./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_02.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_two_index_02.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85e78694133d7e011f7a790be665c543ea082543f17d80457e8ec7e008ca566c --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 18:13:29,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 18:13:29,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 18:13:29,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 18:13:29,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 18:13:29,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 18:13:29,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 18:13:29,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 18:13:29,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 18:13:29,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 18:13:29,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 18:13:29,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 18:13:29,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 18:13:29,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 18:13:29,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 18:13:29,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 18:13:29,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 18:13:29,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 18:13:29,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 18:13:29,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 18:13:29,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 18:13:29,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 18:13:29,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 18:13:29,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 18:13:29,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 18:13:29,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 18:13:29,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 18:13:29,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 18:13:29,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 18:13:29,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 18:13:29,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 18:13:29,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 18:13:29,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 18:13:29,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 18:13:29,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 18:13:29,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 18:13:29,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 18:13:29,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 18:13:29,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 18:13:29,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 18:13:29,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 18:13:29,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 18:13:29,465 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 18:13:29,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 18:13:29,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 18:13:29,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 18:13:29,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 18:13:29,467 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 18:13:29,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 18:13:29,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 18:13:29,467 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 18:13:29,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 18:13:29,468 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 18:13:29,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 18:13:29,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 18:13:29,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 18:13:29,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 18:13:29,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 18:13:29,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 18:13:29,469 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 18:13:29,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 18:13:29,469 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 18:13:29,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 18:13:29,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 18:13:29,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 18:13:29,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 18:13:29,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:13:29,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 18:13:29,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 18:13:29,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 18:13:29,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 18:13:29,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 18:13:29,471 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 18:13:29,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 18:13:29,471 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 18:13:29,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 18:13:29,472 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 18:13:29,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85e78694133d7e011f7a790be665c543ea082543f17d80457e8ec7e008ca566c [2023-02-15 18:13:29,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 18:13:29,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 18:13:29,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 18:13:29,642 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 18:13:29,642 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 18:13:29,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_02.i [2023-02-15 18:13:30,562 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 18:13:30,730 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 18:13:30,731 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_02.i [2023-02-15 18:13:30,734 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3ec66b2b/cfd3e2503ff84d7da495676d35401c78/FLAG02c706630 [2023-02-15 18:13:30,743 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3ec66b2b/cfd3e2503ff84d7da495676d35401c78 [2023-02-15 18:13:30,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 18:13:30,745 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 18:13:30,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 18:13:30,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 18:13:30,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 18:13:30,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:13:30" (1/1) ... [2023-02-15 18:13:30,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@147fe515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30, skipping insertion in model container [2023-02-15 18:13:30,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:13:30" (1/1) ... [2023-02-15 18:13:30,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 18:13:30,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 18:13:30,842 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_02.i[814,827] [2023-02-15 18:13:30,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:13:30,855 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 18:13:30,863 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_02.i[814,827] [2023-02-15 18:13:30,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:13:30,883 INFO L208 MainTranslator]: Completed translation [2023-02-15 18:13:30,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30 WrapperNode [2023-02-15 18:13:30,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 18:13:30,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 18:13:30,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 18:13:30,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 18:13:30,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30" (1/1) ... [2023-02-15 18:13:30,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30" (1/1) ... [2023-02-15 18:13:30,906 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-02-15 18:13:30,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 18:13:30,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 18:13:30,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 18:13:30,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 18:13:30,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30" (1/1) ... [2023-02-15 18:13:30,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30" (1/1) ... [2023-02-15 18:13:30,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30" (1/1) ... [2023-02-15 18:13:30,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30" (1/1) ... [2023-02-15 18:13:30,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30" (1/1) ... [2023-02-15 18:13:30,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30" (1/1) ... [2023-02-15 18:13:30,920 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30" (1/1) ... [2023-02-15 18:13:30,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30" (1/1) ... [2023-02-15 18:13:30,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 18:13:30,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 18:13:30,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 18:13:30,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 18:13:30,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30" (1/1) ... [2023-02-15 18:13:30,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:13:30,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:13:30,941 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) [2023-02-15 18:13:30,946 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 [2023-02-15 18:13:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 18:13:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 18:13:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 18:13:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 18:13:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 18:13:30,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 18:13:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 18:13:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 18:13:31,013 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 18:13:31,014 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 18:13:31,115 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 18:13:31,119 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 18:13:31,130 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 18:13:31,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:13:31 BoogieIcfgContainer [2023-02-15 18:13:31,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 18:13:31,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 18:13:31,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 18:13:31,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 18:13:31,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 06:13:30" (1/3) ... [2023-02-15 18:13:31,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2acf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:13:31, skipping insertion in model container [2023-02-15 18:13:31,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:13:30" (2/3) ... [2023-02-15 18:13:31,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2acf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:13:31, skipping insertion in model container [2023-02-15 18:13:31,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:13:31" (3/3) ... [2023-02-15 18:13:31,137 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_02.i [2023-02-15 18:13:31,149 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 18:13:31,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 18:13:31,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 18:13:31,194 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;@68eddaf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 18:13:31,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 18:13:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 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) [2023-02-15 18:13:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 18:13:31,201 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:13:31,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:13:31,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:13:31,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:13:31,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2023-02-15 18:13:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:13:31,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576037444] [2023-02-15 18:13:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:13:31,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:13:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:13:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:13:31,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:13:31,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576037444] [2023-02-15 18:13:31,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576037444] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:13:31,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:13:31,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 18:13:31,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583097784] [2023-02-15 18:13:31,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:13:31,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:13:31,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:13:31,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:13:31,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:13:31,354 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2023-02-15 18:13:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:13:31,394 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2023-02-15 18:13:31,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:13:31,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2023-02-15 18:13:31,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:13:31,401 INFO L225 Difference]: With dead ends: 28 [2023-02-15 18:13:31,401 INFO L226 Difference]: Without dead ends: 12 [2023-02-15 18:13:31,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 18:13:31,411 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:13:31,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:13:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-15 18:13:31,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-15 18:13:31,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2023-02-15 18:13:31,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-15 18:13:31,443 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2023-02-15 18:13:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:13:31,444 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-15 18:13:31,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2023-02-15 18:13:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-15 18:13:31,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 18:13:31,445 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:13:31,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:13:31,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 18:13:31,446 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:13:31,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:13:31,448 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2023-02-15 18:13:31,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:13:31,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962305182] [2023-02-15 18:13:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:13:31,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:13:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:13:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:13:31,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:13:31,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962305182] [2023-02-15 18:13:31,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962305182] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:13:31,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399546141] [2023-02-15 18:13:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:13:31,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:13:31,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:13:31,586 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) [2023-02-15 18:13:31,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 18:13:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:13:31,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 18:13:31,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:13:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 18:13:31,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:13:31,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399546141] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:13:31,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 18:13:31,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-02-15 18:13:31,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270795240] [2023-02-15 18:13:31,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:13:31,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 18:13:31,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:13:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 18:13:31,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 18:13:31,643 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-02-15 18:13:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:13:31,656 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-02-15 18:13:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 18:13:31,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 [2023-02-15 18:13:31,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:13:31,657 INFO L225 Difference]: With dead ends: 24 [2023-02-15 18:13:31,658 INFO L226 Difference]: Without dead ends: 18 [2023-02-15 18:13:31,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 18:13:31,659 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:13:31,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:13:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-15 18:13:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2023-02-15 18:13:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2023-02-15 18:13:31,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-15 18:13:31,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-02-15 18:13:31,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:13:31,669 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-15 18:13:31,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-02-15 18:13:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-15 18:13:31,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 18:13:31,669 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:13:31,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:13:31,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 18:13:31,877 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 [2023-02-15 18:13:31,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:13:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:13:31,878 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2023-02-15 18:13:31,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:13:31,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201264236] [2023-02-15 18:13:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:13:31,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:13:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:13:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 18:13:31,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:13:31,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201264236] [2023-02-15 18:13:31,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201264236] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:13:31,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035297666] [2023-02-15 18:13:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:13:31,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:13:31,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:13:31,934 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) [2023-02-15 18:13:31,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 18:13:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:13:31,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 18:13:31,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:13:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 18:13:31,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:13:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 18:13:32,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035297666] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:13:32,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:13:32,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 18:13:32,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664220829] [2023-02-15 18:13:32,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:13:32,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 18:13:32,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:13:32,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 18:13:32,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:13:32,024 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:13:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:13:32,063 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-02-15 18:13:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 18:13:32,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 18:13:32,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:13:32,064 INFO L225 Difference]: With dead ends: 36 [2023-02-15 18:13:32,064 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 18:13:32,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:13:32,066 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:13:32,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:13:32,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 18:13:32,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2023-02-15 18:13:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-02-15 18:13:32,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-15 18:13:32,075 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2023-02-15 18:13:32,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:13:32,076 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-15 18:13:32,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:13:32,076 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-15 18:13:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 18:13:32,077 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:13:32,078 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:13:32,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 18:13:32,282 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 [2023-02-15 18:13:32,282 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:13:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:13:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 2 times [2023-02-15 18:13:32,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:13:32,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424176214] [2023-02-15 18:13:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:13:32,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:13:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:13:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 18:13:32,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:13:32,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424176214] [2023-02-15 18:13:32,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424176214] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:13:32,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722443256] [2023-02-15 18:13:32,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:13:32,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:13:32,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:13:32,375 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) [2023-02-15 18:13:32,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 18:13:32,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:13:32,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:13:32,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:13:32,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:13:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 18:13:32,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:13:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 18:13:32,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722443256] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:13:32,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:13:32,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 14 [2023-02-15 18:13:32,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105062312] [2023-02-15 18:13:32,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:13:32,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 18:13:32,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:13:32,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 18:13:32,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:13:32,480 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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) [2023-02-15 18:13:32,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:13:32,541 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2023-02-15 18:13:32,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 18:13:32,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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 [2023-02-15 18:13:32,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:13:32,542 INFO L225 Difference]: With dead ends: 64 [2023-02-15 18:13:32,542 INFO L226 Difference]: Without dead ends: 54 [2023-02-15 18:13:32,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:13:32,543 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:13:32,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 36 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:13:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-15 18:13:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 28. [2023-02-15 18:13:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 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) [2023-02-15 18:13:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-02-15 18:13:32,547 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2023-02-15 18:13:32,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:13:32,547 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-02-15 18:13:32,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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) [2023-02-15 18:13:32,547 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-02-15 18:13:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 18:13:32,548 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:13:32,548 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:13:32,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 18:13:32,759 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 [2023-02-15 18:13:32,760 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:13:32,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:13:32,760 INFO L85 PathProgramCache]: Analyzing trace with hash 66221299, now seen corresponding path program 3 times [2023-02-15 18:13:32,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:13:32,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101482299] [2023-02-15 18:13:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:13:32,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:13:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:13:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 18:13:32,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:13:32,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101482299] [2023-02-15 18:13:32,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101482299] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:13:32,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269732741] [2023-02-15 18:13:32,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:13:32,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:13:32,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:13:32,899 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) [2023-02-15 18:13:32,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 18:13:32,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 18:13:32,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:13:32,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:13:32,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:13:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 18:13:32,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:13:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 18:13:33,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269732741] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:13:33,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:13:33,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-15 18:13:33,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340172513] [2023-02-15 18:13:33,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:13:33,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 18:13:33,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:13:33,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 18:13:33,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-15 18:13:33,067 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2023-02-15 18:13:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:13:33,167 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2023-02-15 18:13:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 18:13:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) Word has length 26 [2023-02-15 18:13:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:13:33,169 INFO L225 Difference]: With dead ends: 119 [2023-02-15 18:13:33,169 INFO L226 Difference]: Without dead ends: 105 [2023-02-15 18:13:33,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-15 18:13:33,170 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 112 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:13:33,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 55 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:13:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-15 18:13:33,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 39. [2023-02-15 18:13:33,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 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) [2023-02-15 18:13:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2023-02-15 18:13:33,180 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 26 [2023-02-15 18:13:33,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:13:33,180 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2023-02-15 18:13:33,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2023-02-15 18:13:33,180 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2023-02-15 18:13:33,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 18:13:33,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:13:33,181 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:13:33,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 18:13:33,396 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 [2023-02-15 18:13:33,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:13:33,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:13:33,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1720994616, now seen corresponding path program 4 times [2023-02-15 18:13:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:13:33,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542608322] [2023-02-15 18:13:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:13:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:13:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:13:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-15 18:13:33,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:13:33,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542608322] [2023-02-15 18:13:33,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542608322] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:13:33,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995841952] [2023-02-15 18:13:33,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:13:33,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:13:33,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:13:33,695 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) [2023-02-15 18:13:33,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 18:13:33,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:13:33,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:13:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 18:13:33,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:13:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-15 18:13:33,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:13:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-15 18:13:34,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995841952] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:13:34,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 18:13:34,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2023-02-15 18:13:34,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047165892] [2023-02-15 18:13:34,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 18:13:34,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 18:13:34,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:13:34,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 18:13:34,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=821, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 18:13:34,099 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 41 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 41 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) [2023-02-15 18:13:34,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:13:34,283 INFO L93 Difference]: Finished difference Result 205 states and 241 transitions. [2023-02-15 18:13:34,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 18:13:34,284 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 41 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 37 [2023-02-15 18:13:34,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:13:34,285 INFO L225 Difference]: With dead ends: 205 [2023-02-15 18:13:34,285 INFO L226 Difference]: Without dead ends: 183 [2023-02-15 18:13:34,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=819, Invalid=821, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 18:13:34,286 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 316 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:13:34,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 101 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:13:34,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-02-15 18:13:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 72. [2023-02-15 18:13:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 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) [2023-02-15 18:13:34,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2023-02-15 18:13:34,312 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 37 [2023-02-15 18:13:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:13:34,312 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2023-02-15 18:13:34,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 41 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) [2023-02-15 18:13:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2023-02-15 18:13:34,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 18:13:34,313 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:13:34,313 INFO L195 NwaCegarLoop]: trace histogram [38, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:13:34,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 18:13:34,518 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 [2023-02-15 18:13:34,519 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:13:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:13:34,519 INFO L85 PathProgramCache]: Analyzing trace with hash 550131666, now seen corresponding path program 5 times [2023-02-15 18:13:34,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:13:34,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946817787] [2023-02-15 18:13:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:13:34,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:13:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:13:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2023-02-15 18:13:35,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:13:35,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946817787] [2023-02-15 18:13:35,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946817787] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 18:13:35,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632070109] [2023-02-15 18:13:35,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:13:35,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:13:35,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:13:35,128 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) [2023-02-15 18:13:35,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process