./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-properties/simple_built_from_end.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/list-properties/simple_built_from_end.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 279a162aa90145a7316b3266460570a8e3cad8e6 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Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/list-properties/simple_built_from_end.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 279a162aa90145a7316b3266460570a8e3cad8e6 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:05:51,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:05:51,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:05:51,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:05:51,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:05:51,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:05:51,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:05:51,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:05:51,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:05:51,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:05:51,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:05:51,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:05:51,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:05:51,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:05:51,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:05:51,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:05:51,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:05:51,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:05:51,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:05:51,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:05:51,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:05:51,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:05:51,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:05:51,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:05:51,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:05:51,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:05:51,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:05:51,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:05:51,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:05:51,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:05:51,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:05:51,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:05:51,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:05:51,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:05:51,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:05:51,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:05:51,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:05:51,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:05:51,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:05:51,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:05:51,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:05:51,935 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 02:05:51,964 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:05:51,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:05:51,965 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:05:51,965 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:05:51,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:05:51,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:05:51,967 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:05:51,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:05:51,968 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:05:51,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 02:05:51,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:05:51,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:05:51,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:05:51,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:05:51,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:05:51,969 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:05:51,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:05:51,969 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:05:51,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:05:51,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:05:51,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:05:51,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:05:51,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:05:51,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:05:51,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:05:51,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:05:51,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 02:05:51,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 02:05:51,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:05:51,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:05:51,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2021-08-26 02:05:52,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:05:52,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:05:52,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:05:52,254 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:05:52,255 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:05:52,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-08-26 02:05:52,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37f640915/219222abffc5478c81899309bf0179bf/FLAG08152ac49 [2021-08-26 02:05:52,842 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:05:52,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-08-26 02:05:52,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37f640915/219222abffc5478c81899309bf0179bf/FLAG08152ac49 [2021-08-26 02:05:53,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37f640915/219222abffc5478c81899309bf0179bf [2021-08-26 02:05:53,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:05:53,293 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:05:53,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:05:53,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:05:53,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:05:53,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:05:53" (1/1) ... [2021-08-26 02:05:53,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b6ee5e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:05:53, skipping insertion in model container [2021-08-26 02:05:53,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:05:53" (1/1) ... [2021-08-26 02:05:53,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:05:53,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:05:53,500 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/list-properties/simple_built_from_end.i[23125,23138] [2021-08-26 02:05:53,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:05:53,508 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:05:53,531 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/list-properties/simple_built_from_end.i[23125,23138] [2021-08-26 02:05:53,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:05:53,549 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:05:53,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:05:53 WrapperNode [2021-08-26 02:05:53,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:05:53,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:05:53,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:05:53,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:05:53,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:05:53" (1/1) ... [2021-08-26 02:05:53,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:05:53" (1/1) ... [2021-08-26 02:05:53,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:05:53,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:05:53,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:05:53,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:05:53,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:05:53" (1/1) ... [2021-08-26 02:05:53,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:05:53" (1/1) ... [2021-08-26 02:05:53,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:05:53" (1/1) ... [2021-08-26 02:05:53,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:05:53" (1/1) ... [2021-08-26 02:05:53,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:05:53" (1/1) ... [2021-08-26 02:05:53,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:05:53" (1/1) ... [2021-08-26 02:05:53,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:05:53" (1/1) ... [2021-08-26 02:05:53,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:05:53,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:05:53,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:05:53,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:05:53,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:05:53" (1/1) ... [2021-08-26 02:05:53,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:05:53,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:05:53,642 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 02:05:53,709 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 02:05:53,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 02:05:53,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 02:05:53,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:05:53,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:05:53,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:05:53,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:05:53,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 02:05:53,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:05:53,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:05:53,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:05:54,004 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-26 02:05:54,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:05:54 BoogieIcfgContainer [2021-08-26 02:05:54,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:05:54,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:05:54,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:05:54,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:05:54,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:05:53" (1/3) ... [2021-08-26 02:05:54,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406095aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:05:54, skipping insertion in model container [2021-08-26 02:05:54,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:05:53" (2/3) ... [2021-08-26 02:05:54,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406095aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:05:54, skipping insertion in model container [2021-08-26 02:05:54,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:05:54" (3/3) ... [2021-08-26 02:05:54,012 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-08-26 02:05:54,015 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:05:54,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 02:05:54,061 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:05:54,068 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 02:05:54,069 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 02:05:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 02:05:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 02:05:54,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:05:54,084 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 02:05:54,086 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:05:54,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:05:54,090 INFO L82 PathProgramCache]: Analyzing trace with hash 890037006, now seen corresponding path program 1 times [2021-08-26 02:05:54,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:05:54,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911487137] [2021-08-26 02:05:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:05:54,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:05:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:05:54,244 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 02:05:54,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:05:54,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911487137] [2021-08-26 02:05:54,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911487137] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:05:54,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:05:54,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 02:05:54,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554590867] [2021-08-26 02:05:54,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:05:54,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:05:54,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:05:54,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:05:54,272 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:05:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:05:54,286 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2021-08-26 02:05:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:05:54,287 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-26 02:05:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:05:54,291 INFO L225 Difference]: With dead ends: 23 [2021-08-26 02:05:54,291 INFO L226 Difference]: Without dead ends: 11 [2021-08-26 02:05:54,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:05:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-08-26 02:05:54,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-08-26 02:05:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 02:05:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-08-26 02:05:54,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-08-26 02:05:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:05:54,326 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-08-26 02:05:54,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:05:54,326 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-08-26 02:05:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 02:05:54,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:05:54,326 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:05:54,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 02:05:54,327 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:05:54,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:05:54,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1806862075, now seen corresponding path program 1 times [2021-08-26 02:05:54,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:05:54,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028602710] [2021-08-26 02:05:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:05:54,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:05:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:05:54,385 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 02:05:54,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:05:54,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028602710] [2021-08-26 02:05:54,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028602710] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:05:54,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:05:54,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 02:05:54,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489479520] [2021-08-26 02:05:54,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:05:54,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:05:54,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:05:54,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:05:54,388 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:05:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:05:54,404 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-08-26 02:05:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:05:54,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-26 02:05:54,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:05:54,404 INFO L225 Difference]: With dead ends: 21 [2021-08-26 02:05:54,404 INFO L226 Difference]: Without dead ends: 15 [2021-08-26 02:05:54,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:05:54,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-26 02:05:54,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-08-26 02:05:54,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 02:05:54,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-08-26 02:05:54,407 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 7 [2021-08-26 02:05:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:05:54,407 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-08-26 02:05:54,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:05:54,407 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-08-26 02:05:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 02:05:54,408 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:05:54,408 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:05:54,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 02:05:54,408 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:05:54,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:05:54,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1217762572, now seen corresponding path program 1 times [2021-08-26 02:05:54,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:05:54,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590629352] [2021-08-26 