO L85 PathProgramCache]: Analyzing trace with hash 77278250, now seen corresponding path program 2 times [2023-02-14 21:27:47,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:47,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680324001] [2023-02-14 21:27:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:47,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 21:27:47,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:47,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680324001] [2023-02-14 21:27:47,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680324001] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:27:47,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:27:47,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 21:27:47,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796494674] [2023-02-14 21:27:47,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:27:47,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 21:27:47,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:47,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 21:27:47,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 21:27:47,312 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:47,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:47,324 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-02-14 21:27:47,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 21:27:47,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 17 [2023-02-14 21:27:47,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:47,325 INFO L225 Difference]: With dead ends: 30 [2023-02-14 21:27:47,325 INFO L226 Difference]: Without dead ends: 22 [2023-02-14 21:27:47,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 21:27:47,327 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:47,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:27:47,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-14 21:27:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-14 21:27:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:47,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-02-14 21:27:47,346 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2023-02-14 21:27:47,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:47,346 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-02-14 21:27:47,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:47,347 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-02-14 21:27:47,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 21:27:47,347 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:47,347 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:47,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 21:27:47,348 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:47,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1540928625, now seen corresponding path program 1 times [2023-02-14 21:27:47,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:47,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199109550] [2023-02-14 21:27:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:47,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:27:47,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:47,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199109550] [2023-02-14 21:27:47,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199109550] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:27:47,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964177759] [2023-02-14 21:27:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:47,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:27:47,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:47,525 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) [2023-02-14 21:27:47,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 21:27:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 21:27:47,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:27:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:27:47,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:27:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:27:47,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964177759] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:27:47,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:27:47,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-14 21:27:47,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421384467] [2023-02-14 21:27:47,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:27:47,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 21:27:47,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:47,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 21:27:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-14 21:27:47,762 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:47,825 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2023-02-14 21:27:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 21:27:47,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-14 21:27:47,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:47,832 INFO L225 Difference]: With dead ends: 45 [2023-02-14 21:27:47,832 INFO L226 Difference]: Without dead ends: 34 [2023-02-14 21:27:47,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-14 21:27:47,833 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:47,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:27:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-14 21:27:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-02-14 21:27:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-02-14 21:27:47,840 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 19 [2023-02-14 21:27:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:47,840 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-02-14 21:27:47,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-02-14 21:27:47,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 21:27:47,841 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:47,842 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:47,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 21:27:48,042 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,SelfDestructingSolverStorable3 [2023-02-14 21:27:48,043 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1100375677, now seen corresponding path program 2 times [2023-02-14 21:27:48,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:48,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023029476] [2023-02-14 21:27:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:48,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:27:48,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:48,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023029476] [2023-02-14 21:27:48,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023029476] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:27:48,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965935368] [2023-02-14 21:27:48,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 21:27:48,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:27:48,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:48,298 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) [2023-02-14 21:27:48,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 21:27:48,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 21:27:48,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:27:48,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 21:27:48,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:27:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:27:48,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:27:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:27:48,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965935368] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:27:48,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:27:48,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-14 21:27:48,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993095849] [2023-02-14 21:27:48,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:27:48,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 21:27:48,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:48,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 21:27:48,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-14 21:27:48,688 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:48,758 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2023-02-14 21:27:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 21:27:48,759 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-14 21:27:48,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:48,760 INFO L225 Difference]: With dead ends: 69 [2023-02-14 21:27:48,760 INFO L226 Difference]: Without dead ends: 58 [2023-02-14 21:27:48,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-14 21:27:48,761 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:48,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:27:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-14 21:27:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-02-14 21:27:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2023-02-14 21:27:48,770 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2023-02-14 21:27:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:48,770 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2023-02-14 21:27:48,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2023-02-14 21:27:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 21:27:48,772 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:48,772 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:48,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 21:27:48,978 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 [2023-02-14 21:27:48,979 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:48,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:48,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1124643989, now seen corresponding path program 3 times [2023-02-14 21:27:48,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:48,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537518747] [2023-02-14 21:27:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:48,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:27:49,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:49,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537518747] [2023-02-14 21:27:49,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537518747] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:27:49,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997514920] [2023-02-14 21:27:49,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 21:27:49,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:27:49,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:49,529 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) [2023-02-14 21:27:49,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 21:27:49,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 21:27:49,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:27:49,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 