./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de31.c --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/loops-crafted-1/in-de31.c -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 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 00:30:50,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 00:30:50,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 00:30:50,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 00:30:50,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 00:30:50,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 00:30:50,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 00:30:50,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 00:30:50,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 00:30:50,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 00:30:50,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 00:30:50,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 00:30:50,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 00:30:50,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 00:30:50,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 00:30:50,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 00:30:50,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 00:30:50,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 00:30:50,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 00:30:50,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 00:30:50,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 00:30:50,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 00:30:50,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 00:30:50,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 00:30:50,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 00:30:50,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 00:30:50,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 00:30:50,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 00:30:50,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 00:30:50,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 00:30:50,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 00:30:50,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 00:30:50,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 00:30:50,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 00:30:50,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 00:30:50,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 00:30:50,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 00:30:50,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 00:30:50,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 00:30:50,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 00:30:50,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 00:30:50,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 00:30:50,822 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 00:30:50,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 00:30:50,823 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 00:30:50,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 00:30:50,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 00:30:50,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 00:30:50,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 00:30:50,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 00:30:50,824 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 00:30:50,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 00:30:50,825 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 00:30:50,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 00:30:50,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 00:30:50,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 00:30:50,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 00:30:50,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 00:30:50,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 00:30:50,826 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 00:30:50,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 00:30:50,826 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 00:30:50,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 00:30:50,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 00:30:50,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 00:30:50,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 00:30:50,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:30:50,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 00:30:50,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 00:30:50,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 00:30:50,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 00:30:50,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 00:30:50,828 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 00:30:50,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 00:30:50,828 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 00:30:50,828 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 00:30:50,828 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 00:30:50,828 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 [2023-02-18 00:30:51,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 00:30:51,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 00:30:51,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 00:30:51,043 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 00:30:51,044 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 00:30:51,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de31.c [2023-02-18 00:30:52,013 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 00:30:52,125 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 00:30:52,125 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de31.c [2023-02-18 00:30:52,128 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2499f0661/a49e48fe5ce2419bad6d02d485a7f1a6/FLAGfa17aea60 [2023-02-18 00:30:52,140 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2499f0661/a49e48fe5ce2419bad6d02d485a7f1a6 [2023-02-18 00:30:52,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 00:30:52,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 00:30:52,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 00:30:52,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 00:30:52,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 00:30:52,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:30:52" (1/1) ... [2023-02-18 00:30:52,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70e0f6aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52, skipping insertion in model container [2023-02-18 00:30:52,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:30:52" (1/1) ... [2023-02-18 00:30:52,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 00:30:52,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 00:30:52,251 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/loops-crafted-1/in-de31.c[368,381] [2023-02-18 00:30:52,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:30:52,269 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 00:30:52,276 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/loops-crafted-1/in-de31.c[368,381] [2023-02-18 00:30:52,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:30:52,287 INFO L208 MainTranslator]: Completed translation [2023-02-18 00:30:52,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52 WrapperNode [2023-02-18 00:30:52,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 00:30:52,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 00:30:52,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 00:30:52,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 00:30:52,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52" (1/1) ... [2023-02-18 00:30:52,296 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52" (1/1) ... [2023-02-18 00:30:52,305 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2023-02-18 00:30:52,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 00:30:52,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 00:30:52,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 00:30:52,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 00:30:52,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52" (1/1) ... [2023-02-18 00:30:52,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52" (1/1) ... [2023-02-18 00:30:52,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52" (1/1) ... [2023-02-18 00:30:52,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52" (1/1) ... [2023-02-18 00:30:52,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52" (1/1) ... [2023-02-18 00:30:52,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52" (1/1) ... [2023-02-18 00:30:52,316 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52" (1/1) ... [2023-02-18 00:30:52,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52" (1/1) ... [2023-02-18 00:30:52,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 00:30:52,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 00:30:52,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 00:30:52,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 00:30:52,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52" (1/1) ... [2023-02-18 00:30:52,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:30:52,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:52,342 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) [2023-02-18 00:30:52,349 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 [2023-02-18 00:30:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 00:30:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 00:30:52,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 00:30:52,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 00:30:52,409 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 00:30:52,411 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 00:30:52,487 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 00:30:52,491 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 00:30:52,491 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 00:30:52,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:30:52 BoogieIcfgContainer [2023-02-18 00:30:52,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 00:30:52,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 00:30:52,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 00:30:52,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 00:30:52,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 12:30:52" (1/3) ... [2023-02-18 00:30:52,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6211c5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:30:52, skipping insertion in model container [2023-02-18 00:30:52,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:30:52" (2/3) ... [2023-02-18 00:30:52,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6211c5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:30:52, skipping insertion in model container [2023-02-18 00:30:52,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:30:52" (3/3) ... [2023-02-18 00:30:52,500 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de31.c [2023-02-18 00:30:52,511 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 00:30:52,511 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 00:30:52,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 00:30:52,542 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;@21bbb935, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 00:30:52,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 00:30:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:52,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 00:30:52,548 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:52,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:52,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:52,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:52,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1157484939, now seen corresponding path program 1 times [2023-02-18 00:30:52,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:52,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794647937] [2023-02-18 00:30:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:52,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:52,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:52,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794647937] [2023-02-18 00:30:52,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794647937] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:30:52,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:30:52,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 00:30:52,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416583542] [2023-02-18 00:30:52,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:30:52,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 00:30:52,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 00:30:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 00:30:53,014 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:53,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:53,104 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2023-02-18 00:30:53,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 00:30:53,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 00:30:53,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:53,113 INFO L225 Difference]: With dead ends: 35 [2023-02-18 00:30:53,113 INFO L226 Difference]: Without dead ends: 11 [2023-02-18 00:30:53,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:30:53,117 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:53,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:30:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-18 00:30:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-18 00:30:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-02-18 