./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/sll-buckets-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/sll-buckets-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 57fc1af3da22ce54c30e1aa642eaa8a52bbdae67 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:17:36,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:17:36,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:17:36,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:17:36,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:17:36,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:17:36,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:17:36,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:17:36,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:17:36,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:17:36,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:17:37,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:17:37,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:17:37,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:17:37,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:17:37,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:17:37,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:17:37,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:17:37,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:17:37,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:17:37,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:17:37,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:17:37,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:17:37,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:17:37,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:17:37,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:17:37,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:17:37,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:17:37,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:17:37,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:17:37,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:17:37,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:17:37,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:17:37,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:17:37,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:17:37,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:17:37,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:17:37,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:17:37,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:17:37,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:17:37,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:17:37,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 02:17:37,063 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:17:37,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:17:37,064 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:17:37,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:17:37,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:17:37,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:17:37,066 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:17:37,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:17:37,066 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:17:37,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 02:17:37,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:17:37,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:17:37,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:17:37,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:17:37,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:17:37,068 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:17:37,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:17:37,068 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:17:37,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:17:37,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:17:37,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:17:37,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:17:37,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:17:37,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:17:37,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:17:37,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:17:37,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 02:17:37,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 02:17:37,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:17:37,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:17:37,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57fc1af3da22ce54c30e1aa642eaa8a52bbdae67 [2021-08-26 02:17:37,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:17:37,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:17:37,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:17:37,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:17:37,334 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:17:37,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-08-26 02:17:37,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32dd909bc/c422955f0231416a85b48052ec39861d/FLAG5069c2123 [2021-08-26 02:17:37,721 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:17:37,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-08-26 02:17:37,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32dd909bc/c422955f0231416a85b48052ec39861d/FLAG5069c2123 [2021-08-26 02:17:38,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32dd909bc/c422955f0231416a85b48052ec39861d [2021-08-26 02:17:38,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:17:38,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:17:38,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:17:38,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:17:38,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:17:38,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:17:38" (1/1) ... [2021-08-26 02:17:38,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@170f1165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:17:38, skipping insertion in model container [2021-08-26 02:17:38,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:17:38" (1/1) ... [2021-08-26 02:17:38,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:17:38,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:17:38,371 WARN L228 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/sll-buckets-2.i[22663,22676] [2021-08-26 02:17:38,377 WARN L228 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/sll-buckets-2.i[22734,22747] [2021-08-26 02:17:38,378 WARN L228 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/sll-buckets-2.i[22862,22875] [2021-08-26 02:17:38,381 WARN L228 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/sll-buckets-2.i[23275,23288] [2021-08-26 02:17:38,381 WARN L228 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/sll-buckets-2.i[23364,23377] [2021-08-26 02:17:38,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:17:38,392 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:17:38,424 WARN L228 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/sll-buckets-2.i[22663,22676] [2021-08-26 02:17:38,433 WARN L228 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/sll-buckets-2.i[22734,22747] [2021-08-26 02:17:38,437 WARN L228 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/sll-buckets-2.i[22862,22875] [2021-08-26 02:17:38,439 WARN L228 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/sll-buckets-2.i[23275,23288] [2021-08-26 02:17:38,445 WARN L228 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/sll-buckets-2.i[23364,23377] [2021-08-26 02:17:38,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:17:38,466 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:17:38,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:17:38 WrapperNode [2021-08-26 02:17:38,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:17:38,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:17:38,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:17:38,470 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:17:38,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:17:38" (1/1) ... [2021-08-26 02:17:38,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:17:38" (1/1) ... [2021-08-26 02:17:38,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:17:38,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:17:38,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:17:38,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:17:38,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:17:38" (1/1) ... [2021-08-26 02:17:38,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:17:38" (1/1) ... [2021-08-26 02:17:38,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:17:38" (1/1) ... [2021-08-26 02:17:38,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:17:38" (1/1) ... [2021-08-26 02:17:38,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:17:38" (1/1) ... [2021-08-26 02:17:38,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:17:38" (1/1) ... [2021-08-26 02:17:38,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:17:38" (1/1) ... [2021-08-26 02:17:38,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:17:38,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:17:38,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:17:38,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:17:38,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:17:38" (1/1) ... [2021-08-26 02:17:38,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:17:38,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:17:38,548 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) [2021-08-26 02:17:38,554 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 [2021-08-26 02:17:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 