21:27:49,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:27:49,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 21:27:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-02-14 21:27:49,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:27:49,959 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-02-14 21:27:49,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2023-02-14 21:27:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-02-14 21:27:50,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997514920] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:27:50,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:27:50,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-02-14 21:27:50,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991261668] [2023-02-14 21:27:50,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:27:50,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-14 21:27:50,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:50,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-14 21:27:50,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 21:27:50,055 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:50,675 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2023-02-14 21:27:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-14 21:27:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 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 55 [2023-02-14 21:27:50,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:50,676 INFO L225 Difference]: With dead ends: 77 [2023-02-14 21:27:50,676 INFO L226 Difference]: Without dead ends: 66 [2023-02-14 21:27:50,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=982, Invalid=2800, Unknown=0, NotChecked=0, Total=3782 [2023-02-14 21:27:50,678 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:50,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 85 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:27:50,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-14 21:27:50,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2023-02-14 21:27:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2023-02-14 21:27:50,686 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 55 [2023-02-14 21:27:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:50,686 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2023-02-14 21:27:50,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2023-02-14 21:27:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-14 21:27:50,688 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:50,688 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:50,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 21:27:50,895 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 [2023-02-14 21:27:50,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:50,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1539427871, now seen corresponding path program 1 times [2023-02-14 21:27:50,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:50,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745954482] [2023-02-14 21:27:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:50,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 21:27:51,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:51,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745954482] [2023-02-14 21:27:51,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745954482] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:27:51,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461097390] [2023-02-14 21:27:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:51,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:27:51,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:51,464 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) [2023-02-14 21:27:51,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 21:27:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:51,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-14 21:27:51,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:27:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 21:27:51,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:27:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 21:27:52,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461097390] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:27:52,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:27:52,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-02-14 21:27:52,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686646951] [2023-02-14 21:27:52,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:27:52,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-14 21:27:52,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:52,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-14 21:27:52,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 21:27:52,439 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:52,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:52,551 INFO L93 Difference]: Finished difference Result 125 states and 153 transitions. [2023-02-14 21:27:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-14 21:27:52,551 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 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 61 [2023-02-14 21:27:52,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:52,552 INFO L225 Difference]: With dead ends: 125 [2023-02-14 21:27:52,552 INFO L226 Difference]: Without dead ends: 112 [2023-02-14 21:27:52,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 21:27:52,554 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:52,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:27:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-14 21:27:52,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-02-14 21:27:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2023-02-14 21:27:52,570 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 61 [2023-02-14 21:27:52,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:52,572 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2023-02-14 21:27:52,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2023-02-14 21:27:52,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-14 21:27:52,578 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:52,579 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:52,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 21:27:52,787 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 [2023-02-14 21:27:52,787 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:52,788 INFO L85 PathProgramCache]: Analyzing trace with hash 236610605, now seen corresponding path program 2 times [2023-02-14 21:27:52,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:52,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069729640] [2023-02-14 21:27:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:52,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 21:27:54,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069729640] [2023-02-14 21:27:54,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069729640] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:27:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803433015] [2023-02-14 21:27:54,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 21:27:54,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:27:54,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:54,853 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) [2023-02-14 21:27:54,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 21:27:54,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 21:27:54,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:27:54,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-14 21:27:54,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:27:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 21:27:55,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:27:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 21:27:57,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803433015] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:27:57,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:27:57,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-02-14 21:27:57,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384764890] [2023-02-14 21:27:57,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:27:57,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-02-14 21:27:57,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:57,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-02-14 21:27:57,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-14 21:27:57,856 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 101 states, 101 states have (on average 2.0792079207920793) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:58,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:58,124 INFO L93 Difference]: Finished difference Result 225 states and 278 transitions. [2023-02-14 21:27:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-02-14 21:27:58,124 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0792079207920793) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 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 111 [2023-02-14 21:27:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:58,126 INFO L225 Difference]: With dead ends: 225 [2023-02-14 21:27:58,126 INFO L226 Difference]: Without dead ends: 212 [2023-02-14 21:27:58,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-14 21:27:58,129 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:58,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 90 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 21:27:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-02-14 21:27:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2023-02-14 21:27:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.014218009478673) internal successors, (214), 211 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:58,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2023-02-14 21:27:58,145 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 111 [2023-02-14 21:27:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:58,146 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2023-02-14 21:27:58,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0792079207920793) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2023-02-14 21:27:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-02-14 21:27:58,148 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:58,148 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:58,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-14 21:27:58,354 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 [2023-02-14 21:27:58,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:58,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:58,355 INFO L85 PathProgramCache]: Analyzing trace with hash -760163895, now seen corresponding path program 3 times [2023-02-14 21:27:58,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:58,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575388982] [2023-02-14 