./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4a66002bd28db929747d199b9986ccd34ccce90ecf5386b8e2342838dba13a02 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 18:27:23,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 18:27:23,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 18:27:23,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 18:27:23,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 18:27:23,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 18:27:23,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 18:27:23,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 18:27:23,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 18:27:23,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 18:27:23,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 18:27:23,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 18:27:23,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 18:27:23,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 18:27:23,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 18:27:23,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 18:27:23,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 18:27:23,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 18:27:23,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 18:27:23,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 18:27:23,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 18:27:23,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 18:27:23,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 18:27:23,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 18:27:23,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 18:27:23,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 18:27:23,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 18:27:23,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 18:27:23,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 18:27:23,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 18:27:23,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 18:27:23,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 18:27:23,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 18:27:23,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 18:27:23,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 18:27:23,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 18:27:23,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 18:27:23,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 18:27:23,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 18:27:23,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 18:27:23,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 18:27:23,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 18:27:23,746 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 18:27:23,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 18:27:23,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 18:27:23,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 18:27:23,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 18:27:23,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 18:27:23,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 18:27:23,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 18:27:23,750 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 18:27:23,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 18:27:23,751 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 18:27:23,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 18:27:23,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 18:27:23,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 18:27:23,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 18:27:23,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 18:27:23,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 18:27:23,752 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 18:27:23,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 18:27:23,752 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 18:27:23,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 18:27:23,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 18:27:23,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 18:27:23,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 18:27:23,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 18:27:23,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 18:27:23,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 18:27:23,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 18:27:23,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 18:27:23,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 18:27:23,754 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 18:27:23,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 18:27:23,754 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 18:27:23,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 18:27:23,755 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 18:27:23,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a66002bd28db929747d199b9986ccd34ccce90ecf5386b8e2342838dba13a02 [2023-02-17 18:27:23,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 18:27:23,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 18:27:23,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 18:27:23,979 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 18:27:23,979 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 18:27:23,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i [2023-02-17 18:27:25,031 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 18:27:25,163 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 18:27:25,163 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy4_ground-2.i [2023-02-17 18:27:25,167 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46bbd334e/e12d6fe3eb6c435b81e8a0524480d662/FLAG163e6c509 [2023-02-17 18:27:25,177 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46bbd334e/e12d6fe3eb6c435b81e8a0524480d662 [2023-02-17 18:27:25,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 18:27:25,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 18:27:25,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 18:27:25,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 18:27:25,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 18:27:25,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:27:25" (1/1) ... [2023-02-17 18:27:25,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a7dd44c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25, skipping insertion in model container [2023-02-17 18:27:25,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:27:25" (1/1) ... [2023-02-17 18:27:25,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 18:27:25,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 18:27:25,295 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_copy4_ground-2.i[816,829] [2023-02-17 18:27:25,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 18:27:25,313 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 18:27:25,321 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_copy4_ground-2.i[816,829] [2023-02-17 18:27:25,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 18:27:25,336 INFO L208 MainTranslator]: Completed translation [2023-02-17 18:27:25,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25 WrapperNode [2023-02-17 18:27:25,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 18:27:25,337 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 18:27:25,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 18:27:25,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 18:27:25,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25" (1/1) ... [2023-02-17 18:27:25,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25" (1/1) ... [2023-02-17 18:27:25,369 INFO L138 Inliner]: procedures = 16, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 115 [2023-02-17 18:27:25,370 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 18:27:25,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 18:27:25,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 18:27:25,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 18:27:25,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25" (1/1) ... [2023-02-17 18:27:25,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25" (1/1) ... [2023-02-17 18:27:25,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25" (1/1) ... [2023-02-17 18:27:25,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25" (1/1) ... [2023-02-17 18:27:25,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25" (1/1) ... [2023-02-17 18:27:25,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25" (1/1) ... [2023-02-17 18:27:25,402 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25" (1/1) ... [2023-02-17 18:27:25,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25" (1/1) ... [2023-02-17 18:27:25,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 18:27:25,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 18:27:25,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 18:27:25,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 18:27:25,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25" (1/1) ... [2023-02-17 18:27:25,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 18:27:25,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:27:25,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 18:27:25,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 18:27:25,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 18:27:25,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 18:27:25,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 18:27:25,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 18:27:25,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 18:27:25,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 18:27:25,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 18:27:25,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 18:27:25,566 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 18:27:25,568 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 18:27:25,756 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 18:27:25,760 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 18:27:25,760 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-17 18:27:25,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:27:25 BoogieIcfgContainer [2023-02-17 18:27:25,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 18:27:25,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 18:27:25,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 18:27:25,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 18:27:25,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 06:27:25" (1/3) ... [2023-02-17 18:27:25,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7764ecb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:27:25, skipping insertion in model container [2023-02-17 18:27:25,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:27:25" (2/3) ... [2023-02-17 18:27:25,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7764ecb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:27:25, skipping insertion in model container [2023-02-17 18:27:25,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:27:25" (3/3) ... [2023-02-17 18:27:25,771 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.i [2023-02-17 18:27:25,782 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 18:27:25,783 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 18:27:25,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 18:27:25,819 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;@2ab2ed73, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 18:27:25,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 18:27:25,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 states have internal predecessors, (39), 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) [2023-02-17 18:27:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 18:27:25,827 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:27:25,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:27:25,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:27:25,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:27:25,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1890477095, now seen corresponding path program 1 times [2023-02-17 18:27:25,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:27:25,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522991089] [2023-02-17 18:27:25,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:27:25,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:27:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:27:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 18:27:26,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:27:26,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522991089] [2023-02-17 18:27:26,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522991089] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:27:26,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 18:27:26,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 18:27:26,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424455282] [2023-02-17 18:27:26,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:27:26,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 18:27:26,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:27:26,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 18:27:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 18:27:26,077 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 states have internal predecessors, (39), 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 5.0) internal successors, (15), 3 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) [2023-02-17 18:27:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:27:26,110 INFO L93 Difference]: Finished difference Result 52 states and 76 transitions. [2023-02-17 18:27:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 18:27:26,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 [2023-02-17 18:27:26,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:27:26,117 INFO L225 Difference]: With dead ends: 52 [2023-02-17 18:27:26,117 INFO L226 Difference]: Without dead ends: 25 [2023-02-17 18:27:26,119 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 [2023-02-17 18:27:26,121 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:27:26,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:27:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-17 18:27:26,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-17 18:27:26,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2023-02-17 18:27:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-02-17 18:27:26,142 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2023-02-17 18:27:26,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:27:26,143 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-02-17 18:27:26,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2023-02-17 18:27:26,143 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-02-17 18:27:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 18:27:26,144 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:27:26,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:27:26,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 18:27:26,144 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:27:26,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:27:26,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1812867813, now seen corresponding path program 1 times [2023-02-17 18:27:26,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:27:26,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106286150] [2023-02-17 18:27:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:27:26,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:27:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:27:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 18:27:26,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:27:26,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106286150] [2023-02-17 18:27:26,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106286150] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:27:26,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935007532] [2023-02-17 18:27:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:27:26,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:27:26,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:27:26,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:27:26,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 18:27:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:27:26,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-17 18:27:26,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:27:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 18:27:26,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 18:27:26,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935007532] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:27:26,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 18:27:26,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-17 18:27:26,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416665097] [2023-02-17 18:27:26,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:27:26,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 18:27:26,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:27:26,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 18:27:26,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 18:27:26,405 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2023-02-17 18:27:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:27:26,444 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2023-02-17 18:27:26,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 18:27:26,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 17 [2023-02-17 18:27:26,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:27:26,449 INFO L225 Difference]: With dead ends: 48 [2023-02-17 18:27:26,449 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 18:27:26,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 18:27:26,452 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:27:26,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:27:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 18:27:26,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-02-17 18:27:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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) [2023-02-17 18:27:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-02-17 18:27:26,462 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2023-02-17 18:27:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:27:26,462 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-02-17 18:27:26,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2023-02-17 18:27:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-02-17 18:27:26,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 18:27:26,464 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:27:26,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:27:26,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 18:27:26,668 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 [2023-02-17 18:27:26,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:27:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:27:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2029995939, now seen corresponding path program 1 times [2023-02-17 18:27:26,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:27:26,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197738470] [2023-02-17 18:27:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:27:26,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:27:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:27:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 18:27:26,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:27:26,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197738470] [2023-02-17 18:27:26,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197738470] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:27:26,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049525057] [2023-02-17 18:27:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:27:26,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:27:26,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:27:26,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:27:26,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 18:27:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:27:26,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 18:27:26,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:27:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 18:27:26,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:27:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 18:27:26,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049525057] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:27:26,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:27:26,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-17 18:27:26,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298389801] [2023-02-17 18:27:26,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:27:26,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 18:27:26,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:27:26,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 18:27:26,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-17 18:27:26,870 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2023-02-17 18:27:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:27:26,887 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2023-02-17 18:27:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 18:27:26,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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 25 [2023-02-17 18:27:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:27:26,888 INFO L225 Difference]: With dead ends: 57 [2023-02-17 18:27:26,897 INFO L226 Difference]: Without dead ends: 34 [2023-02-17 18:27:26,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-17 18:27:26,899 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:27:26,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:27:26,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-17 18:27:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-02-17 18:27:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 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) [2023-02-17 18:27:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-02-17 18:27:26,909 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 25 [2023-02-17 18:27:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:27:26,910 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-02-17 18:27:26,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2023-02-17 18:27:26,910 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-02-17 18:27:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 18:27:26,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:27:26,912 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:27:26,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 18:27:27,116 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 [2023-02-17 18:27:27,117 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:27:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:27:27,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1256809879, now seen corresponding path program 2 times [2023-02-17 18:27:27,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:27:27,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380090542] [2023-02-17 18:27:27,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:27:27,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:27:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:27:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-17 18:27:27,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:27:27,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380090542] [2023-02-17 18:27:27,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380090542] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:27:27,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015309927] [2023-02-17 18:27:27,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 18:27:27,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:27:27,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:27:27,215 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:27:27,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 18:27:27,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 18:27:27,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:27:27,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 18:27:27,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:27:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 18:27:27,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:27:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 18:27:27,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015309927] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:27:27,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:27:27,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-17 18:27:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651899501] [2023-02-17 18:27:27,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:27:27,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 18:27:27,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:27:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 18:27:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-17 18:27:27,381 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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) [2023-02-17 18:27:27,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:27:27,469 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2023-02-17 18:27:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 18:27:27,469 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 31 [2023-02-17 18:27:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:27:27,470 INFO L225 Difference]: With dead ends: 81 [2023-02-17 18:27:27,470 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 18:27:27,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-17 18:27:27,472 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:27:27,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 75 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 18:27:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 18:27:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2023-02-17 18:27:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 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) [2023-02-17 18:27:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2023-02-17 18:27:27,486 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 31 [2023-02-17 18:27:27,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:27:27,487 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2023-02-17 18:27:27,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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) [2023-02-17 18:27:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2023-02-17 18:27:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 18:27:27,490 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:27:27,491 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:27:27,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 18:27:27,697 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 [2023-02-17 18:27:27,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:27:27,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:27:27,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2044441341, now seen corresponding path program 3 times [2023-02-17 18:27:27,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:27:27,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837553255] [2023-02-17 18:27:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:27:27,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:27:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:27:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 18:27:27,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:27:27,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837553255] [2023-02-17 18:27:27,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837553255] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:27:27,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642499323] [2023-02-17 18:27:27,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 18:27:27,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:27:27,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:27:27,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:27:27,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 18:27:28,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 18:27:28,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:27:28,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 18:27:28,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:27:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-17 18:27:28,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:27:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-17 18:27:28,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642499323] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:27:28,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:27:28,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-17 18:27:28,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324111064] [2023-02-17 18:27:28,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:27:28,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 18:27:28,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:27:28,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 18:27:28,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-17 18:27:28,139 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 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) [2023-02-17 18:27:28,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:27:28,252 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2023-02-17 18:27:28,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 18:27:28,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 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 51 [2023-02-17 18:27:28,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:27:28,255 INFO L225 Difference]: With dead ends: 120 [2023-02-17 18:27:28,255 INFO L226 Difference]: Without dead ends: 89 [2023-02-17 18:27:28,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-17 18:27:28,256 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:27:28,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 75 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 18:27:28,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-17 18:27:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2023-02-17 18:27:28,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 87 states have internal predecessors, (93), 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) [2023-02-17 18:27:28,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2023-02-17 18:27:28,266 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 51 [2023-02-17 18:27:28,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:27:28,266 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2023-02-17 18:27:28,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 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) [2023-02-17 18:27:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2023-02-17 18:27:28,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-17 18:27:28,267 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:27:28,268 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:27:28,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 18:27:28,472 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 [2023-02-17 18:27:28,473 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:27:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:27:28,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1514226337, now seen corresponding path program 4 times [2023-02-17 18:27:28,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:27:28,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418946694] [2023-02-17 18:27:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:27:28,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:27:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:27:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-17 18:27:28,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:27:28,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418946694] [2023-02-17 18:27:28,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418946694] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:27:28,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936148217] [2023-02-17 18:27:28,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 18:27:28,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:27:28,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:27:28,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:27:28,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 18:27:28,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 18:27:28,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:27:28,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 18:27:28,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:27:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2023-02-17 18:27:28,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:27:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2023-02-17 18:27:29,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936148217] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:27:29,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:27:29,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2023-02-17 18:27:29,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423843079] [2023-02-17 18:27:29,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:27:29,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-17 18:27:29,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:27:29,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-17 18:27:29,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2023-02-17 18:27:29,069 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 28 states have internal predecessors, (85), 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) [2023-02-17 18:27:29,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:27:29,267 INFO L93 Difference]: Finished difference Result 218 states and 260 transitions. [2023-02-17 18:27:29,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-17 18:27:29,268 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 28 states have internal predecessors, (85), 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 85 [2023-02-17 18:27:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:27:29,268 INFO L225 Difference]: With dead ends: 218 [2023-02-17 18:27:29,268 INFO L226 Difference]: Without dead ends: 155 [2023-02-17 18:27:29,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2023-02-17 18:27:29,269 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 108 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 18:27:29,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 102 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 18:27:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-17 18:27:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2023-02-17 18:27:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0392156862745099) internal successors, (159), 153 states have internal predecessors, (159), 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) [2023-02-17 18:27:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 159 transitions. [2023-02-17 18:27:29,276 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 159 transitions. Word has length 85 [2023-02-17 18:27:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:27:29,277 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 159 transitions. [2023-02-17 18:27:29,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 28 states have internal predecessors, (85), 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) [2023-02-17 18:27:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 159 transitions. [2023-02-17 18:27:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-02-17 18:27:29,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:27:29,278 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:27:29,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 18:27:29,483 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 [2023-02-17 18:27:29,484 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:27:29,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:27:29,485 INFO L85 PathProgramCache]: Analyzing trace with hash -44527969, now seen corresponding path program 5 times [2023-02-17 18:27:29,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:27:29,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073763083] [2023-02-17 18:27:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:27:29,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:27:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:27:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2023-02-17 18:27:29,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:27:29,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073763083] [2023-02-17 18:27:29,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073763083] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:27:29,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043129597] [2023-02-17 18:27:29,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 18:27:29,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:27:29,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:27:29,914 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:27:29,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process