./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sum40-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/reducercommutativity/sum40-2.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 d615723bd3f4193c30af142b587a80ce924c7083a75b532c90d98415d1700958 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 19:12:59,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 19:12:59,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 19:12:59,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 19:12:59,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 19:12:59,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 19:12:59,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 19:12:59,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 19:12:59,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 19:12:59,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 19:12:59,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 19:12:59,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 19:12:59,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 19:12:59,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 19:12:59,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 19:12:59,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 19:12:59,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 19:12:59,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 19:12:59,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 19:12:59,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 19:12:59,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 19:12:59,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 19:12:59,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 19:12:59,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 19:12:59,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 19:12:59,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 19:12:59,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 19:12:59,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 19:12:59,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 19:12:59,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 19:12:59,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 19:12:59,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 19:12:59,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 19:12:59,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 19:12:59,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 19:12:59,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 19:12:59,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 19:12:59,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 19:12:59,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 19:12:59,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 19:12:59,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 19:12:59,110 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 19:12:59,131 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 19:12:59,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 19:12:59,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 19:12:59,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 19:12:59,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 19:12:59,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 19:12:59,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 19:12:59,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 19:12:59,134 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 19:12:59,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 19:12:59,135 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 19:12:59,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 19:12:59,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 19:12:59,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 19:12:59,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 19:12:59,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 19:12:59,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 19:12:59,136 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 19:12:59,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 19:12:59,136 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 19:12:59,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 19:12:59,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 19:12:59,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 19:12:59,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 19:12:59,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 19:12:59,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 19:12:59,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 19:12:59,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 19:12:59,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 19:12:59,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 19:12:59,138 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 19:12:59,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 19:12:59,138 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 19:12:59,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 19:12:59,138 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 19:12:59,139 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d615723bd3f4193c30af142b587a80ce924c7083a75b532c90d98415d1700958 [2023-02-17 19:12:59,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 19:12:59,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 19:12:59,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 19:12:59,334 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 19:12:59,334 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 19:12:59,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sum40-2.i [2023-02-17 19:13:00,348 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 19:13:00,533 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 19:13:00,534 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sum40-2.i [2023-02-17 19:13:00,537 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e8b9876/ee0ed398ca7a47c9971c3aedcbb109cc/FLAGfd3383e40 [2023-02-17 19:13:00,546 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e8b9876/ee0ed398ca7a47c9971c3aedcbb109cc [2023-02-17 19:13:00,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 19:13:00,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 19:13:00,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 19:13:00,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 19:13:00,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 19:13:00,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:13:00" (1/1) ... [2023-02-17 19:13:00,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c7db4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00, skipping insertion in model container [2023-02-17 19:13:00,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:13:00" (1/1) ... [2023-02-17 19:13:00,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 19:13:00,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 19:13:00,677 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sum40-2.i[1277,1290] [2023-02-17 19:13:00,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 19:13:00,688 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 19:13:00,703 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sum40-2.i[1277,1290] [2023-02-17 19:13:00,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 19:13:00,716 INFO L208 MainTranslator]: Completed translation [2023-02-17 19:13:00,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00 WrapperNode [2023-02-17 19:13:00,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 19:13:00,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 19:13:00,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 19:13:00,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 19:13:00,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00" (1/1) ... [2023-02-17 19:13:00,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00" (1/1) ... [2023-02-17 19:13:00,748 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-17 19:13:00,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 19:13:00,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 19:13:00,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 19:13:00,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 19:13:00,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00" (1/1) ... [2023-02-17 19:13:00,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00" (1/1) ... [2023-02-17 19:13:00,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00" (1/1) ... [2023-02-17 19:13:00,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00" (1/1) ... [2023-02-17 19:13:00,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00" (1/1) ... [2023-02-17 19:13:00,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00" (1/1) ... [2023-02-17 19:13:00,771 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00" (1/1) ... [2023-02-17 19:13:00,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00" (1/1) ... [2023-02-17 19:13:00,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 19:13:00,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 19:13:00,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 19:13:00,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 19:13:00,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00" (1/1) ... [2023-02-17 19:13:00,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 19:13:00,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:00,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 19:13:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 19:13:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2023-02-17 19:13:00,831 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2023-02-17 19:13:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 19:13:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 