21:27:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:58,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:28:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9608 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 21:28:03,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:28:03,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575388982] [2023-02-14 21:28:03,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575388982] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:28:03,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070049163] [2023-02-14 21:28:03,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 21:28:03,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:28:03,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:28:03,948 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) [2023-02-14 21:28:03,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 21:28:04,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 21:28:04,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:28:04,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 21:28:04,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:28:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9608 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-02-14 21:28:04,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:28:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9608 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-02-14 21:28:04,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070049163] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:28:04,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:28:04,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 6, 6] total 107 [2023-02-14 21:28:04,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296028771] [2023-02-14 21:28:04,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:28:04,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-02-14 21:28:04,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:28:04,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-02-14 21:28:04,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6272, Unknown=0, NotChecked=0, Total=11342 [2023-02-14 21:28:04,826 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand has 107 states, 107 states have (on average 2.1401869158878504) internal successors, (229), 107 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:28:08,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:28:08,774 INFO L93 Difference]: Finished difference Result 236 states and 241 transitions. [2023-02-14 21:28:08,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-02-14 21:28:08,775 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.1401869158878504) internal successors, (229), 107 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2023-02-14 21:28:08,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:28:08,776 INFO L225 Difference]: With dead ends: 236 [2023-02-14 21:28:08,776 INFO L226 Difference]: Without dead ends: 217 [2023-02-14 21:28:08,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 414 SyntacticMatches, 2 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5746 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=15267, Invalid=26963, Unknown=0, NotChecked=0, Total=42230 [2023-02-14 21:28:08,784 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 21:28:08,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 116 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 21:28:08,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-02-14 21:28:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2023-02-14 21:28:08,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.013953488372093) internal successors, (218), 215 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:28:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2023-02-14 21:28:08,798 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 211 [2023-02-14 21:28:08,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:28:08,798 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2023-02-14 21:28:08,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.1401869158878504) internal successors, (229), 107 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:28:08,799 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2023-02-14 21:28:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-02-14 21:28:08,801 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:28:08,801 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:28:08,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 21:28:09,006 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 [2023-02-14 21:28:09,007 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:28:09,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:28:09,007 INFO L85 PathProgramCache]: Analyzing trace with hash 643219628, now seen corresponding path program 4 times [2023-02-14 21:28:09,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:28:09,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928064621] [2023-02-14 21:28:09,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:28:09,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:28:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:28:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9809 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 21:28:14,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:28:14,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928064621] [2023-02-14 21:28:14,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928064621] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:28:14,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181860863] [2023-02-14 21:28:14,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 21:28:14,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:28:14,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:28:14,315 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) [2023-02-14 21:28:14,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 21:28:14,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 21:28:14,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:28:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 101 conjunts are in the unsatisfiable core [2023-02-14 21:28:14,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:28:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9809 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 21:28:14,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:28:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9809 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 21:28:23,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181860863] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:28:23,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:28:23,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-02-14 21:28:23,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828442951] [2023-02-14 21:28:23,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:28:23,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-02-14 21:28:23,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:28:23,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-02-14 21:28:23,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-02-14 21:28:23,878 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand has 203 states, 203 states have (on average 2.039408866995074) internal successors, (414), 203 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:28:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:28:24,753 INFO L93 Difference]: Finished difference Result 433 states and 537 transitions. [2023-02-14 21:28:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-02-14 21:28:24,754 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.039408866995074) internal successors, (414), 203 states have internal predecessors, (414), 0 states have call successors, (0), 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 215 [2023-02-14 21:28:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:28:24,756 INFO L225 Difference]: With dead ends: 433 [2023-02-14 21:28:24,756 INFO L226 Difference]: Without dead ends: 418 [2023-02-14 21:28:24,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-02-14 21:28:24,760 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 21:28:24,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 68 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 21:28:24,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-02-14 21:28:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2023-02-14 21:28:24,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.0071942446043165) internal successors, (420), 417 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:28:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 420 transitions. [2023-02-14 21:28:24,779 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 420 transitions. Word has length 215 [2023-02-14 21:28:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:28:24,779 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 420 transitions. [2023-02-14 21:28:24,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.039408866995074) internal successors, (414), 203 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:28:24,780 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 420 transitions. [2023-02-14 21:28:24,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2023-02-14 21:28:24,785 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:28:24,785 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:28:24,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 21:28:24,993 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 [2023-02-14 21:28:24,993 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:28:24,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:28:24,994 INFO L85 PathProgramCache]: Analyzing trace with hash -53038942, now seen corresponding path program 5 times [2023-02-14 21:28:24,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:28:24,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414689181] [2023-02-14 21:28:24,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:28:24,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:28:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:28:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 40008 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 21:28:44,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:28:44,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414689181] [2023-02-14 21:28:44,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414689181] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:28:44,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524606236] [2023-02-14 21:28:44,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 21:28:44,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:28:44,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:28:44,791 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) [2023-02-14 21:28:44,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process