./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/sorting_selectionsort_2_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 cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 08:50:23,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 08:50:23,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 08:50:23,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 08:50:23,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 08:50:23,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 08:50:23,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 08:50:23,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 08:50:23,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 08:50:23,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 08:50:23,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 08:50:23,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 08:50:23,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 08:50:23,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 08:50:23,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 08:50:23,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 08:50:23,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 08:50:23,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 08:50:23,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 08:50:23,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 08:50:23,745 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 08:50:23,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 08:50:23,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 08:50:23,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 08:50:23,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 08:50:23,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 08:50:23,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 08:50:23,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 08:50:23,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 08:50:23,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 08:50:23,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 08:50:23,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 08:50:23,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 08:50:23,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 08:50:23,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 08:50:23,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 08:50:23,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 08:50:23,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 08:50:23,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 08:50:23,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 08:50:23,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 08:50:23,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 08:50:23,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 08:50:23,786 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 08:50:23,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 08:50:23,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 08:50:23,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 08:50:23,787 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 08:50:23,787 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 08:50:23,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 08:50:23,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 08:50:23,788 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 08:50:23,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 08:50:23,789 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 08:50:23,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 08:50:23,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 08:50:23,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 08:50:23,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 08:50:23,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 08:50:23,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 08:50:23,790 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 08:50:23,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 08:50:23,791 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 08:50:23,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 08:50:23,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 08:50:23,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 08:50:23,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 08:50:23,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 08:50:23,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 08:50:23,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 08:50:23,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 08:50:23,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 08:50:23,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 08:50:23,793 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 08:50:23,793 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 08:50:23,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 08:50:23,793 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2022-07-19 08:50:23,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 08:50:23,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 08:50:23,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 08:50:23,982 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 08:50:23,982 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 08:50:23,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2022-07-19 08:50:24,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92841a795/f6689e4b712f4b828e2917ce7c6ac831/FLAG0bf62e382 [2022-07-19 08:50:24,404 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 08:50:24,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2022-07-19 08:50:24,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92841a795/f6689e4b712f4b828e2917ce7c6ac831/FLAG0bf62e382 [2022-07-19 08:50:24,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92841a795/f6689e4b712f4b828e2917ce7c6ac831 [2022-07-19 08:50:24,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 08:50:24,421 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 08:50:24,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 08:50:24,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 08:50:24,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 08:50:24,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ebddda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24, skipping insertion in model container [2022-07-19 08:50:24,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 08:50:24,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 08:50:24,550 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2022-07-19 08:50:24,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 08:50:24,575 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 08:50:24,582 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2022-07-19 08:50:24,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 08:50:24,601 INFO L208 MainTranslator]: Completed translation [2022-07-19 08:50:24,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24 WrapperNode [2022-07-19 08:50:24,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 08:50:24,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 08:50:24,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 08:50:24,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 08:50:24,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,640 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 114 [2022-07-19 08:50:24,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 08:50:24,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 08:50:24,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 08:50:24,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 08:50:24,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 08:50:24,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 08:50:24,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 08:50:24,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 08:50:24,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (1/1) ... [2022-07-19 08:50:24,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 08:50:24,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:24,688 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) [2022-07-19 08:50:24,711 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 [2022-07-19 08:50:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 08:50:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 08:50:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 08:50:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 08:50:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 08:50:24,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 08:50:24,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 08:50:24,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 08:50:24,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 08:50:24,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 08:50:24,768 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 08:50:24,769 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 08:50:24,891 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 08:50:24,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 08:50:24,905 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-07-19 08:50:24,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:50:24 BoogieIcfgContainer [2022-07-19 08:50:24,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 08:50:24,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 08:50:24,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 08:50:24,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 08:50:24,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:50:24" (1/3) ... [2022-07-19 08:50:24,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6870f1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:50:24, skipping insertion