./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/dll-circular-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/forester-heap/dll-circular-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b2cf85bdf3ceca18f859bba09ed8bf6de8160130db2f8571365ac2bc4f0e30c --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 00:53:53,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 00:53:53,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 00:53:53,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 00:53:53,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 00:53:53,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 00:53:53,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 00:53:53,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 00:53:53,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 00:53:53,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 00:53:53,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 00:53:53,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 00:53:53,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 00:53:53,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 00:53:53,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 00:53:53,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 00:53:53,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 00:53:53,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 00:53:53,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 00:53:53,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 00:53:53,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 00:53:53,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 00:53:53,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 00:53:53,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 00:53:53,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 00:53:53,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 00:53:53,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 00:53:53,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 00:53:53,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 00:53:53,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 00:53:53,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 00:53:53,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 00:53:53,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 00:53:53,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 00:53:53,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 00:53:53,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 00:53:53,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 00:53:53,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 00:53:53,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 00:53:53,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 00:53:53,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 00:53:53,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 00:53:53,381 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 00:53:53,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 00:53:53,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 00:53:53,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 00:53:53,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 00:53:53,382 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 00:53:53,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 00:53:53,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 00:53:53,384 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 00:53:53,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 00:53:53,384 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 00:53:53,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 00:53:53,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 00:53:53,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 00:53:53,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 00:53:53,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 00:53:53,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 00:53:53,385 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 00:53:53,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 00:53:53,386 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 00:53:53,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 00:53:53,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 00:53:53,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 00:53:53,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 00:53:53,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:53:53,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 00:53:53,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 00:53:53,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 00:53:53,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 00:53:53,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 00:53:53,387 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 00:53:53,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 00:53:53,388 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 00:53:53,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 00:53:53,388 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 00:53:53,388 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b2cf85bdf3ceca18f859bba09ed8bf6de8160130db2f8571365ac2bc4f0e30c [2023-02-16 00:53:53,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 00:53:53,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 00:53:53,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 00:53:53,570 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 00:53:53,570 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 00:53:53,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-circular-2.i [2023-02-16 00:53:54,522 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 00:53:54,713 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 00:53:54,713 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-circular-2.i [2023-02-16 00:53:54,722 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d291aa91b/e7f6f8e04e1243fba460feb41f78e837/FLAGfa88d4378 [2023-02-16 00:53:54,731 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d291aa91b/e7f6f8e04e1243fba460feb41f78e837 [2023-02-16 00:53:54,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 00:53:54,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 00:53:54,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 00:53:54,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 00:53:54,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 00:53:54,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:53:54" (1/1) ... [2023-02-16 00:53:54,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d86635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:54, skipping insertion in model container [2023-02-16 00:53:54,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:53:54" (1/1) ... [2023-02-16 00:53:54,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 00:53:54,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 00:53:54,936 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/forester-heap/dll-circular-2.i[22391,22404] [2023-02-16 00:53:54,944 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/forester-heap/dll-circular-2.i[22497,22510] [2023-02-16 00:53:54,946 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/forester-heap/dll-circular-2.i[22622,22635] [2023-02-16 00:53:54,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:53:54,961 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 00:53:54,991 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/forester-heap/dll-circular-2.i[22391,22404] [2023-02-16 00:53:54,991 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/forester-heap/dll-circular-2.i[22497,22510] [2023-02-16 00:53:54,995 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/forester-heap/dll-circular-2.i[22622,22635] [2023-02-16 00:53:54,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:53:55,021 INFO L208 MainTranslator]: Completed translation [2023-02-16 00:53:55,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:55 WrapperNode [2023-02-16 00:53:55,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 00:53:55,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 00:53:55,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 00:53:55,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 00:53:55,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:55" (1/1) ... [2023-02-16 00:53:55,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:55" (1/1) ... [2023-02-16 00:53:55,052 INFO L138 Inliner]: procedures = 119, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 117 [2023-02-16 00:53:55,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 00:53:55,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 00:53:55,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 00:53:55,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 