./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_partition_original_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_partition_original_ground.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 7c423fd522e95226e38270ab4d82928946afe4ab8940cfd611684a61e552aff6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 22:04:29,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 22:04:29,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 22:04:29,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 22:04:29,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 22:04:29,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 22:04:29,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 22:04:29,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 22:04:29,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 22:04:29,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 22:04:29,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 22:04:29,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 22:04:29,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 22:04:29,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 22:04:29,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 22:04:29,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 22:04:29,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 22:04:29,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 22:04:29,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 22:04:29,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 22:04:29,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 22:04:29,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 22:04:29,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 22:04:29,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 22:04:29,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 22:04:29,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 22:04:29,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 22:04:29,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 22:04:29,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 22:04:29,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 22:04:29,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 22:04:29,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 22:04:29,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 22:04:29,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 22:04:29,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 22:04:29,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 22:04:29,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 22:04:29,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 22:04:29,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 22:04:29,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 22:04:29,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 22:04:29,526 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 22:04:29,549 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 22:04:29,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 22:04:29,550 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 22:04:29,550 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 22:04:29,551 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 22:04:29,551 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 22:04:29,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 22:04:29,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 22:04:29,552 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 22:04:29,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 22:04:29,553 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 22:04:29,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 22:04:29,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 22:04:29,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 22:04:29,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 22:04:29,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 22:04:29,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 22:04:29,554 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 22:04:29,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 22:04:29,554 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 22:04:29,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 22:04:29,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 22:04:29,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 22:04:29,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 22:04:29,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:04:29,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 22:04:29,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 22:04:29,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 22:04:29,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 22:04:29,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 22:04:29,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 22:04:29,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 22:04:29,556 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 22:04:29,556 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 22:04:29,556 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 22:04:29,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c423fd522e95226e38270ab4d82928946afe4ab8940cfd611684a61e552aff6 [2023-02-13 22:04:29,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 22:04:29,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 22:04:29,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 22:04:29,754 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 22:04:29,755 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 22:04:29,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2023-02-13 22:04:30,721 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 22:04:30,853 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 22:04:30,854 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2023-02-13 22:04:30,859 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fea08ea7/9657b6e35c884d5285afc4d4517941eb/FLAG5ee01e57e [2023-02-13 22:04:30,871 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fea08ea7/9657b6e35c884d5285afc4d4517941eb [2023-02-13 22:04:30,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 22:04:30,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 22:04:30,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 22:04:30,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 22:04:30,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 22:04:30,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:04:30" (1/1) ... [2023-02-13 22:04:30,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@481153d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:30, skipping insertion in model container [2023-02-13 22:04:30,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:04:30" (1/1) ... [2023-02-13 22:04:30,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 22:04:30,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 22:04:31,007 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_partition_original_ground.i[827,840] [2023-02-13 22:04:31,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:04:31,025 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 22:04:31,033 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_partition_original_ground.i[827,840] [2023-02-13 22:04:31,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:04:31,047 INFO L208 MainTranslator]: Completed translation [2023-02-13 22:04:31,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:31 WrapperNode [2023-02-13 22:04:31,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 22:04:31,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 22:04:31,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 22:04:31,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 22:04:31,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:31" (1/1) ... [2023-02-13 22:04:31,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:31" (1/1) ... [2023-02-13 22:04:31,070 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2023-02-13 22:04:31,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 22:04:31,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 22:04:31,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 22:04:31,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 22:04:31,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:31" (1/1) ... [2023-02-13 22:04:31,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:31" (1/1) ... [2023-02-13 22:04:31,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:31" (1/1) ... [2023-02-13 22:04:31,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:31" (1/1) ... [2023-02-13 22:04:31,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:31" (1/1) ... [2023-02-13 22:04:31,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:31" (1/1) ... [2023-02-13 22:04:31,085 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:31" (1/1) ... [2023-02-13 22:04:31,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:31" (1/1) ... [2023-02-13 22:04:31,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 22:04:31,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 