19:13:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 19:13:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 19:13:00,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 19:13:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 19:13:00,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 19:13:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 19:13:00,890 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 19:13:00,892 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 19:13:01,069 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 19:13:01,073 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 19:13:01,073 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 19:13:01,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:13:01 BoogieIcfgContainer [2023-02-17 19:13:01,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 19:13:01,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 19:13:01,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 19:13:01,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 19:13:01,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 07:13:00" (1/3) ... [2023-02-17 19:13:01,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b2b04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:13:01, skipping insertion in model container [2023-02-17 19:13:01,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:13:00" (2/3) ... [2023-02-17 19:13:01,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b2b04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:13:01, skipping insertion in model container [2023-02-17 19:13:01,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:13:01" (3/3) ... [2023-02-17 19:13:01,086 INFO L112 eAbstractionObserver]: Analyzing ICFG sum40-2.i [2023-02-17 19:13:01,112 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 19:13:01,113 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 19:13:01,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 19:13:01,147 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5b2fb25a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 19:13:01,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 19:13:01,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 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) [2023-02-17 19:13:01,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 19:13:01,155 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:01,156 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:01,156 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2023-02-17 19:13:01,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:01,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267982649] [2023-02-17 19:13:01,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:01,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:01,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 19:13:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:01,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-17 19:13:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:01,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-17 19:13:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 19:13:01,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:01,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267982649] [2023-02-17 19:13:01,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267982649] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:01,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580818321] [2023-02-17 19:13:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:01,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:01,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:01,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:01,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 19:13:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:01,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-17 19:13:01,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:13:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 19:13:01,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 19:13:01,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580818321] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 19:13:01,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 19:13:01,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-17 19:13:01,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704976048] [2023-02-17 19:13:01,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 19:13:01,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 19:13:01,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:13:01,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 19:13:01,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 19:13:01,590 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 19:13:01,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:13:01,623 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2023-02-17 19:13:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 19:13:01,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-17 19:13:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:13:01,639 INFO L225 Difference]: With dead ends: 50 [2023-02-17 19:13:01,639 INFO L226 Difference]: Without dead ends: 24 [2023-02-17 19:13:01,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 19:13:01,645 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 19:13:01,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 19:13:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-17 19:13:01,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-02-17 19:13:01,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2023-02-17 19:13:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-17 19:13:01,677 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2023-02-17 19:13:01,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:13:01,677 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-17 19:13:01,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 19:13:01,678 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-17 19:13:01,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 19:13:01,679 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:01,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:01,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 19:13:01,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-17 19:13:01,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:01,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:01,887 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2023-02-17 19:13:01,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:01,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315221285] [2023-02-17 19:13:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:01,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:01,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 19:13:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 19:13:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-17 19:13:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 19:13:02,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:02,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315221285] [2023-02-17 19:13:02,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315221285] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:02,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005464602] [2023-02-17 19:13:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:02,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:02,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:02,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:02,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 19:13:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-17 19:13:02,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:13:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 19:13:02,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 19:13:02,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005464602] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 19:13:02,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 19:13:02,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-17 19:13:02,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88672259] [2023-02-17 19:13:02,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 19:13:02,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 19:13:02,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:13:02,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 19:13:02,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 19:13:02,075 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 19:13:02,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:13:02,082 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-02-17 19:13:02,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 19:13:02,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-17 19:13:02,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:13:02,083 INFO L225 Difference]: With dead ends: 42 [2023-02-17 19:13:02,083 INFO L226 Difference]: Without dead ends: 25 [2023-02-17 19:13:02,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 19:13:02,084 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 19:13:02,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 19:13:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-17 19:13:02,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-17 19:13:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2023-02-17 19:13:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-17 19:13:02,088 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2023-02-17 19:13:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:13:02,088 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-17 19:13:02,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 