00:53:55,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:55" (1/1) ... [2023-02-16 00:53:55,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:55" (1/1) ... [2023-02-16 00:53:55,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:55" (1/1) ... [2023-02-16 00:53:55,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:55" (1/1) ... [2023-02-16 00:53:55,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:55" (1/1) ... [2023-02-16 00:53:55,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:55" (1/1) ... [2023-02-16 00:53:55,077 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:55" (1/1) ... [2023-02-16 00:53:55,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:55" (1/1) ... [2023-02-16 00:53:55,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 00:53:55,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 00:53:55,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 00:53:55,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 00:53:55,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:55" (1/1) ... [2023-02-16 00:53:55,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:53:55,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:53:55,108 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) [2023-02-16 00:53:55,125 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 [2023-02-16 00:53:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 00:53:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 00:53:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 00:53:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 00:53:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-16 00:53:55,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-16 00:53:55,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 00:53:55,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 00:53:55,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 00:53:55,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 00:53:55,227 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 00:53:55,229 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 00:53:55,421 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 00:53:55,426 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 00:53:55,428 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2023-02-16 00:53:55,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:53:55 BoogieIcfgContainer [2023-02-16 00:53:55,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 00:53:55,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 00:53:55,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 00:53:55,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 00:53:55,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 12:53:54" (1/3) ... [2023-02-16 00:53:55,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dae3712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:53:55, skipping insertion in model container [2023-02-16 00:53:55,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:53:55" (2/3) ... [2023-02-16 00:53:55,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dae3712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:53:55, skipping insertion in model container [2023-02-16 00:53:55,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:53:55" (3/3) ... [2023-02-16 00:53:55,438 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-circular-2.i [2023-02-16 00:53:55,451 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 00:53:55,451 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-02-16 00:53:55,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 00:53:55,503 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;@50d08344, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 00:53:55,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-02-16 00:53:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:55,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 00:53:55,510 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:53:55,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 00:53:55,511 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:53:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:53:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash 890892102, now seen corresponding path program 1 times [2023-02-16 00:53:55,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:53:55,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175932072] [2023-02-16 00:53:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:53:55,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:53:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:53:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:53:55,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:53:55,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175932072] [2023-02-16 00:53:55,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175932072] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:53:55,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:53:55,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 00:53:55,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856897563] [2023-02-16 00:53:55,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:53:55,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 00:53:55,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:53:55,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 00:53:55,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:53:55,672 INFO L87 Difference]: Start difference. First operand has 33 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:55,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:53:55,684 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2023-02-16 00:53:55,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 00:53:55,685 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-16 00:53:55,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:53:55,690 INFO L225 Difference]: With dead ends: 64 [2023-02-16 00:53:55,690 INFO L226 Difference]: Without dead ends: 26 [2023-02-16 00:53:55,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:53:55,696 INFO L413 NwaCegarLoop]: 39 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, 39 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 [2023-02-16 00:53:55,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:53:55,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-16 00:53:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-16 00:53:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-16 00:53:55,721 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2023-02-16 00:53:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:53:55,722 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-16 00:53:55,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-16 00:53:55,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 00:53:55,722 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:53:55,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:53:55,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 00:53:55,723 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:53:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:53:55,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1806883023, now seen corresponding path program 1 times [2023-02-16 00:53:55,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:53:55,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774528977] [2023-02-16 00:53:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:53:55,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:53:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:53:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:53:56,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:53:56,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774528977] [2023-02-16 00:53:56,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774528977] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:53:56,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:53:56,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 00:53:56,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572081334] [2023-02-16 00:53:56,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:53:56,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 00:53:56,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:53:56,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 00:53:56,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:53:56,013 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:53:56,079 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2023-02-16 00:53:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 00:53:56,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-16 00:53:56,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:53:56,081 INFO L225 Difference]: With dead ends: 42 [2023-02-16 00:53:56,081 INFO L226 Difference]: Without dead ends: 38 [2023-02-16 00:53:56,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 00:53:56,083 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:53:56,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 47 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:53:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-16 00:53:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2023-02-16 00:53:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-02-16 00:53:56,097 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 7 [2023-02-16 00:53:56,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:53:56,098 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-02-16 00:53:56,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-02-16 00:53:56,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 00:53:56,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:53:56,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:53:56,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 00:53:56,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:53:56,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:53:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash 706691337, now seen corresponding path program 1 times [2023-02-16 00:53:56,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:53:56,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015696295] [2023-02-16 00:53:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:53:56,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:53:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:53:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:53:56,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:53:56,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015696295] [2023-02-16 00:53:56,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015696295] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:53:56,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:53:56,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 00:53:56,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672532745] [2023-02-16 00:53:56,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:53:56,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 00:53:56,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:53:56,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 00:53:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:53:56,184 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:56,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:53:56,214 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2023-02-16 00:53:56,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 00:53:56,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 00:53:56,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:53:56,217 INFO L225 Difference]: With dead ends: 71 [2023-02-16 00:53:56,217 INFO L226 Difference]: Without dead ends: 49 [2023-02-16 00:53:56,219 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 [2023-02-16 00:53:56,221 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 48 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 [2023-02-16 00:53:56,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 48 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:53:56,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-16 00:53:56,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2023-02-16 00:53:56,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.303030303030303) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-02-16 00:53:56,230 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 10 [2023-02-16 00:53:56,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:53:56,230 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-02-16 00:53:56,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:56,230 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-02-16 00:53:56,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 00:53:56,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:53:56,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:53:56,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 00:53:56,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:53:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:53:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash -84804677, now seen corresponding path program 1 times [2023-02-16 00:53:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:53:56,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079613502] [2023-02-16 00:53:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:53:56,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:53:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:53:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:53:56,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:53:56,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079613502] [2023-02-16 00:53:56,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079613502] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:53:56,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:53:56,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 00:53:56,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073892181] [2023-02-16 00:53:56,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:53:56,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 00:53:56,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:53:56,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 00:53:56,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:53:56,282 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:56,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:53:56,299 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-02-16 00:53:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 00:53:56,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-16 00:53:56,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:53:56,300 INFO L225 Difference]: With dead ends: 38 [2023-02-16 00:53:56,300 INFO L226 Difference]: Without dead ends: 36 [2023-02-16 00:53:56,300 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 [2023-02-16 00:53:56,301 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:53:56,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:53:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-16 00:53:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-02-16 00:53:56,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-02-16 00:53:56,304 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 13 [2023-02-16 00:53:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:53:56,304 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-02-16 00:53:56,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-02-16 00:53:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 00:53:56,305 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:53:56,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:53:56,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 00:53:56,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:53:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:53:56,305 INFO L85 PathProgramCache]: Analyzing trace with hash -84802755, now seen corresponding path program 1 times [2023-02-16 00:53:56,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:53:56,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162399448] [2023-02-16 00:53:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:53:56,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:53:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:53:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:53:56,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:53:56,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162399448] [2023-02-16 00:53:56,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162399448] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:53:56,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:53:56,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 00:53:56,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206267861] [2023-02-16 00:53:56,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:53:56,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 00:53:56,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:53:56,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 00:53:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 00:53:56,667 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:53:56,788 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-02-16 00:53:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 00:53:56,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-16 00:53:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:53:56,792 INFO L225 Difference]: With dead ends: 47 [2023-02-16 00:53:56,792 INFO