22:04:31,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 22:04:31,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 22:04:31,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:31" (1/1) ... [2023-02-13 22:04:31,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:04:31,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:04:31,108 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) [2023-02-13 22:04:31,114 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 [2023-02-13 22:04:31,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 22:04:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 22:04:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 22:04:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 22:04:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 22:04:31,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 22:04:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 22:04:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-13 22:04:31,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-13 22:04:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 22:04:31,227 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 22:04:31,228 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 22:04:31,391 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 22:04:31,399 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 22:04:31,399 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-13 22:04:31,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:04:31 BoogieIcfgContainer [2023-02-13 22:04:31,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 22:04:31,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 22:04:31,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 22:04:31,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 22:04:31,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 10:04:30" (1/3) ... [2023-02-13 22:04:31,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a817b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:04:31, skipping insertion in model container [2023-02-13 22:04:31,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:04:31" (2/3) ... [2023-02-13 22:04:31,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a817b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:04:31, skipping insertion in model container [2023-02-13 22:04:31,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:04:31" (3/3) ... [2023-02-13 22:04:31,406 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2023-02-13 22:04:31,431 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 22:04:31,431 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 22:04:31,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 22:04:31,489 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;@13c934d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 22:04:31,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 22:04:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:04:31,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-13 22:04:31,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:04:31,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:04:31,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:04:31,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:04:31,500 INFO L85 PathProgramCache]: Analyzing trace with hash -709303782, now seen corresponding path program 1 times [2023-02-13 22:04:31,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:04:31,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496668752] [2023-02-13 22:04:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:04:31,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:04:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:04:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:04:31,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:04:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496668752] [2023-02-13 22:04:31,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496668752] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:04:31,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:04:31,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 22:04:31,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183653462] [2023-02-13 22:04:31,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:04:31,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 22:04:31,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:04:31,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 22:04:31,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 22:04:31,737 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:31,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:04:31,757 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2023-02-13 22:04:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 22:04:31,759 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-13 22:04:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:04:31,773 INFO L225 Difference]: With dead ends: 52 [2023-02-13 22:04:31,773 INFO L226 Difference]: Without dead ends: 25 [2023-02-13 22:04:31,775 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 [2023-02-13 22:04:31,778 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 [2023-02-13 22:04:31,778 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] [2023-02-13 22:04:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-13 22:04:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-13 22:04:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:04:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-02-13 22:04:31,802 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 10 [2023-02-13 22:04:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:04:31,802 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-02-13 22:04:31,802 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-02-13 22:04:31,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-13 22:04:31,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:04:31,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:04:31,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 22:04:31,803 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:04:31,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:04:31,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1757860049, now seen corresponding path program 1 times [2023-02-13 22:04:31,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:04:31,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641329643] [2023-02-13 22:04:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:04:31,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:04:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:04:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 22:04:31,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:04:31,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641329643] [2023-02-13 22:04:31,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641329643] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:04:31,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:04:31,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 22:04:31,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822466266] [2023-02-13 22:04:31,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:04:31,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 22:04:31,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:04:31,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 22:04:31,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 22:04:31,856 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:31,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:04:31,869 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2023-02-13 22:04:31,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 22:04:31,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-13 22:04:31,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:04:31,871 INFO L225 Difference]: With dead ends: 43 [2023-02-13 22:04:31,871 INFO L226 Difference]: Without dead ends: 27 [2023-02-13 22:04:31,871 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 [2023-02-13 22:04:31,872 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:04:31,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 43 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:04:31,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-13 22:04:31,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-02-13 22:04:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:04:31,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-02-13 22:04:31,876 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 12 [2023-02-13 22:04:31,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:04:31,876 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-02-13 22:04:31,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:31,877 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-02-13 22:04:31,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-13 22:04:31,877 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:04:31,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:04:31,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-13 22:04:31,878 