./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array6_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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-patterns/array6_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 11:38:35,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 11:38:35,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 11:38:35,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 11:38:35,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 11:38:35,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 11:38:35,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 11:38:35,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 11:38:35,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 11:38:35,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 11:38:35,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 11:38:35,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 11:38:35,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 11:38:35,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 11:38:35,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 11:38:35,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 11:38:35,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 11:38:35,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 11:38:35,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 11:38:35,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 11:38:35,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 11:38:35,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 11:38:35,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 11:38:35,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 11:38:35,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 11:38:35,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 11:38:35,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 11:38:35,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 11:38:35,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 11:38:35,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 11:38:35,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 11:38:35,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 11:38:35,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 11:38:35,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 11:38:35,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 11:38:35,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 11:38:35,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 11:38:35,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 11:38:35,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 11:38:35,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 11:38:35,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 11:38:35,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 11:38:35,492 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 11:38:35,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 11:38:35,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 11:38:35,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 11:38:35,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 11:38:35,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 11:38:35,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 11:38:35,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 11:38:35,495 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 11:38:35,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 11:38:35,495 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 11:38:35,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 11:38:35,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 11:38:35,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 11:38:35,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 11:38:35,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 11:38:35,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 11:38:35,496 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 11:38:35,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 11:38:35,497 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 11:38:35,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 11:38:35,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 11:38:35,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 11:38:35,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 11:38:35,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 11:38:35,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 11:38:35,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 11:38:35,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 11:38:35,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 11:38:35,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 11:38:35,498 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 11:38:35,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 11:38:35,499 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 11:38:35,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 11:38:35,499 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 11:38:35,499 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2023-02-18 11:38:35,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 11:38:35,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 11:38:35,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 11:38:35,686 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 11:38:35,686 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 11:38:35,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array6_pattern.c [2023-02-18 11:38:36,761 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 11:38:36,886 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 11:38:36,886 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array6_pattern.c [2023-02-18 11:38:36,890 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/296b2190a/85e9eea1110c481591356a30d788de22/FLAG4f2300136 [2023-02-18 11:38:36,900 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/296b2190a/85e9eea1110c481591356a30d788de22 [2023-02-18 11:38:36,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 11:38:36,902 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 11:38:36,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 11:38:36,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 11:38:36,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 11:38:36,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 11:38:36" (1/1) ... [2023-02-18 11:38:36,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c129cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:36, skipping insertion in model container [2023-02-18 11:38:36,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 11:38:36" (1/1) ... [2023-02-18 11:38:36,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 11:38:36,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 11:38:37,017 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-patterns/array6_pattern.c[1356,1369] [2023-02-18 11:38:37,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 11:38:37,033 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 11:38:37,040 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-patterns/array6_pattern.c[1356,1369] [2023-02-18 11:38:37,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 11:38:37,054 INFO L208 MainTranslator]: Completed translation [2023-02-18 11:38:37,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:37 WrapperNode [2023-02-18 11:38:37,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 11:38:37,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 11:38:37,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 11:38:37,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 11:38:37,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:37" (1/1) ... [2023-02-18 11:38:37,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:37" (1/1) ... [2023-02-18 11:38:37,075 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-02-18 11:38:37,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 11:38:37,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 11:38:37,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 11:38:37,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 11:38:37,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:37" (1/1) ... [2023-02-18 11:38:37,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:37" (1/1) ... [2023-02-18 11:38:37,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:37" (1/1) ... [2023-02-18 11:38:37,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:37" (1/1) ... [2023-02-18 11:38:37,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:37" (1/1) ... [2023-02-18 11:38:37,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:37" (1/1) ... [2023-02-18 11:38:37,089 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:37" (1/1) ... [2023-02-18 11:38:37,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:37" (1/1) ... [2023-02-18 11:38:37,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 11:38:37,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 11:38:37,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 11:38:37,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 11:38:37,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:37" (1/1) ... [2023-02-18 11:38:37,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 11:38:37,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 11:38:37,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 11:38:37,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 11:38:37,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 11:38:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 11:38:37,137 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 11:38:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 11:38:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 11:38:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 11:38:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 11:38:37,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 11:38:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 11:38:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 11:38:37,185 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 11:38:37,186 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 11:38:37,322 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 11:38:37,326 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 11:38:37,327 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 11:38:37,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 11:38:37 BoogieIcfgContainer [2023-02-18 11:38:37,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 11:38:37,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 11:38:37,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 11:38:37,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 11:38:37,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 11:38:36" (1/3) ... [2023-02-18 11:38:37,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61488ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 11:38:37, skipping insertion in model container [2023-02-18 11:38:37,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:38:37" (2/3) ... [2023-02-18 