19:13:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-17 19:13:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 19:13:02,089 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:02,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:02,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 19:13:02,294 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,SelfDestructingSolverStorable1 [2023-02-17 19:13:02,295 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:02,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2023-02-17 19:13:02,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:02,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016749699] [2023-02-17 19:13:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:02,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 19:13:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-17 19:13:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 19:13:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 19:13:02,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:02,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016749699] [2023-02-17 19:13:02,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016749699] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:02,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515139858] [2023-02-17 19:13:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:02,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:02,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:02,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:02,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 19:13:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-17 19:13:02,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:13:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 19:13:02,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 19:13:02,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515139858] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 19:13:02,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 19:13:02,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-02-17 19:13:02,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281062687] [2023-02-17 19:13:02,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 19:13:02,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 19:13:02,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:13:02,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 19:13:02,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 19:13:02,511 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 19:13:02,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:13:02,518 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-02-17 19:13:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 19:13:02,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2023-02-17 19:13:02,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:13:02,519 INFO L225 Difference]: With dead ends: 39 [2023-02-17 19:13:02,520 INFO L226 Difference]: Without dead ends: 26 [2023-02-17 19:13:02,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 19:13:02,521 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 19:13:02,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 19:13:02,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-17 19:13:02,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-02-17 19:13:02,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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) [2023-02-17 19:13:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-02-17 19:13:02,524 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2023-02-17 19:13:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:13:02,525 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-02-17 19:13:02,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 19:13:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-02-17 19:13:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 19:13:02,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:02,527 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:02,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 19:13:02,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:02,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:02,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2023-02-17 19:13:02,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:02,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875203886] [2023-02-17 19:13:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:02,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 19:13:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-17 19:13:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 19:13:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 19:13:02,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:02,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875203886] [2023-02-17 19:13:02,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875203886] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:02,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804839883] [2023-02-17 19:13:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:02,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:02,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:02,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 19:13:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:02,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 19:13:02,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:13:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-17 19:13:02,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:13:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-17 19:13:02,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804839883] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:13:02,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:13:02,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-17 19:13:02,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906269128] [2023-02-17 19:13:02,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:13:02,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 19:13:02,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:13:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 19:13:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-17 19:13:02,961 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-17 19:13:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:13:02,987 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-02-17 19:13:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 19:13:02,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2023-02-17 19:13:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:13:02,989 INFO L225 Difference]: With dead ends: 54 [2023-02-17 19:13:02,989 INFO L226 Difference]: Without dead ends: 34 [2023-02-17 19:13:02,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-17 19:13:02,990 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 19:13:02,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 19:13:02,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-17 19:13:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-02-17 19:13:02,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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) [2023-02-17 19:13:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-17 19:13:02,995 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2023-02-17 19:13:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:13:02,995 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-17 19:13:02,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-17 19:13:02,995 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-17 19:13:02,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 19:13:02,996 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:02,996 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:03,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 19:13:03,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:03,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:03,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:03,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2023-02-17 19:13:03,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:03,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644945305] [2023-02-17 19:13:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:03,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:03,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 19:13:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:03,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-17 19:13:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:03,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-17 19:13:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-17 19:13:03,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644945305] [2023-02-17 19:13:03,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644945305] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460490012] [2023-02-17 19:13:03,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 19:13:03,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:03,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:03,262 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:03,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 19:13:03,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 19:13:03,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:13:03,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 19:13:03,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:13:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-17 19:13:03,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:13:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-17 