in model container [2022-07-19 08:50:24,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:24" (2/3) ... [2022-07-19 08:50:24,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6870f1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:50:24, skipping insertion in model container [2022-07-19 08:50:24,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:50:24" (3/3) ... [2022-07-19 08:50:24,926 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2022-07-19 08:50:24,936 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 08:50:24,936 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 08:50:24,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 08:50:24,980 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b803405, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1d684ba4 [2022-07-19 08:50:24,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 08:50:24,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 08:50:24,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 08:50:24,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:24,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:24,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1922481208, now seen corresponding path program 1 times [2022-07-19 08:50:24,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:24,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006669720] [2022-07-19 08:50:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:24,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:50:25,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:25,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006669720] [2022-07-19 08:50:25,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006669720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:50:25,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 08:50:25,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 08:50:25,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871136832] [2022-07-19 08:50:25,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:50:25,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 08:50:25,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:25,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 08:50:25,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 08:50:25,143 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:25,190 INFO L93 Difference]: Finished difference Result 96 states and 155 transitions. [2022-07-19 08:50:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 08:50:25,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 08:50:25,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:25,196 INFO L225 Difference]: With dead ends: 96 [2022-07-19 08:50:25,196 INFO L226 Difference]: Without dead ends: 56 [2022-07-19 08:50:25,199 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 [2022-07-19 08:50:25,201 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 22 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:25,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 76 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-19 08:50:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 38. [2022-07-19 08:50:25,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 08:50:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-07-19 08:50:25,229 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 12 [2022-07-19 08:50:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:25,229 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-07-19 08:50:25,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,230 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-07-19 08:50:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 08:50:25,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:25,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:25,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 08:50:25,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:25,232 INFO L85 PathProgramCache]: Analyzing trace with hash -916904651, now seen corresponding path program 1 times [2022-07-19 08:50:25,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:25,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905460812] [2022-07-19 08:50:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:25,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:50:25,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:25,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905460812] [2022-07-19 08:50:25,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905460812] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:25,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485276053] [2022-07-19 08:50:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:25,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:25,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:25,267 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) [2022-07-19 08:50:25,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 08:50:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 08:50:25,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:50:25,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 08:50:25,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485276053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:50:25,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 08:50:25,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 08:50:25,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084900639] [2022-07-19 08:50:25,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:50:25,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 08:50:25,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:25,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 08:50:25,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 08:50:25,331 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:25,364 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2022-07-19 08:50:25,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 08:50:25,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 08:50:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:25,365 INFO L225 Difference]: With dead ends: 86 [2022-07-19 08:50:25,365 INFO L226 Difference]: Without dead ends: 55 [2022-07-19 08:50:25,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 08:50:25,367 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:25,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 70 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-19 08:50:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2022-07-19 08:50:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 08:50:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-07-19 08:50:25,374 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 16 [2022-07-19 08:50:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:25,374 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-07-19 08:50:25,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-07-19 08:50:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 08:50:25,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:25,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:25,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 08:50:25,593 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 [2022-07-19 08:50:25,594 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:25,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:25,594 INFO L85 PathProgramCache]: Analyzing trace with hash -107558025, now seen corresponding path program 1 times [2022-07-19 08:50:25,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:25,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771523996] [2022-07-19 08:50:25,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:25,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:50:25,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:25,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771523996] [2022-07-19 08:50:25,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771523996] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:25,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836582538] [2022-07-19 08:50:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:25,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:25,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:25,634 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) [2022-07-19 08:50:25,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 08:50:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:25,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 08:50:25,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:50:25,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:50:25,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836582538] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:25,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:25,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 08:50:25,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052043614] [2022-07-19 08:50:25,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:25,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 08:50:25,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:25,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 08:50:25,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 08:50:25,731 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:25,817 INFO L93 Difference]: Finished difference Result 151 states and 212 transitions. [2022-07-19 08:50:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 08:50:25,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 08:50:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:25,819 INFO L225 Difference]: With dead ends: 151 [2022-07-19 08:50:25,819 INFO L226 Difference]: Without dead ends: 114 [2022-07-19 08:50:25,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 08:50:25,820 