02:17:38,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 02:17:38,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:17:38,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:17:38,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:17:38,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:17:38,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:17:38,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 02:17:38,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:17:38,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:17:38,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:17:38,998 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-08-26 02:17:38,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:17:38 BoogieIcfgContainer [2021-08-26 02:17:38,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:17:39,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:17:39,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:17:39,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:17:39,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:17:38" (1/3) ... [2021-08-26 02:17:39,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea37ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:17:39, skipping insertion in model container [2021-08-26 02:17:39,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:17:38" (2/3) ... [2021-08-26 02:17:39,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea37ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:17:39, skipping insertion in model container [2021-08-26 02:17:39,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:17:38" (3/3) ... [2021-08-26 02:17:39,005 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-buckets-2.i [2021-08-26 02:17:39,008 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:17:39,009 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-08-26 02:17:39,039 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:17:39,043 INFO L339 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, mConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 02:17:39,044 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-26 02:17:39,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 38 states have (on average 1.868421052631579) internal successors, (71), 43 states have internal predecessors, (71), 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) [2021-08-26 02:17:39,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 02:17:39,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:17:39,057 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:17:39,057 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 02:17:39,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:17:39,061 INFO L82 PathProgramCache]: Analyzing trace with hash 179510098, now seen corresponding path program 1 times [2021-08-26 02:17:39,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:17:39,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585863987] [2021-08-26 02:17:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:39,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:17:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:39,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:17:39,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585863987] [2021-08-26 02:17:39,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585863987] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:17:39,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:17:39,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 02:17:39,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819837422] [2021-08-26 02:17:39,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:17:39,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:17:39,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:17:39,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:17:39,270 INFO L87 Difference]: Start difference. First operand has 44 states, 38 states have (on average 1.868421052631579) internal successors, (71), 43 states have internal predecessors, (71), 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 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-26 02:17:39,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:17:39,325 INFO L93 Difference]: Finished difference Result 112 states and 188 transitions. [2021-08-26 02:17:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:17:39,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-08-26 02:17:39,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:17:39,332 INFO L225 Difference]: With dead ends: 112 [2021-08-26 02:17:39,332 INFO L226 Difference]: Without dead ends: 66 [2021-08-26 02:17:39,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:17:39,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-26 02:17:39,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2021-08-26 02:17:39,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:17:39,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-08-26 02:17:39,359 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 8 [2021-08-26 02:17:39,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:17:39,359 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-08-26 02:17:39,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-26 02:17:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-08-26 02:17:39,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 02:17:39,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:17:39,360 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:17:39,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 02:17:39,361 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 02:17:39,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:17:39,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1306111283, now seen corresponding path program 1 times [2021-08-26 02:17:39,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:17:39,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910644351] [2021-08-26 02:17:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:39,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:17:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:39,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:17:39,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910644351] [2021-08-26 02:17:39,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910644351] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:17:39,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:17:39,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 02:17:39,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840932531] [2021-08-26 02:17:39,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:17:39,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:17:39,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:17:39,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:17:39,429 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:17:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:17:39,461 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-08-26 02:17:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:17:39,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-26 02:17:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:17:39,463 INFO L225 Difference]: With dead ends: 45 [2021-08-26 02:17:39,464 INFO L226 Difference]: Without dead ends: 43 [2021-08-26 02:17:39,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:17:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-26 02:17:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2021-08-26 02:17:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 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) [2021-08-26 02:17:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-08-26 02:17:39,472 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 9 [2021-08-26 02:17:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:17:39,473 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-08-26 02:17:39,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:17:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-08-26 02:17:39,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 02:17:39,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:17:39,475 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:17:39,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 02:17:39,489 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 02:17:39,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:17:39,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1834780084, now seen corresponding path program 1 times [2021-08-26 02:17:39,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:17:39,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505509080] [2021-08-26 02:17:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:39,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:17:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:39,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:17:39,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505509080] [2021-08-26 02:17:39,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505509080] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:17:39,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:17:39,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:17:39,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301937876] [2021-08-26 02:17:39,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:17:39,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:17:39,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:17:39,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:17:39,674 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-08-26 02:17:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:17:39,807 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-08-26 02:17:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:17:39,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2021-08-26 02:17:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:17:39,810 INFO L225 Difference]: With dead ends: 60 [2021-08-26 02:17:39,811 INFO L226 Difference]: Without dead ends: 49 [2021-08-26 02:17:39,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:17:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-26 02:17:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-08-26 02:17:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 43 states have internal predecessors, (53), 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) [2021-08-26 02:17:39,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-08-26 02:17:39,822 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 10 [2021-08-26 02:17:39,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:17:39,822 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-08-26 02:17:39,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-08-26 02:17:39,823 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-08-26 02:17:39,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 02:17:39,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:17:39,823 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:17:39,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 02:17:39,824 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 02:17:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:17:39,825 INFO L82 PathProgramCache]: Analyzing trace with hash 710639734, now seen corresponding path program 1 times [2021-08-26 02:17:39,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:17:39,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463465539] [2021-08-26 02:17:39,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:39,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:17:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:39,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:17:39,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463465539] [2021-08-26 02:17:39,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463465539] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:17:39,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:17:39,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 02:17:39,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394858437] [2021-08-26 02:17:39,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:17:39,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:17:39,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:17:39,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:17:39,858 INFO L87 Difference]: Start difference. First operand 44 states and 53 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) [2021-08-26 02:17:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:17:39,912 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-08-26 02:17:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:17:39,912 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 [2021-08-26 02:17:39,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:17:39,913 INFO L225 Difference]: With dead ends: 45 [2021-08-26 02:17:39,913 INFO L226 Difference]: Without dead ends: 43 [2021-08-26 02:17:39,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:17:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-26 02:17:39,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-08-26 02:17:39,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.275) internal successors, (51), 41 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) [2021-08-26 02:17:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-08-26 02:17:39,916 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 10 [2021-08-26 02:17:39,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:17:39,916 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-08-26 02:17:39,916 INFO L471 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) [2021-08-26 02:17:39,916 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-08-26 02:17:39,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 02:17:39,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:17:39,916 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:17:39,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 02:17:39,917 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 02:17:39,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:17:39,917 INFO L82 PathProgramCache]: Analyzing trace with hash 625501225, now seen corresponding path program 1 times [2021-08-26 02:17:39,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:17:39,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530240350] [2021-08-26 02:17:39,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:39,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:17:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:40,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:17:40,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530240350] [2021-08-26 02:17:40,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530240350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:17:40,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490739161] [2021-08-26 02:17:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:40,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:17:40,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:17:40,105 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) [2021-08-26 02:17:40,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 02:17:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:40,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-26 02:17:40,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:17:40,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:40,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:40,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 191 [2021-08-26 02:17:40,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:40,516 INFO L354 Elim1Store]: treesize reduction 194, result has 13.8 percent of original size [2021-08-26 02:17:40,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 236 treesize of output 170 [2021-08-26 02:17:40,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:40,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:40,770 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-08-26 02:17:40,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 254 treesize of output 176 [2021-08-26 02:17:40,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:40,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:40,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:41,002 INFO L354 Elim1Store]: treesize reduction 1283, result has 6.1 percent of original size [2021-08-26 02:17:41,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 221 treesize of output 186 [2021-08-26 02:17:41,019 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-26 02:17:41,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 181 treesize of output 165 [2021-08-26 02:17:41,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:41,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:41,421 INFO L354 Elim1Store]: treesize reduction 212, result has 10.2 percent of original size [2021-08-26 02:17:41,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 177 treesize of output 132 [2021-08-26 02:17:41,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:41,470 INFO L354 Elim1Store]: treesize reduction 360, result has 10.9 percent of original size [2021-08-26 02:17:41,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 164 treesize of output 169 [2021-08-26 02:17:41,823 INFO L354 Elim1Store]: treesize reduction 225, result has 3.4 percent of original size [2021-08-26 02:17:41,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 181 treesize of output 94 [2021-08-26 02:17:41,861 INFO L354 Elim1Store]: treesize reduction 194, result has 1.5 percent of original size [2021-08-26 02:17:41,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 45 [2021-08-26 02:17:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:41,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490739161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:17:41,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:17:41,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-26 02:17:41,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495627421] [2021-08-26 02:17:41,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 02:17:41,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:17:41,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 02:17:41,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:17:41,895 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:17:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:17:46,325 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2021-08-26 02:17:46,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 02:17:46,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 02:17:46,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:17:46,326 INFO L225 Difference]: With dead ends: 75 [2021-08-26 02:17:46,327 INFO L226 Difference]: Without dead ends: 64 [2021-08-26 02:17:46,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-08-26 02:17:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-26 02:17:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2021-08-26 02:17:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 46 states have internal predecessors, (56), 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) [2021-08-26 02:17:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-08-26 02:17:46,331 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2021-08-26 02:17:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:17:46,331 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-08-26 02:17:46,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:17:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-08-26 02:17:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 02:17:46,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:17:46,332 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:17:46,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 02:17:46,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:17:46,545 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 02:17:46,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:17:46,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1157082046, now seen corresponding path program 1 times [2021-08-26 02:17:46,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:17:46,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85563152] [2021-08-26 02:17:46,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:46,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:17:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:46,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:17:46,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85563152] [2021-08-26 02:17:46,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85563152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:17:46,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859088348] [2021-08-26 02:17:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:46,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:17:46,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:17:46,657 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) [2021-08-26 02:17:46,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 02:17:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:46,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 02:17:46,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:17:46,853 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-08-26 02:17:46,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 137 treesize of output 136 [2021-08-26 02:17:46,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:46,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:46,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 105 [2021-08-26 02:17:46,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:46,907 INFO L354 Elim1Store]: treesize reduction 194, result has 13.8 percent of original size [2021-08-26 02:17:46,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 130 treesize of output 84 [2021-08-26 02:17:46,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:46,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:46,980 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-08-26 02:17:46,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 124 treesize of output 90 [2021-08-26 02:17:47,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:47,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:47,175 INFO L354 Elim1Store]: treesize reduction 290, result has 13.9 percent of original size [2021-08-26 02:17:47,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 104 [2021-08-26 02:17:47,196 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-26 02:17:47,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 132 [2021-08-26 02:17:47,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:47,385 INFO L354 Elim1Store]: treesize reduction 452, result has 10.7 percent of original size [2021-08-26 02:17:47,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 99 [2021-08-26 02:17:47,844 INFO L354 Elim1Store]: treesize reduction 201, result has 2.0 percent of original size [2021-08-26 02:17:47,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 53 [2021-08-26 02:17:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:47,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859088348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:17:47,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:17:47,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-26 02:17:47,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127531191] [2021-08-26 02:17:47,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 02:17:47,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:17:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 02:17:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-26 02:17:47,859 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:17:50,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:17:50,714 INFO L93 Difference]: Finished difference Result 155 states and 194 transitions. [2021-08-26 02:17:50,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 02:17:50,715 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 02:17:50,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:17:50,716 INFO L225 Difference]: With dead ends: 155 [2021-08-26 02:17:50,716 INFO L226 Difference]: Without dead ends: 153 [2021-08-26 02:17:50,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 517.7ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-08-26 02:17:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-26 02:17:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 71. [2021-08-26 02:17:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 70 states have internal predecessors, (88), 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) [2021-08-26 02:17:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-08-26 02:17:50,723 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 16 [2021-08-26 02:17:50,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:17:50,723 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-08-26 02:17:50,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:17:50,723 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-08-26 02:17:50,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 02:17:50,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:17:50,724 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:17:50,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 02:17:50,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-26 02:17:50,943 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 02:17:50,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:17:50,943 INFO L82 PathProgramCache]: Analyzing trace with hash 442135079, now seen corresponding path program 2 times [2021-08-26 02:17:50,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:17:50,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061017352] [2021-08-26 02:17:50,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:50,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:17:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:51,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:17:51,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061017352] [2021-08-26 02:17:51,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061017352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:17:51,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681268063] [2021-08-26 02:17:51,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:17:51,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:17:51,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:17:51,062 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:17:51,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 02:17:51,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:17:51,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:17:51,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-26 02:17:51,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:17:51,423 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-08-26 02:17:51,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 146 treesize of output 145 [2021-08-26 02:17:51,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:51,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 124 [2021-08-26 02:17:51,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:51,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:51,461 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-08-26 02:17:51,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 108 [2021-08-26 02:17:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:51,557 INFO L354 Elim1Store]: treesize reduction 429, result has 8.9 percent of original size [2021-08-26 02:17:51,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 85 treesize of output 75 [2021-08-26 02:17:51,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:51,766 INFO L354 Elim1Store]: treesize reduction 134, result has 16.3 percent of original size [2021-08-26 02:17:51,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 63 [2021-08-26 02:17:51,787 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-08-26 02:17:51,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 58 [2021-08-26 02:17:51,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:51,886 INFO L354 Elim1Store]: treesize reduction 100, result has 14.5 percent of original size [2021-08-26 02:17:51,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 60 [2021-08-26 02:17:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:17:52,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681268063] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:17:52,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 02:17:52,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-08-26 02:17:52,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828364874] [2021-08-26 02:17:52,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 02:17:52,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:17:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 02:17:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-26 02:17:52,388 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-08-26 02:17:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:17:55,121 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2021-08-26 02:17:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 