11:38:37,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61488ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 11:38:37, skipping insertion in model container [2023-02-18 11:38:37,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 11:38:37" (3/3) ... [2023-02-18 11:38:37,348 INFO L112 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2023-02-18 11:38:37,359 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 11:38:37,361 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 11:38:37,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 11:38:37,405 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;@7d2c41d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 11:38:37,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 11:38:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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) [2023-02-18 11:38:37,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 11:38:37,417 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:38:37,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:38:37,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:38:37,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:38:37,421 INFO L85 PathProgramCache]: Analyzing trace with hash -800294020, now seen corresponding path program 1 times [2023-02-18 11:38:37,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:38:37,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829174321] [2023-02-18 11:38:37,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:38:37,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:38:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:38:37,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 11:38:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:38:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 11:38:37,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:38:37,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829174321] [2023-02-18 11:38:37,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829174321] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 11:38:37,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 11:38:37,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 11:38:37,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314381064] [2023-02-18 11:38:37,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 11:38:37,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 11:38:37,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:38:37,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 11:38:37,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 11:38:37,608 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 11:38:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:38:37,625 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2023-02-18 11:38:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 11:38:37,627 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-18 11:38:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:38:37,630 INFO L225 Difference]: With dead ends: 47 [2023-02-18 11:38:37,631 INFO L226 Difference]: Without dead ends: 21 [2023-02-18 11:38:37,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 11:38:37,637 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 11:38:37,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 11:38:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-18 11:38:37,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-18 11:38:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2023-02-18 11:38:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-02-18 11:38:37,661 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2023-02-18 11:38:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:38:37,662 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-02-18 11:38:37,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 11:38:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-02-18 11:38:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 11:38:37,663 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:38:37,663 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:38:37,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 11:38:37,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:38:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:38:37,665 INFO L85 PathProgramCache]: Analyzing trace with hash -952637313, now seen corresponding path program 1 times [2023-02-18 11:38:37,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:38:37,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649584638] [2023-02-18 11:38:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:38:37,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:38:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:38:37,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 11:38:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:38:37,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 11:38:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:38:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 11:38:37,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:38:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649584638] [2023-02-18 11:38:37,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649584638] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 11:38:37,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 11:38:37,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 11:38:37,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851871230] [2023-02-18 11:38:37,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 11:38:37,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 11:38:37,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:38:37,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 11:38:37,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 11:38:37,900 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-02-18 11:38:37,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:38:37,924 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-02-18 11:38:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 11:38:37,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) Word has length 22 [2023-02-18 11:38:37,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:38:37,926 INFO L225 Difference]: With dead ends: 26 [2023-02-18 11:38:37,927 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 11:38:37,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 11:38:37,936 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 11:38:37,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 54 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 11:38:37,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 11:38:37,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-18 11:38:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2023-02-18 11:38:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-02-18 11:38:37,947 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 22 [2023-02-18 11:38:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:38:37,948 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-02-18 11:38:37,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-02-18 11:38:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-02-18 11:38:37,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 11:38:37,949 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:38:37,949 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:38:37,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 11:38:37,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:38:37,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:38:37,950 INFO L85 PathProgramCache]: Analyzing trace with hash -603190335, now seen corresponding path program 1 times [2023-02-18 11:38:37,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:38:37,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156798659] [2023-02-18 11:38:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:38:37,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:38:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:38:38,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 11:38:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:38:38,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 11:38:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:38:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 11:38:38,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:38:38,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156798659] [2023-02-18 11:38:38,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156798659] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 11:38:38,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 11:38:38,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 11:38:38,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156591781] [2023-02-18 11:38:38,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 11:38:38,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 11:38:38,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:38:38,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 11:38:38,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 11:38:38,047 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-02-18 11:38:38,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:38:38,086 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-02-18 11:38:38,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 11:38:38,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) Word has length 24 [2023-02-18 11:38:38,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:38:38,088 INFO L225 Difference]: With dead ends: 41 [2023-02-18 11:38:38,089 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 11:38:38,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 11:38:38,090 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 11:38:38,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 55 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 11:38:38,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 11:38:38,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-02-18 11:38:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2023-02-18 11:38:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-18 11:38:38,097 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 24 [2023-02-18 11:38:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:38:38,097 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-18 11:38:38,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-02-18 11:38:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-18 11:38:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 11:38:38,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:38:38,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:38:38,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 11:38:38,099 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:38:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:38:38,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1366149955, now seen corresponding path program 1 times [2023-02-18 11:38:38,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:38:38,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556652009] [2023-02-18 