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 172 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:25,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 96 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:50:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-19 08:50:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-07-19 08:50:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 103 states have internal predecessors, (139), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 08:50:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 157 transitions. [2022-07-19 08:50:25,831 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 157 transitions. Word has length 16 [2022-07-19 08:50:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:25,832 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 157 transitions. [2022-07-19 08:50:25,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 157 transitions. [2022-07-19 08:50:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 08:50:25,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:25,833 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:25,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:26,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 08:50:26,048 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:26,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2071104259, now seen corresponding path program 2 times [2022-07-19 08:50:26,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:26,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124879018] [2022-07-19 08:50:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:26,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 08:50:26,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:26,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124879018] [2022-07-19 08:50:26,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124879018] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:50:26,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 08:50:26,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 08:50:26,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714088848] [2022-07-19 08:50:26,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:50:26,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 08:50:26,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 08:50:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 08:50:26,133 INFO L87 Difference]: Start difference. First operand 114 states and 157 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:26,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:26,191 INFO L93 Difference]: Finished difference Result 212 states and 294 transitions. [2022-07-19 08:50:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 08:50:26,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-19 08:50:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:26,195 INFO L225 Difference]: With dead ends: 212 [2022-07-19 08:50:26,195 INFO L226 Difference]: Without dead ends: 118 [2022-07-19 08:50:26,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 08:50:26,198 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 97 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 [2022-07-19 08:50:26,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 97 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:26,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-19 08:50:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-07-19 08:50:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 104 states have (on average 1.3461538461538463) internal successors, (140), 104 states have internal predecessors, (140), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 08:50:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2022-07-19 08:50:26,214 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 22 [2022-07-19 08:50:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:26,214 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2022-07-19 08:50:26,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2022-07-19 08:50:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 08:50:26,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:26,216 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:26,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 08:50:26,216 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:26,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:26,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1079334847, now seen corresponding path program 1 times [2022-07-19 08:50:26,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:26,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443216144] [2022-07-19 08:50:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:26,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 08:50:26,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:26,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443216144] [2022-07-19 08:50:26,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443216144] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278565358] [2022-07-19 08:50:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:26,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:26,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:26,303 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) [2022-07-19 08:50:26,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 08:50:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:26,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 08:50:26,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:50:26,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:50:26,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278565358] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:26,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:26,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-07-19 08:50:26,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611158596] [2022-07-19 08:50:26,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:26,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 08:50:26,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:26,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 08:50:26,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-07-19 08:50:26,455 INFO L87 Difference]: Start difference. First operand 115 states and 158 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:26,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:26,651 INFO L93 Difference]: Finished difference Result 376 states and 540 transitions. [2022-07-19 08:50:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 08:50:26,652 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-19 08:50:26,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:26,653 INFO L225 Difference]: With dead ends: 376 [2022-07-19 08:50:26,654 INFO L226 Difference]: Without dead ends: 272 [2022-07-19 08:50:26,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=179, Unknown=0, NotChecked=0, Total=306 [2022-07-19 08:50:26,656 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 463 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:26,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 265 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:50:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-07-19 08:50:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 265. [2022-07-19 08:50:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 242 states have (on average 1.3512396694214877) internal successors, (327), 242 states have internal predecessors, (327), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-19 08:50:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 369 transitions. [2022-07-19 08:50:26,691 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 369 transitions. Word has length 25 [2022-07-19 08:50:26,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:26,691 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 369 transitions. [2022-07-19 08:50:26,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 369 transitions. [2022-07-19 08:50:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 08:50:26,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:26,694 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:26,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:26,911 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 [2022-07-19 08:50:26,911 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:26,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:26,912 INFO L85 PathProgramCache]: Analyzing trace with hash -34194041, now seen corresponding path program 2 times [2022-07-19 08:50:26,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:26,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312250552] [2022-07-19 08:50:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:26,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-19 08:50:26,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:26,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312250552] [2022-07-19 08:50:26,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312250552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:50:26,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 08:50:26,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 08:50:26,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060028012] [2022-07-19 08:50:26,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:50:26,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 08:50:26,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:26,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 08:50:26,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 08:50:26,969 INFO L87 Difference]: Start difference. First operand 265 states and 369 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:26,997 INFO L93 