19:13:03,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460490012] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:13:03,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:13:03,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-17 19:13:03,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796281158] [2023-02-17 19:13:03,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:13:03,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 19:13:03,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:13:03,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 19:13:03,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-17 19:13:03,390 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-17 19:13:03,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:13:03,423 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2023-02-17 19:13:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 19:13:03,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2023-02-17 19:13:03,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:13:03,424 INFO L225 Difference]: With dead ends: 70 [2023-02-17 19:13:03,424 INFO L226 Difference]: Without dead ends: 48 [2023-02-17 19:13:03,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-17 19:13:03,425 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 19:13:03,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 19:13:03,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-17 19:13:03,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-17 19:13:03,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 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) [2023-02-17 19:13:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-02-17 19:13:03,430 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2023-02-17 19:13:03,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:13:03,430 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-02-17 19:13:03,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-17 19:13:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-02-17 19:13:03,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 19:13:03,432 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:03,432 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:03,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-17 19:13:03,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:03,637 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:03,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2023-02-17 19:13:03,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:03,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740187820] [2023-02-17 19:13:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:03,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:03,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 19:13:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:03,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-17 19:13:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:03,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-17 19:13:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-17 19:13:03,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:03,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740187820] [2023-02-17 19:13:03,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740187820] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:03,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219914399] [2023-02-17 19:13:03,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 19:13:03,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:03,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:03,815 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:03,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 19:13:03,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 19:13:03,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:13:03,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 19:13:03,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:13:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-02-17 19:13:03,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:13:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-02-17 19:13:03,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219914399] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:13:03,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:13:03,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-17 19:13:03,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636570022] [2023-02-17 19:13:03,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:13:03,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 19:13:03,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:13:03,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 19:13:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-17 19:13:03,925 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 19:13:03,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:13:03,964 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2023-02-17 19:13:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 19:13:03,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2023-02-17 19:13:03,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:13:03,965 INFO L225 Difference]: With dead ends: 82 [2023-02-17 19:13:03,965 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 19:13:03,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-17 19:13:03,966 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 19:13:03,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 19:13:03,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 19:13:03,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-02-17 19:13:03,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 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) [2023-02-17 19:13:03,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-02-17 19:13:03,971 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2023-02-17 19:13:03,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:13:03,971 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-02-17 19:13:03,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 19:13:03,971 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-02-17 19:13:03,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-17 19:13:03,972 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:03,972 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:03,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 19:13:04,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:04,179 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:04,180 INFO L85 PathProgramCache]: Analyzing trace with hash 85970241, now seen corresponding path program 4 times [2023-02-17 19:13:04,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:04,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421909544] [2023-02-17 19:13:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:04,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:04,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 19:13:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:04,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-17 19:13:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:04,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-02-17 19:13:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-02-17 19:13:04,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421909544] [2023-02-17 19:13:04,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421909544] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903683683] [2023-02-17 19:13:04,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 19:13:04,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:04,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:04,362 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:04,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 19:13:04,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 19:13:04,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:13:04,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 19:13:04,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:13:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-02-17 19:13:04,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:13:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-17 19:13:04,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903683683] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:13:04,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:13:04,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2023-02-17 19:13:04,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360616582] [2023-02-17 19:13:04,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:13:04,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 19:13:04,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:13:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 19:13:04,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-02-17 19:13:04,523 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 19:13:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:13:04,570 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2023-02-17 19:13:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 19:13:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2023-02-17 19:13:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:13:04,572 INFO L225 Difference]: With dead ends: 100 [2023-02-17 19:13:04,572 INFO L226 Difference]: Without dead ends: 68 [2023-02-17 19:13:04,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-02-17 19:13:04,573 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 19:13:04,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 19:13:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-17 19:13:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2023-02-17 19:13:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 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) [2023-02-17 19:13:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2023-02-17 19:13:04,577 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2023-02-17 19:13:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:13:04,577 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2023-02-17 19:13:04,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 19:13:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2023-02-17 19:13:04,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-17 19:13:04,578 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:04,579 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:04,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 19:13:04,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:04,784 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:04,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2002416443, now seen corresponding path program 5 times [2023-02-17 19:13:04,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:04,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700216710] [2023-02-17 19:13:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:04,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:04,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-17 19:13:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:04,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 19:13:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:04,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-02-17 19:13:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2023-02-17 19:13:04,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:04,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700216710] [2023-02-17 19:13:04,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700216710] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:04,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463545731] [2023-02-17 19:13:04,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 19:13:04,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:04,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:04,993 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:05,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 19:13:05,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-02-17 19:13:05,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:13:05,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 19:13:05,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:13:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-02-17 19:13:05,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:13:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-02-17 19:13:05,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463545731] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:13:05,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:13:05,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-02-17 19:13:05,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769228920] [2023-02-17 19:13:05,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:13:05,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-17 19:13:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:13:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-17 19:13:05,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-02-17 19:13:05,933 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 19:13:05,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:13:05,991 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2023-02-17 19:13:05,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-17 19:13:05,992 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2023-02-17 19:13:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:13:05,992 INFO L225 Difference]: With dead ends: 126 [2023-02-17 19:13:05,992 INFO L226 Difference]: Without dead ends: 86 [2023-02-17 19:13:05,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-02-17 19:13:05,993 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 19:13:05,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 19:13:05,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-17 19:13:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2023-02-17 19:13:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 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) [2023-02-17 19:13:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2023-02-17 19:13:05,998 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2023-02-17 19:13:05,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:13:05,998 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2023-02-17 19:13:05,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 19:13:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2023-02-17 19:13:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-17 19:13:06,000 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:06,000 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:06,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 19:13:06,221 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,SelfDestructingSolverStorable7 [2023-02-17 19:13:06,222 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:06,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:06,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1921824045, now seen corresponding path program 6 times [2023-02-17 19:13:06,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:06,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605959373] [2023-02-17 19:13:06,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:06,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:06,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-17 19:13:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:06,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-02-17 19:13:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:06,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-02-17 19:13:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2023-02-17 19:13:06,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:06,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605959373] [2023-02-17 19:13:06,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605959373] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:06,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643711342] [2023-02-17 19:13:06,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 19:13:06,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:06,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:06,491 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:06,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 19:13:06,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-02-17 19:13:06,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:13:06,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 19:13:06,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:13:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2023-02-17 19:13:06,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:13:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2023-02-17 19:13:06,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643711342] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:13:06,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:13:06,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2023-02-17 19:13:06,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862875991] [2023-02-17 19:13:06,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:13:06,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-17 19:13:06,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:13:06,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-17 19:13:06,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-02-17 19:13:06,979 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 19:13:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:13:07,035 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2023-02-17 19:13:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-17 19:13:07,035 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2023-02-17 19:13:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:13:07,036 INFO L225 Difference]: With dead ends: 160 [2023-02-17 19:13:07,036 INFO L226 Difference]: Without dead ends: 104 [2023-02-17 19:13:07,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-02-17 19:13:07,037 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 19:13:07,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 120 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 19:13:07,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-17 19:13:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2023-02-17 19:13:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 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) [2023-02-17 19:13:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2023-02-17 19:13:07,042 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2023-02-17 19:13:07,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:13:07,042 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2023-02-17 19:13:07,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 19:13:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2023-02-17 19:13:07,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-02-17 19:13:07,044 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:07,044 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:07,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 19:13:07,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:07,250 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:07,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:07,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1322781599, now seen corresponding path program 7 times [2023-02-17 