02:17:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 18 [2021-08-26 02:17:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:17:55,122 INFO L225 Difference]: With dead ends: 137 [2021-08-26 02:17:55,122 INFO L226 Difference]: Without dead ends: 102 [2021-08-26 02:17:55,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-26 02:17:55,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-26 02:17:55,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2021-08-26 02:17:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 76 states have (on average 1.25) internal successors, (95), 77 states have internal predecessors, (95), 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) [2021-08-26 02:17:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2021-08-26 02:17:55,128 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 18 [2021-08-26 02:17:55,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:17:55,129 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2021-08-26 02:17:55,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-08-26 02:17:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2021-08-26 02:17:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 02:17:55,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:17:55,130 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:17:55,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 02:17:55,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:17:55,337 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 02:17:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:17:55,337 INFO L82 PathProgramCache]: Analyzing trace with hash -482453053, now seen corresponding path program 1 times [2021-08-26 02:17:55,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:17:55,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477285551] [2021-08-26 02:17:55,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:55,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:17:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:55,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:17:55,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477285551] [2021-08-26 02:17:55,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477285551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:17:55,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148054399] [2021-08-26 02:17:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:17:55,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:17:55,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:17:55,462 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:17:55,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 02:17:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:17:55,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-26 02:17:55,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:17:55,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:55,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:55,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:55,998 INFO L354 Elim1Store]: treesize reduction 228, result has 14.3 percent of original size [2021-08-26 02:17:55,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 249 treesize of output 187 [2021-08-26 02:17:56,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:56,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:56,219 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-08-26 02:17:56,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 290 treesize of output 192 [2021-08-26 02:17:56,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:56,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:56,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:56,399 INFO L354 Elim1Store]: treesize reduction 1283, result has 6.1 percent of original size [2021-08-26 02:17:56,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 257 treesize of output 222 [2021-08-26 02:17:56,423 INFO L354 Elim1Store]: treesize reduction 124, result has 10.8 percent of original size [2021-08-26 02:17:56,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 217 treesize of output 204 [2021-08-26 02:17:56,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:56,674 INFO L354 Elim1Store]: treesize reduction 290, result has 13.9 percent of original size [2021-08-26 02:17:56,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 217 treesize of output 161 [2021-08-26 02:17:56,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:56,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:56,750 INFO L354 Elim1Store]: treesize reduction 450, result has 13.6 percent of original size [2021-08-26 02:17:56,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 213 treesize of output 227 [2021-08-26 02:17:56,780 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-26 02:17:56,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 209 treesize of output 213 [2021-08-26 02:17:56,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:56,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:57,056 INFO L354 Elim1Store]: treesize reduction 452, result has 10.7 percent of original size [2021-08-26 02:17:57,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 239 treesize of output 171 [2021-08-26 02:17:57,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:17:57,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:17:57,147 INFO L354 Elim1Store]: treesize reduction 636, result has 10.9 percent of original size [2021-08-26 02:17:57,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 220 treesize of output 222 [2021-08-26 02:17:57,830 INFO L354 Elim1Store]: treesize reduction 316, result has 0.3 percent of original size [2021-08-26 02:17:57,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 211 treesize of output 153 [2021-08-26 02:17:58,078 INFO L354 Elim1Store]: treesize reduction 201, result has 2.0 percent of original size [2021-08-26 02:17:58,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 133 treesize of output 53 [2021-08-26 02:17:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:17:58,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148054399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:17:58,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:17:58,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-26 02:17:58,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314175552] [2021-08-26 02:17:58,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 02:17:58,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:17:58,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 02:17:58,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-26 02:17:58,094 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2021-08-26 02:18:01,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:18:01,613 INFO L93 Difference]: Finished difference Result 176 states and 224 transitions. [2021-08-26 02:18:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 02:18:01,614 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 19 [2021-08-26 02:18:01,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:18:01,614 INFO L225 Difference]: With dead ends: 176 [2021-08-26 02:18:01,615 INFO L226 Difference]: Without dead ends: 174 [2021-08-26 02:18:01,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 996.1ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-08-26 02:18:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-26 02:18:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 99. [2021-08-26 02:18:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.2783505154639174) internal successors, (124), 98 states have internal predecessors, (124), 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) [2021-08-26 02:18:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2021-08-26 02:18:01,621 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 19 [2021-08-26 02:18:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:18:01,621 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2021-08-26 02:18:01,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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) [2021-08-26 02:18:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2021-08-26 02:18:01,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 02:18:01,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:18:01,625 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:18:01,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 02:18:01,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:18:01,833 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 02:18:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:18:01,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1136543444, now seen corresponding path program 2 times [2021-08-26 02:18:01,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:18:01,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343893121] [2021-08-26 02:18:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:18:01,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:18:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:18:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:18:02,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:18:02,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343893121] [2021-08-26 02:18:02,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343893121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:18:02,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064572186] [2021-08-26 02:18:02,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:18:02,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:18:02,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:18:02,073 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:18:02,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 02:18:02,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:18:02,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:18:02,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-26 02:18:02,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:18:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:02,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:02,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 179 [2021-08-26 02:18:02,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:02,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:02,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 154 [2021-08-26 02:18:02,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:02,496 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-08-26 02:18:02,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 137 [2021-08-26 02:18:02,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:02,539 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-08-26 02:18:02,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 209 treesize of output 143 [2021-08-26 02:18:02,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:02,581 INFO L354 Elim1Store]: treesize reduction 224, result has 14.8 percent of original size [2021-08-26 02:18:02,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 173 treesize of output 175 [2021-08-26 02:18:02,587 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-26 02:18:02,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 177 treesize of output 161 [2021-08-26 02:18:02,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:02,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:02,876 INFO L354 Elim1Store]: treesize reduction 164, result has 14.1 percent of original size [2021-08-26 02:18:02,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 173 treesize of output 178 [2021-08-26 02:18:02,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:02,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:02,900 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-08-26 02:18:02,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 17 case distinctions, treesize of input 160 treesize of output 115 [2021-08-26 02:18:03,222 INFO L354 Elim1Store]: treesize reduction 347, result has 13.9 percent of original size [2021-08-26 02:18:03,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 183 treesize of output 182 [2021-08-26 02:18:03,292 INFO L354 Elim1Store]: treesize reduction 223, result has 13.9 percent of original size [2021-08-26 02:18:03,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 168 treesize of output 125 [2021-08-26 02:18:03,678 INFO L354 Elim1Store]: treesize reduction 288, result has 6.2 percent of original size [2021-08-26 02:18:03,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 125 [2021-08-26 02:18:03,718 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-26 02:18:03,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 60 [2021-08-26 02:18:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:18:03,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064572186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:18:03,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:18:03,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-26 02:18:03,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642712638] [2021-08-26 02:18:03,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 02:18:03,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:18:03,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 02:18:03,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-26 02:18:03,749 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2021-08-26 02:18:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:18:15,310 INFO L93 Difference]: Finished difference Result 130 states and 158 transitions. [2021-08-26 02:18:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 02:18:15,311 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 20 [2021-08-26 02:18:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:18:15,311 INFO L225 Difference]: With dead ends: 130 [2021-08-26 02:18:15,311 INFO L226 Difference]: Without dead ends: 119 [2021-08-26 02:18:15,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 485.9ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-26 02:18:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-26 02:18:15,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2021-08-26 02:18:15,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.2647058823529411) internal successors, (129), 103 states have internal predecessors, (129), 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) [2021-08-26 02:18:15,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2021-08-26 02:18:15,320 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 20 [2021-08-26 02:18:15,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:18:15,320 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2021-08-26 02:18:15,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2021-08-26 02:18:15,320 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2021-08-26 02:18:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 02:18:15,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:18:15,321 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:18:15,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 02:18:15,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:18:15,537 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 02:18:15,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:18:15,537 INFO L82 PathProgramCache]: Analyzing trace with hash 220535656, now seen corresponding path program 2 times [2021-08-26 02:18:15,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:18:15,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744348940] [2021-08-26 02:18:15,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:18:15,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:18:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:18:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:18:15,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:18:15,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744348940] [2021-08-26 02:18:15,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744348940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:18:15,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713756288] [2021-08-26 02:18:15,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:18:15,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:18:15,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:18:15,683 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:18:15,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 02:18:16,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:18:16,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:18:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-26 02:18:16,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:18:16,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:16,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:16,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 257 [2021-08-26 02:18:16,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:16,258 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-08-26 02:18:16,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 240 [2021-08-26 02:18:16,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:16,363 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-08-26 02:18:16,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 408 treesize of output 246 [2021-08-26 02:18:16,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:16,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:16,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 408 treesize of output 371 [2021-08-26 02:18:16,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:16,394 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-08-26 02:18:16,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 371 treesize of output 322 [2021-08-26 02:18:16,420 INFO L354 Elim1Store]: treesize reduction 100, result has 18.7 percent of original size [2021-08-26 02:18:16,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 303 treesize of output 265 [2021-08-26 02:18:16,446 INFO L354 Elim1Store]: treesize reduction 124, result has 10.8 percent of original size [2021-08-26 02:18:16,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 266 treesize of output 253 [2021-08-26 02:18:16,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:16,479 INFO L354 Elim1Store]: treesize reduction 178, result has 18.0 percent of original size [2021-08-26 02:18:16,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 247 treesize of output 259 [2021-08-26 02:18:16,485 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-26 02:18:16,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 247 treesize of output 214 [2021-08-26 02:18:16,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:16,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:16,739 INFO L354 Elim1Store]: treesize reduction 198, result has 18.5 percent of original size [2021-08-26 02:18:16,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 226 treesize of output 178 [2021-08-26 02:18:16,772 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-26 02:18:16,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 226 [2021-08-26 02:18:16,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:16,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:16,828 INFO L354 Elim1Store]: treesize reduction 318, result has 17.8 percent of original size [2021-08-26 02:18:16,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 214 treesize of output 228 [2021-08-26 02:18:16,845 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-08-26 02:18:16,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 201 [2021-08-26 02:18:17,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:17,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:17,095 INFO L354 Elim1Store]: treesize reduction 258, result has 12.2 percent of original size [2021-08-26 02:18:17,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 242 treesize of output 182 [2021-08-26 02:18:17,114 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-08-26 02:18:17,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 223 treesize of output 225 [2021-08-26 02:18:17,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:17,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:17,166 INFO L354 Elim1Store]: treesize reduction 402, result has 13.0 percent of original size [2021-08-26 02:18:17,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 219 treesize of output 221 [2021-08-26 02:18:17,860 INFO L354 Elim1Store]: treesize reduction 117, result has 3.3 percent of original size [2021-08-26 02:18:17,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 205 treesize of output 115 [2021-08-26 02:18:17,875 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-08-26 02:18:17,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 91 treesize of output 59 [2021-08-26 02:18:17,933 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-08-26 02:18:17,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-08-26 02:18:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:18:17,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713756288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:18:17,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:18:17,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-26 02:18:17,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006555915] [2021-08-26 02:18:17,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 02:18:17,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:18:17,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 02:18:17,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-26 02:18:17,963 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2021-08-26 02:18:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:18:19,488 INFO L93 Difference]: Finished difference Result 274 states and 344 transitions. [2021-08-26 02:18:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 02:18:19,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) Word has length 21 [2021-08-26 02:18:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:18:19,489 INFO L225 Difference]: With dead ends: 274 [2021-08-26 02:18:19,489 INFO L226 Difference]: Without dead ends: 239 [2021-08-26 02:18:19,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1035.2ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-08-26 02:18:19,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-08-26 02:18:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 156. [2021-08-26 02:18:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 154 states have (on average 1.2792207792207793) internal successors, (197), 155 states have internal predecessors, (197), 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) [2021-08-26 02:18:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 197 transitions. [2021-08-26 02:18:19,498 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 197 transitions. Word has length 21 [2021-08-26 02:18:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:18:19,498 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 197 transitions. [2021-08-26 02:18:19,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2021-08-26 02:18:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 197 transitions. [2021-08-26 02:18:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 02:18:19,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:18:19,499 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:18:19,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 02:18:19,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:18:19,709 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 02:18:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:18:19,709 INFO L82 PathProgramCache]: Analyzing trace with hash -800532698, now seen corresponding path program 1 times [2021-08-26 02:18:19,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:18:19,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366428232] [2021-08-26 02:18:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:18:19,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:18:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:18:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:18:19,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:18:19,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366428232] [2021-08-26 02:18:19,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366428232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:18:19,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009622026] [2021-08-26 02:18:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:18:19,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:18:19,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:18:19,919 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:18:19,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 02:18:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:18:20,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-26 02:18:20,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:18:20,609 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-08-26 02:18:20,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-08-26 02:18:20,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:20,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:20,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 245 treesize of output 220 [2021-08-26 02:18:20,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:20,693 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-08-26 02:18:20,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 269 treesize of output 203 [2021-08-26 02:18:20,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:20,775 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-08-26 02:18:20,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 355 treesize of output 209 [2021-08-26 02:18:20,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:20,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:20,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:20,854 INFO L354 Elim1Store]: treesize reduction 268, result has 15.7 percent of original size [2021-08-26 02:18:20,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 324 treesize of output 289 [2021-08-26 02:18:20,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 236 [2021-08-26 02:18:20,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 236 treesize of output 200 [2021-08-26 02:18:21,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:21,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:21,081 INFO L354 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2021-08-26 02:18:21,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 231 treesize of output 175 [2021-08-26 02:18:21,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 215 [2021-08-26 02:18:21,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:21,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:21,122 INFO L354 Elim1Store]: treesize reduction 180, result has 15.9 percent of original size [2021-08-26 02:18:21,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 212 treesize of output 226 [2021-08-26 02:18:21,142 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-26 02:18:21,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 212 [2021-08-26 02:18:21,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:21,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:21,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:21,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:21,411 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-08-26 02:18:21,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 247 treesize of output 179 [2021-08-26 02:18:21,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:21,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:21,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:21,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:18:21,442 INFO L354 Elim1Store]: treesize reduction 204, result has 11.7 percent of original size [2021-08-26 02:18:21,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 228 treesize of output 230 [2021-08-26 02:18:21,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:18:21,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 208 [2021-08-26 02:18:22,402 INFO L354 Elim1Store]: treesize reduction 169, result has 4.5 percent of original size [2021-08-26 02:18:22,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 119 [2021-08-26 02:18:22,430 INFO L354 Elim1Store]: treesize reduction 146, result has 2.0 percent of original size [2021-08-26 02:18:22,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 62 [2021-08-26 02:18:22,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:18:22,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-08-26 02:18:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:18:22,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009622026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:18:22,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:18:22,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-26 02:18:22,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546801364] [2021-08-26 02:18:22,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 02:18:22,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:18:22,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 02:18:22,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-26 02:18:22,498 INFO L87 Difference]: Start difference. First operand 156 states and 197 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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) [2021-08-26 02:18:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:18:28,327 INFO L93 Difference]: Finished difference Result 324 states and 409 transitions. [2021-08-26 02:18:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 02:18:28,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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 21 [2021-08-26 02:18:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:18:28,328 INFO L225 Difference]: With dead ends: 324 [2021-08-26 02:18:28,328 INFO L226 Difference]: Without dead ends: 289 [2021-08-26 02:18:28,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3341.7ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-08-26 02:18:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-08-26 02:18:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 204. [2021-08-26 02:18:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 202 states have (on average 1.2871287128712872) internal successors, (260), 203 states have internal predecessors, (260), 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) [2021-08-26 02:18:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 260 transitions. [2021-08-26 02:18:28,338 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 260 transitions. Word has length 21 [2021-08-26 02:18:28,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:18:28,338 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 260 transitions. [2021-08-26 02:18:28,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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) [2021-08-26 02:18:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 260 transitions. [2021-08-26 02:18:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 02:18:28,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:18:28,339 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:18:28,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 02:18:28,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:18:28,541 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 02:18:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:18:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash -962615628, now seen corresponding path program 1 times [2021-08-26 02:18:28,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:18:28,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875404085] [2021-08-26 02:18:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:18:28,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:18:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 02:18:28,558 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 02:18:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 02:18:28,591 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 02:18:28,592 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 02:18:28,592 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:18:28,595 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:18:28,595 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:18:28,595 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:18:28,595 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:18:28,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-26 02:18:28,601 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 02:18:28,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:18:28 BoogieIcfgContainer [2021-08-26 02:18:28,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 02:18:28,636 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 02:18:28,636 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 02:18:28,636 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 02:18:28,637 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:17:38" (3/4) ... [2021-08-26 02:18:28,638 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 02:18:28,863 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 02:18:28,863 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 02:18:28,864 INFO L168 Benchmark]: Toolchain (without parser) took 50757.73 ms. Allocated memory was 58.7 MB in the beginning and 197.1 MB in the end (delta: 138.4 MB). Free memory was 36.6 MB in the beginning and 68.8 MB in the end (delta: -32.2 MB). Peak memory consumption was 106.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:18:28,864 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 58.7 MB. Free memory was 40.9 MB in the beginning and 40.8 MB in the end (delta: 38.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:18:28,864 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.80 ms. Allocated memory is still 58.7 MB. Free memory was 36.4 MB in the beginning and 35.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-26 02:18:28,864 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.12 ms. Allocated memory is still 58.7 MB. Free memory was 35.1 MB in the beginning and 33.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:18:28,865 INFO L168 Benchmark]: Boogie Preprocessor took 25.74 ms. Allocated memory is still 58.7 MB. Free memory was 32.9 MB in the beginning and 31.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:18:28,865 INFO L168 Benchmark]: RCFGBuilder took 473.62 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 31.2 MB in the beginning and 53.0 MB in the end (delta: -21.8 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. [2021-08-26 02:18:28,865 INFO L168 Benchmark]: TraceAbstraction took 49635.15 ms. Allocated memory was 77.6 MB in the beginning and 197.1 MB in the end (delta: 119.5 MB). Free memory was 52.4 MB in the beginning and 71.9 MB in the end (delta: -19.5 MB). Peak memory consumption was 98.3 MB. Max. memory is 16.1 GB. [2021-08-26 02:18:28,866 INFO L168 Benchmark]: Witness Printer took 227.23 ms. Allocated memory is still 197.1 MB. Free memory was 71.9 MB in the beginning and 68.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 02:18:28,870 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 58.7 MB. Free memory was 40.9 MB in the beginning and 40.8 MB in the end (delta: 38.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 361.80 ms. Allocated memory is still 58.7 MB. Free memory was 36.4 MB in the beginning and 35.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.12 ms. Allocated memory is still 58.7 MB. Free memory was 35.1 MB in the beginning and 33.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.74 ms. Allocated memory is still 58.7 MB. Free memory was 32.9 MB in the beginning and 31.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 473.62 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 31.2 MB in the beginning and 53.0 MB in the end (delta: -21.8 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 49635.15 ms. Allocated memory was 77.6 MB in the beginning and 197.1 MB in the end (delta: 119.5 MB). Free memory was 52.4 MB in the beginning and 71.9 MB in the end (delta: -19.5 MB). Peak memory consumption was 98.3 MB. Max. memory is 16.1 GB. * Witness Printer took 227.23 ms. Allocated memory is still 197.1 MB. Free memory was 71.9 MB in the beginning and 68.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1061]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1004] BCK* bucket = malloc(sizeof(BCK)); [L1005] bucket->data = 0 [L1006] bucket->list = ((void*)0) [L1008] bucket->next = malloc(sizeof(BCK)) [L1009] EXPR bucket->next [L1009] BCK* bcki = bucket->next; [L1010] bcki->data = 1 [L1011] bcki->list = ((void*)0) [L1013] bcki->next = malloc(sizeof(BCK)) [L1014] EXPR bcki->next [L1014] bcki = bcki->next [L1015] bcki->data = 2 [L1016] bcki->list = ((void*)0) [L1017] bcki->next = ((void*)0) [L1019] struct TSLL* item = ((void*)0); [L1020] struct TSLL* itr = ((void*)0); [L1021] COND TRUE __VERIFIER_nondet_int() [L1023] item = malloc(sizeof(SLL)) [L1024] item->next = ((void*)0) [L1025] COND TRUE __VERIFIER_nondet_int() [L1026] item->data = 0 [L1032] bcki = bucket [L1034] COND FALSE !(!(bcki != ((void*)0))) [L1035] COND FALSE !(!(item != ((void*)0))) [L1036] EXPR bcki->data [L1036] EXPR item->data [L1036] COND FALSE !(bcki->data != item->data) [L1038] COND FALSE !(!(bcki != ((void*)0))) [L1040] EXPR bcki->list [L1040] COND TRUE bcki->list == ((void*)0) [L1041] bcki->list = item [L1021] COND FALSE !(__VERIFIER_nondet_int()) [L1052] bcki = bucket [L1053] COND TRUE bcki != ((void*)0) [L1055] EXPR bcki->list [L1055] item = bcki->list [L1056] bcki->list = ((void*)0) [L1057] COND TRUE item != ((void*)0) [L1059] itr = item [L1060] EXPR item->next [L1060] item = item->next [L1061] EXPR itr->data [L1061] EXPR bcki->data [L1061] COND TRUE !(itr->data != bcki->data) [L1061] reach_error() - UnprovableResult [Line: 1034]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 49560.9ms, OverallIterations: 12, TraceHistogramMax: 4, EmptinessCheckTime: 15.3ms, AutomataDifference: 32775.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 401 SDtfs, 1477 SDslu, 1730 SDs, 0 SdLazy, 2453 SolverSat, 343 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 26679.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 261 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 6986.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=204occurred in iteration=11, InterpolantAutomatonStates: 106, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.5ms AutomataMinimizationTime, 11 MinimizatonAttempts, 416 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 98.1ms SsaConstructionTime, 720.3ms SatisfiabilityAnalysisTime, 12678.6ms InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 279 ConstructedInterpolants, 51 QuantifiedInterpolants, 16124 SizeOfPredicates, 55 NumberOfNonLiveVariables, 904 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 38/98 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 02:18:29,108 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-26 02:18:29,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...