Difference]: Finished difference Result 485 states and 684 transitions. [2022-07-19 08:50:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 08:50:26,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-19 08:50:26,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:26,999 INFO L225 Difference]: With dead ends: 485 [2022-07-19 08:50:26,999 INFO L226 Difference]: Without dead ends: 260 [2022-07-19 08:50:27,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 08:50:27,000 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:27,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-19 08:50:27,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-07-19 08:50:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 238 states have (on average 1.3487394957983194) internal successors, (321), 238 states have internal predecessors, (321), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-19 08:50:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 361 transitions. [2022-07-19 08:50:27,010 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 361 transitions. Word has length 40 [2022-07-19 08:50:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:27,010 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 361 transitions. [2022-07-19 08:50:27,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:27,011 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 361 transitions. [2022-07-19 08:50:27,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 08:50:27,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:27,012 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:27,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 08:50:27,012 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:27,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1753085294, now seen corresponding path program 1 times [2022-07-19 08:50:27,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:27,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745684716] [2022-07-19 08:50:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:27,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:27,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:27,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745684716] [2022-07-19 08:50:27,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745684716] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:27,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13412543] [2022-07-19 08:50:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:27,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:27,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:27,149 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) [2022-07-19 08:50:27,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 08:50:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:27,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 08:50:27,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:27,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:27,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13412543] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:27,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:27,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-19 08:50:27,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831404232] [2022-07-19 08:50:27,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:27,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 08:50:27,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:27,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 08:50:27,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 08:50:27,425 INFO L87 Difference]: Start difference. First operand 260 states and 361 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:27,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:27,781 INFO L93 Difference]: Finished difference Result 785 states and 1130 transitions. [2022-07-19 08:50:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 08:50:27,782 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-19 08:50:27,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:27,784 INFO L225 Difference]: With dead ends: 785 [2022-07-19 08:50:27,784 INFO L226 Difference]: Without dead ends: 548 [2022-07-19 08:50:27,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 08:50:27,785 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 1317 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:27,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1360 Valid, 421 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 08:50:27,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-07-19 08:50:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2022-07-19 08:50:27,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 502 states have (on average 1.3565737051792828) internal successors, (681), 502 states have internal predecessors, (681), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-07-19 08:50:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 769 transitions. [2022-07-19 08:50:27,801 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 769 transitions. Word has length 41 [2022-07-19 08:50:27,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:27,801 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 769 transitions. [2022-07-19 08:50:27,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:27,802 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 769 transitions. [2022-07-19 08:50:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 08:50:27,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:27,803 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:27,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:28,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:28,036 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:28,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1772381526, now seen corresponding path program 2 times [2022-07-19 08:50:28,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:28,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190051902] [2022-07-19 08:50:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:28,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:28,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:28,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190051902] [2022-07-19 08:50:28,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190051902] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:28,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568513080] [2022-07-19 08:50:28,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 08:50:28,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:28,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:28,287 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) [2022-07-19 08:50:28,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 08:50:28,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 08:50:28,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:50:28,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 08:50:28,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:28,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:29,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568513080] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:29,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:29,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-19 08:50:29,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87347190] [2022-07-19 08:50:29,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:29,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 08:50:29,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:29,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 08:50:29,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 08:50:29,022 INFO L87 Difference]: Start difference. First operand 548 states and 769 transitions. Second operand has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:30,087 INFO L93 Difference]: Finished difference Result 1625 states and 2354 transitions. [2022-07-19 08:50:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-19 08:50:30,088 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-19 08:50:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:30,092 INFO L225 Difference]: With dead ends: 1625 [2022-07-19 08:50:30,092 INFO L226 Difference]: Without dead ends: 1124 [2022-07-19 08:50:30,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 08:50:30,094 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 2690 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2781 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:30,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2781 Valid, 942 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 08:50:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-07-19 08:50:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1124. [2022-07-19 08:50:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1030 states have (on average 1.3601941747572817) internal successors, (1401), 1030 states have internal predecessors, (1401), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-07-19 08:50:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1585 transitions. [2022-07-19 08:50:30,121 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1585 transitions. Word has length 65 [2022-07-19 08:50:30,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:30,121 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 1585 transitions. [2022-07-19 08:50:30,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:30,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1585 transitions. [2022-07-19 08:50:30,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-19 08:50:30,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:30,122 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:30,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 