19:13:07,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:07,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57340607] [2023-02-17 19:13:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:07,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:07,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 19:13:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:07,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-02-17 19:13:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:07,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-02-17 19:13:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-17 19:13:07,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57340607] [2023-02-17 19:13:07,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57340607] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089080124] [2023-02-17 19:13:07,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 19:13:07,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:07,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:07,593 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:07,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 19:13:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:07,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-17 19:13:07,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:13:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-17 19:13:07,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:13:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-17 19:13:08,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089080124] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:13:08,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:13:08,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-17 19:13:08,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395524264] [2023-02-17 19:13:08,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:13:08,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 19:13:08,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:13:08,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 19:13:08,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 19:13:08,064 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-17 19:13:08,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:13:08,137 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2023-02-17 19:13:08,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 19:13:08,137 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2023-02-17 19:13:08,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:13:08,139 INFO L225 Difference]: With dead ends: 207 [2023-02-17 19:13:08,139 INFO L226 Difference]: Without dead ends: 135 [2023-02-17 19:13:08,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 312 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 19:13:08,140 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 19:13:08,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 112 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 19:13:08,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-17 19:13:08,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-02-17 19:13:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 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) [2023-02-17 19:13:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2023-02-17 19:13:08,154 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 168 [2023-02-17 19:13:08,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:13:08,154 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2023-02-17 19:13:08,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-17 19:13:08,155 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2023-02-17 19:13:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-02-17 19:13:08,156 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:08,156 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:08,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 19:13:08,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 19:13:08,362 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1725939777, now seen corresponding path program 8 times [2023-02-17 19:13:08,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:08,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602071598] [2023-02-17 19:13:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:08,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:09,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-02-17 19:13:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:09,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-02-17 19:13:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:09,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2023-02-17 19:13:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-17 19:13:09,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:09,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602071598] [2023-02-17 19:13:09,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602071598] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:09,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142838954] [2023-02-17 19:13:09,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 19:13:09,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:09,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:09,189 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:09,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 19:13:09,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 19:13:09,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:13:09,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 19:13:09,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:13:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-17 19:13:09,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:13:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2023-02-17 19:13:10,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142838954] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:13:10,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:13:10,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 43 [2023-02-17 19:13:10,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037698581] [2023-02-17 19:13:10,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:13:10,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-17 19:13:10,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:13:10,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-17 19:13:10,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 19:13:10,160 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-17 19:13:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:13:10,231 INFO L93 Difference]: Finished difference Result 227 states and 244 transitions. [2023-02-17 19:13:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-17 19:13:10,232 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 200 [2023-02-17 19:13:10,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:13:10,232 INFO L225 Difference]: With dead ends: 227 [2023-02-17 19:13:10,232 INFO L226 Difference]: Without dead ends: 155 [2023-02-17 19:13:10,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 344 SyntacticMatches, 52 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 19:13:10,233 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 19:13:10,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 156 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 19:13:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-17 19:13:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2023-02-17 19:13:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 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) [2023-02-17 19:13:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2023-02-17 19:13:10,238 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 200 [2023-02-17 19:13:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:13:10,238 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2023-02-17 19:13:10,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-17 19:13:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2023-02-17 19:13:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-02-17 19:13:10,240 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:10,240 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 40, 40, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:10,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 19:13:10,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-17 19:13:10,446 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:10,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:10,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1781862573, now seen corresponding path program 9 times [2023-02-17 19:13:10,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:10,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102525674] [2023-02-17 19:13:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:10,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:10,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-02-17 19:13:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:10,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-02-17 19:13:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:10,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2023-02-17 19:13:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3659 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 2615 trivial. 