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:04:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:04:31,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1154344644, now seen corresponding path program 1 times [2023-02-13 22:04:31,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:04:31,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479649386] [2023-02-13 22:04:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:04:31,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:04:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:04:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 22:04:31,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:04:31,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479649386] [2023-02-13 22:04:31,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479649386] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:04:31,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15320814] [2023-02-13 22:04:31,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:04:31,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:31,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:04:31,987 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) [2023-02-13 22:04:32,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 22:04:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:04:32,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-13 22:04:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:04:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 22:04:32,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:04:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 22:04:32,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15320814] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:04:32,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:04:32,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-13 22:04:32,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035559590] [2023-02-13 22:04:32,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:04:32,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 22:04:32,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:04:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 22:04:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-13 22:04:32,132 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:04:32,154 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2023-02-13 22:04:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 22:04:32,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-13 22:04:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:04:32,155 INFO L225 Difference]: With dead ends: 51 [2023-02-13 22:04:32,155 INFO L226 Difference]: Without dead ends: 31 [2023-02-13 22:04:32,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-13 22:04:32,157 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:04:32,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 122 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:04:32,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-13 22:04:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-13 22:04:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:04:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-02-13 22:04:32,165 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2023-02-13 22:04:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:04:32,166 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-02-13 22:04:32,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-02-13 22:04:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-13 22:04:32,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:04:32,167 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:04:32,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-13 22:04:32,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:32,374 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:04:32,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:04:32,374 INFO L85 PathProgramCache]: Analyzing trace with hash 2107451126, now seen corresponding path program 2 times [2023-02-13 22:04:32,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:04:32,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791378490] [2023-02-13 22:04:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:04:32,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:04:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:04:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-13 22:04:32,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:04:32,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791378490] [2023-02-13 22:04:32,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791378490] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:04:32,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141108178] [2023-02-13 22:04:32,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:04:32,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:32,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:04:32,523 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) [2023-02-13 22:04:32,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 22:04:32,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:04:32,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:04:32,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 22:04:32,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:04:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 22:04:32,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:04:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 22:04:32,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141108178] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:04:32,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:04:32,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-13 22:04:32,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464283231] [2023-02-13 22:04:32,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:04:32,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-13 22:04:32,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:04:32,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-13 22:04:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-13 22:04:32,667 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:04:32,771 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2023-02-13 22:04:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-13 22:04:32,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-13 22:04:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:04:32,772 INFO L225 Difference]: With dead ends: 68 [2023-02-13 22:04:32,772 INFO L226 Difference]: Without dead ends: 48 [2023-02-13 22:04:32,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-02-13 22:04:32,774 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:04:32,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:04:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-13 22:04:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2023-02-13 22:04:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:04:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2023-02-13 22:04:32,779 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 21 [2023-02-13 22:04:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:04:32,779 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2023-02-13 22:04:32,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2023-02-13 22:04:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-13 22:04:32,780 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:04:32,780 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:04:32,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-13 22:04:32,985 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,SelfDestructingSolverStorable3 [2023-02-13 22:04:32,986 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:04:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:04:32,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1706483837, now seen corresponding path program 3 times [2023-02-13 22:04:32,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:04:32,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299496301] [2023-02-13 22:04:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:04:32,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:04:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:04:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 22:04:33,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:04:33,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299496301] [2023-02-13 22:04:33,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299496301] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:04:33,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551038602] [2023-02-13 22:04:33,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:04:33,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:33,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:04:33,227 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) [2023-02-13 22:04:33,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 22:04:33,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-13 22:04:33,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:04:33,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-13 22:04:33,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:04:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-02-13 22:04:33,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:04:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-02-13 22:04:33,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551038602] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:04:33,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:04:33,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-13 22:04:33,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171380873] [2023-02-13 22:04:33,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:04:33,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-13 22:04:33,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:04:33,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-13 22:04:33,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-13 22:04:33,419 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:04:33,560 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2023-02-13 22:04:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-13 22:04:33,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-13 22:04:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:04:33,564 INFO L225 Difference]: With dead ends: 84 [2023-02-13 22:04:33,564 INFO L226 Difference]: Without dead ends: 61 [2023-02-13 22:04:33,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=556, Unknown=0, NotChecked=0, Total=870 [2023-02-13 22:04:33,566 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:04:33,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:04:33,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-13 22:04:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-02-13 22:04:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:04:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-02-13 22:04:33,574 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 36 [2023-02-13 22:04:33,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:04:33,575 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-02-13 22:04:33,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:33,575 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-02-13 22:04:33,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-13 22:04:33,576 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:04:33,576 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:04:33,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 22:04:33,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:33,781 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:04:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:04:33,781 INFO L85 PathProgramCache]: Analyzing trace with hash 917953989, now seen corresponding path program 4 times [2023-02-13 22:04:33,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:04:33,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131902341] [2023-02-13 22:04:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:04:33,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:04:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:04:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-13 22:04:34,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:04:34,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131902341] [2023-02-13 22:04:34,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131902341] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:04:34,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674723375] [2023-02-13 22:04:34,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:04:34,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:34,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:04:34,007 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) [2023-02-13 22:04:34,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 22:04:34,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:04:34,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:04:34,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-13 22:04:34,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:04:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-13 22:04:34,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:04:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-13 22:04:34,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674723375] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:04:34,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:04:34,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-02-13 22:04:34,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788651758] [2023-02-13 22:04:34,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:04:34,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-13 22:04:34,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:04:34,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-13 22:04:34,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-13 22:04:34,358 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:34,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:04:34,436 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2023-02-13 22:04:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-13 22:04:34,437 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-02-13 22:04:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:04:34,439 INFO L225 Difference]: With dead ends: 121 [2023-02-13 22:04:34,439 INFO L226 Difference]: Without dead ends: 86 [2023-02-13 22:04:34,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-13 22:04:34,441 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:04:34,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 170 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:04:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-13 22:04:34,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-02-13 22:04:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 82 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:04:34,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2023-02-13 22:04:34,456 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 50 [2023-02-13 22:04:34,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:04:34,457 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2023-02-13 22:04:34,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:34,458 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2023-02-13 22:04:34,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-13 22:04:34,459 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:04:34,459 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:04:34,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-13 22:04:34,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:34,664 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:04:34,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:04:34,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1581858143, now seen corresponding path program 5 times [2023-02-13 22:04:34,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:04:34,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742274113] [2023-02-13 22:04:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:04:34,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:04:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:04:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-13 22:04:35,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:04:35,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742274113] [2023-02-13 22:04:35,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742274113] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:04:35,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017184720] [2023-02-13 22:04:35,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:04:35,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:35,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:04:35,177 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) [2023-02-13 22:04:35,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 22:04:39,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-02-13 22:04:39,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:04:39,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-13 22:04:39,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:04:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-13 22:04:39,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:04:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-13 22:04:39,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017184720] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:04:39,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:04:39,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-02-13 22:04:39,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636068638] [2023-02-13 22:04:39,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:04:39,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-13 22:04:39,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:04:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-13 22:04:39,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-02-13 22:04:39,998 