08:50:30,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:30,335 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:30,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1315726042, now seen corresponding path program 3 times [2022-07-19 08:50:30,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:30,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25414854] [2022-07-19 08:50:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:30,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:31,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:31,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25414854] [2022-07-19 08:50:31,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25414854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296405945] [2022-07-19 08:50:31,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 08:50:31,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:31,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:31,171 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) [2022-07-19 08:50:31,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 08:50:31,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 08:50:31,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:50:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 08:50:31,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2022-07-19 08:50:31,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 08:50:31,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296405945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:50:31,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 08:50:31,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [49] total 53 [2022-07-19 08:50:31,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97018717] [2022-07-19 08:50:31,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:50:31,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 08:50:31,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:31,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 08:50:31,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=1383, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 08:50:31,275 INFO L87 Difference]: Start difference. First operand 1124 states and 1585 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:31,339 INFO L93 Difference]: Finished difference Result 2152 states and 3073 transitions. [2022-07-19 08:50:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 08:50:31,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-19 08:50:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:31,343 INFO L225 Difference]: With dead ends: 2152 [2022-07-19 08:50:31,343 INFO L226 Difference]: Without dead ends: 1139 [2022-07-19 08:50:31,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1424, Invalid=1438, Unknown=0, NotChecked=0, Total=2862 [2022-07-19 08:50:31,347 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:31,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-07-19 08:50:31,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1126. [2022-07-19 08:50:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1032 states have (on average 1.3604651162790697) internal successors, (1404), 1032 states have internal predecessors, (1404), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-07-19 08:50:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1588 transitions. [2022-07-19 08:50:31,403 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1588 transitions. Word has length 113 [2022-07-19 08:50:31,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:31,403 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1588 transitions. [2022-07-19 08:50:31,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:31,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1588 transitions. [2022-07-19 08:50:31,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-19 08:50:31,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:31,405 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:31,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:31,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:31,622 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:31,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1995784412, now seen corresponding path program 1 times [2022-07-19 08:50:31,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:31,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461275859] [2022-07-19 08:50:31,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:31,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:32,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:32,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461275859] [2022-07-19 08:50:32,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461275859] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:32,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085289037] [2022-07-19 08:50:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:32,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:32,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:32,441 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) [2022-07-19 08:50:32,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 08:50:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:32,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-19 08:50:32,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:32,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:34,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085289037] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:34,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:34,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-07-19 08:50:34,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255858595] [2022-07-19 08:50:34,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:34,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-19 08:50:34,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:34,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-19 08:50:34,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-19 08:50:34,671 INFO L87 Difference]: Start difference. First operand 1126 states and 1588 transitions. Second operand has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:40,102 INFO L93 Difference]: Finished difference Result 3309 states and 4808 transitions. [2022-07-19 08:50:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-19 08:50:40,103 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-19 08:50:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:40,109 INFO L225 Difference]: With dead ends: 3309 [2022-07-19 08:50:40,109 INFO L226 Difference]: Without dead ends: 2278 [2022-07-19 08:50:40,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-19 08:50:40,113 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 7583 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 1125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7770 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1125 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:40,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7770 Valid, 1628 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1125 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 08:50:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2022-07-19 08:50:40,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2278. [2022-07-19 08:50:40,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2088 states have (on average 1.3620689655172413) internal successors, (2844), 2088 states have internal predecessors, (2844), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2022-07-19 08:50:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3220 transitions. [2022-07-19 08:50:40,155 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3220 transitions. Word has length 113 [2022-07-19 08:50:40,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:40,155 INFO L495 AbstractCegarLoop]: Abstraction has 2278 states and 3220 transitions. [2022-07-19 08:50:40,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3220 transitions. [2022-07-19 08:50:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-07-19 08:50:40,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:40,157 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:40,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 08:50:40,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:40,371 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:40,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1143828796, now seen corresponding path program 2 times [2022-07-19 08:50:40,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:40,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543152441] [2022-07-19 08:50:40,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:40,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:43,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:43,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543152441] [2022-07-19 08:50:43,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543152441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:43,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252533048] [2022-07-19 08:50:43,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 08:50:43,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:43,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:43,089 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) [2022-07-19 08:50:43,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 08:50:43,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 08:50:43,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:50:43,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-19 