L226 Difference]: Without dead ends: 34 [2023-02-16 00:53:56,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-16 00:53:56,793 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:53:56,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 73 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:53:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-16 00:53:56,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-02-16 00:53:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.28125) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-02-16 00:53:56,801 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 13 [2023-02-16 00:53:56,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:53:56,801 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-02-16 00:53:56,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:56,803 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-02-16 00:53:56,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 00:53:56,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:53:56,804 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:53:56,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 00:53:56,804 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:53:56,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:53:56,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1783178116, now seen corresponding path program 1 times [2023-02-16 00:53:56,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:53:56,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044111590] [2023-02-16 00:53:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:53:56,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:53:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:53:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:53:57,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:53:57,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044111590] [2023-02-16 00:53:57,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044111590] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:53:57,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881161614] [2023-02-16 00:53:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:53:57,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:53:57,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:53:57,193 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) [2023-02-16 00:53:57,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 00:53:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:53:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-16 00:53:57,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:53:57,329 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 6 treesize of output 5 [2023-02-16 00:53:57,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 36 treesize of output 27 [2023-02-16 00:53:57,403 INFO L321 Elim1Store]: treesize reduction 50, result has 9.1 percent of original size [2023-02-16 00:53:57,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 53 [2023-02-16 00:53:57,412 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 5 treesize of output 3 [2023-02-16 00:53:57,422 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-16 00:53:57,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-16 00:53:57,464 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-16 00:53:57,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2023-02-16 00:53:57,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 47 treesize of output 27 [2023-02-16 00:53:57,526 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 18 treesize of output 16 [2023-02-16 00:53:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:53:57,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:53:57,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 00:53:57,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-02-16 00:53:57,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 00:53:57,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 334 treesize of output 225 [2023-02-16 00:53:57,614 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 204 treesize of output 196 [2023-02-16 00:53:57,621 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 196 treesize of output 184 [2023-02-16 00:53:57,626 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 184 treesize of output 180 [2023-02-16 00:53:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:53:57,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881161614] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:53:57,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:53:57,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-02-16 00:53:57,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055629739] [2023-02-16 00:53:57,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:53:57,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 00:53:57,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:53:57,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 00:53:57,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-02-16 00:53:57,770 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:53:57,871 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2023-02-16 00:53:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 00:53:57,871 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-16 00:53:57,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:53:57,874 INFO L225 Difference]: With dead ends: 61 [2023-02-16 00:53:57,874 INFO L226 Difference]: Without dead ends: 59 [2023-02-16 00:53:57,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-02-16 00:53:57,876 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:53:57,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 118 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:53:57,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-16 00:53:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2023-02-16 00:53:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2023-02-16 00:53:57,886 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2023-02-16 00:53:57,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:53:57,887 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2023-02-16 00:53:57,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2023-02-16 00:53:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-16 00:53:57,888 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:53:57,888 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:53:57,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 00:53:58,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-16 00:53:58,100 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:53:58,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:53:58,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1644077251, now seen corresponding path program 1 times [2023-02-16 00:53:58,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:53:58,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796319753] [2023-02-16 00:53:58,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:53:58,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:53:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:53:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:53:58,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:53:58,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796319753] [2023-02-16 00:53:58,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796319753] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:53:58,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:53:58,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 00:53:58,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147062123] [2023-02-16 00:53:58,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:53:58,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 00:53:58,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:53:58,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 00:53:58,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:53:58,148 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:53:58,164 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2023-02-16 00:53:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 00:53:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-16 00:53:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:53:58,165 INFO L225 Difference]: With dead ends: 96 [2023-02-16 00:53:58,165 INFO L226 Difference]: Without dead ends: 73 [2023-02-16 00:53:58,166 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 [2023-02-16 00:53:58,166 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:53:58,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 70 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:53:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-16 00:53:58,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2023-02-16 