02:05:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:05:54,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:05:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:05:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:05:54,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:05:54,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590629352] [2021-08-26 02:05:54,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590629352] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:05:54,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:05:54,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 02:05:54,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427819955] [2021-08-26 02:05:54,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:05:54,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:05:54,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:05:54,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:05:54,460 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 02:05:54,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:05:54,482 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-08-26 02:05:54,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:05:54,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2021-08-26 02:05:54,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:05:54,483 INFO L225 Difference]: With dead ends: 20 [2021-08-26 02:05:54,483 INFO L226 Difference]: Without dead ends: 18 [2021-08-26 02:05:54,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:05:54,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-26 02:05:54,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2021-08-26 02:05:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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 02:05:54,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-08-26 02:05:54,485 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-08-26 02:05:54,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:05:54,486 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-08-26 02:05:54,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 02:05:54,486 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-08-26 02:05:54,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 02:05:54,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:05:54,486 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:05:54,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 02:05:54,487 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:05:54,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:05:54,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1228764301, now seen corresponding path program 1 times [2021-08-26 02:05:54,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:05:54,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444706145] [2021-08-26 02:05:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:05:54,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:05:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:05:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:05:54,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:05:54,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444706145] [2021-08-26 02:05:54,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444706145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:05:54,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110462314] [2021-08-26 02:05:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:05:54,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:05:54,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:05:54,552 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 02:05:54,553 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 02:05:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:05:54,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 02:05:54,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:05:54,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:05:54,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:05:54,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-26 02:05:54,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-08-26 02:05:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:05:54,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110462314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:05:54,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:05:54,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-08-26 02:05:54,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88561010] [2021-08-26 02:05:54,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 02:05:54,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:05:54,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 02:05:54,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:05:54,847 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 02:05:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:05:54,868 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-08-26 02:05:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:05:54,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 14 [2021-08-26 02:05:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:05:54,869 INFO L225 Difference]: With dead ends: 30 [2021-08-26 02:05:54,869 INFO L226 Difference]: Without dead ends: 21 [2021-08-26 02:05:54,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:05:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-26 02:05:54,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-08-26 02:05:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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 02:05:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-08-26 02:05:54,872 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2021-08-26 02:05:54,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:05:54,872 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-08-26 02:05:54,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 02:05:54,872 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-08-26 02:05:54,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 02:05:54,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:05:54,873 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:05:54,894 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 02:05:55,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:05:55,089 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:05:55,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:05:55,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1718933108, now seen corresponding path program 2 times [2021-08-26 02:05:55,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:05:55,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214399437] [2021-08-26 02:05:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:05:55,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:05:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:05:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:05:55,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:05:55,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214399437] [2021-08-26 02:05:55,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214399437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:05:55,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123076014] [2021-08-26 02:05:55,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:05:55,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:05:55,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:05:55,284 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 02:05:55,285 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 02:05:55,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:05:55,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:05:55,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 02:05:55,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:05:55,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:05:55,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:05:55,423 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 22 treesize of output 7 [2021-08-26 02:05:55,467 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:05:55,471 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 11 treesize of output 11 [2021-08-26 02:05:55,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-08-26 02:05:55,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:05:55,553 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-08-26 02:05:55,553 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 1 case distinctions, treesize of input 46 treesize of output 34 [2021-08-26 02:05:55,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:05:55,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-08-26 02:05:55,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-08-26 02:05:55,713 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:05:55,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-08-26 02:05:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:05:55,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123076014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:05:55,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:05:55,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-26 02:05:55,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493718372] [2021-08-26 02:05:55,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 02:05:55,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:05:55,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 02:05:55,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-26 02:05:55,720 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 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 02:05:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:05:55,909 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-08-26 02:05:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 02:05:55,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 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 02:05:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:05:55,910 INFO L225 Difference]: With dead ends: 27 [2021-08-26 02:05:55,910 INFO L226 Difference]: Without dead ends: 25 [2021-08-26 02:05:55,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-08-26 02:05:55,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-26 02:05:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-08-26 02:05:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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 02:05:55,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-08-26 02:05:55,913 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-08-26 02:05:55,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:05:55,913 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-08-26 02:05:55,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 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 02:05:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-08-26 02:05:55,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 02:05:55,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:05:55,913 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-08-26 02:05:55,933 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 02:05:56,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:05:56,131 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:05:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:05:56,131 INFO L82 PathProgramCache]: Analyzing trace with hash -154052339, now seen corresponding path program 3 times [2021-08-26 02:05:56,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:05:56,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564228093] [2021-08-26 02:05:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:05:56,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:05:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:05:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:05:56,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:05:56,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564228093] [2021-08-26 02:05:56,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564228093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:05:56,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069923961] [2021-08-26 02:05:56,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:05:56,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:05:56,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:05:56,357 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 02:05:56,400 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 02:05:56,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 02:05:56,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:05:56,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-26 02:05:56,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:05:56,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:05:56,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:05:56,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:05:56,574 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:05:56,574 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 11 treesize of output 11 [2021-08-26 02:05:56,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:05:56,632 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:05:56,632 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 1 case distinctions, treesize of input 63 treesize of output 66 [2021-08-26 02:05:56,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:05:56,648 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-08-26 02:05:56,648 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 1 case distinctions, treesize of input 53 treesize of output 56 [2021-08-26 02:05:56,849 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-26 02:05:56,850 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 44 [2021-08-26 02:05:56,861 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-26 02:05:56,861 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-08-26 02:05:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:05:56,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069923961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:05:56,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:05:56,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-26 02:05:56,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954226071] [2021-08-26 02:05:56,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 02:05:56,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:05:56,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 02:05:56,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-26 02:05:56,872 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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 02:05:56,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:05:56,934 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-08-26 02:05:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 02:05:56,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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 02:05:56,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:05:56,943 INFO L225 Difference]: With dead ends: 40 [2021-08-26 02:05:56,943 INFO L226 Difference]: Without dead ends: 28 [2021-08-26 02:05:56,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:05:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-26 02:05:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-08-26 02:05:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 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 02:05:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-08-26 02:05:56,946 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2021-08-26 02:05:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:05:56,946 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-08-26 02:05:56,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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 02:05:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-08-26 02:05:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 02:05:56,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:05:56,947 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-08-26 02:05:56,965 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 02:05:57,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:05:57,165 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:05:57,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:05:57,165 INFO L82 PathProgramCache]: Analyzing trace with hash -336964282, now seen corresponding path program 4 times [2021-08-26 02:05:57,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:05:57,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828293282] [2021-08-26 02:05:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:05:57,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:05:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:05:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:05:57,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:05:57,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828293282] [2021-08-26 02:05:57,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828293282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:05:57,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638975021] [2021-08-26 02:05:57,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:05:57,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:05:57,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:05:57,438 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 02:05:57,439 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 02:05:57,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:05:57,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:05:57,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-26 02:05:57,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:05:57,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:05:57,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:05:57,600 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 22 treesize of output 7 [2021-08-26 02:05:57,634 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:05:57,634 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 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:05:57,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-08-26 02:05:57,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:05:57,715 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-08-26 02:05:57,716 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 1 case distinctions, treesize of input 57 treesize of output 45 [2021-08-26 02:05:57,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:05:57,809 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-08-26 02:05:57,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-08-26 02:05:57,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:05:57,923 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:05:57,924 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 1 case distinctions, treesize of input 112 treesize of output 107 [2021-08-26 02:05:57,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:05:57,946 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-08-26 02:05:57,947 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 138 treesize of output 129 [2021-08-26 02:05:57,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:05:57,963 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-08-26 02:05:57,963 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 1 case distinctions, treesize of input 111 treesize of output 114 [2021-08-26 02:05:58,329 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-08-26 02:05:58,330 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 70 [2021-08-26 02:05:58,341 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-26 02:05:58,342 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 51 [2021-08-26 02:05:58,406 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:05:58,406 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 41 treesize of output 25 [2021-08-26 02:05:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:05:58,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638975021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:05:58,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:05:58,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-08-26 02:05:58,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231687886] [2021-08-26 02:05:58,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 02:05:58,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:05:58,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 02:05:58,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-26 02:05:58,416 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:06:02,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:06:02,930 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-08-26 02:06:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 02:06:02,931 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-26 02:06:02,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:06:02,931 INFO L225 Difference]: With dead ends: 34 [2021-08-26 02:06:02,931 INFO L226 Difference]: Without dead ends: 32 [2021-08-26 02:06:02,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 605.4ms TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2021-08-26 02:06:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-26 02:06:02,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-08-26 02:06:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 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 02:06:02,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-08-26 02:06:02,934 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2021-08-26 02:06:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:06:02,934 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-08-26 02:06:02,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:06:02,935 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-08-26 02:06:02,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:06:02,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:06:02,935 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-08-26 02:06:02,977 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 02:06:03,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:06:03,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:06:03,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:06:03,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1159556869, now seen corresponding path program 5 times [2021-08-26 02:06:03,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:06:03,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882633809] [2021-08-26 02:06:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:06:03,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:06:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:06:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:06:03,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:06:03,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882633809] [2021-08-26 02:06:03,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882633809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:06:03,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437848484] [2021-08-26 02:06:03,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 02:06:03,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:06:03,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:06:03,395 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 02:06:03,396 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 02:06:03,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-26 02:06:03,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:06:03,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-26 02:06:03,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:06:03,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:06:03,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:06:03,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:06:03,693 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:06:03,693 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 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:06:03,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:06:03,798 INFO L354 Elim1Store]: treesize reduction 75, result has 10.7 percent of original size [2021-08-26 02:06:03,798 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 1 case distinctions, treesize of input 72 treesize of output 75 [2021-08-26 02:06:03,810 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-08-26 02:06:03,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2021-08-26 02:06:03,824 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-08-26 02:06:03,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 52 [2021-08-26 02:06:03,907 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-08-26 02:06:03,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-08-26 02:06:03,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:06:04,008 INFO L354 Elim1Store]: treesize reduction 136, result has 13.4 percent of original size [2021-08-26 02:06:04,008 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 3 case distinctions, treesize of input 99 treesize of output 96 [2021-08-26 02:06:04,021 INFO L354 Elim1Store]: treesize reduction 87, result has 16.3 percent of original size [2021-08-26 02:06:04,023 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 2 case distinctions, treesize of input 131 treesize of output 115 [2021-08-26 02:06:04,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:06:04,044 INFO L354 Elim1Store]: treesize reduction 120, result has 20.5 percent of original size [2021-08-26 02:06:04,045 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 111 [2021-08-26 02:06:04,425 INFO L354 Elim1Store]: treesize reduction 126, result has 8.0 percent of original size [2021-08-26 02:06:04,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 97 [2021-08-26 02:06:04,450 INFO L354 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2021-08-26 02:06:04,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 46 [2021-08-26 02:06:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:06:04,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437848484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:06:04,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:06:04,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-26 02:06:04,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229642220] [2021-08-26 02:06:04,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 02:06:04,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:06:04,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 02:06:04,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:06:04,463 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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 02:06:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:06:10,021 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-08-26 02:06:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 02:06:10,022 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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 28 [2021-08-26 02:06:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:06:10,022 INFO L225 Difference]: With dead ends: 50 [2021-08-26 02:06:10,022 INFO L226 Difference]: Without dead ends: 35 [2021-08-26 02:06:10,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-08-26 02:06:10,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-26 02:06:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-08-26 02:06:10,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 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 02:06:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-08-26 02:06:10,025 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-08-26 02:06:10,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:06:10,025 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-08-26 02:06:10,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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 02:06:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-08-26 02:06:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 02:06:10,026 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:06:10,026 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2021-08-26 02:06:10,044 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 02:06:10,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:06:10,226 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:06:10,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:06:10,227 INFO L82 PathProgramCache]: Analyzing trace with hash 605622946, now seen corresponding path program 6 times [2021-08-26 02:06:10,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:06:10,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88538936] [2021-08-26 02:06:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:06:10,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:06:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:06:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:06:10,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:06:10,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88538936] [2021-08-26 02:06:10,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88538936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:06:10,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416247920] [2021-08-26 02:06:10,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 02:06:10,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:06:10,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:06:10,821 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 02:06:10,822 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 02:06:11,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-26 02:06:11,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:06:11,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-26 02:06:11,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:06:11,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:06:11,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:06:11,106 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 22 treesize of output 7 [2021-08-26 02:06:11,138 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:06:11,139 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 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:06:11,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-08-26 02:06:11,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:06:11,228 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-08-26 02:06:11,229 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 1 case distinctions, treesize of input 57 treesize of output 45 [2021-08-26 02:06:11,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:06:11,392 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-08-26 02:06:11,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 28 treesize of output 45 [2021-08-26 02:06:11,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:06:11,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:06:11,591 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:06:11,591 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 1 case distinctions, treesize of input 126 treesize of output 117 [2021-08-26 02:06:11,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:06:11,629 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-08-26 02:06:11,629 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 164 treesize of output 155 [2021-08-26 02:06:11,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:06:11,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:06:11,643 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-08-26 02:06:11,643 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 1 case distinctions, treesize of input 137 treesize of output 140 [2021-08-26 02:06:11,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:06:11,804 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-08-26 02:06:11,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 41 [2021-08-26 02:06:11,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:06:11,972 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-08-26 02:06:11,972 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 3 case distinctions, treesize of input 170 treesize of output 139 [2021-08-26 02:06:11,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:06:11,995 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-08-26 02:06:11,996 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 214 treesize of output 220 [2021-08-26 02:06:12,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:06:12,030 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-08-26 02:06:12,030 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 6 case distinctions, treesize of input 207 treesize of output 201 [2021-08-26 02:06:12,636 INFO L354 Elim1Store]: treesize reduction 110, result has 14.7 percent of original size [2021-08-26 02:06:12,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 220 treesize of output 126 [2021-08-26 02:06:12,658 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-08-26 02:06:12,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 81 [2021-08-26 02:06:16,787 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-26 02:06:16,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 40 [2021-08-26 02:06:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:06:16,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416247920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:06:16,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:06:16,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 27 [2021-08-26 02:06:16,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787763253] [2021-08-26 02:06:16,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-26 02:06:16,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:06:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-26 02:06:16,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=586, Unknown=2, NotChecked=0, Total=702 [2021-08-26 02:06:16,795 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 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 02:06:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:06:39,670 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-08-26 02:06:39,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 02:06:39,671 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 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 32 [2021-08-26 02:06:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:06:39,671 INFO L225 Difference]: With dead ends: 41 [2021-08-26 02:06:39,671 INFO L226 Difference]: Without dead ends: 39 [2021-08-26 02:06:39,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 13201.9ms TimeCoverageRelationStatistics Valid=319, Invalid=1235, Unknown=6, NotChecked=0, Total=1560 [2021-08-26 02:06:39,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-26 02:06:39,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-08-26 02:06:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 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 02:06:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-08-26 02:06:39,674 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2021-08-26 02:06:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:06:39,674 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-08-26 02:06:39,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 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 02:06:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-08-26 02:06:39,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-26 02:06:39,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:06:39,675 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-08-26 02:06:39,707 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 02:06:39,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:06:39,885 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:06:39,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:06:39,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1039628769, now seen corresponding path program 7 times [2021-08-26 02:06:39,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:06:39,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546620762] [2021-08-26 02:06:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:06:39,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:06:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:06:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:06:40,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:06:40,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546620762] [2021-08-26 02:06:40,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546620762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:06:40,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552568630] [2021-08-26 02:06:40,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 02:06:40,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:06:40,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:06:40,549 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 02:06:40,565 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 02:06:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:06:40,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 68 conjunts are in the unsatisfiable core [2021-08-26 02:06:40,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:06:40,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:06:40,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:06:40,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:06:40,973 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:06:40,973 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 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:06:41,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:06:41,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:06:41,030 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:06:41,030 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 1 case distinctions, treesize of input 68 treesize of output 71 [2021-08-26 02:06:41,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:06:41,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:06:41,043 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-08-26 02:06:41,043 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 1 case distinctions, treesize of input 64 treesize of output 67 [2021-08-26 02:06:41,133 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-08-26 02:06:41,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 28 treesize of output 45 [2021-08-26 02:06:41,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:06:41,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:06:41,265 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-08-26 02:06:41,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 101 [2021-08-26 02:06:41,270 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-08-26 02:06:41,270 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 146 treesize of output 137 [2021-08-26 02:06:41,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:06:41,287 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-08-26 02:06:41,287 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 131 treesize of output 133 [2021-08-26 02:06:41,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:06:41,400 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-08-26 02:06:41,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 41 [2021-08-26 02:06:41,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:06:41,550 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-08-26 02:06:41,550 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 116 [2021-08-26 02:06:41,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:06:41,578 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-08-26 02:06:41,579 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 6 case distinctions, treesize of input 183 treesize of output 192 [2021-08-26 02:06:42,234 INFO L354 Elim1Store]: treesize reduction 239, result has 8.4 percent of original size [2021-08-26 02:06:42,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 286 treesize of output 144 [2021-08-26 02:06:42,277 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-08-26 02:06:42,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 67 [2021-08-26 02:06:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:06:42,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552568630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:06:42,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:06:42,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 26 [2021-08-26 02:06:42,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014402366] [2021-08-26 02:06:42,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-26 02:06:42,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:06:42,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-26 02:06:42,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-08-26 02:06:42,290 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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 02:07:00,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:07:00,366 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-08-26 02:07:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-26 02:07:00,367 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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 35 [2021-08-26 02:07:00,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:07:00,367 INFO L225 Difference]: With dead ends: 60 [2021-08-26 02:07:00,367 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 02:07:00,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1233.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 02:07:00,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 02:07:00,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-08-26 02:07:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:07:00,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-08-26 02:07:00,370 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2021-08-26 02:07:00,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:07:00,370 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-08-26 02:07:00,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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 02:07:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-08-26 02:07:00,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-26 02:07:00,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:07:00,371 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2021-08-26 02:07:00,393 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 02:07:00,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:07:00,580 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:07:00,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:07:00,581 INFO L82 PathProgramCache]: Analyzing trace with hash -342676840, now seen corresponding path program 8 times [2021-08-26 02:07:00,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:07:00,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371318300] [2021-08-26 02:07:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:07:00,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:07:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:07:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:07:01,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:07:01,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371318300] [2021-08-26 02:07:01,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371318300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:07:01,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967127712] [2021-08-26 02:07:01,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:07:01,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:07:01,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:07:01,577 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:07:01,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 02:07:02,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:07:02,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:07:02,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-26 02:07:02,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:07:02,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:07:02,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:07:02,054 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 22 treesize of output 7 [2021-08-26 02:07:02,082 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:07:02,082 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 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:07:02,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:07:02,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-08-26 02:07:02,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:07:02,155 INFO L354 Elim1Store]: treesize reduction 109, result has 10.7 percent of original size [2021-08-26 02:07:02,157 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 1 case distinctions, treesize of input 57 treesize of output 45 [2021-08-26 02:07:02,254 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-08-26 02:07:02,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 28 treesize of output 45 [2021-08-26 02:07:02,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:07:02,415 INFO L354 Elim1Store]: treesize reduction 75, result has 10.7 percent of original size [2021-08-26 02:07:02,416 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 1 case distinctions, treesize of input 136 treesize of output 121 [2021-08-26 02:07:02,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:07:02,446 INFO L354 Elim1Store]: treesize reduction 117, result has 11.4 percent of original size [2021-08-26 02:07:02,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 165 [2021-08-26 02:07:02,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:07:02,491 INFO L354 Elim1Store]: treesize reduction 262, result has 14.7 percent of original size [2021-08-26 02:07:02,492 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 182 treesize of output 173 [2021-08-26 02:07:02,662 INFO L354 Elim1Store]: treesize reduction 126, result has 37.6 percent of original size [2021-08-26 02:07:02,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 93 [2021-08-26 02:07:02,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:07:02,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:07:02,853 INFO L354 Elim1Store]: treesize reduction 136, result has 13.4 percent of original size [2021-08-26 02:07:02,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 167 [2021-08-26 02:07:02,874 INFO L354 Elim1Store]: treesize reduction 87, result has 16.3 percent of original size [2021-08-26 02:07:02,874 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 2 case distinctions, treesize of input 360 treesize of output 294 [2021-08-26 02:07:02,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:07:02,891 INFO L354 Elim1Store]: treesize reduction 120, result has 20.5 percent of original size [2021-08-26 02:07:02,891 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 345 treesize of output 290 [2021-08-26 02:07:02,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:07:02,953 INFO L354 Elim1Store]: treesize reduction 470, result has 13.6 percent of original size [2021-08-26 02:07:02,953 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 6 case distinctions, treesize of input 341 treesize of output 335 [2021-08-26 02:07:03,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:07:03,139 INFO L354 Elim1Store]: treesize reduction 16, result has 78.7 percent of original size [2021-08-26 02:07:03,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 68 treesize of output 74 [2021-08-26 02:07:03,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:07:03,324 INFO L354 Elim1Store]: treesize reduction 124, result has 15.1 percent of original size [2021-08-26 02:07:03,324 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 337 treesize of output 191 [2021-08-26 02:07:03,339 INFO L354 Elim1Store]: treesize reduction 163, result has 11.4 percent of original size [2021-08-26 02:07:03,339 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 483 treesize of output 396 [2021-08-26 02:07:03,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:07:03,377 INFO L354 Elim1Store]: treesize reduction 242, result has 17.7 percent of original size [2021-08-26 02:07:03,377 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 468 treesize of output 392 [2021-08-26 02:07:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:07:03,415 INFO L354 Elim1Store]: treesize reduction 754, result has 12.4 percent of original size [2021-08-26 02:07:03,415 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 464 treesize of output 461 [2021-08-26 02:07:27,019 INFO L354 Elim1Store]: treesize reduction 251, result has 8.1 percent of original size [2021-08-26 02:07:27,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 15 new quantified variables, introduced 21 case distinctions, treesize of input 527 treesize of output 204 [2021-08-26 02:07:27,071 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-26 02:07:27,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 117 [2021-08-26 02:07:29,328 INFO L354 Elim1Store]: treesize reduction 104, result has 1.0 percent of original size [2021-08-26 02:07:29,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 59 [2021-08-26 02:07:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:07:29,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967127712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:07:29,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:07:29,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 35 [2021-08-26 02:07:29,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934184024] [2021-08-26 02:07:29,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-26 02:07:29,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:07:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-26 02:07:29,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1066, Unknown=9, NotChecked=0, Total=1190 [2021-08-26 02:07:29,338 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 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 02:09:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:09:17,088 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-08-26 02:09:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 02:09:17,090 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 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 39 [2021-08-26 02:09:17,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:09:17,090 INFO L225 Difference]: With dead ends: 48 [2021-08-26 02:09:17,090 INFO L226 Difference]: Without dead ends: 46 [2021-08-26 02:09:17,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 67522.6ms TimeCoverageRelationStatistics Valid=495, Invalid=2449, Unknown=26, NotChecked=0, Total=2970 [2021-08-26 02:09:17,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-26 02:09:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-08-26 02:09:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:09:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-08-26 02:09:17,094 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2021-08-26 02:09:17,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:09:17,094 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-08-26 02:09:17,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 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 02:09:17,094 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-08-26 02:09:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-26 02:09:17,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:09:17,095 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2021-08-26 02:09:17,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 02:09:17,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-26 02:09:17,296 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:09:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:09:17,297 INFO L82 PathProgramCache]: Analyzing trace with hash 456319593, now seen corresponding path program 9 times [2021-08-26 02:09:17,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:09:17,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668675424] [2021-08-26 02:09:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:09:17,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:09:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:09:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:09:18,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:09:18,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668675424] [2021-08-26 02:09:18,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668675424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:09:18,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706661068] [2021-08-26 02:09:18,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:09:18,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:09:18,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:09:18,152 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:09:18,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 02:09:18,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-26 02:09:18,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:09:18,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 85 conjunts are in the unsatisfiable core [2021-08-26 02:09:18,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:09:18,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:09:18,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:09:18,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:09:18,862 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:09:18,863 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 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:09:18,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:18,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:09:18,924 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:09:18,924 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 1 case distinctions, treesize of input 68 treesize of output 71 [2021-08-26 02:09:18,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:18,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:09:18,936 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-08-26 02:09:18,937 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 1 case distinctions, treesize of input 64 treesize of output 67 [2021-08-26 02:09:19,039 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-08-26 02:09:19,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 28 treesize of output 45 [2021-08-26 02:09:19,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:19,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:09:19,182 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-08-26 02:09:19,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 101 [2021-08-26 02:09:19,187 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-08-26 02:09:19,187 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 146 treesize of output 137 [2021-08-26 02:09:19,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:09:19,204 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-08-26 02:09:19,204 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 131 treesize of output 133 [2021-08-26 02:09:19,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:19,348 INFO L354 Elim1Store]: treesize reduction 102, result has 37.0 percent of original size [2021-08-26 02:09:19,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 77 [2021-08-26 02:09:19,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:19,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:09:19,558 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-08-26 02:09:19,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 131 [2021-08-26 02:09:19,565 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-08-26 02:09:19,565 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 3 case distinctions, treesize of input 240 treesize of output 234 [2021-08-26 02:09:19,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:09:19,591 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-08-26 02:09:19,592 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 225 treesize of output 230 [2021-08-26 02:09:19,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:19,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:19,786 INFO L354 Elim1Store]: treesize reduction 16, result has 74.6 percent of original size [2021-08-26 02:09:19,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 62 [2021-08-26 02:09:19,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:09:19,979 INFO L354 Elim1Store]: treesize reduction 112, result has 20.6 percent of original size [2021-08-26 02:09:19,980 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 216 treesize of output 141 [2021-08-26 02:09:19,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:09:20,023 INFO L354 Elim1Store]: treesize reduction 400, result has 16.1 percent of original size [2021-08-26 02:09:20,023 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 278 treesize of output 290 [2021-08-26 02:09:21,188 INFO L354 Elim1Store]: treesize reduction 400, result has 8.5 percent of original size [2021-08-26 02:09:21,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 19 new quantified variables, introduced 36 case distinctions, treesize of input 517 treesize of output 209 [2021-08-26 02:09:21,286 INFO L354 Elim1Store]: treesize reduction 364, result has 3.4 percent of original size [2021-08-26 02:09:21,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 110 treesize of output 94 [2021-08-26 02:09:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 5 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:09:21,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706661068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:09:21,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:09:21,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 32 [2021-08-26 02:09:21,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907020544] [2021-08-26 02:09:21,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-26 02:09:21,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:09:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-26 02:09:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-08-26 02:09:21,300 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 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 02:09:56,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:09:56,411 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-08-26 02:09:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 02:09:56,411 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 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 42 [2021-08-26 02:09:56,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:09:56,412 INFO L225 Difference]: With dead ends: 70 [2021-08-26 02:09:56,412 INFO L226 Difference]: Without dead ends: 49 [2021-08-26 02:09:56,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 2195.2ms TimeCoverageRelationStatistics Valid=249, Invalid=2103, Unknown=0, NotChecked=0, Total=2352 [2021-08-26 02:09:56,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-26 02:09:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-08-26 02:09:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 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 02:09:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-08-26 02:09:56,415 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2021-08-26 02:09:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:09:56,415 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-08-26 02:09:56,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 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 02:09:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-08-26 02:09:56,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 02:09:56,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:09:56,416 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2021-08-26 02:09:56,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-26 02:09:56,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:09:56,625 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:09:56,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:09:56,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1553331152, now seen corresponding path program 10 times [2021-08-26 02:09:56,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:09:56,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529355570] [2021-08-26 02:09:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:09:56,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:09:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:09:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 20 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:09:58,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:09:58,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529355570] [2021-08-26 02:09:58,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529355570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:09:58,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550282218] [2021-08-26 02:09:58,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:09:58,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:09:58,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:09:58,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:09:58,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 02:09:58,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:09:58,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:09:58,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-26 02:09:58,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:09:58,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:09:58,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:58,834 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 22 treesize of output 7 [2021-08-26 02:09:58,870 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:09:58,870 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 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:09:58,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-08-26 02:09:58,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:58,963 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-08-26 02:09:58,963 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 1 case distinctions, treesize of input 57 treesize of output 45 [2021-08-26 02:09:58,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:09:59,081 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-08-26 02:09:59,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 28 treesize of output 45 [2021-08-26 02:09:59,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:59,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:09:59,237 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:09:59,238 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 1 case distinctions, treesize of input 126 treesize of output 117 [2021-08-26 02:09:59,241 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 164 treesize of output 152 [2021-08-26 02:09:59,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:59,264 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-08-26 02:09:59,265 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 149 treesize of output 140 [2021-08-26 02:09:59,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:09:59,274 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-08-26 02:09:59,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 133 [2021-08-26 02:09:59,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:59,445 INFO L354 Elim1Store]: treesize reduction 102, result has 37.0 percent of original size [2021-08-26 02:09:59,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 77 [2021-08-26 02:09:59,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:59,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:09:59,682 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-08-26 02:09:59,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 154 [2021-08-26 02:09:59,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:59,716 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-08-26 02:09:59,716 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 6 case distinctions, treesize of input 271 treesize of output 265 [2021-08-26 02:09:59,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:59,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:09:59,739 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-08-26 02:09:59,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 244 treesize of output 250 [2021-08-26 02:09:59,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:59,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:59,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:09:59,988 INFO L354 Elim1Store]: treesize reduction 162, result has 37.5 percent of original size [2021-08-26 02:09:59,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 62 treesize of output 117 [2021-08-26 02:10:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:10:00,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:10:00,323 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-08-26 02:10:00,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 191 [2021-08-26 02:10:00,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:10:00,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:10:00,362 INFO L354 Elim1Store]: treesize reduction 222, result has 19.0 percent of original size [2021-08-26 02:10:00,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 394 treesize of output 403 [2021-08-26 02:10:00,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:10:00,406 INFO L354 Elim1Store]: treesize reduction 400, result has 16.1 percent of original size [2021-08-26 02:10:00,407 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 387 treesize of output 384 [2021-08-26 02:10:00,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:10:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:10:00,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:10:00,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:10:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:10:00,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:10:00,690 INFO L354 Elim1Store]: treesize reduction 20, result has 77.5 percent of original size [2021-08-26 02:10:00,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 87 [2021-08-26 02:10:00,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:10:00,989 INFO L354 Elim1Store]: treesize reduction 112, result has 20.6 percent of original size [2021-08-26 02:10:00,990 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 358 treesize of output 203 [2021-08-26 02:10:00,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:10:01,057 INFO L354 Elim1Store]: treesize reduction 650, result has 14.0 percent of original size [2021-08-26 02:10:01,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 474 treesize of output 474 [2021-08-26 02:10:01,063 INFO L354 Elim1Store]: treesize reduction 192, result has 0.5 percent of original size [2021-08-26 02:10:01,064 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 6 case distinctions, treesize of input 459 treesize of output 456 [2021-08-26 02:10:01,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:10:01,103 INFO L354 Elim1Store]: treesize reduction 400, result has 16.1 percent of original size [2021-08-26 02:10:01,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 444 treesize of output 452 [2021-08-26 02:10:02,990 INFO L354 Elim1Store]: treesize reduction 384, result has 12.1 percent of original size [2021-08-26 02:10:02,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 19 new quantified variables, introduced 36 case distinctions, treesize of input 652 treesize of output 268 [2021-08-26 02:10:03,093 INFO L354 Elim1Store]: treesize reduction 364, result has 3.4 percent of original size [2021-08-26 02:10:03,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 169 treesize of output 153 [2021-08-26 02:10:09,491 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-08-26 02:10:09,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 82 [2021-08-26 02:10:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 52 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:09,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550282218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:09,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:09,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 43 [2021-08-26 02:10:09,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495634273] [2021-08-26 02:10:09,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-26 02:10:09,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:09,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-26 02:10:09,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1543, Unknown=2, NotChecked=0, Total=1806 [2021-08-26 02:10:09,501 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 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 02:11:01,276 WARN L224 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-08-26 02:11:01,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-08-26 02:11:01,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-26 02:11:01,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 02:11:01,478 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:310) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:154) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:881) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Broken pipe at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:152) ... 35 more [2021-08-26 02:11:01,480 INFO L168 Benchmark]: Toolchain (without parser) took 308186.55 ms. Allocated memory was 65.0 MB in the beginning and 285.2 MB in the end (delta: 220.2 MB). Free memory was 47.9 MB in the beginning and 88.1 MB in the end (delta: -40.2 MB). Peak memory consumption was 179.9 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:01,480 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 48.2 MB. Free memory was 30.0 MB in the beginning and 30.0 MB in the end (delta: 36.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:11:01,480 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.72 ms. Allocated memory is still 65.0 MB. Free memory was 47.7 MB in the beginning and 42.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:01,480 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.64 ms. Allocated memory is still 65.0 MB. Free memory was 42.0 MB in the beginning and 40.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:01,480 INFO L168 Benchmark]: Boogie Preprocessor took 14.52 ms. Allocated memory is still 65.0 MB. Free memory was 40.3 MB in the beginning and 39.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:11:01,480 INFO L168 Benchmark]: RCFGBuilder took 415.67 ms. Allocated memory is still 65.0 MB. Free memory was 39.0 MB in the beginning and 38.9 MB in the end (delta: 149.0 kB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:01,480 INFO L168 Benchmark]: TraceAbstraction took 307471.66 ms. Allocated memory was 65.0 MB in the beginning and 285.2 MB in the end (delta: 220.2 MB). Free memory was 38.6 MB in the beginning and 88.1 MB in the end (delta: -49.5 MB). Peak memory consumption was 171.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:01,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 48.2 MB. Free memory was 30.0 MB in the beginning and 30.0 MB in the end (delta: 36.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 255.72 ms. Allocated memory is still 65.0 MB. Free memory was 47.7 MB in the beginning and 42.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.64 ms. Allocated memory is still 65.0 MB. Free memory was 42.0 MB in the beginning and 40.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.52 ms. Allocated memory is still 65.0 MB. Free memory was 40.3 MB in the beginning and 39.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 415.67 ms. Allocated memory is still 65.0 MB. Free memory was 39.0 MB in the beginning and 38.9 MB in the end (delta: 149.0 kB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 307471.66 ms. Allocated memory was 65.0 MB in the beginning and 285.2 MB in the end (delta: 220.2 MB). Free memory was 38.6 MB in the beginning and 88.1 MB in the end (delta: -49.5 MB). Peak memory consumption was 171.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:310) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:11:03,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:11:03,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:11:03,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:11:03,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:11:03,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:11:03,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:11:03,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:11:03,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:11:03,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:11:03,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:11:03,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:11:03,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:11:03,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:11:03,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:11:03,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:11:03,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:11:03,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:11:03,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:11:03,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:11:03,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:11:03,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:11:03,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:11:03,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:11:03,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:11:03,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:11:03,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:11:03,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:11:03,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:11:03,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:11:03,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:11:03,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:11:03,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:11:03,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:11:03,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:11:03,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:11:03,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:11:03,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:11:03,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:11:03,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:11:03,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:11:03,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 02:11:03,568 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:11:03,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:11:03,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:11:03,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:11:03,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:11:03,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:11:03,571 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:11:03,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:11:03,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:11:03,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:11:03,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:11:03,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:11:03,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:11:03,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:11:03,573 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 02:11:03,573 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 02:11:03,574 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:11:03,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:11:03,574 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:11:03,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:11:03,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:11:03,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:11:03,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:11:03,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:11:03,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:11:03,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:11:03,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:11:03,575 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 02:11:03,575 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 02:11:03,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:11:03,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:11:03,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 02:11:03,576 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2021-08-26 02:11:03,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:11:03,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:11:03,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:11:03,860 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:11:03,860 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:11:03,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-08-26 02:11:03,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215fea13c/10b3b299fa9249c1ac507225321ed09a/FLAGe822ed8fc [2021-08-26 02:11:04,285 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:11:04,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-08-26 02:11:04,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215fea13c/10b3b299fa9249c1ac507225321ed09a/FLAGe822ed8fc [2021-08-26 02:11:04,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215fea13c/10b3b299fa9249c1ac507225321ed09a [2021-08-26 02:11:04,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:11:04,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:11:04,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:11:04,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:11:04,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:11:04,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:11:04" (1/1) ... [2021-08-26 02:11:04,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@786758ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:11:04, skipping insertion in model container [2021-08-26 02:11:04,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:11:04" (1/1) ... [2021-08-26 02:11:04,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:11:04,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:11:04,901 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/list-properties/simple_built_from_end.i[23125,23138] [2021-08-26 02:11:04,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:11:04,911 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:11:04,944 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/list-properties/simple_built_from_end.i[23125,23138] [2021-08-26 02:11:04,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:11:04,967 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:11:04,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:11:04 WrapperNode [2021-08-26 02:11:04,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:11:04,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:11:04,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:11:04,969 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:11:04,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:11:04" (1/1) ... [2021-08-26 02:11:04,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:11:04" (1/1) ... [2021-08-26 02:11:05,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:11:05,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:11:05,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:11:05,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:11:05,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:11:04" (1/1) ... [2021-08-26 02:11:05,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:11:04" (1/1) ... [2021-08-26 02:11:05,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:11:04" (1/1) ... [2021-08-26 02:11:05,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:11:04" (1/1) ... [2021-08-26 02:11:05,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:11:04" (1/1) ... [2021-08-26 02:11:05,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:11:04" (1/1) ... [2021-08-26 02:11:05,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:11:04" (1/1) ... [2021-08-26 02:11:05,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:11:05,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:11:05,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:11:05,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:11:05,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:11:04" (1/1) ... [2021-08-26 02:11:05,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:11:05,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:11:05,115 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 02:11:05,117 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 02:11:05,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-26 02:11:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:11:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:11:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:11:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:11:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-26 02:11:05,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 02:11:05,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:11:05,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:11:05,340 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:11:05,340 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-26 02:11:05,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:11:05 BoogieIcfgContainer [2021-08-26 02:11:05,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:11:05,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:11:05,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:11:05,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:11:05,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:11:04" (1/3) ... [2021-08-26 02:11:05,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51eb6d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:11:05, skipping insertion in model container [2021-08-26 02:11:05,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:11:04" (2/3) ... [2021-08-26 02:11:05,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51eb6d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:11:05, skipping insertion in model container [2021-08-26 02:11:05,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:11:05" (3/3) ... [2021-08-26 02:11:05,346 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-08-26 02:11:05,349 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:11:05,349 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 02:11:05,388 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:11:05,396 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 02:11:05,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 02:11:05,404 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 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 02:11:05,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 02:11:05,408 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:11:05,409 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 02:11:05,409 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:11:05,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:11:05,413 INFO L82 PathProgramCache]: Analyzing trace with hash 890006222, now seen corresponding path program 1 times [2021-08-26 02:11:05,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:11:05,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069023388] [2021-08-26 02:11:05,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:11:05,439 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:11:05,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:11:05,449 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:11:05,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-26 02:11:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:11:05,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-26 02:11:05,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:11:05,539 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 02:11:05,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:11:05,559 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 02:11:05,560 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:11:05,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069023388] [2021-08-26 02:11:05,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069023388] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:11:05,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:11:05,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-26 02:11:05,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320754246] [2021-08-26 02:11:05,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:11:05,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:11:05,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:11:05,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:11:05,575 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:11:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:11:05,583 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-08-26 02:11:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:11:05,584 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-26 02:11:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:11:05,588 INFO L225 Difference]: With dead ends: 22 [2021-08-26 02:11:05,589 INFO L226 Difference]: Without dead ends: 10 [2021-08-26 02:11:05,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:11:05,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-26 02:11:05,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-26 02:11:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 02:11:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-08-26 02:11:05,608 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-08-26 02:11:05,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:11:05,609 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-08-26 02:11:05,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:11:05,609 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-08-26 02:11:05,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 02:11:05,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:11:05,610 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 02:11:05,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-26 02:11:05,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:11:05,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:11:05,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:11:05,827 INFO L82 PathProgramCache]: Analyzing trace with hash 889648730, now seen corresponding path program 1 times [2021-08-26 02:11:05,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:11:05,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584160421] [2021-08-26 02:11:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:11:05,828 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:11:05,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:11:05,829 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:11:05,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-26 02:11:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:11:05,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 02:11:05,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:11:05,970 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 02:11:05,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:11:06,013 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 02:11:06,014 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:11:06,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584160421] [2021-08-26 02:11:06,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584160421] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:11:06,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:11:06,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-26 02:11:06,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683409059] [2021-08-26 02:11:06,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:11:06,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:11:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:11:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:11:06,019 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:11:06,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:11:06,045 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-08-26 02:11:06,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:11:06,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-26 02:11:06,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:11:06,046 INFO L225 Difference]: With dead ends: 19 [2021-08-26 02:11:06,046 INFO L226 Difference]: Without dead ends: 13 [2021-08-26 02:11:06,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:11:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-26 02:11:06,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2021-08-26 02:11:06,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 02:11:06,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-08-26 02:11:06,052 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-08-26 02:11:06,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:11:06,053 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-08-26 02:11:06,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:11:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-08-26 02:11:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 02:11:06,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:11:06,054 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:11:06,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-26 02:11:06,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:11:06,263 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:11:06,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:11:06,265 INFO L82 PathProgramCache]: Analyzing trace with hash 671286241, now seen corresponding path program 1 times [2021-08-26 02:11:06,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:11:06,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349243826] [2021-08-26 02:11:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:11:06,268 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:11:06,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:11:06,269 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:11:06,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-26 02:11:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:11:06,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 02:11:06,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:11:06,372 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-26 02:11:06,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2021-08-26 02:11:06,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:11:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:11:06,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:11:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:11:06,433 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:11:06,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349243826] [2021-08-26 02:11:06,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349243826] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:11:06,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:11:06,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-26 02:11:06,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408038045] [2021-08-26 02:11:06,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:11:06,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:11:06,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:11:06,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:11:06,435 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 02:11:06,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:11:06,472 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-08-26 02:11:06,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:11:06,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 02:11:06,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:11:06,473 INFO L225 Difference]: With dead ends: 18 [2021-08-26 02:11:06,473 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 02:11:06,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:11:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 02:11:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-08-26 02:11:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 02:11:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-08-26 02:11:06,476 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-08-26 02:11:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:11:06,476 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-08-26 02:11:06,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 02:11:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-08-26 02:11:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 02:11:06,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:11:06,477 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:11:06,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-26 02:11:06,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:11:06,686 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:11:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:11:06,686 INFO L82 PathProgramCache]: Analyzing trace with hash 925471903, now seen corresponding path program 1 times [2021-08-26 02:11:06,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:11:06,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051753378] [2021-08-26 02:11:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:11:06,687 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:11:06,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:11:06,688 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:11:06,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-26 02:11:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:11:06,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 02:11:06,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:11:06,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:11:06,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-26 02:11:06,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-08-26 02:11:06,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-08-26 02:11:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:11:06,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:11:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:11:06,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:11:06,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051753378] [2021-08-26 02:11:06,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051753378] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 02:11:06,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:11:06,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-26 02:11:06,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093625817] [2021-08-26 02:11:06,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:11:06,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:11:06,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:11:06,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:11:06,943 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 02:11:06,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:11:06,996 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-08-26 02:11:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:11:06,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-08-26 02:11:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:11:06,997 INFO L225 Difference]: With dead ends: 27 [2021-08-26 02:11:06,997 INFO L226 Difference]: Without dead ends: 18 [2021-08-26 02:11:06,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:11:06,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-26 02:11:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-08-26 02:11:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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 02:11:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-08-26 02:11:06,999 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-08-26 02:11:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:11:06,999 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-08-26 02:11:06,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 02:11:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-08-26 02:11:06,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 02:11:06,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:11:07,000 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:11:07,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-26 02:11:07,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:11:07,207 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:11:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:11:07,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1819205402, now seen corresponding path program 2 times [2021-08-26 02:11:07,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:11:07,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679698640] [2021-08-26 02:11:07,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:11:07,208 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:11:07,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:11:07,210 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:11:07,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-26 02:11:07,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:11:07,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:11:07,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 02:11:07,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:11:07,324 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 18 treesize of output 7 [2021-08-26 02:11:07,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-08-26 02:11:07,392 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-08-26 02:11:07,392 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 1 case distinctions, treesize of input 30 treesize of output 22 [2021-08-26 02:11:07,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:11:07,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-08-26 02:11:07,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-26 02:11:07,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:11:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:11:07,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:11:09,666 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))) is different from false [2021-08-26 02:11:11,685 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))) is different from false [2021-08-26 02:11:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-08-26 02:11:11,733 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:11:11,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679698640] [2021-08-26 02:11:11,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679698640] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 02:11:11,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:11:11,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-26 02:11:11,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28394195] [2021-08-26 02:11:11,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 02:11:11,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:11:11,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 02:11:11,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=115, Unknown=2, NotChecked=46, Total=210 [2021-08-26 02:11:11,735 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 02:11:13,789 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) is different from false [2021-08-26 02:11:15,794 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset (_ bv1 32)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32)))) is different from false [2021-08-26 02:11:17,815 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)) (_ bv1 32)) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (= (select (select (store |c_#memory_int| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_int| ULTIMATE.start_main_~t~0.base) (_ bv0 32) (_ bv1 32)) (_ bv4 32) v_DerPreprocessor_1)) c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset) (_ bv1 32))) (= (_ bv1 32) (select (select |c_#memory_int| (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32))) (_ bv0 32))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32))) is different from false [2021-08-26 02:11:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:11:17,858 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-08-26 02:11:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 02:11:17,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 02:11:17,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:11:17,861 INFO L225 Difference]: With dead ends: 22 [2021-08-26 02:11:17,861 INFO L226 Difference]: Without dead ends: 20 [2021-08-26 02:11:17,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 10179.9ms TimeCoverageRelationStatistics Valid=59, Invalid=138, Unknown=5, NotChecked=140, Total=342 [2021-08-26 02:11:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-26 02:11:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-08-26 02:11:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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 02:11:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-08-26 02:11:17,863 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-08-26 02:11:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:11:17,863 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-08-26 02:11:17,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 02:11:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-08-26 02:11:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 02:11:17,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:11:17,864 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-08-26 02:11:17,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-26 02:11:18,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:11:18,065 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:11:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:11:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2045993606, now seen corresponding path program 3 times [2021-08-26 02:11:18,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:11:18,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617013653] [2021-08-26 02:11:18,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:11:18,066 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:11:18,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:11:18,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:11:18,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-26 02:11:18,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 02:11:18,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:11:18,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 02:11:18,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:11:18,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:11:18,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:11:18,326 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 18 treesize of output 7 [2021-08-26 02:11:18,364 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:11:18,364 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 1 case distinctions, treesize of input 55 treesize of output 62 [2021-08-26 02:11:18,381 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-08-26 02:11:18,381 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 1 case distinctions, treesize of input 45 treesize of output 48 [2021-08-26 02:11:20,792 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-08-26 02:11:20,793 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 59 [2021-08-26 02:11:20,808 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-26 02:11:20,808 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 40 [2021-08-26 02:11:20,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-08-26 02:11:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:11:20,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:11:21,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 376 treesize of output 337 [2021-08-26 02:11:23,553 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (let ((.cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_5) .cse2 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse3)) (.cse1 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_7) .cse2 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse3))) (or (and (= ULTIMATE.start_main_~t~0.base .cse0) (= c_ULTIMATE.start_main_~t~0.offset .cse1)) (and (= .cse0 (_ bv0 32)) (= .cse1 (_ bv0 32))))))) is different from false [2021-08-26 02:11:25,797 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_5) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse2)) (.cse1 (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_7) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse2) (_ bv0 32)))) (or (and (= ULTIMATE.start_main_~t~0.base .cse0) .cse1) (and (= .cse0 (_ bv0 32)) .cse1))))) is different from false [2021-08-26 02:11:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-08-26 02:11:26,200 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:11:26,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617013653] [2021-08-26 02:11:26,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617013653] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 02:11:26,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:11:26,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-26 02:11:26,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008119988] [2021-08-26 02:11:26,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 02:11:26,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:11:26,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 02:11:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=144, Unknown=3, NotChecked=50, Total=240 [2021-08-26 02:11:26,202 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:11:28,360 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (let ((.cse2 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_5) (_ bv4 32) c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse2)) (.cse1 (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) (_ bv0 32) v_DerPreprocessor_7) (_ bv4 32) c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse2) (_ bv0 32)))) (or (and (= ULTIMATE.start_main_~t~0.base .cse0) .cse1) (and (= .cse0 (_ bv0 32)) .cse1))))) (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)) (exists ((v_ULTIMATE.start_main_~p~0.base_24 (_ BitVec 32))) (and (= (select (select |c_#memory_int| v_ULTIMATE.start_main_~p~0.base_24) (_ bv0 32)) (_ bv1 32)) (or (= c_ULTIMATE.start_main_~p~0.base (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.base v_ULTIMATE.start_main_~p~0.base_24)))) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32))) is different from false [2021-08-26 02:11:30,379 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (ULTIMATE.start_main_~t~0.base (_ BitVec 32))) (let ((.cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~t~0.offset)) (.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_5) .cse2 c_ULTIMATE.start_main_~p~0.base)) c_ULTIMATE.start_main_~p~0.base) .cse3)) (.cse1 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base (store (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_main_~t~0.base) c_ULTIMATE.start_main_~t~0.offset v_DerPreprocessor_7) .cse2 c_ULTIMATE.start_main_~p~0.offset)) c_ULTIMATE.start_main_~p~0.base) .cse3))) (or (and (= ULTIMATE.start_main_~t~0.base .cse0) (= c_ULTIMATE.start_main_~t~0.offset .cse1)) (and (= .cse0 (_ bv0 32)) (= .cse1 (_ bv0 32))))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) (_ bv4 32)) (_ bv0 32))) is different from false [2021-08-26 02:11:30,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:11:30,717 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-08-26 02:11:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 02:11:30,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 02:11:30,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:11:30,718 INFO L225 Difference]: With dead ends: 35 [2021-08-26 02:11:30,718 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 02:11:30,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 10462.8ms TimeCoverageRelationStatistics Valid=66, Invalid=217, Unknown=5, NotChecked=132, Total=420 [2021-08-26 02:11:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 02:11:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-08-26 02:11:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 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 02:11:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-08-26 02:11:30,722 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2021-08-26 02:11:30,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:11:30,722 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-08-26 02:11:30,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:11:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-08-26 02:11:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 02:11:30,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:11:30,723 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-08-26 02:11:30,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-26 02:11:30,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:11:30,923 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:11:30,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:11:30,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1985144934, now seen corresponding path program 4 times [2021-08-26 02:11:30,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:11:30,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777207227] [2021-08-26 02:11:30,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:11:30,924 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:11:30,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:11:30,926 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:11:30,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-26 02:11:31,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:11:31,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:11:31,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 02:11:31,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:11:31,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:11:31,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:11:31,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:11:31,232 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:11:31,232 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 14 treesize of output 14 [2021-08-26 02:11:31,321 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:11:31,324 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 1 case distinctions, treesize of input 59 treesize of output 62 [2021-08-26 02:11:31,328 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 57 treesize of output 45 [2021-08-26 02:11:31,339 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-08-26 02:11:31,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-08-26 02:11:31,549 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-26 02:11:31,550 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 44 [2021-08-26 02:11:31,561 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-26 02:11:31,561 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-08-26 02:11:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:11:31,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:11:36,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:11:36,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777207227] [2021-08-26 02:11:36,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:11:36,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [17889051] [2021-08-26 02:11:36,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:11:36,071 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-26 02:11:36,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-26 02:11:36,100 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-26 02:11:36,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-08-26 02:11:36,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:11:36,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:11:36,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 02:11:36,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:11:36,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:11:36,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:11:36,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:11:36,445 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:11:36,446 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 14 treesize of output 14 [2021-08-26 02:11:36,515 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:11:36,515 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 1 case distinctions, treesize of input 59 treesize of output 62 [2021-08-26 02:11:36,518 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 57 treesize of output 45 [2021-08-26 02:11:36,528 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-08-26 02:11:36,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-08-26 02:11:36,703 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-26 02:11:36,703 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 44 [2021-08-26 02:11:36,716 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-26 02:11:36,716 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-08-26 02:11:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:11:36,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:11:43,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:11:43,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708045596] [2021-08-26 02:11:43,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:11:43,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:11:43,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:11:43,221 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:11:43,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 02:11:43,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:11:43,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:11:43,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 02:11:43,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:11:43,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 02:11:43,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:11:43,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 02:11:43,530 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:11:43,531 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 16 treesize of output 16 [2021-08-26 02:11:43,599 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:11:43,599 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 1 case distinctions, treesize of input 59 treesize of output 62 [2021-08-26 02:11:43,615 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-08-26 02:11:43,616 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 1 case distinctions, treesize of input 45 treesize of output 48 [2021-08-26 02:11:43,823 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-26 02:11:43,824 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 44 [2021-08-26 02:11:43,838 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-26 02:11:43,838 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 25 [2021-08-26 02:11:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:11:43,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:11:50,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:11:50,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:11:50,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-26 02:11:50,161 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-26 02:11:50,161 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-26 02:11:50,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:11:50,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-08-26 02:11:50,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-26 02:11:50,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 02:11:50,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:11:50,786 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 02:11:50,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:11:50 BoogieIcfgContainer [2021-08-26 02:11:50,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 02:11:50,795 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 02:11:50,795 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 02:11:50,796 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 02:11:50,796 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:11:05" (3/4) ... [2021-08-26 02:11:50,798 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 02:11:50,798 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 02:11:50,799 INFO L168 Benchmark]: Toolchain (without parser) took 46141.44 ms. Allocated memory was 60.8 MB in the beginning and 94.4 MB in the end (delta: 33.6 MB). Free memory was 44.4 MB in the beginning and 30.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 47.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:50,799 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 46.1 MB. Free memory was 28.7 MB in the beginning and 28.6 MB in the end (delta: 53.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:11:50,799 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.16 ms. Allocated memory is still 60.8 MB. Free memory was 44.3 MB in the beginning and 37.1 MB in the end (delta: 7.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:50,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.73 ms. Allocated memory is still 60.8 MB. Free memory was 37.1 MB in the beginning and 35.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:50,800 INFO L168 Benchmark]: Boogie Preprocessor took 33.01 ms. Allocated memory is still 60.8 MB. Free memory was 35.4 MB in the beginning and 33.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:50,800 INFO L168 Benchmark]: RCFGBuilder took 298.84 ms. Allocated memory is still 60.8 MB. Free memory was 33.8 MB in the beginning and 31.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:50,800 INFO L168 Benchmark]: TraceAbstraction took 45452.70 ms. Allocated memory was 60.8 MB in the beginning and 94.4 MB in the end (delta: 33.6 MB). Free memory was 31.1 MB in the beginning and 30.3 MB in the end (delta: 717.1 kB). Peak memory consumption was 32.9 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:50,800 INFO L168 Benchmark]: Witness Printer took 2.86 ms. Allocated memory is still 94.4 MB. Free memory is still 30.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:11:50,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 46.1 MB. Free memory was 28.7 MB in the beginning and 28.6 MB in the end (delta: 53.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 309.16 ms. Allocated memory is still 60.8 MB. Free memory was 44.3 MB in the beginning and 37.1 MB in the end (delta: 7.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.73 ms. Allocated memory is still 60.8 MB. Free memory was 37.1 MB in the beginning and 35.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.01 ms. Allocated memory is still 60.8 MB. Free memory was 35.4 MB in the beginning and 33.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 298.84 ms. Allocated memory is still 60.8 MB. Free memory was 33.8 MB in the beginning and 31.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 45452.70 ms. Allocated memory was 60.8 MB in the beginning and 94.4 MB in the end (delta: 33.6 MB). Free memory was 31.1 MB in the beginning and 30.3 MB in the end (delta: 717.1 kB). Peak memory consumption was 32.9 MB. Max. memory is 16.1 GB. * Witness Printer took 2.86 ms. Allocated memory is still 94.4 MB. Free memory is still 30.3 MB. There was no memory consumed. 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 - UnprovableResult [Line: 543]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L532] List t; [L533] List p = 0; [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND TRUE p->h != 1 [L543] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 45398.8ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 8.1ms, AutomataDifference: 10792.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 60 SDtfs, 29 SDslu, 103 SDs, 0 SdLazy, 163 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 461.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 20675.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=6, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23.9ms AutomataMinimizationTime, 6 MinimizatonAttempts, 16 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 55.7ms SsaConstructionTime, 130.9ms SatisfiabilityAnalysisTime, 12924.3ms InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 120 ConstructedInterpolants, 10 QuantifiedInterpolants, 1938 SizeOfPredicates, 36 NumberOfNonLiveVariables, 260 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 11/46 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 could not prove your program: unable to determine feasibility of some traces [2021-08-26 02:11:50,836 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 0 Received shutdown request...