08:50:43,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:43,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:50:50,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252533048] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:50,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:50,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-07-19 08:50:50,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762247558] [2022-07-19 08:50:50,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:51,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-07-19 08:50:51,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:51,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-07-19 08:50:51,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-07-19 08:50:51,025 INFO L87 Difference]: Start difference. First operand 2278 states and 3220 transitions. Second operand has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:51:43,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:51:43,558 INFO L93 Difference]: Finished difference Result 6669 states and 9704 transitions. [2022-07-19 08:51:43,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-07-19 08:51:43,559 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2022-07-19 08:51:43,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:51:43,572 INFO L225 Difference]: With dead ends: 6669 [2022-07-19 08:51:43,572 INFO L226 Difference]: Without dead ends: 4582 [2022-07-19 08:51:43,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-07-19 08:51:43,578 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 16424 mSDsluCounter, 2832 mSDsCounter, 0 mSdLazyCounter, 4234 mSolverCounterSat, 2447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16803 SdHoareTripleChecker+Valid, 3254 SdHoareTripleChecker+Invalid, 6681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2447 IncrementalHoareTripleChecker+Valid, 4234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:51:43,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16803 Valid, 3254 Invalid, 6681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2447 Valid, 4234 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-19 08:51:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2022-07-19 08:51:43,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4582. [2022-07-19 08:51:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4200 states have (on average 1.3628571428571428) internal successors, (5724), 4200 states have internal predecessors, (5724), 380 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2022-07-19 08:51:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 6484 transitions. [2022-07-19 08:51:43,659 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 6484 transitions. Word has length 209 [2022-07-19 08:51:43,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:51:43,660 INFO L495 AbstractCegarLoop]: Abstraction has 4582 states and 6484 transitions. [2022-07-19 08:51:43,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:51:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 6484 transitions. [2022-07-19 08:51:43,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-07-19 08:51:43,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:51:43,663 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:51:43,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 08:51:43,880 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,SelfDestructingSolverStorable10 [2022-07-19 08:51:43,886 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:51:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:51:43,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1342680580, now seen corresponding path program 3 times [2022-07-19 08:51:43,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:51:43,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397175583] [2022-07-19 08:51:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:51:43,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:51:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:51:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 36105 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 08:51:54,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:51:54,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397175583] [2022-07-19 08:51:54,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397175583] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:51:54,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331101953] [2022-07-19 08:51:54,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 08:51:54,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:51:54,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:51:54,098 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) [2022-07-19 08:51:54,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 08:51:54,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 08:51:54,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:51:54,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 08:51:54,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:51:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 36105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2022-07-19 08:51:54,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:51:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2022-07-19 08:51:54,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331101953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:51:54,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:51:54,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 6, 6] total 201 [2022-07-19 08:51:54,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344269600] [2022-07-19 08:51:54,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:51:54,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-07-19 08:51:54,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:51:54,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-07-19 08:51:54,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18942, Invalid=21258, Unknown=0, NotChecked=0, Total=40200 [2022-07-19 08:51:54,790 INFO L87 Difference]: Start difference. First operand 4582 states and 6484 transitions. Second operand has 201 states, 201 states have (on average 2.084577114427861) internal successors, (419), 201 states have internal predecessors, (419), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:45,260 INFO L93 Difference]: Finished difference Result 11193 states and 16590 transitions. [2022-07-19 08:54:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 777 states. [2022-07-19 08:54:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 2.084577114427861) internal successors, (419), 201 states have internal predecessors, (419), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 401 [2022-07-19 08:54:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:45,280 INFO L225 Difference]: With dead ends: 11193 [2022-07-19 08:54:45,280 INFO L226 Difference]: Without dead ends: 6994 [2022-07-19 08:54:45,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1575 GetRequests, 794 SyntacticMatches, 0 SemanticMatches, 781 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171373 ImplicationChecksByTransitivity, 62.2s TimeCoverageRelationStatistics Valid=192074, Invalid=420232, Unknown=0, NotChecked=0, Total=612306 [2022-07-19 08:54:45,326 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 22819 mSDsluCounter, 3617 mSDsCounter, 0 mSdLazyCounter, 4982 mSolverCounterSat, 5431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23202 SdHoareTripleChecker+Valid, 4040 SdHoareTripleChecker+Invalid, 10413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5431 IncrementalHoareTripleChecker+Valid, 4982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:45,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23202 Valid, 4040 Invalid, 10413 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5431 Valid, 4982 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-19 08:54:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6994 states. [2022-07-19 08:54:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6994 to 6963. [2022-07-19 08:54:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6963 states, 6577 states have (on average 1.3233997263189905) internal successors, (8704), 6577 states have internal predecessors, (8704), 384 states have call successors, (384), 1 states have call predecessors, (384), 1 states have return successors, (384), 384 states have call predecessors, (384), 384 states have call successors, (384) [2022-07-19 08:54:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6963 states to 6963 states and 9472 transitions. [2022-07-19 08:54:45,466 INFO L78 Accepts]: Start accepts. Automaton has 6963 states and 9472 transitions. Word has length 401 [2022-07-19 08:54:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:45,467 INFO L495 AbstractCegarLoop]: Abstraction has 6963 states and 9472 transitions. [2022-07-19 08:54:45,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 2.084577114427861) internal successors, (419), 201 states have internal predecessors, (419), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand 6963 states and 9472 transitions. [2022-07-19 08:54:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-07-19 08:54:45,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:45,471 INFO L195 NwaCegarLoop]: trace histogram [192, 192, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:45,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-19 08:54:45,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:45,688 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:45,688 INFO L85 PathProgramCache]: Analyzing trace with hash 367408256, now seen corresponding path program 4 times [2022-07-19 08:54:45,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:45,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998865707] [2022-07-19 08:54:45,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:45,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat