./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-properties/list_search-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/list-properties/list_search-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 b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 00:31:08,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 00:31:08,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 00:31:08,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 00:31:08,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 00:31:08,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 00:31:08,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 00:31:08,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 00:31:08,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 00:31:08,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 00:31:08,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 00:31:08,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 00:31:08,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 00:31:08,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 00:31:08,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 00:31:08,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 00:31:08,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 00:31:08,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 00:31:08,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 00:31:08,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 00:31:08,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 00:31:08,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 00:31:08,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 00:31:08,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 00:31:08,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 00:31:08,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 00:31:08,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 00:31:08,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 00:31:08,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 00:31:08,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 00:31:08,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 00:31:08,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 00:31:08,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 00:31:08,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 00:31:08,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 00:31:08,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 00:31:08,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 00:31:08,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 00:31:08,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 00:31:08,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 00:31:08,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 00:31:08,661 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 00:31:08,678 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 00:31:08,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 00:31:08,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 00:31:08,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 00:31:08,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 00:31:08,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 00:31:08,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 00:31:08,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 00:31:08,682 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 00:31:08,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 00:31:08,683 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 00:31:08,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 00:31:08,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 00:31:08,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 00:31:08,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 00:31:08,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 00:31:08,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 00:31:08,684 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 00:31:08,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 00:31:08,684 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 00:31:08,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 00:31:08,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 00:31:08,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 00:31:08,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 00:31:08,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 00:31:08,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 00:31:08,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 00:31:08,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 00:31:08,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 00:31:08,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 00:31:08,686 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 00:31:08,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 00:31:08,686 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 00:31:08,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 00:31:08,687 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 00:31:08,687 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 [2023-02-17 00:31:08,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 00:31:08,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 00:31:08,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 00:31:08,902 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 00:31:08,902 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 00:31:08,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_search-2.i [2023-02-17 00:31:09,955 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 00:31:10,176 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 00:31:10,176 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i [2023-02-17 00:31:10,190 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5f59a3f9/e7a8b3fd8c794ef6a912ba5aa2f619b1/FLAG352f33244 [2023-02-17 00:31:10,545 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5f59a3f9/e7a8b3fd8c794ef6a912ba5aa2f619b1 [2023-02-17 00:31:10,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 00:31:10,548 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 00:31:10,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 00:31:10,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 00:31:10,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 00:31:10,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 12:31:10" (1/1) ... [2023-02-17 00:31:10,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69617b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10, skipping insertion in model container [2023-02-17 00:31:10,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 12:31:10" (1/1) ... [2023-02-17 00:31:10,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 00:31:10,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 00:31:10,678 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/list-properties/list_search-2.i[813,826] [2023-02-17 00:31:10,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 00:31:10,848 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 00:31:10,857 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/list-properties/list_search-2.i[813,826] [2023-02-17 00:31:10,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 00:31:10,924 INFO L208 MainTranslator]: Completed translation [2023-02-17 00:31:10,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10 WrapperNode [2023-02-17 00:31:10,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 00:31:10,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 00:31:10,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 00:31:10,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 00:31:10,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10" (1/1) ... [2023-02-17 00:31:10,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10" (1/1) ... [2023-02-17 00:31:10,973 INFO L138 Inliner]: procedures = 226, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 101 [2023-02-17 00:31:10,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 00:31:10,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 00:31:10,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 00:31:10,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 00:31:10,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10" (1/1) ... [2023-02-17 00:31:10,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10" (1/1) ... [2023-02-17 00:31:10,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10" (1/1) ... [2023-02-17 00:31:10,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10" (1/1) ... [2023-02-17 00:31:10,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10" (1/1) ... [2023-02-17 00:31:11,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10" (1/1) ... [2023-02-17 00:31:11,006 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10" (1/1) ... [2023-02-17 00:31:11,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10" (1/1) ... [2023-02-17 00:31:11,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 00:31:11,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 00:31:11,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 00:31:11,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 00:31:11,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10" (1/1) ... [2023-02-17 00:31:11,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 00:31:11,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:31:11,040 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 00:31:11,045 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 00:31:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 00:31:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 00:31:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 00:31:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 00:31:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 00:31:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 00:31:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 00:31:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2023-02-17 00:31:11,070 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2023-02-17 00:31:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 00:31:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 00:31:11,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 00:31:11,160 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 00:31:11,162 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 00:31:11,301 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 00:31:11,305 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 00:31:11,305 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-17 00:31:11,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 12:31:11 BoogieIcfgContainer [2023-02-17 00:31:11,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 00:31:11,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 00:31:11,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 00:31:11,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 00:31:11,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 12:31:10" (1/3) ... [2023-02-17 00:31:11,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4977f44c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 12:31:11, skipping insertion in model container [2023-02-17 00:31:11,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:31:10" (2/3) ... [2023-02-17 00:31:11,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4977f44c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 12:31:11, skipping insertion in model container [2023-02-17 00:31:11,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 12:31:11" (3/3) ... [2023-02-17 00:31:11,312 INFO L112 eAbstractionObserver]: Analyzing ICFG list_search-2.i [2023-02-17 00:31:11,323 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 00:31:11,323 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 00:31:11,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 00:31:11,359 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;@5c47c051, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 00:31:11,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 00:31:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 00:31:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 00:31:11,380 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:31:11,381 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:31:11,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:31:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:31:11,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1135484681, now seen corresponding path program 1 times [2023-02-17 00:31:11,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:31:11,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038999535] [2023-02-17 00:31:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:31:11,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:31:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:11,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:31:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:11,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:31:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:11,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:31:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:11,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:31:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 00:31:11,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:31:11,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038999535] [2023-02-17 00:31:11,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038999535] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:31:11,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592309115] [2023-02-17 00:31:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:31:11,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:31:11,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:31:11,933 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 00:31:11,934 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 00:31:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:12,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 00:31:12,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:31:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 00:31:12,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 00:31:12,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592309115] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:31:12,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 00:31:12,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2023-02-17 00:31:12,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294374619] [2023-02-17 00:31:12,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:31:12,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 00:31:12,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:31:12,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 00:31:12,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-17 00:31:12,106 INFO L87 Difference]: Start difference. First operand has 36 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:31:12,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:31:12,124 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2023-02-17 00:31:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 00:31:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-02-17 00:31:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:31:12,130 INFO L225 Difference]: With dead ends: 56 [2023-02-17 00:31:12,130 INFO L226 Difference]: Without dead ends: 25 [2023-02-17 00:31:12,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-17 00:31:12,136 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:31:12,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:31:12,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-17 00:31:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-17 00:31:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 00:31:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-02-17 00:31:12,165 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 37 [2023-02-17 00:31:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:31:12,167 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-02-17 00:31:12,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:31:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-02-17 00:31:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 00:31:12,169 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:31:12,170 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:31:12,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 00:31:12,375 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 00:31:12,375 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:31:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:31:12,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1275349378, now seen corresponding path program 1 times [2023-02-17 00:31:12,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:31:12,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676184256] [2023-02-17 00:31:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:31:12,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:31:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:12,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:31:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:12,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:31:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:12,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:31:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:12,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:31:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 00:31:12,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:31:12,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676184256] [2023-02-17 00:31:12,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676184256] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:31:12,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891058562] [2023-02-17 00:31:12,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:31:12,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:31:12,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:31:12,631 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 00:31:12,633 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 00:31:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:12,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 00:31:12,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:31:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 00:31:12,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:31:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 00:31:12,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891058562] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:31:12,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:31:12,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2023-02-17 00:31:12,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173995776] [2023-02-17 00:31:12,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:31:12,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 00:31:12,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:31:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 00:31:12,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-17 00:31:12,831 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 00:31:12,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:31:12,903 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-02-17 00:31:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 00:31:12,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2023-02-17 00:31:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:31:12,905 INFO L225 Difference]: With dead ends: 51 [2023-02-17 00:31:12,906 INFO L226 Difference]: Without dead ends: 31 [2023-02-17 00:31:12,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-02-17 00:31:12,907 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:31:12,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 86 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:31:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-17 00:31:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-02-17 00:31:12,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 00:31:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-02-17 00:31:12,919 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 39 [2023-02-17 00:31:12,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:31:12,919 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-02-17 00:31:12,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 00:31:12,920 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-02-17 00:31:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 00:31:12,922 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:31:12,923 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:31:12,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 00:31:13,133 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 00:31:13,133 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:31:13,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:31:13,134 INFO L85 PathProgramCache]: Analyzing trace with hash 177460864, now seen corresponding path program 1 times [2023-02-17 00:31:13,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:31:13,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818969409] [2023-02-17 00:31:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:31:13,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:31:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:31:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:31:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:31:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:31:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 00:31:13,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:31:13,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818969409] [2023-02-17 