00:53:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 55 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2023-02-16 00:53:58,180 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 17 [2023-02-16 00:53:58,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:53:58,181 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2023-02-16 00:53:58,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:53:58,181 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2023-02-16 00:53:58,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-16 00:53:58,182 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:53:58,182 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:53:58,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-16 00:53:58,182 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:53:58,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:53:58,183 INFO L85 PathProgramCache]: Analyzing trace with hash 619754034, now seen corresponding path program 1 times [2023-02-16 00:53:58,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:53:58,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154406270] [2023-02-16 00:53:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:53:58,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:53:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:53:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:53:58,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:53:58,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154406270] [2023-02-16 00:53:58,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154406270] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:53:58,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254775480] [2023-02-16 00:53:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:53:58,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:53:58,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:53:58,817 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) [2023-02-16 00:53:58,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 00:53:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:53:58,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-16 00:53:58,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:53:58,930 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 6 treesize of output 5 [2023-02-16 00:53:58,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-02-16 00:53:58,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:53:58,985 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:53:58,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 39 treesize of output 30 [2023-02-16 00:53:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:53:58,994 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2023-02-16 00:53:59,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 52 treesize of output 35 [2023-02-16 00:53:59,024 INFO L321 Elim1Store]: treesize reduction 124, result has 3.9 percent of original size [2023-02-16 00:53:59,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 135 treesize of output 146 [2023-02-16 00:53:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:53:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:53:59,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:53:59,036 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:53:59,036 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 31 treesize of output 28 [2023-02-16 00:53:59,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:53:59,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:53:59,043 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:53:59,044 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 23 treesize of output 22 [2023-02-16 00:53:59,053 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-16 00:53:59,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-16 00:53:59,058 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 8 treesize of output 7 [2023-02-16 00:53:59,061 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 30 treesize of output 28 [2023-02-16 00:53:59,066 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 8 treesize of output 7 [2023-02-16 00:53:59,069 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 12 treesize of output 11 [2023-02-16 00:53:59,090 INFO L321 Elim1Store]: treesize reduction 70, result has 6.7 percent of original size [2023-02-16 00:53:59,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 36 [2023-02-16 00:53:59,096 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 5 treesize of output 3 [2023-02-16 00:53:59,146 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-16 00:53:59,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-02-16 00:53:59,150 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 7 treesize of output 3 [2023-02-16 00:53:59,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:53:59,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:53:59,158 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:53:59,160 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 00:53:59,160 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 1 case distinctions, treesize of input 47 treesize of output 41 [2023-02-16 00:53:59,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-02-16 00:53:59,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:53:59,238 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 00:53:59,238 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 1 case distinctions, treesize of input 99 treesize of output 76 [2023-02-16 00:53:59,245 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 18 treesize of output 20 [2023-02-16 00:53:59,255 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-02-16 00:53:59,256 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 55 [2023-02-16 00:53:59,347 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-02-16 00:53:59,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 61 [2023-02-16 00:53:59,351 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:53:59,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-02-16 00:53:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:53:59,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:53:59,394 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_632 Int) (v_ArrVal_636 (Array Int Int)) (v_ArrVal_633 Int)) (= (let ((.cse4 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base|) .cse4 v_ArrVal_633))) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) .cse4 v_ArrVal_632)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_636) (select (select .cse0 .cse1) .cse2)) (+ (select (select .cse3 .cse1) .cse2) 8))))) 0)) is different from false [2023-02-16 00:53:59,568 INFO L321 Elim1Store]: treesize reduction 43, result has 63.2 percent of original size [2023-02-16 00:53:59,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 2363 treesize of output 1905 [2023-02-16 00:53:59,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 00:53:59,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1896 treesize of output 1320 [2023-02-16 00:53:59,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 00:53:59,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 101604 treesize of output 86470 [2023-02-16 00:54:02,553 INFO L321 Elim1Store]: treesize reduction 44, result has 93.6 percent of original size [2023-02-16 00:54:02,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 2027237 treesize of output 1839087 [2023-02-16 00:54:03,013 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 1678473 treesize of output 1592807 [2023-02-16 00:54:03,757 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 1593427 treesize of output 1453123 [2023-02-16 00:54:05,920 INFO L321 Elim1Store]: treesize reduction 156, result has 79.3 percent of original size [2023-02-16 00:54:05,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 1452571 treesize of output 1395789 [2023-02-16 00:54:07,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 00:54:07,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 7064333 treesize of output 6830443 [2023-02-16 00:54:11,885 INFO L321 Elim1Store]: treesize reduction 52, result has 91.5 percent of original size [2023-02-16 00:54:11,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 14819207 treesize of output 14622429 [2023-02-16 00:54:17,774 INFO L321 Elim1Store]: treesize reduction 52, result has 91.2 percent of original size [2023-02-16 00:54:17,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 14619530 treesize of output 14336590 [2023-02-16 00:54:24,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 00:54:24,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 8972418 treesize of output 8900490 [2023-02-16 00:57:19,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 00:57:19,900 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 1685 treesize of output 1649