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:04:40,118 INFO L93 Difference]: Finished difference Result 173 states and 218 transitions. [2023-02-13 22:04:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-13 22:04:40,118 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-02-13 22:04:40,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:04:40,119 INFO L225 Difference]: With dead ends: 173 [2023-02-13 22:04:40,119 INFO L226 Difference]: Without dead ends: 138 [2023-02-13 22:04:40,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-02-13 22:04:40,120 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:04:40,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 122 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:04:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-13 22:04:40,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-02-13 22:04:40,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.0746268656716418) internal successors, (144), 134 states have internal predecessors, (144), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:04:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2023-02-13 22:04:40,128 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 76 [2023-02-13 22:04:40,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:04:40,128 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2023-02-13 22:04:40,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:40,129 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2023-02-13 22:04:40,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-02-13 22:04:40,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:04:40,130 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:04:40,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-13 22:04:40,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:40,339 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:04:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:04:40,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2095671533, now seen corresponding path program 6 times [2023-02-13 22:04:40,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:04:40,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618232518] [2023-02-13 22:04:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:04:40,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:04:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:04:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-13 22:04:41,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:04:41,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618232518] [2023-02-13 22:04:41,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618232518] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:04:41,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268304278] [2023-02-13 22:04:41,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:04:41,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:41,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:04:41,919 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) [2023-02-13 22:04:41,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-13 22:04:42,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-13 22:04:42,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:04:42,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-13 22:04:42,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:04:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2023-02-13 22:04:42,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:04:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2023-02-13 22:04:43,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268304278] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:04:43,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:04:43,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2023-02-13 22:04:43,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486223009] [2023-02-13 22:04:43,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:04:43,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-13 22:04:43,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:04:43,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-13 22:04:43,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2925, Unknown=0, NotChecked=0, Total=4422 [2023-02-13 22:04:43,100 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:04:44,202 INFO L93 Difference]: Finished difference Result 200 states and 236 transitions. [2023-02-13 22:04:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-13 22:04:44,202 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-02-13 22:04:44,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:04:44,203 INFO L225 Difference]: With dead ends: 200 [2023-02-13 22:04:44,203 INFO L226 Difference]: Without dead ends: 165 [2023-02-13 22:04:44,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4914, Invalid=8892, Unknown=0, NotChecked=0, Total=13806 [2023-02-13 22:04:44,207 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:04:44,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 238 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:04:44,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-13 22:04:44,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2023-02-13 22:04:44,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.1125) internal successors, (178), 160 states have internal predecessors, (178), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:04:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 182 transitions. [2023-02-13 22:04:44,214 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 182 transitions. Word has length 128 [2023-02-13 22:04:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:04:44,214 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 182 transitions. [2023-02-13 22:04:44,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:44,215 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 182 transitions. [2023-02-13 22:04:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-02-13 22:04:44,216 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:04:44,216 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:04:44,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-13 22:04:44,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:44,424 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:04:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:04:44,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1928839019, now seen corresponding path program 7 times [2023-02-13 22:04:44,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:04:44,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289071200] [2023-02-13 22:04:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:04:44,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:04:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:04:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-02-13 22:04:45,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:04:45,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289071200] [2023-02-13 22:04:45,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289071200] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:04:45,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265548755] [2023-02-13 22:04:45,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:04:45,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:45,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:04:45,987 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:04:46,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-13 22:04:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:04:46,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-13 22:04:46,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:04:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-02-13 22:04:46,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:04:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-02-13 22:04:48,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265548755] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:04:48,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:04:48,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2023-02-13 22:04:48,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870833095] [2023-02-13 22:04:48,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:04:48,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-02-13 22:04:48,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:04:48,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-02-13 22:04:48,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2023-02-13 22:04:48,697 INFO L87 Difference]: Start difference. First operand 164 states and 182 transitions. Second operand has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:04:48,928 INFO L93 Difference]: Finished difference Result 329 states and 417 transitions. [2023-02-13 22:04:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-02-13 22:04:48,929 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2023-02-13 22:04:48,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:04:48,930 INFO L225 Difference]: With dead ends: 329 [2023-02-13 22:04:48,930 INFO L226 Difference]: Without dead ends: 270 [2023-02-13 22:04:48,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2023-02-13 22:04:48,933 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:04:48,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 170 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:04:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-02-13 22:04:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2023-02-13 22:04:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 266 states have (on average 1.0676691729323309) internal successors, (284), 266 states have internal predecessors, (284), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:04:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 288 transitions. [2023-02-13 22:04:48,941 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 288 transitions. Word has length 154 [2023-02-13 22:04:48,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:04:48,942 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 288 transitions. [2023-02-13 22:04:48,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:04:48,942 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 288 transitions. [2023-02-13 22:04:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-02-13 22:04:48,944 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:04:48,944 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:04:48,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-13 22:04:49,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:49,150 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:04:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:04:49,151 INFO L85 PathProgramCache]: Analyzing trace with hash -464172929, now seen corresponding path program 8 times [2023-02-13 22:04:49,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:04:49,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382316834] [2023-02-13 22:04:49,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:04:49,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:04:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:04:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-02-13 22:04:54,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:04:54,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382316834] [2023-02-13 22:04:54,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382316834] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:04:54,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319361632] [2023-02-13 22:04:54,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:04:54,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:04:54,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:04:54,065 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:04:54,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-13 22:04:54,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:04:54,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:04:54,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 106 conjunts are in the unsatisfiable core [2023-02-13 22:04:54,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:04:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-02-13 22:04:54,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:05:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-02-13 22:05:03,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319361632] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:05:03,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:05:03,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2023-02-13 22:05:03,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376399572] [2023-02-13 22:05:03,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:05:03,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2023-02-13 22:05:03,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:05:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2023-02-13 22:05:03,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2023-02-13 22:05:03,188 INFO L87 Difference]: Start difference. First operand 270 states and 288 transitions. Second operand has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:05:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:05:03,771 INFO L93 Difference]: Finished difference Result 541 states and 682 transitions. [2023-02-13 22:05:03,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2023-02-13 22:05:03,772 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2023-02-13 22:05:03,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:05:03,774 INFO L225 Difference]: With dead ends: 541 [2023-02-13 22:05:03,774 INFO L226 Difference]: Without dead ends: 482 [2023-02-13 22:05:03,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2023-02-13 22:05:03,802 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 22:05:03,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 146 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 22:05:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-02-13 22:05:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2023-02-13 22:05:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 478 states have (on average 1.0376569037656904) internal successors, (496), 478 states have internal predecessors, (496), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:05:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 500 transitions. [2023-02-13 22:05:03,814 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 500 transitions. Word has length 260 [2023-02-13 22:05:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:05:03,814 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 500 transitions. [2023-02-13 22:05:03,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:05:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 500 transitions. [2023-02-13 22:05:03,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2023-02-13 22:05:03,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:05:03,819 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:05:03,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-13 22:05:04,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-13 22:05:04,025 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:05:04,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:05:04,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1485341997, now seen corresponding path program 9 times [2023-02-13 22:05:04,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:05:04,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352787365] [2023-02-13 22:05:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:05:04,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:05:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:05:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-02-13 22:05:21,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:05:21,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352787365] [2023-02-13 22:05:21,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352787365] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:05:21,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899360413] [2023-02-13 22:05:21,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:05:21,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:05:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:05:21,509 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:05:21,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-13 22:05:23,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-13 22:05:23,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:05:23,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-13 22:05:23,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:05:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2023-02-13 22:05:24,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:05:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2023-02-13 22:05:25,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899360413] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:05:25,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:05:25,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 17, 17] total 243 [2023-02-13 22:05:25,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010878464] [2023-02-13 22:05:25,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:05:25,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 243 states [2023-02-13 22:05:25,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:05:25,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2023-02-13 22:05:25,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23073, Invalid=35733, Unknown=0, NotChecked=0, Total=58806 [2023-02-13 22:05:25,514 INFO L87 Difference]: Start difference. First operand 482 states and 500 transitions. Second operand has 243 states, 243 states have (on average 2.1646090534979425) internal successors, (526), 243 states have internal predecessors, (526), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:05:37,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:05:37,225 INFO L93 Difference]: Finished difference Result 592 states and 660 transitions. [2023-02-13 22:05:37,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2023-02-13 22:05:37,226 INFO L78 Accepts]: Start accepts. Automaton has has 243 states, 243 states have (on average 2.1646090534979425) internal successors, (526), 243 states have internal predecessors, (526), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 472 [2023-02-13 22:05:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:05:37,231 INFO L225 Difference]: With dead ends: 592 [2023-02-13 22:05:37,231 INFO L226 Difference]: Without dead ends: 533 [2023-02-13 22:05:37,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1366 GetRequests, 914 SyntacticMatches, 0 SemanticMatches, 452 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28455 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=74346, Invalid=131316, Unknown=0, NotChecked=0, Total=205662 [2023-02-13 22:05:37,262 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 89 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 22:05:37,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 237 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 22:05:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-02-13 22:05:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 532. [2023-02-13 22:05:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 528 states have (on average 1.0643939393939394) internal successors, (562), 528 states have internal predecessors, (562), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:05:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 566 transitions. [2023-02-13 22:05:37,288 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 566 transitions. Word has length 472 [2023-02-13 22:05:37,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:05:37,289 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 566 transitions. [2023-02-13 22:05:37,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 243 states, 243 states have (on average 2.1646090534979425) internal successors, (526), 243 states have internal predecessors, (526), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:05:37,290 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 566 transitions. [2023-02-13 22:05:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-02-13 22:05:37,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:05:37,301 INFO L195 NwaCegarLoop]: trace histogram [211, 211, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:05:37,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-13 22:05:37,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:05:37,501 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:05:37,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:05:37,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1444814123, now seen corresponding path program 10 times [2023-02-13 22:05:37,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:05:37,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134117028] [2023-02-13 22:05:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:05:37,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:05:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:05:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-02-13 22:05:54,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:05:54,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134117028] [2023-02-13 22:05:54,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134117028] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:05:54,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859660974] [2023-02-13 22:05:54,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:05:54,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:05:54,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:05:54,800 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:05:54,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-13 22:06:00,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:06:00,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:06:00,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 213 conjunts are in the unsatisfiable core [2023-02-13 22:06:00,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:06:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-02-13 22:06:00,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:06:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-02-13 22:06:27,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859660974] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:06:27,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:06:27,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2023-02-13 22:06:27,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146864318] [2023-02-13 22:06:27,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:06:27,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 427 states [2023-02-13 22:06:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:06:28,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 427 interpolants. [2023-02-13 22:06:28,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2023-02-13 22:06:28,017 INFO L87 Difference]: Start difference. First operand 532 states and 566 transitions. Second operand has 427 states, 427 states have (on average 2.0163934426229506) internal successors, (861), 427 states have internal predecessors, (861), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:06:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:06:31,342 INFO L93 Difference]: Finished difference Result 1065 states and 1345 transitions. [2023-02-13 22:06:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 426 states. [2023-02-13 22:06:31,343 INFO L78 Accepts]: Start accepts. Automaton has has 427 states, 427 states have (on average 2.0163934426229506) internal successors, (861), 427 states have internal predecessors, (861), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 522 [2023-02-13 22:06:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:06:31,346 INFO L225 Difference]: With dead ends: 1065 [2023-02-13 22:06:31,346 INFO L226 Difference]: Without dead ends: 958 [2023-02-13 22:06:31,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1256 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2023-02-13 22:06:31,353 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-13 22:06:31,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 242 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-13 22:06:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2023-02-13 22:06:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 958. [2023-02-13 22:06:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 954 states have (on average 1.0356394129979036) internal successors, (988), 954 states have internal predecessors, (988), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:06:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 992 transitions. [2023-02-13 22:06:31,372 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 992 transitions. Word has length 522 [2023-02-13 22:06:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:06:31,373 INFO L495 AbstractCegarLoop]: Abstraction has 958 states and 992 transitions. [2023-02-13 22:06:31,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 427 states, 427 states have (on average 2.0163934426229506) internal successors, (861), 427 states have internal predecessors, (861), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:06:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 992 transitions. [2023-02-13 22:06:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 949 [2023-02-13 22:06:31,380 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:06:31,380 INFO L195 NwaCegarLoop]: trace histogram [424, 424, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:06:31,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-13 22:06:31,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-13 22:06:31,590 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:06:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:06:31,591 INFO L85 PathProgramCache]: Analyzing trace with hash 18860031, now seen corresponding path program 11 times [2023-02-13 22:06:31,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:06:31,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968520116] [2023-02-13 22:06:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:06:31,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:06:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:07:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 181111 backedges. 0 proven. 179776 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-02-13 22:07:57,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:07:57,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968520116] [2023-02-13 22:07:57,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968520116] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:07:57,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226655266] [2023-02-13 22:07:57,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:07:57,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:07:57,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:07:57,620 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:07:57,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process