00:31:13,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818969409] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:31:13,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:31:13,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 00:31:13,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798796955] [2023-02-17 00:31:13,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:31:13,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 00:31:13,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:31:13,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 00:31:13,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:31:13,254 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:31:13,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:31:13,310 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-02-17 00:31:13,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 00:31:13,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2023-02-17 00:31:13,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:31:13,312 INFO L225 Difference]: With dead ends: 41 [2023-02-17 00:31:13,312 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 00:31:13,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-17 00:31:13,314 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:31:13,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 79 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:31:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 00:31:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-02-17 00:31:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 00:31:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-02-17 00:31:13,322 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 39 [2023-02-17 00:31:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:31:13,322 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-02-17 00:31:13,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:31:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-02-17 00:31:13,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 00:31:13,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:31:13,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:31:13,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 00:31:13,324 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:31:13,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:31:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash 104078038, now seen corresponding path program 1 times [2023-02-17 00:31:13,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:31:13,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098054709] [2023-02-17 00:31:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:31:13,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:31:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:31:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:31:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:31:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:31:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-17 00:31:13,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:31:13,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098054709] [2023-02-17 00:31:13,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098054709] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:31:13,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:31:13,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 00:31:13,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596710517] [2023-02-17 00:31:13,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:31:13,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 00:31:13,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:31:13,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 00:31:13,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-17 00:31:13,508 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:31:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:31:13,547 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-02-17 00:31:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 00:31:13,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2023-02-17 00:31:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:31:13,548 INFO L225 Difference]: With dead ends: 37 [2023-02-17 00:31:13,548 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 00:31:13,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-17 00:31:13,563 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:31:13,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 123 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:31:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 00:31:13,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-17 00:31:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 00:31:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-02-17 00:31:13,567 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 40 [2023-02-17 00:31:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:31:13,568 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-02-17 00:31:13,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:31:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-02-17 00:31:13,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 00:31:13,568 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:31:13,568 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:31:13,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 00:31:13,568 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:31:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:31:13,569 INFO L85 PathProgramCache]: Analyzing trace with hash 161336340, now seen corresponding path program 1 times [2023-02-17 00:31:13,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:31:13,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613121928] [2023-02-17 00:31:13,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:31:13,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:31:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:31:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:31:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:31:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:31:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 00:31:13,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:31:13,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613121928] [2023-02-17 00:31:13,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613121928] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:31:13,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791549278] [2023-02-17 00:31:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:31:13,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:31:13,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:31:13,694 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 00:31:13,696 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 00:31:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:13,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 00:31:13,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:31:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-17 00:31:13,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 00:31:13,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791549278] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:31:13,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 00:31:13,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 10 [2023-02-17 00:31:13,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616885548] [2023-02-17 00:31:13,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:31:13,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 00:31:13,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:31:13,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 00:31:13,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-17 00:31:13,832 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:31:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:31:13,870 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-02-17 00:31:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 00:31:13,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2023-02-17 00:31:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:31:13,871 INFO L225 Difference]: With dead ends: 45 [2023-02-17 00:31:13,871 INFO L226 Difference]: Without dead ends: 36 [2023-02-17 00:31:13,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-02-17 00:31:13,872 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:31:13,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 93 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:31:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-17 00:31:13,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2023-02-17 00:31:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 00:31:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-02-17 00:31:13,875 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 40 [2023-02-17 00:31:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:31:13,875 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-02-17 00:31:13,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 00:31:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-02-17 00:31:13,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 00:31:13,876 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:31:13,876 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:31:13,883 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 00:31:14,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:31:14,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:31:14,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:31:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1968420967, now seen corresponding path program 1 times [2023-02-17 00:31:14,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:31:14,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068282477] [2023-02-17 00:31:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:31:14,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:31:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:14,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:31:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:14,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:31:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:14,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:31:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:14,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:31:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 00:31:14,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:31:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068282477] [2023-02-17 00:31:14,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068282477] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:31:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861154880] [2023-02-17 00:31:14,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:31:14,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:31:14,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:31:14,404 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 00:31:14,407 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 00:31:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:14,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-17 00:31:14,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:31:14,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 00:31:14,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:31:14,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 11 [2023-02-17 00:31:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 00:31:14,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:31:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 00:31:14,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861154880] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:31:14,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:31:14,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2023-02-17 00:31:14,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491274450] [2023-02-17 00:31:14,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:31:14,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 00:31:14,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:31:14,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 00:31:14,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-02-17 00:31:14,682 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-17 00:31:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:31:14,952 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-02-17 00:31:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 00:31:14,953 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2023-02-17 00:31:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:31:14,954 INFO L225 Difference]: With dead ends: 52 [2023-02-17 00:31:14,954 INFO L226 Difference]: Without dead ends: 40 [2023-02-17 00:31:14,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2023-02-17 00:31:14,955 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 77 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 00:31:14,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 222 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 00:31:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-17 00:31:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2023-02-17 00:31:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 00:31:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-02-17 00:31:14,959 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 43 [2023-02-17 00:31:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:31:14,959 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-02-17 00:31:14,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-17 00:31:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-02-17 00:31:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 00:31:14,960 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:31:14,960 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:31:14,967 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 00:31:15,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:31:15,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:31:15,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:31:15,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2034659567, now seen corresponding path program 2 times [2023-02-17 00:31:15,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:31:15,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031993063] [2023-02-17 00:31:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:31:15,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:31:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:15,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:31:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:15,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:31:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:15,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:31:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:15,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:31:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 00:31:15,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:31:15,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031993063] [2023-02-17 00:31:15,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031993063] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:31:15,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350922292] [2023-02-17 00:31:15,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 00:31:15,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:31:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:31:15,493 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 00:31:15,495 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 00:31:15,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 00:31:15,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:31:15,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 00:31:15,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:31:15,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 00:31:15,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 00:31:15,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-02-17 00:31:15,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-17 00:31:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 00:31:15,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:31:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 00:31:15,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350922292] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:31:15,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:31:15,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 21 [2023-02-17 00:31:15,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910502330] [2023-02-17 00:31:15,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:31:15,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 00:31:15,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:31:15,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 00:31:15,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-02-17 00:31:15,734 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-17 00:31:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:31:15,942 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-02-17 00:31:15,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 00:31:15,942 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2023-02-17 00:31:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:31:15,943 INFO L225 Difference]: With dead ends: 53 [2023-02-17 00:31:15,943 INFO L226 Difference]: Without dead ends: 44 [2023-02-17 00:31:15,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 00:31:15,944 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 83 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:31:15,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 151 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:31:15,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-17 00:31:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2023-02-17 00:31:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 00:31:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-02-17 00:31:15,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 44 [2023-02-17 00:31:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:31:15,948 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-02-17 00:31:15,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-17 00:31:15,949 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-02-17 00:31:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-17 00:31:15,949 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:31:15,949 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:31:15,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 00:31:16,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:31:16,154 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:31:16,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:31:16,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1693757662, now seen corresponding path program 3 times [2023-02-17 00:31:16,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:31:16,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439648433] [2023-02-17 00:31:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:31:16,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:31:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:16,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:31:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:16,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 00:31:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:16,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 00:31:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:16,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:31:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:31:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 00:31:16,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:31:16,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439648433] [2023-02-17 00:31:16,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439648433] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:31:16,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447806240] [2023-02-17 00:31:16,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 00:31:16,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:31:16,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:31:16,738 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 00:31:16,762 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 00:31:16,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 00:31:16,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:31:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-17 00:31:16,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:31:16,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 00:31:16,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 00:31:16,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 00:31:16,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 00:31:17,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:31:17,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 64 [2023-02-17 00:31:17,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:31:17,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 58 [2023-02-17 00:31:17,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:31:17,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 74 [2023-02-17 00:31:17,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-02-17 00:31:17,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:31:17,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2023-02-17 00:31:17,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:31:17,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 23 select indices, 23 select index equivalence classes, 0 disjoint index pairs (out of 253 index pairs), introduced 33 new quantified variables, introduced 253 case distinctions, treesize of input 567 treesize of output 2477