00:30:53,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 9 [2023-02-18 00:30:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:53,137 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-02-18 00:30:53,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-02-18 00:30:53,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 00:30:53,138 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:53,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:53,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 00:30:53,138 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:53,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:53,138 INFO L85 PathProgramCache]: Analyzing trace with hash 722526704, now seen corresponding path program 1 times [2023-02-18 00:30:53,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:53,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150682364] [2023-02-18 00:30:53,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:53,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:53,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:53,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150682364] [2023-02-18 00:30:53,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150682364] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:53,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553890712] [2023-02-18 00:30:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:53,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:53,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:53,222 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) [2023-02-18 00:30:53,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 00:30:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:53,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 00:30:53,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:53,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:53,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553890712] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:53,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:53,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-18 00:30:53,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134828173] [2023-02-18 00:30:53,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:53,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 00:30:53,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:53,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 00:30:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:30:53,308 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:53,382 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2023-02-18 00:30:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 00:30:53,383 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 00:30:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:53,386 INFO L225 Difference]: With dead ends: 37 [2023-02-18 00:30:53,386 INFO L226 Difference]: Without dead ends: 32 [2023-02-18 00:30:53,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:30:53,391 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:53,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 32 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:30:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-18 00:30:53,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2023-02-18 00:30:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-02-18 00:30:53,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2023-02-18 00:30:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:53,406 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-02-18 00:30:53,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:53,407 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-02-18 00:30:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 00:30:53,407 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:53,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:53,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:53,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:53,615 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:53,615 INFO L85 PathProgramCache]: Analyzing trace with hash 19581631, now seen corresponding path program 1 times [2023-02-18 00:30:53,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:53,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266554459] [2023-02-18 00:30:53,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:53,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:53,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:53,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266554459] [2023-02-18 00:30:53,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266554459] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:53,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682867420] [2023-02-18 00:30:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:53,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:53,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:53,850 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) [2023-02-18 00:30:53,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 00:30:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:53,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 00:30:53,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:54,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:54,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682867420] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:54,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:54,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2023-02-18 00:30:54,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957212663] [2023-02-18 00:30:54,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:54,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 00:30:54,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:54,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 00:30:54,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:30:54,213 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:54,744 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2023-02-18 00:30:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 00:30:54,746 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 00:30:54,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:54,746 INFO L225 Difference]: With dead ends: 53 [2023-02-18 00:30:54,746 INFO L226 Difference]: Without dead ends: 37 [2023-02-18 00:30:54,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2023-02-18 00:30:54,747 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 56 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:54,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 54 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:30:54,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-18 00:30:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 20. [2023-02-18 00:30:54,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:54,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-02-18 00:30:54,752 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 12 [2023-02-18 00:30:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:54,753 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-02-18 00:30:54,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:54,753 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-02-18 00:30:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 00:30:54,769 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:54,769 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:54,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:54,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-18 00:30:54,974 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:54,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1563380427, now seen corresponding path program 2 times [2023-02-18 00:30:54,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:54,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181664622] [2023-02-18 00:30:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:54,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:55,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:55,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181664622] [2023-02-18 00:30:55,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181664622] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:55,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969980985] [2023-02-18 00:30:55,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:30:55,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:55,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:55,034 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) [2023-02-18 00:30:55,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 00:30:55,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:30:55,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:55,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 00:30:55,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:55,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:55,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969980985] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:55,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:55,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-18 00:30:55,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688449664] [2023-02-18 00:30:55,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:55,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 00:30:55,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:55,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 00:30:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-02-18 00:30:55,155 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:55,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:55,510 INFO L93 Difference]: Finished difference Result 75 states and 115 transitions. [2023-02-18 00:30:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 00:30:55,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 00:30:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:55,512 INFO L225 Difference]: With dead ends: 75 [2023-02-18 00:30:55,512 INFO L226 Difference]: Without dead ends: 70 [2023-02-18 00:30:55,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2023-02-18 00:30:55,513 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 165 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:55,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 75 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:30:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-18 00:30:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 39. [2023-02-18 00:30:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2023-02-18 00:30:55,522 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 13 [2023-02-18 00:30:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:55,522 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2023-02-18 00:30:55,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2023-02-18 00:30:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 00:30:55,523 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:55,523 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:55,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:55,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:55,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:55,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:55,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1098222449, now seen corresponding path program 2 times [2023-02-18 00:30:55,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:55,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691104021] [2023-02-18 00:30:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:55,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:30:55,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691104021] [2023-02-18 00:30:55,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691104021] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156555989] [2023-02-18 00:30:55,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:30:55,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:55,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:55,772 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) [2023-02-18 00:30:55,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 00:30:55,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:30:55,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:55,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:30:55,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:30:55,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:30:55,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156555989] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:55,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:55,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-02-18 00:30:55,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932705475] [2023-02-18 00:30:55,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:55,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 00:30:55,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:55,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 00:30:55,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:30:55,859 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:55,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:55,951 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2023-02-18 00:30:55,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 00:30:55,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-18 00:30:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:55,952 INFO L225 Difference]: With dead ends: 72 [2023-02-18 00:30:55,952 INFO L226 Difference]: Without dead ends: 62 [2023-02-18 00:30:55,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-18 00:30:55,953 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:55,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 41 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:30:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-18 00:30:55,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2023-02-18 00:30:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2023-02-18 00:30:55,962 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 14 [2023-02-18 00:30:55,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:55,963 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2023-02-18 00:30:55,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2023-02-18 00:30:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 00:30:55,963 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:55,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:55,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 00:30:56,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:56,168 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:56,168 INFO L85 PathProgramCache]: Analyzing trace with hash 854515253, now seen corresponding path program 3 times [2023-02-18 00:30:56,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:56,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549212422] [2023-02-18 00:30:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:56,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:56,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:56,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549212422] [2023-02-18 00:30:56,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549212422] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:56,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280714159] [2023-02-18 00:30:56,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:30:56,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:56,380 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) [2023-02-18 00:30:56,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 00:30:56,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 00:30:56,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:56,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-18 00:30:56,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:56,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:30:56,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280714159] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:56,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:56,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2023-02-18 00:30:56,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792559599] [2023-02-18 00:30:56,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:56,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 00:30:56,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:56,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 00:30:56,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-02-18 00:30:56,836 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:57,818 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2023-02-18 00:30:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 00:30:57,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 00:30:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:57,820 INFO L225 Difference]: With dead ends: 97 [2023-02-18 00:30:57,820 INFO L226 Difference]: Without dead ends: 73 [2023-02-18 00:30:57,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 00:30:57,821 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:57,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 83 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:30:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-18 00:30:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2023-02-18 00:30:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:57,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2023-02-18 00:30:57,833 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 15 [2023-02-18 00:30:57,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:57,833 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2023-02-18 00:30:57,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:57,833 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2023-02-18 00:30:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 00:30:57,834 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:57,834 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:57,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:58,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:58,039 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:58,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:58,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1966551549, now seen corresponding path program 4 times [2023-02-18 00:30:58,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:58,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015047699] [2023-02-18 00:30:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:58,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:30:58,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:58,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015047699] [2023-02-18 00:30:58,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015047699] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:58,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533328263] [2023-02-18 00:30:58,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:30:58,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:58,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:58,098 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) [2023-02-18 00:30:58,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 00:30:58,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:30:58,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:58,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:30:58,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:30:58,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:30:58,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533328263] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:58,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:58,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2023-02-18 00:30:58,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440026343] [2023-02-18 00:30:58,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:58,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 00:30:58,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 00:30:58,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:30:58,212 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:30:58,374 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2023-02-18 00:30:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 00:30:58,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 00:30:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:30:58,375 INFO L225 Difference]: With dead ends: 84 [2023-02-18 00:30:58,375 INFO L226 Difference]: Without dead ends: 69 [2023-02-18 00:30:58,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-02-18 00:30:58,376 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:30:58,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 79 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:30:58,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-18 00:30:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2023-02-18 00:30:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2023-02-18 00:30:58,392 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 17 [2023-02-18 00:30:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:30:58,393 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2023-02-18 00:30:58,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:30:58,393 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2023-02-18 00:30:58,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 00:30:58,393 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:30:58,394 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:30:58,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 00:30:58,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:58,601 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:30:58,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:30:58,601 INFO L85 PathProgramCache]: Analyzing trace with hash -73381852, now seen corresponding path program 5 times [2023-02-18 00:30:58,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:30:58,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736290792] [2023-02-18 00:30:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:30:58,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:30:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:30:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:30:58,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:30:58,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736290792] [2023-02-18 00:30:58,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736290792] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:30:58,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988602880] [2023-02-18 00:30:58,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:30:58,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:30:58,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:30:58,685 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:30:58,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 00:30:58,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 00:30:58,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:30:58,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 00:30:58,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:30:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:30:58,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:30:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:30:58,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988602880] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:30:58,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:30:58,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-02-18 00:30:58,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133074606] [2023-02-18 00:30:58,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:30:58,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 00:30:58,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:30:58,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 00:30:58,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-02-18 00:30:58,869 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:01,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:01,387 INFO L93 Difference]: Finished difference Result 154 states and 221 transitions. [2023-02-18 00:31:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-18 00:31:01,397 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 00:31:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:01,397 INFO L225 Difference]: With dead ends: 154 [2023-02-18 00:31:01,397 INFO L226 Difference]: Without dead ends: 145 [2023-02-18 00:31:01,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1418, Invalid=3838, Unknown=0, NotChecked=0, Total=5256 [2023-02-18 00:31:01,399 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 321 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:01,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 132 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:31:01,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-18 00:31:01,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 71. [2023-02-18 00:31:01,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4) internal successors, (98), 70 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 98 transitions. [2023-02-18 00:31:01,421 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 98 transitions. Word has length 17 [2023-02-18 00:31:01,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:01,421 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 98 transitions. [2023-02-18 00:31:01,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 98 transitions. [2023-02-18 00:31:01,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 00:31:01,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:01,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:01,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 00:31:01,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:01,625 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:01,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:01,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1333529985, now seen corresponding path program 6 times [2023-02-18 00:31:01,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:01,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327153040] [2023-02-18 00:31:01,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:01,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:01,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:01,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327153040] [2023-02-18 00:31:01,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327153040] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:01,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054334629] [2023-02-18 00:31:01,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:31:01,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:01,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:01,878 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:31:01,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 00:31:01,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-18 00:31:01,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:01,933 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 00:31:01,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:02,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:03,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054334629] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:03,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:03,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 12] total 27 [2023-02-18 00:31:03,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756409402] [2023-02-18 00:31:03,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:03,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 00:31:03,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 00:31:03,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2023-02-18 00:31:03,147 INFO L87 Difference]: Start difference. First operand 71 states and 98 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:05,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:05,010 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2023-02-18 00:31:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 00:31:05,010 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 00:31:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:05,011 INFO L225 Difference]: With dead ends: 126 [2023-02-18 00:31:05,011 INFO L226 Difference]: Without dead ends: 99 [2023-02-18 00:31:05,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=287, Invalid=1783, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 00:31:05,012 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:05,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 142 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 00:31:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-18 00:31:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2023-02-18 00:31:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 69 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:05,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 95 transitions. [2023-02-18 00:31:05,046 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 95 transitions. Word has length 18 [2023-02-18 00:31:05,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:05,046 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 95 transitions. [2023-02-18 00:31:05,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 95 transitions. [2023-02-18 00:31:05,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 00:31:05,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:05,047 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:05,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 00:31:05,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-18 00:31:05,252 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:05,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:05,252 INFO L85 PathProgramCache]: Analyzing trace with hash 159423631, now seen corresponding path program 7 times [2023-02-18 00:31:05,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:05,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581429534] [2023-02-18 00:31:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:05,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:31:05,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:05,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581429534] [2023-02-18 00:31:05,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581429534] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:05,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591949900] [2023-02-18 00:31:05,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:31:05,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:05,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:05,323 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:31:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:05,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 00:31:05,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 00:31:05,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:31:05,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:31:05,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591949900] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:05,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:05,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2023-02-18 00:31:05,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468346758] [2023-02-18 00:31:05,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:05,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 00:31:05,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 00:31:05,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-02-18 00:31:05,497 INFO L87 Difference]: Start difference. First operand 70 states and 95 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:05,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:05,818 INFO L93 Difference]: Finished difference Result 119 states and 158 transitions. [2023-02-18 00:31:05,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 00:31:05,819 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 00:31:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:05,819 INFO L225 Difference]: With dead ends: 119 [2023-02-18 00:31:05,819 INFO L226 Difference]: Without dead ends: 101 [2023-02-18 00:31:05,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2023-02-18 00:31:05,820 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:05,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 95 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:31:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-18 00:31:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 77. [2023-02-18 00:31:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.381578947368421) internal successors, (105), 76 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 105 transitions. [2023-02-18 00:31:05,851 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 105 transitions. Word has length 20 [2023-02-18 00:31:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:05,852 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 105 transitions. [2023-02-18 00:31:05,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 105 transitions. [2023-02-18 00:31:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 00:31:05,853 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:05,853 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:05,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 00:31:06,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 00:31:06,061 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:06,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2017092107, now seen corresponding path program 8 times [2023-02-18 00:31:06,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:06,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582052858] [2023-02-18 00:31:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:06,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:06,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:06,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582052858] [2023-02-18 00:31:06,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582052858] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:06,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210333828] [2023-02-18 00:31:06,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:31:06,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:06,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:06,388 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:31:06,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 00:31:06,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:31:06,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:06,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-18 00:31:06,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:06,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:07,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210333828] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:07,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:07,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 14] total 35 [2023-02-18 00:31:07,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986191310] [2023-02-18 00:31:07,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:07,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 00:31:07,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:07,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 00:31:07,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 00:31:07,630 INFO L87 Difference]: Start difference. First operand 77 states and 105 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:10,853 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2023-02-18 00:31:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-18 00:31:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-18 00:31:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:10,855 INFO L225 Difference]: With dead ends: 143 [2023-02-18 00:31:10,855 INFO L226 Difference]: Without dead ends: 109 [2023-02-18 00:31:10,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=436, Invalid=2986, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 00:31:10,856 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:10,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 167 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 00:31:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-18 00:31:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2023-02-18 00:31:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4) internal successors, (98), 70 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:10,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 98 transitions. [2023-02-18 00:31:10,884 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 98 transitions. Word has length 21 [2023-02-18 00:31:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:10,884 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 98 transitions. [2023-02-18 00:31:10,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 98 transitions. [2023-02-18 00:31:10,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 00:31:10,885 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:10,885 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:10,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 00:31:11,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 00:31:11,090 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:11,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:11,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2027051824, now seen corresponding path program 9 times [2023-02-18 00:31:11,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:11,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107060312] [2023-02-18 00:31:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:11,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:31:11,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:11,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107060312] [2023-02-18 00:31:11,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107060312] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:11,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874412005] [2023-02-18 00:31:11,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:31:11,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:11,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:11,215 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:31:11,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 00:31:11,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 00:31:11,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:11,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:31:11,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 00:31:11,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-18 00:31:11,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874412005] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:11,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:11,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 8] total 27 [2023-02-18 00:31:11,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635350975] [2023-02-18 00:31:11,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:11,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 00:31:11,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:11,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 00:31:11,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2023-02-18 00:31:11,431 INFO L87 Difference]: Start difference. First operand 71 states and 98 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:12,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:12,168 INFO L93 Difference]: Finished difference Result 143 states and 194 transitions. [2023-02-18 00:31:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 00:31:12,169 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 00:31:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:12,169 INFO L225 Difference]: With dead ends: 143 [2023-02-18 00:31:12,169 INFO L226 Difference]: Without dead ends: 126 [2023-02-18 00:31:12,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=527, Invalid=2665, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 00:31:12,171 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:12,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 168 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:31:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-18 00:31:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2023-02-18 00:31:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 79 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2023-02-18 00:31:12,213 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 22 [2023-02-18 00:31:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:12,213 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2023-02-18 00:31:12,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2023-02-18 00:31:12,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 00:31:12,214 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:12,214 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:12,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 00:31:12,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 00:31:12,417 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:12,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:12,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1622674000, now seen corresponding path program 3 times [2023-02-18 00:31:12,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:12,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964434815] [2023-02-18 00:31:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:12,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:12,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964434815] [2023-02-18 00:31:12,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964434815] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:12,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439663413] [2023-02-18 00:31:12,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:31:12,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:12,562 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:31:12,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 00:31:12,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-18 00:31:12,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:12,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 00:31:12,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:12,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:13,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439663413] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:13,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:13,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-18 00:31:13,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597203370] [2023-02-18 00:31:13,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:13,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 00:31:13,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:13,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 00:31:13,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 00:31:13,061 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:35,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:35,254 INFO L93 Difference]: Finished difference Result 398 states and 540 transitions. [2023-02-18 00:31:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-18 00:31:35,255 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 00:31:35,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:35,256 INFO L225 Difference]: With dead ends: 398 [2023-02-18 00:31:35,256 INFO L226 Difference]: Without dead ends: 371 [2023-02-18 00:31:35,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 15 SyntacticMatches, 14 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=2044, Invalid=4598, Unknown=0, NotChecked=0, Total=6642 [2023-02-18 00:31:35,258 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1039 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:35,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1039 Valid, 347 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-18 00:31:35,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-02-18 00:31:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 119. [2023-02-18 00:31:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.3389830508474576) internal successors, (158), 118 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2023-02-18 00:31:35,321 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 22 [2023-02-18 00:31:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:35,322 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2023-02-18 00:31:35,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2023-02-18 00:31:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 00:31:35,322 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:35,322 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:35,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 00:31:35,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 00:31:35,527 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1230457407, now seen corresponding path program 10 times [2023-02-18 00:31:35,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:35,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233201285] [2023-02-18 00:31:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:35,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:35,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:35,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233201285] [2023-02-18 00:31:35,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233201285] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:35,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638902112] [2023-02-18 00:31:35,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:31:35,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:35,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:35,909 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:31:35,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 00:31:35,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:31:35,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:35,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-18 00:31:35,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:36,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:37,635 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:31:37,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638902112] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:37,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:37,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 35 [2023-02-18 00:31:37,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719901146] [2023-02-18 00:31:37,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:37,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 00:31:37,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:37,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 00:31:37,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 00:31:37,637 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:45,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:31:45,188 INFO L93 Difference]: Finished difference Result 215 states and 263 transitions. [2023-02-18 00:31:45,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-18 00:31:45,188 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 00:31:45,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:31:45,189 INFO L225 Difference]: With dead ends: 215 [2023-02-18 00:31:45,189 INFO L226 Difference]: Without dead ends: 189 [2023-02-18 00:31:45,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 18 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 00:31:45,190 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 101 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:31:45,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 127 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-18 00:31:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-18 00:31:45,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 112. [2023-02-18 00:31:45,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.3423423423423424) internal successors, (149), 111 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 149 transitions. [2023-02-18 00:31:45,258 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 149 transitions. Word has length 24 [2023-02-18 00:31:45,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:31:45,258 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 149 transitions. [2023-02-18 00:31:45,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:31:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 149 transitions. [2023-02-18 00:31:45,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 00:31:45,258 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:31:45,258 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:31:45,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 00:31:45,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 00:31:45,463 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:31:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:31:45,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1431729572, now seen corresponding path program 11 times [2023-02-18 00:31:45,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:31:45,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819904960] [2023-02-18 00:31:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:31:45,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:31:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:31:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:31:45,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:31:45,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819904960] [2023-02-18 00:31:45,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819904960] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:31:45,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861964899] [2023-02-18 00:31:45,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:31:45,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:31:45,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:31:45,649 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:31:45,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 00:31:46,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 00:31:46,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:31:46,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-18 00:31:46,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:31:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:31:46,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:31:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:31:46,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861964899] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:31:46,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:31:46,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2023-02-18 00:31:46,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688403605] [2023-02-18 00:31:46,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:31:46,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 00:31:46,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:31:46,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 00:31:46,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 00:31:46,491 INFO L87 Difference]: Start difference. First operand 112 states and 149 transitions. Second operand has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:19,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 00:33:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:19,383 INFO L93 Difference]: Finished difference Result 386 states and 513 transitions. [2023-02-18 00:33:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2023-02-18 00:33:19,383 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 00:33:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:19,385 INFO L225 Difference]: With dead ends: 386 [2023-02-18 00:33:19,385 INFO L226 Difference]: Without dead ends: 374 [2023-02-18 00:33:19,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 18 SyntacticMatches, 15 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8601 ImplicationChecksByTransitivity, 89.7s TimeCoverageRelationStatistics Valid=6298, Invalid=16654, Unknown=0, NotChecked=0, Total=22952 [2023-02-18 00:33:19,389 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1261 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:19,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1261 Valid, 382 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-02-18 00:33:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-02-18 00:33:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 124. [2023-02-18 00:33:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3414634146341464) internal successors, (165), 123 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2023-02-18 00:33:19,469 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 25 [2023-02-18 00:33:19,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:19,469 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2023-02-18 00:33:19,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:19,469 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2023-02-18 00:33:19,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 00:33:19,470 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:19,470 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:19,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 00:33:19,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:19,670 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:19,670 INFO L85 PathProgramCache]: Analyzing trace with hash -40778609, now seen corresponding path program 12 times [2023-02-18 00:33:19,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:19,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143178647] [2023-02-18 00:33:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:19,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 00:33:19,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:19,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143178647] [2023-02-18 00:33:19,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143178647] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:19,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589306154] [2023-02-18 00:33:19,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:33:19,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:19,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:19,797 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:33:19,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 00:33:19,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 00:33:19,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:19,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:33:19,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 00:33:19,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 00:33:20,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589306154] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:20,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:20,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2023-02-18 00:33:20,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852222320] [2023-02-18 00:33:20,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:20,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 00:33:20,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:20,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 00:33:20,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 00:33:20,134 INFO L87 Difference]: Start difference. First operand 124 states and 165 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:21,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:21,060 INFO L93 Difference]: Finished difference Result 241 states and 307 transitions. [2023-02-18 00:33:21,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 00:33:21,060 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 00:33:21,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:21,061 INFO L225 Difference]: With dead ends: 241 [2023-02-18 00:33:21,061 INFO L226 Difference]: Without dead ends: 179 [2023-02-18 00:33:21,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 00:33:21,062 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:21,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 107 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:33:21,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-18 00:33:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 148. [2023-02-18 00:33:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.3537414965986394) internal successors, (199), 147 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:21,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 199 transitions. [2023-02-18 00:33:21,160 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 199 transitions. Word has length 26 [2023-02-18 00:33:21,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:21,160 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 199 transitions. [2023-02-18 00:33:21,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:21,160 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 199 transitions. [2023-02-18 00:33:21,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 00:33:21,161 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:21,161 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:21,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-18 00:33:21,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 00:33:21,366 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:21,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:21,366 INFO L85 PathProgramCache]: Analyzing trace with hash 881225141, now seen corresponding path program 13 times [2023-02-18 00:33:21,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:21,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426564995] [2023-02-18 00:33:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:21,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:21,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:21,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426564995] [2023-02-18 00:33:21,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426564995] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:21,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405785407] [2023-02-18 00:33:21,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:33:21,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:21,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:21,881 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:33:21,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 00:33:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:21,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-18 00:33:21,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:22,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:33:24,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405785407] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:24,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:24,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 19] total 40 [2023-02-18 00:33:24,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676343463] [2023-02-18 00:33:24,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:24,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 00:33:24,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 00:33:24,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 00:33:24,052 INFO L87 Difference]: Start difference. First operand 148 states and 199 transitions. Second operand has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:33:37,184 INFO L93 Difference]: Finished difference Result 264 states and 320 transitions. [2023-02-18 00:33:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-18 00:33:37,185 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 00:33:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:33:37,186 INFO L225 Difference]: With dead ends: 264 [2023-02-18 00:33:37,186 INFO L226 Difference]: Without dead ends: 230 [2023-02-18 00:33:37,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 17 SyntacticMatches, 21 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=592, Invalid=4664, Unknown=0, NotChecked=0, Total=5256 [2023-02-18 00:33:37,187 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 120 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-18 00:33:37,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 144 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-18 00:33:37,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-02-18 00:33:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 134. [2023-02-18 00:33:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.368421052631579) internal successors, (182), 133 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 182 transitions. [2023-02-18 00:33:37,290 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 182 transitions. Word has length 27 [2023-02-18 00:33:37,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:33:37,290 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 182 transitions. [2023-02-18 00:33:37,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:33:37,290 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 182 transitions. [2023-02-18 00:33:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 00:33:37,291 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:33:37,291 INFO L195 NwaCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:33:37,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-18 00:33:37,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 00:33:37,492 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:33:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:33:37,492 INFO L85 PathProgramCache]: Analyzing trace with hash 949161264, now seen corresponding path program 14 times [2023-02-18 00:33:37,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:33:37,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189788234] [2023-02-18 00:33:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:33:37,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:33:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:33:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:33:37,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:33:37,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189788234] [2023-02-18 00:33:37,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189788234] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:33:37,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816828959] [2023-02-18 00:33:37,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:33:37,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:33:37,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:33:37,757 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:33:37,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 00:33:37,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:33:37,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:33:37,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-18 00:33:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:33:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:33:37,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:33:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:33:38,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816828959] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:33:38,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:33:38,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2023-02-18 00:33:38,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042070262] [2023-02-18 00:33:38,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:33:38,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-18 00:33:38,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:33:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-18 00:33:38,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 00:33:38,345 INFO L87 Difference]: Start difference. First operand 134 states and 182 transitions. Second operand has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:34:45,264 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0)) is different from false [2023-02-18 00:36:50,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 00:36:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:55,291 INFO L93 Difference]: Finished difference Result 509 states and 667 transitions. [2023-02-18 00:36:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2023-02-18 00:36:55,291 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-18 00:36:55,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:55,292 INFO L225 Difference]: With dead ends: 509 [2023-02-18 00:36:55,293 INFO L226 Difference]: Without dead ends: 485 [2023-02-18 00:36:55,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 20 SyntacticMatches, 17 SemanticMatches, 210 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17311 ImplicationChecksByTransitivity, 191.7s TimeCoverageRelationStatistics Valid=10648, Invalid=33663, Unknown=3, NotChecked=418, Total=44732 [2023-02-18 00:36:55,295 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1520 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:55,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 449 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 1154 Invalid, 0 Unknown, 1 Unchecked, 5.1s Time] [2023-02-18 00:36:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-02-18 00:36:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 149. [2023-02-18 00:36:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.3581081081081081) internal successors, (201), 148 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 201 transitions. [2023-02-18 00:36:55,423 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 201 transitions. Word has length 28 [2023-02-18 00:36:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:55,423 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 201 transitions. [2023-02-18 00:36:55,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:55,423 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 201 transitions. [2023-02-18 00:36:55,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 00:36:55,423 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:55,424 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:55,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:55,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 00:36:55,624 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:55,625 INFO L85 PathProgramCache]: Analyzing trace with hash 423173891, now seen corresponding path program 15 times [2023-02-18 00:36:55,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:55,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484224556] [2023-02-18 00:36:55,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:55,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 00:36:55,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:55,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484224556] [2023-02-18 00:36:55,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484224556] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:55,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714740245] [2023-02-18 00:36:55,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:36:55,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:55,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:55,799 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:36:55,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 00:36:56,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 00:36:56,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:56,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 00:36:56,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 00:36:56,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 00:36:56,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714740245] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:56,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:56,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 38 [2023-02-18 00:36:56,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258327975] [2023-02-18 00:36:56,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:56,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-18 00:36:56,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:56,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-18 00:36:56,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 00:36:56,406 INFO L87 Difference]: Start difference. First operand 149 states and 201 transitions. Second operand has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:59,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 00:36:59,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:59,956 INFO L93 Difference]: Finished difference Result 270 states and 341 transitions. [2023-02-18 00:36:59,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-18 00:36:59,956 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-18 00:36:59,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:59,957 INFO L225 Difference]: With dead ends: 270 [2023-02-18 00:36:59,957 INFO L226 Difference]: Without dead ends: 200 [2023-02-18 00:36:59,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 00:36:59,958 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:59,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 165 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-02-18 00:36:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-18 00:37:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 166. [2023-02-18 00:37:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.3333333333333333) internal successors, (220), 165 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 220 transitions. [2023-02-18 00:37:00,103 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 220 transitions. Word has length 29 [2023-02-18 00:37:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:00,104 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 220 transitions. [2023-02-18 00:37:00,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 220 transitions. [2023-02-18 00:37:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 00:37:00,104 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:00,104 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:00,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:00,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:00,309 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:00,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:00,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1268979979, now seen corresponding path program 16 times [2023-02-18 00:37:00,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:00,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515659755] [2023-02-18 00:37:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:00,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 00:37:00,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:00,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515659755] [2023-02-18 00:37:00,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515659755] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:00,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332818066] [2023-02-18 00:37:00,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:37:00,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:00,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:00,443 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:00,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 00:37:00,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:37:00,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:00,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 00:37:00,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 00:37:00,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 00:37:00,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332818066] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:00,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:00,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 12] total 31 [2023-02-18 00:37:00,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427539139] [2023-02-18 00:37:00,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:00,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 00:37:00,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:00,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 00:37:00,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2023-02-18 00:37:00,775 INFO L87 Difference]: Start difference. First operand 166 states and 220 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:01,866 INFO L93 Difference]: Finished difference Result 244 states and 301 transitions. [2023-02-18 00:37:01,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-18 00:37:01,866 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-18 00:37:01,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:01,867 INFO L225 Difference]: With dead ends: 244 [2023-02-18 00:37:01,867 INFO L226 Difference]: Without dead ends: 205 [2023-02-18 00:37:01,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=350, Invalid=2302, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 00:37:01,868 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:01,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 124 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:37:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-18 00:37:02,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 169. [2023-02-18 00:37:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.2976190476190477) internal successors, (218), 168 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 218 transitions. [2023-02-18 00:37:02,008 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 218 transitions. Word has length 29 [2023-02-18 00:37:02,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:02,009 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 218 transitions. [2023-02-18 00:37:02,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:02,009 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 218 transitions. [2023-02-18 00:37:02,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 00:37:02,009 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:02,010 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:02,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-18 00:37:02,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:02,212 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:02,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2029727233, now seen corresponding path program 17 times [2023-02-18 00:37:02,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:02,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207901435] [2023-02-18 00:37:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:02,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:37:02,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:02,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207901435] [2023-02-18 00:37:02,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207901435] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:02,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381483593] [2023-02-18 00:37:02,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:37:02,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:02,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:02,751 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:02,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 00:37:03,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 00:37:03,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:03,446 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-18 00:37:03,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:37:05,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:37:10,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381483593] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:10,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:10,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 27] total 58 [2023-02-18 00:37:10,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743630581] [2023-02-18 00:37:10,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:10,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-18 00:37:10,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:10,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-18 00:37:10,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3001, Unknown=1, NotChecked=0, Total=3306 [2023-02-18 00:37:10,586 INFO L87 Difference]: Start difference. First operand 169 states and 218 transitions. Second operand has 58 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:36,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:36,572 INFO L93 Difference]: Finished difference Result 272 states and 326 transitions. [2023-02-18 00:37:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-18 00:37:36,573 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-18 00:37:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:36,573 INFO L225 Difference]: With dead ends: 272 [2023-02-18 00:37:36,573 INFO L226 Difference]: Without dead ends: 234 [2023-02-18 00:37:36,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 17 SyntacticMatches, 12 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=848, Invalid=7161, Unknown=1, NotChecked=0, Total=8010 [2023-02-18 00:37:36,574 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 137 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:36,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 153 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-02-18 00:37:36,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-02-18 00:37:36,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 153. [2023-02-18 00:37:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.3092105263157894) internal successors, (199), 152 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 199 transitions. [2023-02-18 00:37:36,731 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 199 transitions. Word has length 30 [2023-02-18 00:37:36,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:36,731 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 199 transitions. [2023-02-18 00:37:36,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 199 transitions. [2023-02-18 00:37:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 00:37:36,731 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:36,731 INFO L195 NwaCegarLoop]: trace histogram [16, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:36,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:36,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-18 00:37:36,932 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:36,932 INFO L85 PathProgramCache]: Analyzing trace with hash 767237540, now seen corresponding path program 18 times [2023-02-18 00:37:36,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:36,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421959942] [2023-02-18 00:37:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:36,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:37:37,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:37,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421959942] [2023-02-18 00:37:37,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421959942] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:37,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321747656] [2023-02-18 00:37:37,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:37:37,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:37,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:37,177 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:37,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 00:37:37,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-02-18 00:37:37,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:37,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-18 00:37:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:37:37,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:37:38,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321747656] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:38,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:38,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 40 [2023-02-18 00:37:38,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607183531] [2023-02-18 00:37:38,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:38,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 00:37:38,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:38,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 00:37:38,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1195, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 00:37:38,025 INFO L87 Difference]: Start difference. First operand 153 states and 199 transitions. Second operand has 40 states, 40 states have (on average 1.525) internal successors, (61), 40 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:39:29,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:39:29,254 INFO L93 Difference]: Finished difference Result 713 states and 895 transitions. [2023-02-18 00:39:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-02-18 00:39:29,255 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.525) internal successors, (61), 40 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 00:39:29,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:39:29,257 INFO L225 Difference]: With dead ends: 713 [2023-02-18 00:39:29,257 INFO L226 Difference]: Without dead ends: 625 [2023-02-18 00:39:29,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 26 SyntacticMatches, 20 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3700 ImplicationChecksByTransitivity, 107.5s TimeCoverageRelationStatistics Valid=4275, Invalid=9531, Unknown=0, NotChecked=0, Total=13806 [2023-02-18 00:39:29,258 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 943 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-02-18 00:39:29,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [943 Valid, 520 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-02-18 00:39:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-02-18 00:39:29,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 178. [2023-02-18 00:39:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.3333333333333333) internal successors, (236), 177 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:39:29,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 236 transitions. [2023-02-18 00:39:29,472 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 236 transitions. Word has length 31 [2023-02-18 00:39:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:39:29,473 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 236 transitions. [2023-02-18 00:39:29,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.525) internal successors, (61), 40 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:39:29,473 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 236 transitions. [2023-02-18 00:39:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 00:39:29,473 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:39:29,473 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:39:29,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 00:39:29,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-18 00:39:29,679 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:39:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:39:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash 254889333, now seen corresponding path program 19 times [2023-02-18 00:39:29,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:39:29,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957390558] [2023-02-18 00:39:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:39:29,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:39:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:39:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:39:30,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:39:30,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957390558] [2023-02-18 00:39:30,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957390558] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:39:30,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880307724] [2023-02-18 00:39:30,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:39:30,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:39:30,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:39:30,517 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:39:30,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 00:39:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:39:30,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-18 00:39:30,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:39:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:39:31,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:39:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:39:34,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880307724] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:39:34,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:39:34,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 49 [2023-02-18 00:39:34,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781661249] [2023-02-18 00:39:34,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:39:34,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 00:39:34,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:39:34,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 00:39:34,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 00:39:34,314 INFO L87 Difference]: Start difference. First operand 178 states and 236 transitions. Second operand has 49 states, 49 states have (on average 1.489795918367347) internal successors, (73), 49 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:40:19,784 INFO L93 Difference]: Finished difference Result 386 states and 465 transitions. [2023-02-18 00:40:19,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-18 00:40:19,785 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.489795918367347) internal successors, (73), 49 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-18 00:40:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:40:19,786 INFO L225 Difference]: With dead ends: 386 [2023-02-18 00:40:19,786 INFO L226 Difference]: Without dead ends: 337 [2023-02-18 00:40:19,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 19 SyntacticMatches, 28 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=831, Invalid=6825, Unknown=0, NotChecked=0, Total=7656 [2023-02-18 00:40:19,787 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 172 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-02-18 00:40:19,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 446 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-02-18 00:40:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-02-18 00:40:20,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 188. [2023-02-18 00:40:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.3315508021390374) internal successors, (249), 187 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:20,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 249 transitions. [2023-02-18 00:40:20,057 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 249 transitions. Word has length 33 [2023-02-18 00:40:20,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:40:20,057 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 249 transitions. [2023-02-18 00:40:20,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.489795918367347) internal successors, (73), 49 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:20,057 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 249 transitions. [2023-02-18 00:40:20,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 00:40:20,058 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:40:20,058 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:40:20,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 00:40:20,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:40:20,263 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:40:20,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:40:20,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1463271743, now seen corresponding path program 20 times [2023-02-18 00:40:20,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:40:20,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749121330] [2023-02-18 00:40:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:40:20,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:40:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:40:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 00:40:20,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:40:20,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749121330] [2023-02-18 00:40:20,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749121330] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:40:20,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527206198] [2023-02-18 00:40:20,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:40:20,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:40:20,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:40:20,525 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:40:20,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 00:40:20,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:40:20,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:40:20,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 00:40:20,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:40:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 00:40:20,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:40:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-18 00:40:21,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527206198] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:40:21,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:40:21,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 18] total 44 [2023-02-18 00:40:21,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184768000] [2023-02-18 00:40:21,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:40:21,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 00:40:21,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:40:21,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 00:40:21,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1642, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 00:40:21,160 INFO L87 Difference]: Start difference. First operand 188 states and 249 transitions. Second operand has 44 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:25,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:40:25,325 INFO L93 Difference]: Finished difference Result 324 states and 409 transitions. [2023-02-18 00:40:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-18 00:40:25,325 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-18 00:40:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:40:25,326 INFO L225 Difference]: With dead ends: 324 [2023-02-18 00:40:25,326 INFO L226 Difference]: Without dead ends: 245 [2023-02-18 00:40:25,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=416, Invalid=2664, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 00:40:25,327 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:40:25,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 215 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-18 00:40:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-02-18 00:40:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 202. [2023-02-18 00:40:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.318407960199005) internal successors, (265), 201 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 265 transitions. [2023-02-18 00:40:25,630 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 265 transitions. Word has length 34 [2023-02-18 00:40:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:40:25,630 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 265 transitions. [2023-02-18 00:40:25,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:40:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 265 transitions. [2023-02-18 00:40:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 00:40:25,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:40:25,630 INFO L195 NwaCegarLoop]: trace histogram [18, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:40:25,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 00:40:25,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:40:25,831 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:40:25,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:40:25,831 INFO L85 PathProgramCache]: Analyzing trace with hash -217644651, now seen corresponding path program 21 times [2023-02-18 00:40:25,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:40:25,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901428778] [2023-02-18 00:40:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:40:25,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:40:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:40:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:40:26,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:40:26,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901428778] [2023-02-18 00:40:26,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901428778] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:40:26,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073627840] [2023-02-18 00:40:26,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:40:26,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:40:26,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:40:26,147 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:40:26,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 00:40:28,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-18 00:40:28,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:40:28,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-18 00:40:28,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:40:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:40:28,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:40:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:40:29,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073627840] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:40:29,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:40:29,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-02-18 00:40:29,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341952482] [2023-02-18 00:40:29,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:40:29,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-18 00:40:29,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:40:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-18 00:40:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=2060, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 00:40:29,414 INFO L87 Difference]: Start difference. First operand 202 states and 265 transitions. Second operand has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:41:22,382 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967292) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296) 0) (> (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296) 0)) is different from false [2023-02-18 00:41:40,671 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967292) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296) 0) (> (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296) 0)) is different from false [2023-02-18 00:42:40,323 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967292) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296) 0) (> (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296) 0)) is different from false