11:38:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:38:38,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:38:38,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 11:38:38,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919920890] [2023-02-18 11:38:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:38:38,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 11:38:38,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 11:38:38,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 11:38:38,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 11:38:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 11:38:38,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 11:38:38,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 11:38:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 11:38:38,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 11:38:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 11:38:38,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:38:38,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556652009] [2023-02-18 11:38:38,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 11:38:38,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919920890] [2023-02-18 11:38:38,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919920890] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 11:38:38,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 11:38:38,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-18 11:38:38,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445272104] [2023-02-18 11:38:38,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 11:38:38,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 11:38:38,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:38:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 11:38:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-02-18 11:38:38,381 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 11:38:38,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:38:38,513 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2023-02-18 11:38:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 11:38:38,514 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-02-18 11:38:38,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:38:38,517 INFO L225 Difference]: With dead ends: 71 [2023-02-18 11:38:38,517 INFO L226 Difference]: Without dead ends: 43 [2023-02-18 11:38:38,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2023-02-18 11:38:38,518 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 11:38:38,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 76 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 11:38:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-18 11:38:38,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2023-02-18 11:38:38,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2023-02-18 11:38:38,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-18 11:38:38,522 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 26 [2023-02-18 11:38:38,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:38:38,523 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-18 11:38:38,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 11:38:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-18 11:38:38,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 11:38:38,524 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:38:38,524 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:38:38,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 11:38:38,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 11:38:38,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:38:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:38:38,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1559224519, now seen corresponding path program 2 times [2023-02-18 11:38:38,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:38:38,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921066947] [2023-02-18 11:38:38,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:38:38,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:38:38,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 11:38:38,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654144721] [2023-02-18 11:38:38,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 11:38:38,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 11:38:38,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 11:38:38,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 11:38:38,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 11:38:38,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 11:38:38,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 11:38:38,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 11:38:38,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 11:38:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 11:38:38,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 11:38:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 11:38:38,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 11:38:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921066947] [2023-02-18 11:38:38,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 11:38:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654144721] [2023-02-18 11:38:38,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654144721] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 11:38:38,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 11:38:38,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-02-18 11:38:38,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610939649] [2023-02-18 11:38:38,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 11:38:38,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 11:38:38,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 11:38:38,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 11:38:38,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-02-18 11:38:38,859 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 11:38:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 11:38:38,935 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-02-18 11:38:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 11:38:38,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-02-18 11:38:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 11:38:38,937 INFO L225 Difference]: With dead ends: 39 [2023-02-18 11:38:38,937 INFO L226 Difference]: Without dead ends: 35 [2023-02-18 11:38:38,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2023-02-18 11:38:38,940 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 11:38:38,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 105 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 11:38:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-18 11:38:38,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-18 11:38:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 11:38:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-02-18 11:38:38,949 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2023-02-18 11:38:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 11:38:38,950 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-02-18 11:38:38,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 11:38:38,950 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-02-18 11:38:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 11:38:38,950 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 11:38:38,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 11:38:38,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 11:38:39,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 11:38:39,156 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 11:38:39,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 11:38:39,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1722352949, now seen corresponding path program 3 times [2023-02-18 11:38:39,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 11:38:39,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638862873] [2023-02-18 11:38:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 11:38:39,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 11:38:39,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 11:38:39,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770873324] [2023-02-18 11:38:39,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 11:38:39,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 11:38:39,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 11:38:39,176 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 11:38:39,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 11:38:39,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 11:38:39,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 11:38:39,281 WARN L261 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-18 11:38:39,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 11:38:39,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-18 11:38:39,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:38:39,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 37 [2023-02-18 11:38:39,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2023-02-18 11:38:39,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2023-02-18 11:38:39,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:38:39,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 71 [2023-02-18 11:38:39,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:38:39,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 153 [2023-02-18 11:38:39,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 150 [2023-02-18 11:38:39,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 11:38:39,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 147 treesize of output 174 [2023-02-18 11:38:39,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 11:38:39,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 142 [2023-02-18 11:38:43,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:38:43,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:38:43,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:38:43,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:38:43,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:38:43,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:38:43,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:38:43,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:38:43,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:38:43,425 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 11:38:43,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 11:38:43,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 11:38:43,432 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 11:38:43,446 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 11:38:44,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 11:38:44,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 312 select indices, 312 select index equivalence classes, 15 disjoint index pairs (out of 48516 index pairs), introduced 368 new quantified variables, introduced 48635 case distinctions, treesize of input 12063 treesize of output 563154