0 not checked. [2023-02-17 19:13:10,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:10,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102525674] [2023-02-17 19:13:10,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102525674] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:10,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205244250] [2023-02-17 19:13:10,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 19:13:10,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:10,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:10,865 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:10,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 19:13:12,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-17 19:13:12,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:13:12,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-17 19:13:12,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:13:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3659 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 2615 trivial. 0 not checked. [2023-02-17 19:13:12,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:13:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3659 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 2615 trivial. 0 not checked. [2023-02-17 19:13:13,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205244250] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:13:13,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:13:13,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2023-02-17 19:13:13,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099762577] [2023-02-17 19:13:13,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:13:13,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 19:13:13,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:13:13,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 19:13:13,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-17 19:13:13,120 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 19:13:13,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:13:13,172 INFO L93 Difference]: Finished difference Result 258 states and 283 transitions. [2023-02-17 19:13:13,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 19:13:13,172 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 220 [2023-02-17 19:13:13,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:13:13,173 INFO L225 Difference]: With dead ends: 258 [2023-02-17 19:13:13,173 INFO L226 Difference]: Without dead ends: 187 [2023-02-17 19:13:13,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 417 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-17 19:13:13,174 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 19:13:13,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 90 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 19:13:13,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-02-17 19:13:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2023-02-17 19:13:13,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 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) [2023-02-17 19:13:13,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2023-02-17 19:13:13,179 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 220 [2023-02-17 19:13:13,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:13:13,179 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2023-02-17 19:13:13,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 19:13:13,179 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2023-02-17 19:13:13,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-02-17 19:13:13,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:13,181 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 40, 40, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:13,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 19:13:13,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-17 19:13:13,390 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:13,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1749087027, now seen corresponding path program 10 times [2023-02-17 19:13:13,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:13,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73760030] [2023-02-17 19:13:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:13,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:13,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-02-17 19:13:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:14,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2023-02-17 19:13:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:14,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-02-17 19:13:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10091 backedges. 0 proven. 4628 refuted. 0 times theorem prover too weak. 5463 trivial. 0 not checked. [2023-02-17 19:13:14,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:14,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73760030] [2023-02-17 19:13:14,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73760030] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:14,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629395085] [2023-02-17 19:13:14,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 19:13:14,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:14,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:14,334 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:14,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 19:13:14,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 19:13:14,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:13:14,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 19:13:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:13:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10091 backedges. 3728 proven. 900 refuted. 0 times theorem prover too weak. 5463 trivial. 0 not checked. [2023-02-17 19:13:14,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:13:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10091 backedges. 3728 proven. 900 refuted. 0 times theorem prover too weak. 5463 trivial. 0 not checked. [2023-02-17 19:13:15,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629395085] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:13:15,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:13:15,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 42 [2023-02-17 19:13:15,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078635464] [2023-02-17 19:13:15,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:13:15,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-17 19:13:15,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:13:15,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-17 19:13:15,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 19:13:15,497 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 19:13:15,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:13:15,565 INFO L93 Difference]: Finished difference Result 310 states and 329 transitions. [2023-02-17 19:13:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-17 19:13:15,565 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 316 [2023-02-17 19:13:15,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:13:15,566 INFO L225 Difference]: With dead ends: 310 [2023-02-17 19:13:15,570 INFO L226 Difference]: Without dead ends: 207 [2023-02-17 19:13:15,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 577 SyntacticMatches, 52 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 19:13:15,572 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 19:13:15,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 19:13:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-17 19:13:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2023-02-17 19:13:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 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) [2023-02-17 19:13:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 211 transitions. [2023-02-17 19:13:15,577 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 211 transitions. Word has length 316 [2023-02-17 19:13:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:13:15,578 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 211 transitions. [2023-02-17 19:13:15,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 19:13:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 211 transitions. [2023-02-17 19:13:15,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2023-02-17 19:13:15,581 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:13:15,581 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 40, 40, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:13:15,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 19:13:15,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-17 19:13:15,787 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:13:15,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:13:15,788 INFO L85 PathProgramCache]: Analyzing trace with hash 176244895, now seen corresponding path program 11 times [2023-02-17 19:13:15,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:13:15,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283124382] [2023-02-17 19:13:15,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:13:15,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:13:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:16,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-02-17 19:13:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:16,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2023-02-17 19:13:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:16,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2023-02-17 19:13:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:13:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16451 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2023-02-17 19:13:16,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:13:16,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283124382] [2023-02-17 19:13:16,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283124382] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:13:16,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310947300] [2023-02-17 19:13:16,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 19:13:16,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:13:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:13:16,233 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:13:16,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 19:16:03,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2023-02-17 19:16:03,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:16:03,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-17 19:16:03,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:16:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16451 backedges. 6570 proven. 196 refuted. 0 times theorem prover too weak. 9685 trivial. 0 not checked. [2023-02-17 19:16:03,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:16:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16451 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2023-02-17 19:16:03,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310947300] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:16:03,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:16:03,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-17 19:16:03,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724033035] [2023-02-17 19:16:03,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:16:03,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 19:16:03,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:16:03,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 19:16:03,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 19:16:03,642 INFO L87 Difference]: Start difference. First operand 207 states and 211 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 19:16:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:16:03,736 INFO L93 Difference]: Finished difference Result 330 states and 350 transitions. [2023-02-17 19:16:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 19:16:03,736 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 376 [2023-02-17 19:16:03,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:16:03,740 INFO L225 Difference]: With dead ends: 330 [2023-02-17 19:16:03,740 INFO L226 Difference]: Without dead ends: 239 [2023-02-17 19:16:03,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 728 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 19:16:03,742 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 19:16:03,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 192 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 19:16:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-02-17 19:16:03,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2023-02-17 19:16:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0128205128205128) internal successors, (237), 234 states have internal predecessors, (237), 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) [2023-02-17 19:16:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 243 transitions. [2023-02-17 19:16:03,754 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 243 transitions. Word has length 376 [2023-02-17 19:16:03,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:16:03,754 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 243 transitions. [2023-02-17 19:16:03,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 19:16:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 243 transitions. [2023-02-17 19:16:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2023-02-17 19:16:03,774 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:16:03,775 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 40, 40, 30, 30, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:16:03,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 19:16:03,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:16:03,989 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:16:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:16:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1634862719, now seen corresponding path program 12 times [2023-02-17 19:16:03,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:16:03,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381017124] [2023-02-17 19:16:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:16:03,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:16:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:16:04,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-02-17 19:16:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:16:04,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2023-02-17 19:16:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:16:04,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-02-17 19:16:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:16:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17155 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2023-02-17 19:16:04,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:16:04,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381017124] [2023-02-17 19:16:04,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381017124] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:16:04,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801647451] [2023-02-17 19:16:04,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 19:16:04,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:16:04,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:16:04,916 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 19:16:04,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 19:17:13,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2023-02-17 19:17:13,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:17:13,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-17 19:17:13,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:17:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17155 backedges. 6570 proven. 900 refuted. 0 times theorem prover too weak. 9685 trivial. 0 not checked. [2023-02-17 19:17:13,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:17:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17155 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2023-02-17 19:17:14,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801647451] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:17:14,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:17:14,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 42 [2023-02-17 19:17:14,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558962728] [2023-02-17 19:17:14,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:17:14,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-17 19:17:14,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:17:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-17 19:17:14,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 19:17:14,571 INFO L87 Difference]: Start difference. First operand 239 states and 243 transitions. Second operand has 42 states, 42 states have (on average 2.5) internal successors, (105), 42 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 19:17:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:17:14,664 INFO L93 Difference]: Finished difference Result 348 states and 361 transitions. [2023-02-17 19:17:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-17 19:17:14,664 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5) internal successors, (105), 42 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 408 [2023-02-17 19:17:14,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:17:14,666 INFO L225 Difference]: With dead ends: 348 [2023-02-17 19:17:14,666 INFO L226 Difference]: Without dead ends: 257 [2023-02-17 19:17:14,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 760 SyntacticMatches, 53 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 19:17:14,672 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 19:17:14,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 19:17:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-02-17 19:17:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2023-02-17 19:17:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.0119047619047619) internal successors, (255), 252 states have internal predecessors, (255), 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) [2023-02-17 19:17:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 261 transitions. [2023-02-17 19:17:14,681 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 261 transitions. Word has length 408 [2023-02-17 19:17:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:17:14,683 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 261 transitions. [2023-02-17 19:17:14,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5) internal successors, (105), 42 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 19:17:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 261 transitions. [2023-02-17 19:17:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2023-02-17 19:17:14,688 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:17:14,688 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 40, 40, 39, 39, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:17:14,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 19:17:14,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 19:17:14,918 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:17:14,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:17:14,918 INFO L85 PathProgramCache]: Analyzing trace with hash -670252659, now seen corresponding path program 13 times [2023-02-17 19:17:14,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:17:14,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109255339] [2023-02-17 19:17:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:17:14,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:17:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat