./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f4f8d80cea57f4ac8bbf94d87a3cb718fa99fcd4 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-ext3-properties/dll_circular_traversal-2.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 f4f8d80cea57f4ac8bbf94d87a3cb718fa99fcd4 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 02:52:09,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:52:09,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:52:09,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:52:09,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:52:09,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:52:09,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:52:09,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:52:09,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:52:09,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:52:09,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:52:09,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:52:09,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:52:09,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:52:09,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:52:09,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:52:09,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:52:09,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:52:09,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:52:09,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:52:09,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:52:09,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:52:09,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:52:09,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:52:09,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:52:09,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:52:09,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:52:09,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:52:09,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:52:09,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:52:09,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:52:09,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:52:09,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:52:09,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:52:09,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:52:09,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:52:09,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:52:09,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:52:09,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:52:09,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:52:09,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:52:09,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 02:52:10,024 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:52:10,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:52:10,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:52:10,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:52:10,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:52:10,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:52:10,027 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:52:10,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:52:10,028 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:52:10,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 02:52:10,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:52:10,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:52:10,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:52:10,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:52:10,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:52:10,029 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:52:10,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:52:10,030 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:52:10,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:52:10,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:52:10,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:52:10,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:52:10,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:52:10,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:52:10,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:52:10,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:52:10,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 02:52:10,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 02:52:10,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:52:10,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:52:10,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4f8d80cea57f4ac8bbf94d87a3cb718fa99fcd4 [2021-08-26 02:52:10,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:52:10,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:52:10,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:52:10,408 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:52:10,409 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:52:10,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2021-08-26 02:52:10,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04d347be9/fb4275b848ff4065aa83fbd46950d0e0/FLAGfd969f486 [2021-08-26 02:52:10,871 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:52:10,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2021-08-26 02:52:10,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04d347be9/fb4275b848ff4065aa83fbd46950d0e0/FLAGfd969f486 [2021-08-26 02:52:11,264 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04d347be9/fb4275b848ff4065aa83fbd46950d0e0 [2021-08-26 02:52:11,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:52:11,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:52:11,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:52:11,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:52:11,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:52:11,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:52:11" (1/1) ... [2021-08-26 02:52:11,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3740729d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:52:11, skipping insertion in model container [2021-08-26 02:52:11,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:52:11" (1/1) ... [2021-08-26 02:52:11,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:52:11,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:52:11,607 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-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2021-08-26 02:52:11,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:52:11,621 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:52:11,662 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-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2021-08-26 02:52:11,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:52:11,695 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:52:11,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:52:11 WrapperNode [2021-08-26 02:52:11,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:52:11,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:52:11,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:52:11,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:52:11,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:52:11" (1/1) ... [2021-08-26 02:52:11,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:52:11" (1/1) ... [2021-08-26 02:52:11,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:52:11,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:52:11,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:52:11,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:52:11,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:52:11" (1/1) ... [2021-08-26 02:52:11,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:52:11" (1/1) ... [2021-08-26 02:52:11,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:52:11" (1/1) ... [2021-08-26 02:52:11,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:52:11" (1/1) ... [2021-08-26 02:52:11,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:52:11" (1/1) ... [2021-08-26 02:52:11,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:52:11" (1/1) ... [2021-08-26 02:52:11,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:52:11" (1/1) ... [2021-08-26 02:52:11,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:52:11,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:52:11,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:52:11,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:52:11,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:52:11" (1/1) ... [2021-08-26 02:52:11,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:52:11,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:52:11,838 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 02:52:11,867 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 02:52:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 02:52:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 02:52:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:52:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:52:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:52:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:52:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:52:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 02:52:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:52:11,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:52:12,252 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:52:12,252 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-26 02:52:12,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:52:12 BoogieIcfgContainer [2021-08-26 02:52:12,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:52:12,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:52:12,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:52:12,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:52:12,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:52:11" (1/3) ... [2021-08-26 02:52:12,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2729745a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:52:12, skipping insertion in model container [2021-08-26 02:52:12,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:52:11" (2/3) ... [2021-08-26 02:52:12,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2729745a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:52:12, skipping insertion in model container [2021-08-26 02:52:12,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:52:12" (3/3) ... [2021-08-26 02:52:12,261 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2021-08-26 02:52:12,265 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:52:12,265 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 02:52:12,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:52:12,306 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 02:52:12,306 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 02:52:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:52:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 02:52:12,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:52:12,322 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:52:12,323 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:52:12,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:52:12,327 INFO L82 PathProgramCache]: Analyzing trace with hash 742134712, now seen corresponding path program 1 times [2021-08-26 02:52:12,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:52:12,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785823348] [2021-08-26 02:52:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:52:12,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:52:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:52:12,488 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 02:52:12,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:52:12,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785823348] [2021-08-26 02:52:12,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785823348] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:52:12,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:52:12,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 02:52:12,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517235230] [2021-08-26 02:52:12,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:52:12,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:52:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:52:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:52:12,508 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:52:12,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:52:12,536 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2021-08-26 02:52:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:52:12,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-26 02:52:12,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:52:12,542 INFO L225 Difference]: With dead ends: 43 [2021-08-26 02:52:12,543 INFO L226 Difference]: Without dead ends: 21 [2021-08-26 02:52:12,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:52:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-26 02:52:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-08-26 02:52:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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 02:52:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-08-26 02:52:12,565 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2021-08-26 02:52:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:52:12,566 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-08-26 02:52:12,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:52:12,566 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-08-26 02:52:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 02:52:12,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:52:12,567 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:52:12,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 02:52:12,567 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:52:12,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:52:12,569 INFO L82 PathProgramCache]: Analyzing trace with hash -60440637, now seen corresponding path program 1 times [2021-08-26 02:52:12,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:52:12,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660220305] [2021-08-26 02:52:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:52:12,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:52:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:52:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:52:12,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:52:12,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660220305] [2021-08-26 02:52:12,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660220305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:12,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855329985] [2021-08-26 02:52:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:52:12,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:52:12,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:52:12,679 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 02:52:12,685 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 02:52:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:52:12,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 02:52:12,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:52:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:52:12,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855329985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:12,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:52:12,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-26 02:52:12,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279858878] [2021-08-26 02:52:12,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:52:12,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:52:12,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:52:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:52:12,932 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 02:52:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:52:12,978 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-08-26 02:52:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:52:12,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) Word has length 13 [2021-08-26 02:52:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:52:12,982 INFO L225 Difference]: With dead ends: 35 [2021-08-26 02:52:12,982 INFO L226 Difference]: Without dead ends: 24 [2021-08-26 02:52:12,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:52:12,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-26 02:52:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-08-26 02:52:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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 02:52:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-08-26 02:52:12,989 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2021-08-26 02:52:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:52:12,990 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-08-26 02:52:12,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 02:52:12,991 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-08-26 02:52:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 02:52:12,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:52:12,993 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:52:13,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 02:52:13,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:52:13,194 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:52:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:52:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash 500274136, now seen corresponding path program 2 times [2021-08-26 02:52:13,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:52:13,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416513440] [2021-08-26 02:52:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:52:13,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:52:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:52:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:52:13,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:52:13,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416513440] [2021-08-26 02:52:13,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416513440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:13,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961517447] [2021-08-26 02:52:13,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:52:13,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:52:13,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:52:13,295 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 02:52:13,297 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 02:52:13,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:52:13,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:52:13,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 02:52:13,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:52:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:52:13,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961517447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:13,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:52:13,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-26 02:52:13,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380890323] [2021-08-26 02:52:13,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 02:52:13,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:52:13,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 02:52:13,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:52:13,557 INFO L87 Difference]: Start difference. First operand 22 states and 25 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 02:52:13,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:52:13,595 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-08-26 02:52:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:52:13,596 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 16 [2021-08-26 02:52:13,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:52:13,597 INFO L225 Difference]: With dead ends: 38 [2021-08-26 02:52:13,597 INFO L226 Difference]: Without dead ends: 27 [2021-08-26 02:52:13,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:52:13,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-26 02:52:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-08-26 02:52:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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 02:52:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-08-26 02:52:13,605 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-08-26 02:52:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:52:13,605 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-26 02:52:13,606 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 02:52:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-08-26 02:52:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 02:52:13,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:52:13,607 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:52:13,630 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 02:52:13,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 02:52:13,829 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:52:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:52:13,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1626262435, now seen corresponding path program 3 times [2021-08-26 02:52:13,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:52:13,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613269405] [2021-08-26 02:52:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:52:13,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:52:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:52:13,945 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 02:52:13,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:52:13,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613269405] [2021-08-26 02:52:13,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613269405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:13,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369052170] [2021-08-26 02:52:13,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:52:13,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:52:13,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:52:13,947 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 02:52:13,960 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 02:52:14,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 02:52:14,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:52:14,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 02:52:14,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:52:14,844 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 02:52:14,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369052170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:14,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:52:14,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-26 02:52:14,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580645509] [2021-08-26 02:52:14,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 02:52:14,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:52:14,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 02:52:14,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:52:14,846 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 02:52:14,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:52:14,879 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-08-26 02:52:14,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:52:14,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 19 [2021-08-26 02:52:14,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:52:14,885 INFO L225 Difference]: With dead ends: 39 [2021-08-26 02:52:14,885 INFO L226 Difference]: Without dead ends: 28 [2021-08-26 02:52:14,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:52:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-26 02:52:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-26 02:52:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:52:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-08-26 02:52:14,888 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2021-08-26 02:52:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:52:14,889 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-08-26 02:52:14,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 02:52:14,889 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-08-26 02:52:14,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 02:52:14,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:52:14,890 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:52:14,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-26 02:52:15,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:52:15,097 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:52:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:52:15,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2045871112, now seen corresponding path program 4 times [2021-08-26 02:52:15,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:52:15,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503576719] [2021-08-26 02:52:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:52:15,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:52:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:52:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 02:52:15,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:52:15,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503576719] [2021-08-26 02:52:15,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503576719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:15,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809313175] [2021-08-26 02:52:15,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:52:15,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:52:15,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:52:15,381 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 02:52:15,382 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 02:52:29,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:52:29,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:52:29,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-26 02:52:29,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:52:29,328 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 02:52:29,433 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:52:29,439 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 02:52:29,535 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-26 02:52:29,536 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 40 treesize of output 12 [2021-08-26 02:52:29,602 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 38 treesize of output 26 [2021-08-26 02:52:29,606 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 23 treesize of output 11 [2021-08-26 02:52:29,688 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 02:52:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 02:52:29,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809313175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:29,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:52:29,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-26 02:52:29,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864928938] [2021-08-26 02:52:29,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 02:52:29,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:52:29,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 02:52:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-26 02:52:29,712 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:52:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:52:30,110 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-08-26 02:52:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 02:52:30,110 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-26 02:52:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:52:30,111 INFO L225 Difference]: With dead ends: 36 [2021-08-26 02:52:30,111 INFO L226 Difference]: Without dead ends: 34 [2021-08-26 02:52:30,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 405.5ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-08-26 02:52:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-26 02:52:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-08-26 02:52:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:52:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-08-26 02:52:30,114 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2021-08-26 02:52:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:52:30,115 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-08-26 02:52:30,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:52:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-08-26 02:52:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 02:52:30,115 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:52:30,116 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:52:30,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-26 02:52:30,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:52:30,337 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:52:30,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:52:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1335739081, now seen corresponding path program 1 times [2021-08-26 02:52:30,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:52:30,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529518834] [2021-08-26 02:52:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:52:30,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:52:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:52:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:52:30,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:52:30,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529518834] [2021-08-26 02:52:30,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529518834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:30,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242336770] [2021-08-26 02:52:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:52:30,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:52:30,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:52:30,809 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 02:52:30,840 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 02:52:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:52:30,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 68 conjunts are in the unsatisfiable core [2021-08-26 02:52:30,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:52:30,991 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 02:52:31,066 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:52:31,067 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 02:52:31,244 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-08-26 02:52:31,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 26 treesize of output 37 [2021-08-26 02:52:31,501 INFO L354 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2021-08-26 02:52:31,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 35 treesize of output 53 [2021-08-26 02:52:31,713 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-26 02:52:31,713 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 1 case distinctions, treesize of input 66 treesize of output 38 [2021-08-26 02:52:31,907 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-08-26 02:52:31,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 52 [2021-08-26 02:52:32,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:32,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:32,043 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:52:32,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 97 [2021-08-26 02:52:32,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:32,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2021-08-26 02:52:32,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:32,056 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 73 [2021-08-26 02:52:32,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:32,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 83 [2021-08-26 02:52:32,253 INFO L354 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2021-08-26 02:52:32,254 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 4 case distinctions, treesize of input 164 treesize of output 155 [2021-08-26 02:52:32,298 INFO L354 Elim1Store]: treesize reduction 142, result has 18.4 percent of original size [2021-08-26 02:52:32,298 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 4 case distinctions, treesize of input 163 treesize of output 139 [2021-08-26 02:52:32,330 INFO L354 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2021-08-26 02:52:32,331 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 4 case distinctions, treesize of input 120 treesize of output 94 [2021-08-26 02:52:32,648 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-08-26 02:52:32,648 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 2 case distinctions, treesize of input 161 treesize of output 163 [2021-08-26 02:52:32,681 INFO L354 Elim1Store]: treesize reduction 109, result has 10.7 percent of original size [2021-08-26 02:52:32,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 154 treesize of output 133 [2021-08-26 02:52:32,694 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-26 02:52:32,694 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 127 treesize of output 107 [2021-08-26 02:52:32,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:32,715 INFO L354 Elim1Store]: treesize reduction 70, result has 10.3 percent of original size [2021-08-26 02:52:32,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 73 [2021-08-26 02:52:32,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:32,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:32,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:32,724 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-08-26 02:52:32,818 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 02:52:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:52:32,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242336770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:32,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:52:32,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-26 02:52:32,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399902212] [2021-08-26 02:52:32,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-26 02:52:32,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:52:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-26 02:52:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-08-26 02:52:32,852 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 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 02:52:34,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:52:34,763 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-08-26 02:52:34,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 02:52:34,763 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 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) Word has length 25 [2021-08-26 02:52:34,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:52:34,764 INFO L225 Difference]: With dead ends: 43 [2021-08-26 02:52:34,764 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 02:52:34,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2074.6ms TimeCoverageRelationStatistics Valid=359, Invalid=1447, Unknown=0, NotChecked=0, Total=1806 [2021-08-26 02:52:34,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 02:52:34,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-08-26 02:52:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:52:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-08-26 02:52:34,775 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 25 [2021-08-26 02:52:34,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:52:34,775 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-08-26 02:52:34,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 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 02:52:34,778 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-08-26 02:52:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:52:34,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:52:34,780 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:52:34,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-26 02:52:35,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:52:35,005 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:52:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:52:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash 132103768, now seen corresponding path program 2 times [2021-08-26 02:52:35,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:52:35,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130319725] [2021-08-26 02:52:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:52:35,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:52:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:52:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:52:35,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:52:35,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130319725] [2021-08-26 02:52:35,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130319725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:35,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426268687] [2021-08-26 02:52:35,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:52:35,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:52:35,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:52:35,876 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 02:52:35,876 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 02:52:36,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:52:36,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:52:36,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 90 conjunts are in the unsatisfiable core [2021-08-26 02:52:36,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:52:36,120 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 02:52:36,204 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:52:36,205 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 02:52:36,369 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:52:36,371 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 22 treesize of output 33 [2021-08-26 02:52:36,517 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-26 02:52:36,517 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 1 case distinctions, treesize of input 49 treesize of output 21 [2021-08-26 02:52:36,675 INFO L354 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2021-08-26 02:52:36,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 35 treesize of output 53 [2021-08-26 02:52:36,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:36,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:36,943 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:52:36,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 119 [2021-08-26 02:52:36,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:36,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 96 [2021-08-26 02:52:36,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:36,955 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 95 [2021-08-26 02:52:36,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:36,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:36,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 117 [2021-08-26 02:52:37,203 INFO L354 Elim1Store]: treesize reduction 46, result has 33.3 percent of original size [2021-08-26 02:52:37,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 56 [2021-08-26 02:52:37,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:37,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:37,460 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-08-26 02:52:37,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 183 treesize of output 164 [2021-08-26 02:52:37,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:37,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:37,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:37,482 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:52:37,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 149 treesize of output 127 [2021-08-26 02:52:37,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:37,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:37,507 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:52:37,508 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 158 treesize of output 126 [2021-08-26 02:52:37,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:37,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:37,535 INFO L354 Elim1Store]: treesize reduction 84, result has 24.3 percent of original size [2021-08-26 02:52:37,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 204 treesize of output 188 [2021-08-26 02:52:37,846 INFO L354 Elim1Store]: treesize reduction 204, result has 15.0 percent of original size [2021-08-26 02:52:37,846 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 11 case distinctions, treesize of input 366 treesize of output 238 [2021-08-26 02:52:37,932 INFO L354 Elim1Store]: treesize reduction 328, result has 14.6 percent of original size [2021-08-26 02:52:37,932 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 11 case distinctions, treesize of input 530 treesize of output 280 [2021-08-26 02:52:37,958 INFO L354 Elim1Store]: treesize reduction 135, result has 7.5 percent of original size [2021-08-26 02:52:37,959 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 4 case distinctions, treesize of input 326 treesize of output 290 [2021-08-26 02:52:37,992 INFO L354 Elim1Store]: treesize reduction 242, result has 13.6 percent of original size [2021-08-26 02:52:37,993 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 281 treesize of output 263 [2021-08-26 02:52:38,703 INFO L354 Elim1Store]: treesize reduction 368, result has 13.0 percent of original size [2021-08-26 02:52:38,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 273 treesize of output 200 [2021-08-26 02:52:38,786 INFO L354 Elim1Store]: treesize reduction 320, result has 13.7 percent of original size [2021-08-26 02:52:38,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 200 treesize of output 181 [2021-08-26 02:52:38,811 INFO L354 Elim1Store]: treesize reduction 115, result has 14.2 percent of original size [2021-08-26 02:52:38,811 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 158 treesize of output 156 [2021-08-26 02:52:39,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:39,280 INFO L354 Elim1Store]: treesize reduction 401, result has 10.3 percent of original size [2021-08-26 02:52:39,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 298 treesize of output 228 [2021-08-26 02:52:39,324 INFO L354 Elim1Store]: treesize reduction 141, result has 12.4 percent of original size [2021-08-26 02:52:39,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 260 treesize of output 164 [2021-08-26 02:52:39,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:39,390 INFO L354 Elim1Store]: treesize reduction 253, result has 17.0 percent of original size [2021-08-26 02:52:39,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 140 treesize of output 142 [2021-08-26 02:52:39,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:39,441 INFO L354 Elim1Store]: treesize reduction 139, result has 4.8 percent of original size [2021-08-26 02:52:39,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 82 [2021-08-26 02:52:39,463 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:52:39,463 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 2 case distinctions, treesize of input 41 treesize of output 36 [2021-08-26 02:52:39,564 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 02:52:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:52:39,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426268687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:39,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:52:39,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-08-26 02:52:39,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255408422] [2021-08-26 02:52:39,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-26 02:52:39,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:52:39,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-26 02:52:39,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-08-26 02:52:39,597 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 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 02:52:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:52:44,871 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-08-26 02:52:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 02:52:44,872 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 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 02:52:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:52:44,872 INFO L225 Difference]: With dead ends: 48 [2021-08-26 02:52:44,873 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 02:52:44,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 4421.1ms TimeCoverageRelationStatistics Valid=480, Invalid=2068, Unknown=2, NotChecked=0, Total=2550 [2021-08-26 02:52:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 02:52:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-08-26 02:52:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 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 02:52:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-08-26 02:52:44,881 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-08-26 02:52:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:52:44,881 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-08-26 02:52:44,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 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 02:52:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-08-26 02:52:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 02:52:44,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:52:44,882 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:52:44,907 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 02:52:45,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:52:45,096 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:52:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:52:45,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1314448489, now seen corresponding path program 3 times [2021-08-26 02:52:45,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:52:45,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940172784] [2021-08-26 02:52:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:52:45,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:52:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:52:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:52:46,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:52:46,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940172784] [2021-08-26 02:52:46,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940172784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:46,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722927182] [2021-08-26 02:52:46,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:52:46,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:52:46,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:52:46,242 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 02:52:46,265 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 02:52:51,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-26 02:52:51,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:52:51,938 WARN L261 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 105 conjunts are in the unsatisfiable core [2021-08-26 02:52:51,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:52:51,956 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 02:52:52,082 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:52:52,083 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 02:52:52,211 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 35 treesize of output 7 [2021-08-26 02:52:52,305 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:52:52,306 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 22 treesize of output 33 [2021-08-26 02:52:52,505 INFO L354 Elim1Store]: treesize reduction 150, result has 13.8 percent of original size [2021-08-26 02:52:52,505 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 3 case distinctions, treesize of input 124 treesize of output 102 [2021-08-26 02:52:52,517 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-08-26 02:52:52,517 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 1 case distinctions, treesize of input 90 treesize of output 79 [2021-08-26 02:52:52,529 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-26 02:52:52,530 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 78 [2021-08-26 02:52:52,558 INFO L354 Elim1Store]: treesize reduction 114, result has 13.0 percent of original size [2021-08-26 02:52:52,558 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 2 case distinctions, treesize of input 114 treesize of output 94 [2021-08-26 02:52:52,709 INFO L354 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2021-08-26 02:52:52,710 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 33 treesize of output 57 [2021-08-26 02:52:53,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:53,077 INFO L354 Elim1Store]: treesize reduction 285, result has 11.5 percent of original size [2021-08-26 02:52:53,078 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 5 case distinctions, treesize of input 221 treesize of output 198 [2021-08-26 02:52:53,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:53,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:53,109 INFO L354 Elim1Store]: treesize reduction 91, result has 9.0 percent of original size [2021-08-26 02:52:53,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 183 treesize of output 145 [2021-08-26 02:52:53,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:53,157 INFO L354 Elim1Store]: treesize reduction 162, result has 15.6 percent of original size [2021-08-26 02:52:53,157 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 197 treesize of output 161 [2021-08-26 02:52:53,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:53,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:53,183 INFO L354 Elim1Store]: treesize reduction 123, result has 9.6 percent of original size [2021-08-26 02:52:53,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 209 treesize of output 187 [2021-08-26 02:52:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:53,213 INFO L354 Elim1Store]: treesize reduction 138, result has 17.9 percent of original size [2021-08-26 02:52:53,213 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 313 treesize of output 255 [2021-08-26 02:52:53,487 INFO L354 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2021-08-26 02:52:53,487 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 50 treesize of output 56 [2021-08-26 02:52:53,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:53,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:53,809 INFO L354 Elim1Store]: treesize reduction 316, result has 9.7 percent of original size [2021-08-26 02:52:53,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 437 treesize of output 268 [2021-08-26 02:52:53,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:53,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:53,863 INFO L354 Elim1Store]: treesize reduction 156, result has 12.4 percent of original size [2021-08-26 02:52:53,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 711 treesize of output 273 [2021-08-26 02:52:53,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:53,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:53,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:53,973 INFO L354 Elim1Store]: treesize reduction 406, result has 10.6 percent of original size [2021-08-26 02:52:53,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 701 treesize of output 561 [2021-08-26 02:52:53,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:53,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:54,044 INFO L354 Elim1Store]: treesize reduction 330, result has 11.3 percent of original size [2021-08-26 02:52:54,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 690 treesize of output 554 [2021-08-26 02:52:54,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:54,074 INFO L354 Elim1Store]: treesize reduction 231, result has 10.5 percent of original size [2021-08-26 02:52:54,074 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 4 case distinctions, treesize of input 680 treesize of output 550 [2021-08-26 02:52:54,121 INFO L354 Elim1Store]: treesize reduction 486, result has 13.2 percent of original size [2021-08-26 02:52:54,121 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 541 treesize of output 508 [2021-08-26 02:52:54,564 INFO L354 Elim1Store]: treesize reduction 292, result has 12.8 percent of original size [2021-08-26 02:52:54,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 475 treesize of output 265 [2021-08-26 02:52:54,590 INFO L354 Elim1Store]: treesize reduction 275, result has 7.7 percent of original size [2021-08-26 02:52:54,590 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 7 case distinctions, treesize of input 503 treesize of output 488 [2021-08-26 02:52:54,678 INFO L354 Elim1Store]: treesize reduction 548, result has 10.9 percent of original size [2021-08-26 02:52:54,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 476 treesize of output 398 [2021-08-26 02:52:54,702 INFO L354 Elim1Store]: treesize reduction 227, result has 7.7 percent of original size [2021-08-26 02:52:54,703 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 7 case distinctions, treesize of input 414 treesize of output 411 [2021-08-26 02:52:55,290 INFO L354 Elim1Store]: treesize reduction 376, result has 6.7 percent of original size [2021-08-26 02:52:55,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 29 case distinctions, treesize of input 398 treesize of output 239 [2021-08-26 02:52:55,329 INFO L354 Elim1Store]: treesize reduction 188, result has 15.3 percent of original size [2021-08-26 02:52:55,330 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 9 case distinctions, treesize of input 275 treesize of output 276 [2021-08-26 02:52:55,389 INFO L354 Elim1Store]: treesize reduction 376, result has 5.8 percent of original size [2021-08-26 02:52:55,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 257 treesize of output 252 [2021-08-26 02:52:55,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:55,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:56,074 INFO L354 Elim1Store]: treesize reduction 803, result has 8.4 percent of original size [2021-08-26 02:52:56,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 45 case distinctions, treesize of input 403 treesize of output 308 [2021-08-26 02:52:56,109 INFO L354 Elim1Store]: treesize reduction 257, result has 10.1 percent of original size [2021-08-26 02:52:56,109 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 426 treesize of output 412 [2021-08-26 02:52:56,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:56,251 INFO L354 Elim1Store]: treesize reduction 929, result has 9.5 percent of original size [2021-08-26 02:52:56,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 384 treesize of output 368 [2021-08-26 02:52:56,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:56,768 INFO L354 Elim1Store]: treesize reduction 570, result has 11.1 percent of original size [2021-08-26 02:52:56,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 528 treesize of output 286 [2021-08-26 02:52:56,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:52:56,860 INFO L354 Elim1Store]: treesize reduction 367, result has 6.1 percent of original size [2021-08-26 02:52:56,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 463 treesize of output 216 [2021-08-26 02:52:56,879 INFO L354 Elim1Store]: treesize reduction 96, result has 6.8 percent of original size [2021-08-26 02:52:56,879 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 177 treesize of output 168 [2021-08-26 02:52:56,899 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-08-26 02:52:56,900 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 135 treesize of output 109 [2021-08-26 02:52:56,919 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-26 02:52:56,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 88 treesize of output 73 [2021-08-26 02:52:56,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:52:56,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2021-08-26 02:52:56,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2021-08-26 02:52:56,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-08-26 02:52:57,053 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 02:52:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:52:57,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722927182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:52:57,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:52:57,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-08-26 02:52:57,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686041686] [2021-08-26 02:52:57,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-26 02:52:57,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:52:57,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-26 02:52:57,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-08-26 02:52:57,097 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 37 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 02:53:05,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:53:05,903 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-08-26 02:53:05,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 02:53:05,903 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 37 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 31 [2021-08-26 02:53:05,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:53:05,904 INFO L225 Difference]: With dead ends: 51 [2021-08-26 02:53:05,904 INFO L226 Difference]: Without dead ends: 45 [2021-08-26 02:53:05,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 9325.8ms TimeCoverageRelationStatistics Valid=378, Invalid=2484, Unknown=0, NotChecked=0, Total=2862 [2021-08-26 02:53:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-26 02:53:05,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-08-26 02:53:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 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 02:53:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-26 02:53:05,912 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2021-08-26 02:53:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:53:05,913 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-26 02:53:05,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 37 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 02:53:05,913 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-26 02:53:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 02:53:05,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:53:05,915 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:53:05,942 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 02:53:06,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:53:06,129 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:53:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:53:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1519237304, now seen corresponding path program 4 times [2021-08-26 02:53:06,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:53:06,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761039833] [2021-08-26 02:53:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:53:06,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:53:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:53:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:53:07,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:53:07,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761039833] [2021-08-26 02:53:07,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761039833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:53:07,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821859915] [2021-08-26 02:53:07,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:53:07,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:53:07,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:53:07,962 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 02:53:07,963 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 02:53:11,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:53:11,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:53:11,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 137 conjunts are in the unsatisfiable core [2021-08-26 02:53:11,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:53:11,528 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 02:53:11,603 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 02:53:11,694 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:53:11,694 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 02:53:11,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:11,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:11,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-08-26 02:53:11,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:11,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2021-08-26 02:53:11,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:11,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2021-08-26 02:53:11,849 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 23 treesize of output 22 [2021-08-26 02:53:11,963 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:53:11,963 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 22 treesize of output 33 [2021-08-26 02:53:12,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,194 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-08-26 02:53:12,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 201 [2021-08-26 02:53:12,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,209 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:53:12,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 186 treesize of output 124 [2021-08-26 02:53:12,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:12,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:12,223 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-08-26 02:53:12,223 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 175 treesize of output 123 [2021-08-26 02:53:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:12,245 INFO L354 Elim1Store]: treesize reduction 64, result has 26.4 percent of original size [2021-08-26 02:53:12,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 157 [2021-08-26 02:53:12,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,418 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-08-26 02:53:12,418 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 27 treesize of output 31 [2021-08-26 02:53:12,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,730 INFO L354 Elim1Store]: treesize reduction 136, result has 18.6 percent of original size [2021-08-26 02:53:12,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 347 treesize of output 301 [2021-08-26 02:53:12,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:12,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:12,753 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-08-26 02:53:12,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 283 treesize of output 164 [2021-08-26 02:53:12,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:12,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:12,786 INFO L354 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2021-08-26 02:53:12,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 236 treesize of output 163 [2021-08-26 02:53:12,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:12,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:12,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:12,835 INFO L354 Elim1Store]: treesize reduction 210, result has 20.2 percent of original size [2021-08-26 02:53:12,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 264 treesize of output 252 [2021-08-26 02:53:13,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:13,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:13,376 INFO L354 Elim1Store]: treesize reduction 292, result has 16.8 percent of original size [2021-08-26 02:53:13,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 473 treesize of output 418 [2021-08-26 02:53:13,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:13,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:13,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:13,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:13,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:13,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:13,450 INFO L354 Elim1Store]: treesize reduction 80, result has 32.2 percent of original size [2021-08-26 02:53:13,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 397 treesize of output 217 [2021-08-26 02:53:13,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:13,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:13,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:13,504 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-08-26 02:53:13,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 24 case distinctions, treesize of input 456 treesize of output 216 [2021-08-26 02:53:13,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:13,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:13,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:13,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:13,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:13,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:13,590 INFO L354 Elim1Store]: treesize reduction 460, result has 16.5 percent of original size [2021-08-26 02:53:13,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 444 treesize of output 434 [2021-08-26 02:53:14,141 INFO L354 Elim1Store]: treesize reduction 192, result has 31.7 percent of original size [2021-08-26 02:53:14,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 439 treesize of output 299 [2021-08-26 02:53:14,232 INFO L354 Elim1Store]: treesize reduction 280, result has 17.9 percent of original size [2021-08-26 02:53:14,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 336 treesize of output 335 [2021-08-26 02:53:14,249 INFO L354 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2021-08-26 02:53:14,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 316 treesize of output 295 [2021-08-26 02:53:25,024 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-08-26 02:53:25,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 3 disjoint index pairs (out of 91 index pairs), introduced 19 new quantified variables, introduced 90 case distinctions, treesize of input 637 treesize of output 399 [2021-08-26 02:53:25,160 INFO L354 Elim1Store]: treesize reduction 600, result has 11.6 percent of original size [2021-08-26 02:53:25,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 33 case distinctions, treesize of input 622 treesize of output 613 [2021-08-26 02:53:25,242 INFO L354 Elim1Store]: treesize reduction 768, result has 0.1 percent of original size [2021-08-26 02:53:25,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 3 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 87 case distinctions, treesize of input 604 treesize of output 607 [2021-08-26 02:53:30,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:30,398 INFO L354 Elim1Store]: treesize reduction 882, result has 10.1 percent of original size [2021-08-26 02:53:30,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 19 new quantified variables, introduced 91 case distinctions, treesize of input 763 treesize of output 457 [2021-08-26 02:53:30,504 INFO L354 Elim1Store]: treesize reduction 710, result has 12.2 percent of original size [2021-08-26 02:53:30,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 844 treesize of output 832 [2021-08-26 02:53:30,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:30,799 INFO L354 Elim1Store]: treesize reduction 1555, result has 9.3 percent of original size [2021-08-26 02:53:30,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 828 treesize of output 750 [2021-08-26 02:53:31,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:31,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:32,133 INFO L354 Elim1Store]: treesize reduction 836, result has 8.3 percent of original size [2021-08-26 02:53:32,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 859 treesize of output 421 [2021-08-26 02:53:32,197 INFO L354 Elim1Store]: treesize reduction 755, result has 7.2 percent of original size [2021-08-26 02:53:32,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 698 treesize of output 668 [2021-08-26 02:53:32,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:32,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:32,434 INFO L354 Elim1Store]: treesize reduction 1511, result has 9.3 percent of original size [2021-08-26 02:53:32,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 14 new quantified variables, introduced 78 case distinctions, treesize of input 656 treesize of output 558 [2021-08-26 02:53:33,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:33,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:33,572 INFO L354 Elim1Store]: treesize reduction 790, result has 8.8 percent of original size [2021-08-26 02:53:33,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 66 case distinctions, treesize of input 1114 treesize of output 497 [2021-08-26 02:53:33,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:53:33,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:33,698 INFO L354 Elim1Store]: treesize reduction 259, result has 5.8 percent of original size [2021-08-26 02:53:33,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 55 case distinctions, treesize of input 725 treesize of output 363 [2021-08-26 02:53:33,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:53:33,999 INFO L354 Elim1Store]: treesize reduction 823, result has 9.3 percent of original size [2021-08-26 02:53:33,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 16 new quantified variables, introduced 91 case distinctions, treesize of input 304 treesize of output 230 [2021-08-26 02:53:34,053 INFO L354 Elim1Store]: treesize reduction 204, result has 13.9 percent of original size [2021-08-26 02:53:34,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 164 treesize of output 156 [2021-08-26 02:53:34,089 INFO L354 Elim1Store]: treesize reduction 232, result has 0.4 percent of original size [2021-08-26 02:53:34,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 153 treesize of output 104 [2021-08-26 02:53:34,509 INFO L354 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2021-08-26 02:53:34,509 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 65 treesize of output 65 [2021-08-26 02:53:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:53:34,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821859915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:53:34,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:53:34,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2021-08-26 02:53:34,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829980631] [2021-08-26 02:53:34,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-26 02:53:34,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:53:34,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-26 02:53:34,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1854, Unknown=0, NotChecked=0, Total=2070 [2021-08-26 02:53:34,588 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 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 02:53:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:53:49,169 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2021-08-26 02:53:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-26 02:53:49,170 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 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 34 [2021-08-26 02:53:49,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:53:49,171 INFO L225 Difference]: With dead ends: 84 [2021-08-26 02:53:49,171 INFO L226 Difference]: Without dead ends: 78 [2021-08-26 02:53:49,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 16715.3ms TimeCoverageRelationStatistics Valid=747, Invalid=5105, Unknown=0, NotChecked=0, Total=5852 [2021-08-26 02:53:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-26 02:53:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2021-08-26 02:53:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 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 02:53:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-08-26 02:53:49,183 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 34 [2021-08-26 02:53:49,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:53:49,183 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-08-26 02:53:49,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 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 02:53:49,184 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-08-26 02:53:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 02:53:49,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:53:49,185 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:53:49,206 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 02:53:49,388 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,SelfDestructingSolverStorable8 [2021-08-26 02:53:49,389 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:53:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:53:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1585007677, now seen corresponding path program 5 times [2021-08-26 02:53:49,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:53:49,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711722747] [2021-08-26 02:53:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:53:49,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:53:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:53:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-26 02:53:49,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:53:49,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711722747] [2021-08-26 02:53:49,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711722747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:53:49,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128187662] [2021-08-26 02:53:49,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 02:53:49,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:53:49,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:53:49,469 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 02:53:49,470 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 02:54:03,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-26 02:54:03,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:54:03,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 02:54:03,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:54:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-26 02:54:03,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128187662] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:54:03,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 02:54:03,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-08-26 02:54:03,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351857392] [2021-08-26 02:54:03,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 02:54:03,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:54:03,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 02:54:03,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-26 02:54:03,904 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 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 02:54:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:54:03,939 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2021-08-26 02:54:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 02:54:03,939 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-26 02:54:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:54:03,940 INFO L225 Difference]: With dead ends: 79 [2021-08-26 02:54:03,940 INFO L226 Difference]: Without dead ends: 54 [2021-08-26 02:54:03,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-26 02:54:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-26 02:54:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-26 02:54:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 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 02:54:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-08-26 02:54:03,950 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 37 [2021-08-26 02:54:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:54:03,951 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-08-26 02:54:03,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 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 02:54:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-08-26 02:54:03,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 02:54:03,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:54:03,952 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:54:03,987 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 02:54:04,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-26 02:54:04,177 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:54:04,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:54:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2031636557, now seen corresponding path program 1 times [2021-08-26 02:54:04,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:54:04,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374639034] [2021-08-26 02:54:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:54:04,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:54:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:54:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:54:05,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:54:05,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374639034] [2021-08-26 02:54:05,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374639034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:54:05,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957279359] [2021-08-26 02:54:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:54:05,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:54:05,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:54:05,972 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 02:54:05,975 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 02:54:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:54:06,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 118 conjunts are in the unsatisfiable core [2021-08-26 02:54:06,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:54:06,874 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 02:54:06,922 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:54:06,922 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 02:54:06,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:06,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 21 [2021-08-26 02:54:06,994 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 21 treesize of output 20 [2021-08-26 02:54:07,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-08-26 02:54:07,095 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:54:07,097 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 22 treesize of output 33 [2021-08-26 02:54:07,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:07,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,256 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:54:07,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 99 [2021-08-26 02:54:07,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:07,269 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:54:07,270 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 98 [2021-08-26 02:54:07,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:07,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,290 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-08-26 02:54:07,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 126 [2021-08-26 02:54:07,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,435 INFO L354 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2021-08-26 02:54:07,435 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 33 treesize of output 57 [2021-08-26 02:54:07,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:07,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,691 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-08-26 02:54:07,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 162 treesize of output 142 [2021-08-26 02:54:07,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:07,728 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-08-26 02:54:07,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 220 treesize of output 141 [2021-08-26 02:54:07,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:07,764 INFO L354 Elim1Store]: treesize reduction 208, result has 20.9 percent of original size [2021-08-26 02:54:07,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 234 treesize of output 226 [2021-08-26 02:54:07,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:07,946 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-26 02:54:07,946 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 42 treesize of output 48 [2021-08-26 02:54:08,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:08,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:08,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:08,215 INFO L354 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2021-08-26 02:54:08,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 225 treesize of output 174 [2021-08-26 02:54:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:08,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:08,256 INFO L354 Elim1Store]: treesize reduction 120, result has 15.5 percent of original size [2021-08-26 02:54:08,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 23 case distinctions, treesize of input 325 treesize of output 173 [2021-08-26 02:54:08,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:08,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:08,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:08,332 INFO L354 Elim1Store]: treesize reduction 450, result has 17.7 percent of original size [2021-08-26 02:54:08,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 321 treesize of output 319 [2021-08-26 02:54:08,638 INFO L354 Elim1Store]: treesize reduction 224, result has 20.3 percent of original size [2021-08-26 02:54:08,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 455 treesize of output 186 [2021-08-26 02:54:08,728 INFO L354 Elim1Store]: treesize reduction 736, result has 14.1 percent of original size [2021-08-26 02:54:08,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 394 treesize of output 357 [2021-08-26 02:54:09,147 INFO L354 Elim1Store]: treesize reduction 480, result has 0.2 percent of original size [2021-08-26 02:54:09,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 44 case distinctions, treesize of input 343 treesize of output 358 [2021-08-26 02:54:09,183 INFO L354 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2021-08-26 02:54:09,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 44 case distinctions, treesize of input 328 treesize of output 175 [2021-08-26 02:54:09,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:09,724 INFO L354 Elim1Store]: treesize reduction 711, result has 9.7 percent of original size [2021-08-26 02:54:09,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 385 treesize of output 263 [2021-08-26 02:54:09,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:09,898 INFO L354 Elim1Store]: treesize reduction 1367, result has 11.2 percent of original size [2021-08-26 02:54:09,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 438 treesize of output 442 [2021-08-26 02:54:10,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:10,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:10,513 INFO L354 Elim1Store]: treesize reduction 836, result has 8.3 percent of original size [2021-08-26 02:54:10,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 66 case distinctions, treesize of input 653 treesize of output 304 [2021-08-26 02:54:10,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:10,708 INFO L354 Elim1Store]: treesize reduction 1430, result has 9.1 percent of original size [2021-08-26 02:54:10,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 438 treesize of output 393 [2021-08-26 02:54:11,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:11,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:11,191 INFO L354 Elim1Store]: treesize reduction 470, result has 13.4 percent of original size [2021-08-26 02:54:11,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 55 case distinctions, treesize of input 527 treesize of output 250 [2021-08-26 02:54:11,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:11,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:11,339 INFO L354 Elim1Store]: treesize reduction 998, result has 11.4 percent of original size [2021-08-26 02:54:11,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 388 treesize of output 353 [2021-08-26 02:54:11,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:11,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:11,828 INFO L354 Elim1Store]: treesize reduction 486, result has 13.1 percent of original size [2021-08-26 02:54:11,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 16 new quantified variables, introduced 55 case distinctions, treesize of input 458 treesize of output 244 [2021-08-26 02:54:11,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 350 treesize of output 338 [2021-08-26 02:54:11,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:11,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:11,963 INFO L354 Elim1Store]: treesize reduction 998, result has 11.4 percent of original size [2021-08-26 02:54:11,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 338 treesize of output 335 [2021-08-26 02:54:12,382 INFO L354 Elim1Store]: treesize reduction 124, result has 23.0 percent of original size [2021-08-26 02:54:12,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 359 treesize of output 179 [2021-08-26 02:54:12,409 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-08-26 02:54:12,409 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 146 treesize of output 134 [2021-08-26 02:54:12,429 INFO L354 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2021-08-26 02:54:12,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 131 treesize of output 83 [2021-08-26 02:54:12,491 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 02:54:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:54:12,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957279359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:54:12,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:54:12,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 43 [2021-08-26 02:54:12,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285419435] [2021-08-26 02:54:12,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-26 02:54:12,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:54:12,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-26 02:54:12,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1664, Unknown=0, NotChecked=0, Total=1806 [2021-08-26 02:54:12,534 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 43 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 02:54:16,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:54:16,924 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2021-08-26 02:54:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 02:54:16,924 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 43 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 38 [2021-08-26 02:54:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:54:16,925 INFO L225 Difference]: With dead ends: 62 [2021-08-26 02:54:16,925 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 02:54:16,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 5317.2ms TimeCoverageRelationStatistics Valid=265, Invalid=2597, Unknown=0, NotChecked=0, Total=2862 [2021-08-26 02:54:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 02:54:16,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-26 02:54:16,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 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 02:54:16,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-08-26 02:54:16,935 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 38 [2021-08-26 02:54:16,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:54:16,935 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-08-26 02:54:16,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 43 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 02:54:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-08-26 02:54:16,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-26 02:54:16,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:54:16,937 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:54:16,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 02:54:17,152 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,SelfDestructingSolverStorable10 [2021-08-26 02:54:17,153 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:54:17,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:54:17,153 INFO L82 PathProgramCache]: Analyzing trace with hash -192741631, now seen corresponding path program 1 times [2021-08-26 02:54:17,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:54:17,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320699788] [2021-08-26 02:54:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:54:17,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:54:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:54:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:54:19,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:54:19,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320699788] [2021-08-26 02:54:19,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320699788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:54:19,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938341523] [2021-08-26 02:54:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:54:19,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:54:19,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:54:19,213 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:54:19,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 02:54:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:54:20,346 WARN L261 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 134 conjunts are in the unsatisfiable core [2021-08-26 02:54:20,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:54:20,358 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 02:54:20,405 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:54:20,406 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 02:54:20,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:20,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 21 [2021-08-26 02:54:20,465 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 21 treesize of output 20 [2021-08-26 02:54:20,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:20,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 21 [2021-08-26 02:54:20,479 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 21 treesize of output 20 [2021-08-26 02:54:20,538 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:54:20,538 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 22 treesize of output 33 [2021-08-26 02:54:20,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:20,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:20,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:20,646 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-08-26 02:54:20,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 103 [2021-08-26 02:54:20,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:20,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:20,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:20,660 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:54:20,660 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 102 [2021-08-26 02:54:20,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:20,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:20,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:20,672 INFO L354 Elim1Store]: treesize reduction 37, result has 28.8 percent of original size [2021-08-26 02:54:20,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 138 treesize of output 133 [2021-08-26 02:54:20,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:20,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:20,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:20,685 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-08-26 02:54:20,685 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 3 case distinctions, treesize of input 127 treesize of output 126 [2021-08-26 02:54:20,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:20,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:20,848 INFO L354 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2021-08-26 02:54:20,848 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 33 treesize of output 57 [2021-08-26 02:54:21,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,080 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-08-26 02:54:21,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 166 treesize of output 146 [2021-08-26 02:54:21,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,111 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-08-26 02:54:21,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 242 treesize of output 145 [2021-08-26 02:54:21,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,134 INFO L354 Elim1Store]: treesize reduction 124, result has 21.0 percent of original size [2021-08-26 02:54:21,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 232 treesize of output 233 [2021-08-26 02:54:21,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,158 INFO L354 Elim1Store]: treesize reduction 160, result has 13.5 percent of original size [2021-08-26 02:54:21,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 221 treesize of output 226 [2021-08-26 02:54:21,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,387 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-26 02:54:21,387 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 42 treesize of output 48 [2021-08-26 02:54:21,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,664 INFO L354 Elim1Store]: treesize reduction 98, result has 19.7 percent of original size [2021-08-26 02:54:21,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 229 treesize of output 178 [2021-08-26 02:54:21,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,706 INFO L354 Elim1Store]: treesize reduction 120, result has 15.5 percent of original size [2021-08-26 02:54:21,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 258 treesize of output 177 [2021-08-26 02:54:21,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,742 INFO L354 Elim1Store]: treesize reduction 296, result has 15.4 percent of original size [2021-08-26 02:54:21,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 319 treesize of output 326 [2021-08-26 02:54:21,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:21,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:21,782 INFO L354 Elim1Store]: treesize reduction 366, result has 11.2 percent of original size [2021-08-26 02:54:21,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 308 treesize of output 319 [2021-08-26 02:54:22,093 INFO L354 Elim1Store]: treesize reduction 224, result has 20.3 percent of original size [2021-08-26 02:54:22,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 455 treesize of output 186 [2021-08-26 02:54:22,183 INFO L354 Elim1Store]: treesize reduction 736, result has 14.1 percent of original size [2021-08-26 02:54:22,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 394 treesize of output 357 [2021-08-26 02:54:22,588 INFO L354 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2021-08-26 02:54:22,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 44 case distinctions, treesize of input 343 treesize of output 190 [2021-08-26 02:54:22,638 INFO L354 Elim1Store]: treesize reduction 480, result has 0.2 percent of original size [2021-08-26 02:54:22,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 40 case distinctions, treesize of input 328 treesize of output 343 [2021-08-26 02:54:23,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:23,194 INFO L354 Elim1Store]: treesize reduction 707, result has 10.2 percent of original size [2021-08-26 02:54:23,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 445 treesize of output 267 [2021-08-26 02:54:23,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:23,382 INFO L354 Elim1Store]: treesize reduction 1071, result has 10.4 percent of original size [2021-08-26 02:54:23,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 324 treesize of output 328 [2021-08-26 02:54:23,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:24,056 INFO L354 Elim1Store]: treesize reduction 933, result has 8.7 percent of original size [2021-08-26 02:54:24,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 19 new quantified variables, introduced 78 case distinctions, treesize of input 539 treesize of output 320 [2021-08-26 02:54:24,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:24,285 INFO L354 Elim1Store]: treesize reduction 1126, result has 9.9 percent of original size [2021-08-26 02:54:24,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 14 new quantified variables, introduced 66 case distinctions, treesize of input 416 treesize of output 352 [2021-08-26 02:54:24,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:24,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:24,941 INFO L354 Elim1Store]: treesize reduction 1028, result has 11.1 percent of original size [2021-08-26 02:54:24,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 14 new quantified variables, introduced 66 case distinctions, treesize of input 640 treesize of output 478 [2021-08-26 02:54:25,107 INFO L354 Elim1Store]: treesize reduction 480, result has 12.9 percent of original size [2021-08-26 02:54:25,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 16 new quantified variables, introduced 55 case distinctions, treesize of input 429 treesize of output 245 [2021-08-26 02:54:25,112 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 338 treesize of output 326 [2021-08-26 02:54:25,728 INFO L354 Elim1Store]: treesize reduction 690, result has 10.2 percent of original size [2021-08-26 02:54:25,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 673 treesize of output 309 [2021-08-26 02:54:25,745 INFO L354 Elim1Store]: treesize reduction 191, result has 12.4 percent of original size [2021-08-26 02:54:25,745 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 528 treesize of output 477 [2021-08-26 02:54:25,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:25,935 INFO L354 Elim1Store]: treesize reduction 1210, result has 9.3 percent of original size [2021-08-26 02:54:25,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 14 new quantified variables, introduced 66 case distinctions, treesize of input 530 treesize of output 380 [2021-08-26 02:54:26,423 INFO L354 Elim1Store]: treesize reduction 360, result has 9.1 percent of original size [2021-08-26 02:54:26,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 60 case distinctions, treesize of input 384 treesize of output 255 [2021-08-26 02:54:26,522 INFO L354 Elim1Store]: treesize reduction 708, result has 8.3 percent of original size [2021-08-26 02:54:26,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 50 case distinctions, treesize of input 410 treesize of output 352 [2021-08-26 02:54:26,528 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-26 02:54:26,528 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 313 treesize of output 280 [2021-08-26 02:54:26,929 INFO L354 Elim1Store]: treesize reduction 124, result has 23.0 percent of original size [2021-08-26 02:54:26,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 293 treesize of output 169 [2021-08-26 02:54:26,955 INFO L354 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2021-08-26 02:54:26,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 136 treesize of output 92 [2021-08-26 02:54:27,571 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:54:27,571 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 28 treesize of output 16 [2021-08-26 02:54:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:54:27,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938341523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:54:27,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:54:27,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 44 [2021-08-26 02:54:27,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139022458] [2021-08-26 02:54:27,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-26 02:54:27,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:54:27,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-26 02:54:27,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1736, Unknown=1, NotChecked=0, Total=1892 [2021-08-26 02:54:27,579 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:54:33,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:54:33,489 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-08-26 02:54:33,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 02:54:33,490 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-26 02:54:33,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:54:33,490 INFO L225 Difference]: With dead ends: 47 [2021-08-26 02:54:33,491 INFO L226 Difference]: Without dead ends: 45 [2021-08-26 02:54:33,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 6725.1ms TimeCoverageRelationStatistics Valid=287, Invalid=2681, Unknown=2, NotChecked=0, Total=2970 [2021-08-26 02:54:33,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-26 02:54:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-08-26 02:54:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 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 02:54:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-08-26 02:54:33,502 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 41 [2021-08-26 02:54:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:54:33,502 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-08-26 02:54:33,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 44 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:54:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-08-26 02:54:33,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-26 02:54:33,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:54:33,503 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:54:33,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 02:54:33,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-26 02:54:33,729 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:54:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:54:33,729 INFO L82 PathProgramCache]: Analyzing trace with hash 407069645, now seen corresponding path program 2 times [2021-08-26 02:54:33,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:54:33,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374577910] [2021-08-26 02:54:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:54:33,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:54:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:54:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:54:36,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:54:36,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374577910] [2021-08-26 02:54:36,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374577910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:54:36,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17588957] [2021-08-26 02:54:36,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:54:36,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:54:36,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:54:36,551 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:54:36,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 02:54:37,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:54:37,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:54:37,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 147 conjunts are in the unsatisfiable core [2021-08-26 02:54:37,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:54:37,969 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 02:54:38,087 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:54:38,087 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 02:54:38,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:38,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2021-08-26 02:54:38,210 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 23 treesize of output 22 [2021-08-26 02:54:38,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:38,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2021-08-26 02:54:38,226 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 23 treesize of output 22 [2021-08-26 02:54:38,347 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:54:38,348 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 22 treesize of output 33 [2021-08-26 02:54:38,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:38,553 INFO L354 Elim1Store]: treesize reduction 141, result has 9.6 percent of original size [2021-08-26 02:54:38,554 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 2 case distinctions, treesize of input 197 treesize of output 141 [2021-08-26 02:54:38,582 INFO L354 Elim1Store]: treesize reduction 192, result has 15.0 percent of original size [2021-08-26 02:54:38,583 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 5 case distinctions, treesize of input 186 treesize of output 140 [2021-08-26 02:54:38,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:38,626 INFO L354 Elim1Store]: treesize reduction 267, result has 12.7 percent of original size [2021-08-26 02:54:38,626 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 188 treesize of output 144 [2021-08-26 02:54:38,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:38,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:38,793 INFO L354 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2021-08-26 02:54:38,794 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 33 treesize of output 57 [2021-08-26 02:54:39,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,085 INFO L354 Elim1Store]: treesize reduction 320, result has 9.6 percent of original size [2021-08-26 02:54:39,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 194 treesize of output 174 [2021-08-26 02:54:39,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,125 INFO L354 Elim1Store]: treesize reduction 162, result has 12.9 percent of original size [2021-08-26 02:54:39,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 12 case distinctions, treesize of input 300 treesize of output 179 [2021-08-26 02:54:39,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,193 INFO L354 Elim1Store]: treesize reduction 410, result has 10.5 percent of original size [2021-08-26 02:54:39,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 290 treesize of output 247 [2021-08-26 02:54:39,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,224 INFO L354 Elim1Store]: treesize reduction 162, result has 14.3 percent of original size [2021-08-26 02:54:39,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 221 treesize of output 226 [2021-08-26 02:54:39,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,434 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-26 02:54:39,435 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 42 treesize of output 48 [2021-08-26 02:54:39,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,699 INFO L354 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2021-08-26 02:54:39,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 229 treesize of output 178 [2021-08-26 02:54:39,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,752 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-08-26 02:54:39,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 23 case distinctions, treesize of input 329 treesize of output 177 [2021-08-26 02:54:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,790 INFO L354 Elim1Store]: treesize reduction 238, result has 15.6 percent of original size [2021-08-26 02:54:39,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 279 treesize of output 286 [2021-08-26 02:54:39,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:39,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:39,856 INFO L354 Elim1Store]: treesize reduction 304, result has 11.6 percent of original size [2021-08-26 02:54:39,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 268 treesize of output 279 [2021-08-26 02:54:40,176 INFO L354 Elim1Store]: treesize reduction 224, result has 20.3 percent of original size [2021-08-26 02:54:40,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 234 treesize of output 186 [2021-08-26 02:54:40,262 INFO L354 Elim1Store]: treesize reduction 568, result has 16.1 percent of original size [2021-08-26 02:54:40,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 286 treesize of output 285 [2021-08-26 02:54:40,734 INFO L354 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2021-08-26 02:54:40,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 44 case distinctions, treesize of input 283 treesize of output 190 [2021-08-26 02:54:40,771 INFO L354 Elim1Store]: treesize reduction 352, result has 0.3 percent of original size [2021-08-26 02:54:40,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 42 case distinctions, treesize of input 247 treesize of output 262 [2021-08-26 02:54:41,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:41,370 INFO L354 Elim1Store]: treesize reduction 707, result has 10.2 percent of original size [2021-08-26 02:54:41,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 66 case distinctions, treesize of input 364 treesize of output 267 [2021-08-26 02:54:41,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:41,545 INFO L354 Elim1Store]: treesize reduction 1131, result has 10.5 percent of original size [2021-08-26 02:54:41,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 340 treesize of output 344 [2021-08-26 02:54:41,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:41,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:42,227 INFO L354 Elim1Store]: treesize reduction 945, result has 7.5 percent of original size [2021-08-26 02:54:42,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 19 new quantified variables, introduced 78 case distinctions, treesize of input 622 treesize of output 333 [2021-08-26 02:54:42,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:54:42,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:42,413 INFO L354 Elim1Store]: treesize reduction 1192, result has 10.0 percent of original size [2021-08-26 02:54:42,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 66 case distinctions, treesize of input 420 treesize of output 377 [2021-08-26 02:54:42,418 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 349 treesize of output 337 [2021-08-26 02:54:43,127 INFO L354 Elim1Store]: treesize reduction 786, result has 9.0 percent of original size [2021-08-26 02:54:43,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 870 treesize of output 430 [2021-08-26 02:54:43,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:43,419 INFO L354 Elim1Store]: treesize reduction 1646, result has 7.6 percent of original size [2021-08-26 02:54:43,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 78 case distinctions, treesize of input 778 treesize of output 494 [2021-08-26 02:54:43,458 INFO L354 Elim1Store]: treesize reduction 179, result has 16.4 percent of original size [2021-08-26 02:54:43,458 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 513 treesize of output 446 [2021-08-26 02:54:44,090 INFO L354 Elim1Store]: treesize reduction 716, result has 9.7 percent of original size [2021-08-26 02:54:44,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 78 case distinctions, treesize of input 962 treesize of output 324 [2021-08-26 02:54:44,117 INFO L354 Elim1Store]: treesize reduction 304, result has 14.4 percent of original size [2021-08-26 02:54:44,118 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 471 treesize of output 437 [2021-08-26 02:54:44,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:54:44,312 INFO L354 Elim1Store]: treesize reduction 1446, result has 8.2 percent of original size [2021-08-26 02:54:44,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 13 new quantified variables, introduced 55 case distinctions, treesize of input 431 treesize of output 380 [2021-08-26 02:54:44,829 INFO L354 Elim1Store]: treesize reduction 224, result has 11.5 percent of original size [2021-08-26 02:54:44,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 49 case distinctions, treesize of input 399 treesize of output 266 [2021-08-26 02:54:44,857 INFO L354 Elim1Store]: treesize reduction 574, result has 13.4 percent of original size [2021-08-26 02:54:44,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 660 treesize of output 606 [2021-08-26 02:54:44,987 INFO L354 Elim1Store]: treesize reduction 1480, result has 7.0 percent of original size [2021-08-26 02:54:44,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 51 case distinctions, treesize of input 597 treesize of output 446 [2021-08-26 02:54:46,149 INFO L354 Elim1Store]: treesize reduction 249, result has 11.4 percent of original size [2021-08-26 02:54:46,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 55 case distinctions, treesize of input 596 treesize of output 217 [2021-08-26 02:54:46,228 INFO L354 Elim1Store]: treesize reduction 342, result has 0.9 percent of original size [2021-08-26 02:54:46,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 13 new quantified variables, introduced 55 case distinctions, treesize of input 169 treesize of output 110 [2021-08-26 02:54:46,376 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-26 02:54:46,376 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 29 [2021-08-26 02:54:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:54:46,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17588957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:54:46,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:54:46,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 52 [2021-08-26 02:54:46,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403010819] [2021-08-26 02:54:46,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-26 02:54:46,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:54:46,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-26 02:54:46,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2500, Unknown=0, NotChecked=0, Total=2652 [2021-08-26 02:54:46,384 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 52 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 52 states have internal predecessors, (85), 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 02:55:38,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:55:38,926 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-08-26 02:55:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-26 02:55:38,927 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 52 states have internal predecessors, (85), 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 44 [2021-08-26 02:55:38,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:55:38,927 INFO L225 Difference]: With dead ends: 50 [2021-08-26 02:55:38,927 INFO L226 Difference]: Without dead ends: 48 [2021-08-26 02:55:38,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 17191.0ms TimeCoverageRelationStatistics Valid=331, Invalid=4779, Unknown=2, NotChecked=0, Total=5112 [2021-08-26 02:55:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-26 02:55:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-08-26 02:55:38,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 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 02:55:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-08-26 02:55:38,940 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 44 [2021-08-26 02:55:38,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:55:38,940 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-08-26 02:55:38,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 52 states have internal predecessors, (85), 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 02:55:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-08-26 02:55:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 02:55:38,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:55:38,941 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:55:38,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 02:55:39,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 02:55:39,154 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:55:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:55:39,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1974125695, now seen corresponding path program 3 times [2021-08-26 02:55:39,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:55:39,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706992755] [2021-08-26 02:55:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:55:39,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:55:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:55:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:55:42,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:55:42,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706992755] [2021-08-26 02:55:42,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706992755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:55:42,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622892446] [2021-08-26 02:55:42,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:55:42,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:55:42,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:55:42,968 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:55:42,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 02:56:02,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-26 02:56:02,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:56:02,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 179 conjunts are in the unsatisfiable core [2021-08-26 02:56:02,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:56:02,554 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 02:56:02,627 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 02:56:02,713 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:56:02,714 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 02:56:02,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:02,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:02,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-08-26 02:56:02,888 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 13 treesize of output 9 [2021-08-26 02:56:02,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:02,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2021-08-26 02:56:03,056 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:56:03,056 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 22 treesize of output 33 [2021-08-26 02:56:03,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:03,330 INFO L354 Elim1Store]: treesize reduction 489, result has 8.1 percent of original size [2021-08-26 02:56:03,330 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 5 case distinctions, treesize of input 277 treesize of output 224 [2021-08-26 02:56:03,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:03,364 INFO L354 Elim1Store]: treesize reduction 141, result has 9.6 percent of original size [2021-08-26 02:56:03,364 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 2 case distinctions, treesize of input 209 treesize of output 153 [2021-08-26 02:56:03,394 INFO L354 Elim1Store]: treesize reduction 192, result has 15.0 percent of original size [2021-08-26 02:56:03,394 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 5 case distinctions, treesize of input 198 treesize of output 152 [2021-08-26 02:56:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:03,421 INFO L354 Elim1Store]: treesize reduction 120, result has 17.8 percent of original size [2021-08-26 02:56:03,421 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 150 [2021-08-26 02:56:03,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:03,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:03,620 INFO L354 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2021-08-26 02:56:03,620 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 33 treesize of output 57 [2021-08-26 02:56:03,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:03,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:03,937 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-08-26 02:56:03,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 221 treesize of output 205 [2021-08-26 02:56:03,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:03,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:03,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:03,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:03,963 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-08-26 02:56:03,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 187 treesize of output 167 [2021-08-26 02:56:03,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:03,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:03,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:03,989 INFO L354 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2021-08-26 02:56:03,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 269 treesize of output 166 [2021-08-26 02:56:03,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:03,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:03,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:03,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:04,021 INFO L354 Elim1Store]: treesize reduction 152, result has 20.8 percent of original size [2021-08-26 02:56:04,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 277 treesize of output 262 [2021-08-26 02:56:04,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:04,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:04,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:04,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:04,276 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-26 02:56:04,277 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 42 treesize of output 48 [2021-08-26 02:56:04,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:04,588 INFO L354 Elim1Store]: treesize reduction 138, result has 0.7 percent of original size [2021-08-26 02:56:04,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 531 treesize of output 504 [2021-08-26 02:56:04,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:04,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:04,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:04,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:04,632 INFO L354 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2021-08-26 02:56:04,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 582 treesize of output 250 [2021-08-26 02:56:04,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:04,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:04,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:04,678 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-08-26 02:56:04,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 23 case distinctions, treesize of input 571 treesize of output 249 [2021-08-26 02:56:04,716 INFO L354 Elim1Store]: treesize reduction 276, result has 15.9 percent of original size [2021-08-26 02:56:04,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 553 treesize of output 409 [2021-08-26 02:56:04,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:04,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:04,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:04,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:04,743 INFO L354 Elim1Store]: treesize reduction 192, result has 16.9 percent of original size [2021-08-26 02:56:04,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 413 treesize of output 417 [2021-08-26 02:56:04,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:04,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:04,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:04,776 INFO L354 Elim1Store]: treesize reduction 310, result has 11.4 percent of original size [2021-08-26 02:56:04,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 402 treesize of output 402 [2021-08-26 02:56:05,186 INFO L354 Elim1Store]: treesize reduction 636, result has 14.7 percent of original size [2021-08-26 02:56:05,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 648 treesize of output 640 [2021-08-26 02:56:05,281 INFO L354 Elim1Store]: treesize reduction 224, result has 20.3 percent of original size [2021-08-26 02:56:05,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 619 treesize of output 250 [2021-08-26 02:56:05,290 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-08-26 02:56:05,290 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 10 case distinctions, treesize of input 622 treesize of output 506 [2021-08-26 02:56:05,297 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-08-26 02:56:05,297 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 10 case distinctions, treesize of input 507 treesize of output 443 [2021-08-26 02:56:05,828 INFO L354 Elim1Store]: treesize reduction 384, result has 0.3 percent of original size [2021-08-26 02:56:05,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 485 treesize of output 497 [2021-08-26 02:56:05,890 INFO L354 Elim1Store]: treesize reduction 463, result has 10.3 percent of original size [2021-08-26 02:56:05,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 470 treesize of output 410 [2021-08-26 02:56:05,910 INFO L354 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2021-08-26 02:56:05,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 431 treesize of output 218 [2021-08-26 02:56:06,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:06,546 INFO L354 Elim1Store]: treesize reduction 707, result has 10.2 percent of original size [2021-08-26 02:56:06,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 572 treesize of output 326 [2021-08-26 02:56:06,604 INFO L354 Elim1Store]: treesize reduction 509, result has 8.8 percent of original size [2021-08-26 02:56:06,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 435 treesize of output 393 [2021-08-26 02:56:06,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:06,761 INFO L354 Elim1Store]: treesize reduction 907, result has 10.6 percent of original size [2021-08-26 02:56:06,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 394 treesize of output 387 [2021-08-26 02:56:07,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:07,439 INFO L354 Elim1Store]: treesize reduction 637, result has 11.5 percent of original size [2021-08-26 02:56:07,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 19 new quantified variables, introduced 78 case distinctions, treesize of input 516 treesize of output 311 [2021-08-26 02:56:07,507 INFO L354 Elim1Store]: treesize reduction 565, result has 7.7 percent of original size [2021-08-26 02:56:07,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 471 treesize of output 439 [2021-08-26 02:56:07,609 INFO L354 Elim1Store]: treesize reduction 870, result has 11.4 percent of original size [2021-08-26 02:56:07,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 432 treesize of output 398 [2021-08-26 02:56:08,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:08,221 INFO L354 Elim1Store]: treesize reduction 486, result has 13.1 percent of original size [2021-08-26 02:56:08,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 16 new quantified variables, introduced 55 case distinctions, treesize of input 596 treesize of output 294 [2021-08-26 02:56:08,291 INFO L354 Elim1Store]: treesize reduction 815, result has 7.0 percent of original size [2021-08-26 02:56:08,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 595 treesize of output 567 [2021-08-26 02:56:08,405 INFO L354 Elim1Store]: treesize reduction 1284, result has 9.6 percent of original size [2021-08-26 02:56:08,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 552 treesize of output 482 [2021-08-26 02:56:08,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:08,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:09,066 INFO L354 Elim1Store]: treesize reduction 554, result has 13.2 percent of original size [2021-08-26 02:56:09,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 660 treesize of output 278 [2021-08-26 02:56:09,243 INFO L354 Elim1Store]: treesize reduction 980, result has 13.0 percent of original size [2021-08-26 02:56:09,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 459 treesize of output 420 [2021-08-26 02:56:09,307 INFO L354 Elim1Store]: treesize reduction 612, result has 13.1 percent of original size [2021-08-26 02:56:09,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 440 treesize of output 469 [2021-08-26 02:56:10,015 INFO L354 Elim1Store]: treesize reduction 220, result has 13.0 percent of original size [2021-08-26 02:56:10,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 49 case distinctions, treesize of input 463 treesize of output 290 [2021-08-26 02:56:10,091 INFO L354 Elim1Store]: treesize reduction 488, result has 9.8 percent of original size [2021-08-26 02:56:10,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 49 case distinctions, treesize of input 428 treesize of output 363 [2021-08-26 02:56:10,126 INFO L354 Elim1Store]: treesize reduction 413, result has 5.3 percent of original size [2021-08-26 02:56:10,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 413 treesize of output 416 [2021-08-26 02:56:19,441 INFO L354 Elim1Store]: treesize reduction 406, result has 1.7 percent of original size [2021-08-26 02:56:19,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 66 case distinctions, treesize of input 566 treesize of output 198 [2021-08-26 02:56:19,563 INFO L354 Elim1Store]: treesize reduction 390, result has 1.8 percent of original size [2021-08-26 02:56:19,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 14 new quantified variables, introduced 66 case distinctions, treesize of input 129 treesize of output 85 [2021-08-26 02:56:19,745 INFO L354 Elim1Store]: treesize reduction 40, result has 50.6 percent of original size [2021-08-26 02:56:19,746 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 43 treesize of output 59 [2021-08-26 02:56:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:56:19,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622892446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:56:19,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:56:19,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 57 [2021-08-26 02:56:19,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237158097] [2021-08-26 02:56:19,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-26 02:56:19,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:56:19,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-26 02:56:19,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3032, Unknown=3, NotChecked=0, Total=3192 [2021-08-26 02:56:19,793 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 57 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 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 02:56:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:56:39,537 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-08-26 02:56:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-26 02:56:39,537 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 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 47 [2021-08-26 02:56:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:56:39,538 INFO L225 Difference]: With dead ends: 53 [2021-08-26 02:56:39,538 INFO L226 Difference]: Without dead ends: 51 [2021-08-26 02:56:39,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 21410.1ms TimeCoverageRelationStatistics Valid=322, Invalid=5375, Unknown=3, NotChecked=0, Total=5700 [2021-08-26 02:56:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-26 02:56:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-08-26 02:56:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:56:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-08-26 02:56:39,550 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 47 [2021-08-26 02:56:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:56:39,551 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-08-26 02:56:39,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 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 02:56:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-08-26 02:56:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-26 02:56:39,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:56:39,552 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:56:39,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-26 02:56:39,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 02:56:39,761 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:56:39,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:56:39,761 INFO L82 PathProgramCache]: Analyzing trace with hash -189671603, now seen corresponding path program 4 times [2021-08-26 02:56:39,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:56:39,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415481479] [2021-08-26 02:56:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:56:39,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:56:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:56:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:56:42,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:56:42,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415481479] [2021-08-26 02:56:42,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415481479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:56:42,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377911556] [2021-08-26 02:56:42,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:56:42,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:56:42,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:56:42,933 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:56:42,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 02:56:46,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:56:46,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:56:46,925 WARN L261 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 175 conjunts are in the unsatisfiable core [2021-08-26 02:56:46,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:56:46,936 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 02:56:46,982 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:56:46,982 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 02:56:47,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2021-08-26 02:56:47,058 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 23 treesize of output 22 [2021-08-26 02:56:47,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2021-08-26 02:56:47,071 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 23 treesize of output 22 [2021-08-26 02:56:47,140 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:56:47,140 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 22 treesize of output 33 [2021-08-26 02:56:47,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:47,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,280 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-08-26 02:56:47,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 107 [2021-08-26 02:56:47,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:47,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:47,299 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-08-26 02:56:47,299 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 106 [2021-08-26 02:56:47,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:47,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:47,334 INFO L354 Elim1Store]: treesize reduction 66, result has 27.5 percent of original size [2021-08-26 02:56:47,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 134 [2021-08-26 02:56:47,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,454 INFO L354 Elim1Store]: treesize reduction 66, result has 35.3 percent of original size [2021-08-26 02:56:47,455 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 31 treesize of output 53 [2021-08-26 02:56:47,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:47,663 INFO L354 Elim1Store]: treesize reduction 352, result has 10.0 percent of original size [2021-08-26 02:56:47,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 209 treesize of output 181 [2021-08-26 02:56:47,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:47,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:47,698 INFO L354 Elim1Store]: treesize reduction 116, result has 18.3 percent of original size [2021-08-26 02:56:47,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 379 treesize of output 183 [2021-08-26 02:56:47,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:47,752 INFO L354 Elim1Store]: treesize reduction 430, result has 11.7 percent of original size [2021-08-26 02:56:47,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 363 treesize of output 285 [2021-08-26 02:56:47,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:47,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:47,793 INFO L354 Elim1Store]: treesize reduction 254, result has 11.2 percent of original size [2021-08-26 02:56:47,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 320 treesize of output 258 [2021-08-26 02:56:47,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:47,915 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-08-26 02:56:47,915 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 38 treesize of output 44 [2021-08-26 02:56:48,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:48,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:48,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:48,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:48,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:48,124 INFO L354 Elim1Store]: treesize reduction 98, result has 19.7 percent of original size [2021-08-26 02:56:48,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 273 treesize of output 206 [2021-08-26 02:56:48,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:48,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:48,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:48,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:48,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:48,206 INFO L354 Elim1Store]: treesize reduction 262, result has 18.6 percent of original size [2021-08-26 02:56:48,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 27 case distinctions, treesize of input 397 treesize of output 208 [2021-08-26 02:56:48,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:48,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:48,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:48,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:48,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:56:48,308 INFO L354 Elim1Store]: treesize reduction 796, result has 13.2 percent of original size [2021-08-26 02:56:48,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 407 treesize of output 352 [2021-08-26 02:56:48,571 INFO L354 Elim1Store]: treesize reduction 1311, result has 18.1 percent of original size [2021-08-26 02:56:48,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 1568 treesize of output 1560 [2021-08-26 02:56:48,690 INFO L354 Elim1Store]: treesize reduction 216, result has 16.0 percent of original size [2021-08-26 02:56:48,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 18 case distinctions, treesize of input 2702 treesize of output 1267 [2021-08-26 02:56:48,726 INFO L354 Elim1Store]: treesize reduction 212, result has 0.5 percent of original size [2021-08-26 02:56:48,727 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 1635 treesize of output 1535 [2021-08-26 02:56:48,792 INFO L354 Elim1Store]: treesize reduction 148, result has 12.4 percent of original size [2021-08-26 02:56:48,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 1509 treesize of output 926 [2021-08-26 02:56:48,809 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-08-26 02:56:48,810 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 1501 treesize of output 1123 [2021-08-26 02:56:48,877 INFO L354 Elim1Store]: treesize reduction 337, result has 12.5 percent of original size [2021-08-26 02:56:48,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 1226 treesize of output 1175 [2021-08-26 02:56:48,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 943 treesize of output 771 [2021-08-26 02:56:48,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1366 treesize of output 1374 [2021-08-26 02:56:48,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1362 treesize of output 1366 [2021-08-26 02:56:49,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 317 treesize of output 315 [2021-08-26 02:56:49,516 INFO L354 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2021-08-26 02:56:49,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 44 case distinctions, treesize of input 295 treesize of output 194 [2021-08-26 02:56:49,550 INFO L354 Elim1Store]: treesize reduction 384, result has 0.3 percent of original size [2021-08-26 02:56:49,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 40 case distinctions, treesize of input 280 treesize of output 283 [2021-08-26 02:56:49,594 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 02:56:49,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:50,172 INFO L354 Elim1Store]: treesize reduction 713, result has 9.4 percent of original size [2021-08-26 02:56:50,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 436 treesize of output 300 [2021-08-26 02:56:50,186 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-08-26 02:56:50,187 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 377 treesize of output 364 [2021-08-26 02:56:50,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:50,350 INFO L354 Elim1Store]: treesize reduction 1013, result has 11.8 percent of original size [2021-08-26 02:56:50,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 369 treesize of output 373 [2021-08-26 02:56:50,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:56:50,997 INFO L354 Elim1Store]: treesize reduction 1313, result has 9.2 percent of original size [2021-08-26 02:56:50,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 15 new quantified variables, introduced 78 case distinctions, treesize of input 617 treesize of output 472 [2021-08-26 02:56:51,187 INFO L354 Elim1Store]: treesize reduction 702, result has 10.7 percent of original size [2021-08-26 02:56:51,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 66 case distinctions, treesize of input 466 treesize of output 289 [2021-08-26 02:56:51,209 INFO L354 Elim1Store]: treesize reduction 184, result has 11.1 percent of original size [2021-08-26 02:56:51,209 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 393 treesize of output 369 [2021-08-26 02:56:51,916 INFO L354 Elim1Store]: treesize reduction 948, result has 8.4 percent of original size [2021-08-26 02:56:51,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 78 case distinctions, treesize of input 942 treesize of output 402 [2021-08-26 02:56:52,127 INFO L354 Elim1Store]: treesize reduction 1016, result has 9.4 percent of original size [2021-08-26 02:56:52,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 66 case distinctions, treesize of input 801 treesize of output 510 [2021-08-26 02:56:52,177 INFO L354 Elim1Store]: treesize reduction 210, result has 13.9 percent of original size [2021-08-26 02:56:52,177 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 390 treesize of output 335 [2021-08-26 02:56:52,784 INFO L354 Elim1Store]: treesize reduction 556, result has 11.7 percent of original size [2021-08-26 02:56:52,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 526 treesize of output 268 [2021-08-26 02:56:52,829 INFO L354 Elim1Store]: treesize reduction 368, result has 10.9 percent of original size [2021-08-26 02:56:52,830 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 330 treesize of output 334 [2021-08-26 02:56:52,959 INFO L354 Elim1Store]: treesize reduction 792, result has 12.3 percent of original size [2021-08-26 02:56:52,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 322 treesize of output 311 [2021-08-26 02:56:53,483 INFO L354 Elim1Store]: treesize reduction 224, result has 11.5 percent of original size [2021-08-26 02:56:53,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 13 new quantified variables, introduced 49 case distinctions, treesize of input 322 treesize of output 246 [2021-08-26 02:56:53,566 INFO L354 Elim1Store]: treesize reduction 508, result has 8.8 percent of original size [2021-08-26 02:56:53,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 49 case distinctions, treesize of input 348 treesize of output 339 [2021-08-26 02:56:53,593 INFO L354 Elim1Store]: treesize reduction 317, result has 5.7 percent of original size [2021-08-26 02:56:53,593 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 11 case distinctions, treesize of input 321 treesize of output 309 [2021-08-26 02:56:55,721 INFO L354 Elim1Store]: treesize reduction 547, result has 1.8 percent of original size [2021-08-26 02:56:55,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 23 new quantified variables, introduced 78 case distinctions, treesize of input 562 treesize of output 231 [2021-08-26 02:56:55,863 INFO L354 Elim1Store]: treesize reduction 523, result has 1.9 percent of original size [2021-08-26 02:56:55,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 16 new quantified variables, introduced 78 case distinctions, treesize of input 135 treesize of output 93 [2021-08-26 02:56:56,034 INFO L354 Elim1Store]: treesize reduction 40, result has 50.6 percent of original size [2021-08-26 02:56:56,035 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 43 treesize of output 59 [2021-08-26 02:56:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:56:56,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377911556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:56:56,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:56:56,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 49 [2021-08-26 02:56:56,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484921770] [2021-08-26 02:56:56,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-26 02:56:56,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:56:56,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-26 02:56:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2206, Unknown=0, NotChecked=0, Total=2352 [2021-08-26 02:56:56,077 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 49 states, 49 states have (on average 1.653061224489796) internal successors, (81), 49 states have internal predecessors, (81), 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 02:57:12,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:57:12,008 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-08-26 02:57:12,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-26 02:57:12,008 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.653061224489796) internal successors, (81), 49 states have internal predecessors, (81), 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 50 [2021-08-26 02:57:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:57:12,009 INFO L225 Difference]: With dead ends: 56 [2021-08-26 02:57:12,009 INFO L226 Difference]: Without dead ends: 54 [2021-08-26 02:57:12,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 9277.4ms TimeCoverageRelationStatistics Valid=248, Invalid=3291, Unknown=1, NotChecked=0, Total=3540 [2021-08-26 02:57:12,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-26 02:57:12,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-26 02:57:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 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 02:57:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-08-26 02:57:12,021 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 50 [2021-08-26 02:57:12,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:57:12,021 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-08-26 02:57:12,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.653061224489796) internal successors, (81), 49 states have internal predecessors, (81), 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 02:57:12,021 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-08-26 02:57:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-26 02:57:12,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:57:12,022 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:57:12,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 02:57:12,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:57:12,228 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:57:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:57:12,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1671960577, now seen corresponding path program 5 times [2021-08-26 02:57:12,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:57:12,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770506785] [2021-08-26 02:57:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:57:12,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:57:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:57:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:57:15,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:57:15,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770506785] [2021-08-26 02:57:15,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770506785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:57:15,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791076956] [2021-08-26 02:57:15,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 02:57:15,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:57:15,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:57:15,868 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:57:15,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 02:57:20,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-26 02:57:20,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:57:20,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 184 conjunts are in the unsatisfiable core [2021-08-26 02:57:20,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:57:20,490 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 02:57:20,610 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:57:20,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:57:20,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:20,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 23 [2021-08-26 02:57:20,714 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 23 treesize of output 22 [2021-08-26 02:57:20,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:20,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2021-08-26 02:57:20,844 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-26 02:57:20,844 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 22 treesize of output 33 [2021-08-26 02:57:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:21,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,030 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:57:21,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 159 treesize of output 103 [2021-08-26 02:57:21,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:21,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:21,045 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-08-26 02:57:21,045 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 102 [2021-08-26 02:57:21,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:21,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:21,066 INFO L354 Elim1Store]: treesize reduction 64, result has 26.4 percent of original size [2021-08-26 02:57:21,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 130 [2021-08-26 02:57:21,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,237 INFO L354 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2021-08-26 02:57:21,237 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 33 treesize of output 57 [2021-08-26 02:57:21,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:21,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:21,484 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-08-26 02:57:21,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 265 treesize of output 146 [2021-08-26 02:57:21,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:21,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:21,512 INFO L354 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2021-08-26 02:57:21,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 218 treesize of output 145 [2021-08-26 02:57:21,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:21,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:21,535 INFO L354 Elim1Store]: treesize reduction 122, result has 20.3 percent of original size [2021-08-26 02:57:21,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 232 treesize of output 233 [2021-08-26 02:57:21,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:21,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:21,558 INFO L354 Elim1Store]: treesize reduction 162, result has 14.3 percent of original size [2021-08-26 02:57:21,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 221 treesize of output 226 [2021-08-26 02:57:21,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:21,748 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-26 02:57:21,748 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 42 treesize of output 48 [2021-08-26 02:57:22,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:22,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:22,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:22,054 INFO L354 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2021-08-26 02:57:22,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 229 treesize of output 178 [2021-08-26 02:57:22,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:22,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:22,097 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-08-26 02:57:22,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 23 case distinctions, treesize of input 353 treesize of output 177 [2021-08-26 02:57:22,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:22,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:22,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:22,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:22,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:22,135 INFO L354 Elim1Store]: treesize reduction 238, result has 15.6 percent of original size [2021-08-26 02:57:22,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 279 treesize of output 286 [2021-08-26 02:57:22,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:22,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:57:22,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:22,173 INFO L354 Elim1Store]: treesize reduction 304, result has 11.6 percent of original size [2021-08-26 02:57:22,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 268 treesize of output 279 [2021-08-26 02:57:22,507 INFO L354 Elim1Store]: treesize reduction 416, result has 17.6 percent of original size [2021-08-26 02:57:22,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 234 treesize of output 245 [2021-08-26 02:57:22,591 INFO L354 Elim1Store]: treesize reduction 224, result has 20.3 percent of original size [2021-08-26 02:57:22,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 221 treesize of output 173 [2021-08-26 02:57:23,039 INFO L354 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2021-08-26 02:57:23,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 44 case distinctions, treesize of input 283 treesize of output 190 [2021-08-26 02:57:23,091 INFO L354 Elim1Store]: treesize reduction 384, result has 0.3 percent of original size [2021-08-26 02:57:23,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 40 case distinctions, treesize of input 268 treesize of output 283 [2021-08-26 02:57:23,133 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 02:57:23,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:23,732 INFO L354 Elim1Store]: treesize reduction 713, result has 9.4 percent of original size [2021-08-26 02:57:23,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 421 treesize of output 285 [2021-08-26 02:57:23,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:23,902 INFO L354 Elim1Store]: treesize reduction 1013, result has 11.8 percent of original size [2021-08-26 02:57:23,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 362 treesize of output 366 [2021-08-26 02:57:23,915 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-08-26 02:57:23,915 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 323 treesize of output 318 [2021-08-26 02:57:24,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:57:24,596 INFO L354 Elim1Store]: treesize reduction 1313, result has 9.2 percent of original size [2021-08-26 02:57:24,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 15 new quantified variables, introduced 78 case distinctions, treesize of input 596 treesize of output 451 [2021-08-26 02:57:24,728 INFO L354 Elim1Store]: treesize reduction 464, result has 13.3 percent of original size [2021-08-26 02:57:24,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 55 case distinctions, treesize of input 399 treesize of output 248 [2021-08-26 02:57:24,756 INFO L354 Elim1Store]: treesize reduction 248, result has 11.1 percent of original size [2021-08-26 02:57:24,757 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 456 treesize of output 446 [2021-08-26 02:57:25,424 INFO L354 Elim1Store]: treesize reduction 690, result has 10.2 percent of original size [2021-08-26 02:57:25,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 1063 treesize of output 343 [2021-08-26 02:57:25,627 INFO L354 Elim1Store]: treesize reduction 1542, result has 9.1 percent of original size [2021-08-26 02:57:25,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 14 new quantified variables, introduced 66 case distinctions, treesize of input 858 treesize of output 530 [2021-08-26 02:57:25,665 INFO L354 Elim1Store]: treesize reduction 556, result has 11.2 percent of original size [2021-08-26 02:57:25,665 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 535 treesize of output 502 [2021-08-26 02:57:26,342 INFO L354 Elim1Store]: treesize reduction 712, result has 10.2 percent of original size [2021-08-26 02:57:26,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 78 case distinctions, treesize of input 990 treesize of output 288 [2021-08-26 02:57:26,411 INFO L354 Elim1Store]: treesize reduction 716, result has 8.8 percent of original size [2021-08-26 02:57:26,411 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 495 treesize of output 483 [2021-08-26 02:57:26,610 INFO L354 Elim1Store]: treesize reduction 1716, result has 8.0 percent of original size [2021-08-26 02:57:26,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 471 treesize of output 435 [2021-08-26 02:57:27,184 INFO L354 Elim1Store]: treesize reduction 264, result has 9.9 percent of original size [2021-08-26 02:57:27,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 59 case distinctions, treesize of input 407 treesize of output 260 [2021-08-26 02:57:27,222 INFO L354 Elim1Store]: treesize reduction 812, result has 8.0 percent of original size [2021-08-26 02:57:27,223 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 12 case distinctions, treesize of input 549 treesize of output 501 [2021-08-26 02:57:27,309 INFO L354 Elim1Store]: treesize reduction 884, result has 5.7 percent of original size [2021-08-26 02:57:27,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 59 case distinctions, treesize of input 486 treesize of output 440 [2021-08-26 02:57:35,358 INFO L354 Elim1Store]: treesize reduction 613, result has 5.5 percent of original size [2021-08-26 02:57:35,359 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 501 treesize of output 416 [2021-08-26 02:57:36,232 INFO L354 Elim1Store]: treesize reduction 734, result has 6.3 percent of original size [2021-08-26 02:57:36,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 24 new quantified variables, introduced 91 case distinctions, treesize of input 635 treesize of output 259 [2021-08-26 02:57:36,433 INFO L354 Elim1Store]: treesize reduction 668, result has 1.9 percent of original size [2021-08-26 02:57:36,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 18 new quantified variables, introduced 91 case distinctions, treesize of input 145 treesize of output 109 [2021-08-26 02:57:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:57:36,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791076956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:57:36,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:57:36,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 56 [2021-08-26 02:57:36,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021761333] [2021-08-26 02:57:36,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-26 02:57:36,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:57:36,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-26 02:57:36,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2905, Unknown=3, NotChecked=0, Total=3080 [2021-08-26 02:57:36,452 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 56 states have internal predecessors, (101), 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 02:57:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:57:49,169 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-08-26 02:57:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-26 02:57:49,170 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 56 states have internal predecessors, (101), 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 53 [2021-08-26 02:57:49,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:57:49,170 INFO L225 Difference]: With dead ends: 55 [2021-08-26 02:57:49,171 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 02:57:49,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 17506.4ms TimeCoverageRelationStatistics Valid=312, Invalid=4655, Unknown=3, NotChecked=0, Total=4970 [2021-08-26 02:57:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 02:57:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 02:57:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 02:57:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 02:57:49,172 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2021-08-26 02:57:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:57:49,172 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 02:57:49,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 56 states have internal predecessors, (101), 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 02:57:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 02:57:49,173 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 02:57:49,175 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:57:49,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 02:57:49,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-26 02:57:49,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 02:57:49,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 02:57:49,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 02:57:49,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 02:57:49,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 02:57:49,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 02:57:49,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 02:57:49,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 02:57:49,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:00:55,527 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 101 [2021-08-26 03:00:55,528 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 03:00:55,529 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)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:174) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:239) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:231) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeIcfgHoareAnnotation(BasicCegarLoop.java:1177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop$CegarLoopResultBuilder.getResult(AbstractCegarLoop.java:831) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:350) 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:235) ... 39 more [2021-08-26 03:00:55,532 INFO L168 Benchmark]: Toolchain (without parser) took 524265.17 ms. Allocated memory was 56.6 MB in the beginning and 786.4 MB in the end (delta: 729.8 MB). Free memory was 33.2 MB in the beginning and 216.2 MB in the end (delta: -183.0 MB). Peak memory consumption was 657.9 MB. Max. memory is 16.1 GB. [2021-08-26 03:00:55,532 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 56.6 MB. Free memory was 37.9 MB in the beginning and 37.8 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:00:55,532 INFO L168 Benchmark]: CACSL2BoogieTranslator took 428.24 ms. Allocated memory is still 56.6 MB. Free memory was 33.0 MB in the beginning and 32.5 MB in the end (delta: 498.9 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:00:55,532 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.07 ms. Allocated memory is still 56.6 MB. Free memory was 32.3 MB in the beginning and 30.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:00:55,532 INFO L168 Benchmark]: Boogie Preprocessor took 50.35 ms. Allocated memory is still 56.6 MB. Free memory was 30.4 MB in the beginning and 28.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:00:55,533 INFO L168 Benchmark]: RCFGBuilder took 442.98 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 28.8 MB in the beginning and 35.2 MB in the end (delta: -6.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. [2021-08-26 03:00:55,533 INFO L168 Benchmark]: TraceAbstraction took 523276.53 ms. Allocated memory was 69.2 MB in the beginning and 786.4 MB in the end (delta: 717.2 MB). Free memory was 34.9 MB in the beginning and 216.2 MB in the end (delta: -181.3 MB). Peak memory consumption was 646.3 MB. Max. memory is 16.1 GB. [2021-08-26 03:00:55,533 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 56.6 MB. Free memory was 37.9 MB in the beginning and 37.8 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 428.24 ms. Allocated memory is still 56.6 MB. Free memory was 33.0 MB in the beginning and 32.5 MB in the end (delta: 498.9 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.07 ms. Allocated memory is still 56.6 MB. Free memory was 32.3 MB in the beginning and 30.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.35 ms. Allocated memory is still 56.6 MB. Free memory was 30.4 MB in the beginning and 28.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 442.98 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 28.8 MB in the beginning and 35.2 MB in the end (delta: -6.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 523276.53 ms. Allocated memory was 69.2 MB in the beginning and 786.4 MB in the end (delta: 717.2 MB). Free memory was 34.9 MB in the beginning and 216.2 MB in the end (delta: -181.3 MB). Peak memory consumption was 646.3 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)) Received EOF on stdin. stderr output: (error "out of memory") 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)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) 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 03:00:57,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:00:57,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:00:57,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:00:57,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:00:57,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:00:57,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:00:57,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:00:57,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:00:57,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:00:57,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:00:57,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:00:57,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:00:57,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:00:57,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:00:57,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:00:57,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:00:57,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:00:57,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:00:57,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:00:57,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:00:57,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:00:57,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:00:57,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:00:57,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:00:57,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:00:57,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:00:57,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:00:57,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:00:57,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:00:57,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:00:57,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:00:57,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:00:57,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:00:57,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:00:57,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:00:57,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:00:57,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:00:57,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:00:57,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:00:57,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:00:57,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 03:00:57,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:00:57,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:00:57,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:00:57,369 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:00:57,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:00:57,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:00:57,373 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:00:57,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:00:57,373 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:00:57,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:00:57,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:00:57,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:00:57,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:00:57,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:00:57,375 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 03:00:57,375 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 03:00:57,375 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:00:57,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:00:57,376 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:00:57,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:00:57,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:00:57,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:00:57,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:00:57,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:00:57,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:00:57,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:00:57,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:00:57,377 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 03:00:57,378 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 03:00:57,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:00:57,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:00:57,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 03:00:57,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4f8d80cea57f4ac8bbf94d87a3cb718fa99fcd4 [2021-08-26 03:00:57,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:00:57,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:00:57,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:00:57,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:00:57,740 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:00:57,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2021-08-26 03:00:57,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1b331f6/15c881e175354469985c313db93b02ec/FLAG76de4555f [2021-08-26 03:00:58,318 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:00:58,319 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2021-08-26 03:00:58,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1b331f6/15c881e175354469985c313db93b02ec/FLAG76de4555f [2021-08-26 03:00:58,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1b331f6/15c881e175354469985c313db93b02ec [2021-08-26 03:00:58,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:00:58,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:00:58,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:00:58,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:00:58,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:00:58,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:00:58" (1/1) ... [2021-08-26 03:00:58,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af6f560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:58, skipping insertion in model container [2021-08-26 03:00:58,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:00:58" (1/1) ... [2021-08-26 03:00:58,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:00:58,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:00:59,085 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-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2021-08-26 03:00:59,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:00:59,097 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:00:59,130 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-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2021-08-26 03:00:59,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:00:59,160 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:00:59,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:59 WrapperNode [2021-08-26 03:00:59,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:00:59,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:00:59,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:00:59,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:00:59,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:59" (1/1) ... [2021-08-26 03:00:59,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:59" (1/1) ... [2021-08-26 03:00:59,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:00:59,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:00:59,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:00:59,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:00:59,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:59" (1/1) ... [2021-08-26 03:00:59,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:59" (1/1) ... [2021-08-26 03:00:59,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:59" (1/1) ... [2021-08-26 03:00:59,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:59" (1/1) ... [2021-08-26 03:00:59,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:59" (1/1) ... [2021-08-26 03:00:59,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:59" (1/1) ... [2021-08-26 03:00:59,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:59" (1/1) ... [2021-08-26 03:00:59,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:00:59,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:00:59,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:00:59,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:00:59,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:59" (1/1) ... [2021-08-26 03:00:59,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:00:59,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:00:59,290 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 03:00:59,297 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 03:00:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-26 03:00:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 03:00:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 03:00:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:00:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 03:00:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 03:00:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-26 03:00:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 03:00:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:00:59,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:00:59,809 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:00:59,810 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-26 03:00:59,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:00:59 BoogieIcfgContainer [2021-08-26 03:00:59,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:00:59,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:00:59,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:00:59,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:00:59,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:00:58" (1/3) ... [2021-08-26 03:00:59,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f3f09e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:00:59, skipping insertion in model container [2021-08-26 03:00:59,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:59" (2/3) ... [2021-08-26 03:00:59,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f3f09e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:00:59, skipping insertion in model container [2021-08-26 03:00:59,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:00:59" (3/3) ... [2021-08-26 03:00:59,818 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2021-08-26 03:00:59,827 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:00:59,828 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:00:59,879 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:00:59,886 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 03:00:59,886 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:00:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 03:00:59,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:00:59,909 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:00:59,910 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:00:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:00:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash 742134712, now seen corresponding path program 1 times [2021-08-26 03:00:59,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 03:00:59,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967516805] [2021-08-26 03:00:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:59,931 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 03:00:59,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 03:00:59,933 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 03:00:59,934 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 03:01:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:01:00,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 03:01:00,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:01:00,162 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 03:01:00,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 03:01:00,230 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 03:01:00,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 03:01:00,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967516805] [2021-08-26 03:01:00,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967516805] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 03:01:00,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:01:00,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-08-26 03:01:00,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536970890] [2021-08-26 03:01:00,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 03:01:00,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 03:01:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 03:01:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 03:01:00,252 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 03:01:00,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:01:00,374 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2021-08-26 03:01:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:01:00,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) Word has length 10 [2021-08-26 03:01:00,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:01:00,384 INFO L225 Difference]: With dead ends: 44 [2021-08-26 03:01:00,385 INFO L226 Difference]: Without dead ends: 22 [2021-08-26 03:01:00,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 03:01:00,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-26 03:01:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-26 03:01:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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 03:01:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-08-26 03:01:00,416 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2021-08-26 03:01:00,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:01:00,416 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-08-26 03:01:00,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 03:01:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-08-26 03:01:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 03:01:00,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:01:00,418 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:01:00,432 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 03:01:00,619 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 03:01:00,619 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:01:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:01:00,620 INFO L82 PathProgramCache]: Analyzing trace with hash 500274136, now seen corresponding path program 1 times [2021-08-26 03:01:00,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 03:01:00,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042310928] [2021-08-26 03:01:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:01:00,621 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 03:01:00,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 03:01:00,622 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 03:01:00,624 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 03:01:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:01:00,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 03:01:00,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:01:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:01:00,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 03:01:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:01:00,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 03:01:00,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042310928] [2021-08-26 03:01:00,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042310928] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 03:01:00,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:01:00,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-26 03:01:00,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398192409] [2021-08-26 03:01:00,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 03:01:00,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 03:01:00,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 03:01:00,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:01:00,937 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 03:01:01,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:01:01,410 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-08-26 03:01:01,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 03:01:01,411 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 16 [2021-08-26 03:01:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:01:01,411 INFO L225 Difference]: With dead ends: 39 [2021-08-26 03:01:01,411 INFO L226 Difference]: Without dead ends: 28 [2021-08-26 03:01:01,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:01:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-26 03:01:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-26 03:01:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:01:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-08-26 03:01:01,417 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2021-08-26 03:01:01,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:01:01,417 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-08-26 03:01:01,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 03:01:01,418 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-08-26 03:01:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 03:01:01,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:01:01,427 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:01:01,438 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 03:01:01,640 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 03:01:01,640 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:01:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:01:01,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2045871112, now seen corresponding path program 2 times [2021-08-26 03:01:01,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 03:01:01,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738230939] [2021-08-26 03:01:01,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:01:01,642 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 03:01:01,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 03:01:01,643 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 03:01:01,646 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 03:01:01,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:01:01,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:01:01,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 03:01:01,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:01:01,929 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 03:01:02,034 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-26 03:01:02,035 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 28 treesize of output 35 [2021-08-26 03:01:02,296 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-08-26 03:01:02,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 46 treesize of output 63 [2021-08-26 03:01:02,750 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-08-26 03:01:02,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 66 treesize of output 83 [2021-08-26 03:01:03,304 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-08-26 03:01:03,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 95 [2021-08-26 03:01:03,426 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-26 03:01:03,427 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 1 case distinctions, treesize of input 40 treesize of output 12 [2021-08-26 03:01:03,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:01:03,542 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-08-26 03:01:03,543 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 2 case distinctions, treesize of input 51 treesize of output 24 [2021-08-26 03:01:03,633 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 03:01:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:01:03,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 03:01:05,138 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_3 (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (ULTIMATE.start_dll_circular_create_~last~0.offset (_ BitVec 32))) (= (select (store (select (store |c_#memory_int| c_ULTIMATE.start_dll_circular_create_~last~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_circular_create_~last~0.base) (bvadd (_ bv4 32) ULTIMATE.start_dll_circular_create_~last~0.offset) v_DerPreprocessor_2)) c_ULTIMATE.start_dll_circular_create_~head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_circular_create_~head~0.offset) v_DerPreprocessor_3) c_ULTIMATE.start_dll_circular_create_~head~0.offset) c_ULTIMATE.start_main_~data_init~0)) is different from false [2021-08-26 03:01:27,690 WARN L207 SmtUtils]: Spent 22.52 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-08-26 03:01:27,692 INFO L354 Elim1Store]: treesize reduction 40, result has 69.7 percent of original size [2021-08-26 03:01:27,692 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 104 [2021-08-26 03:01:27,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:01:27,712 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 94 treesize of output 94 [2021-08-26 03:01:29,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-08-26 03:01:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 6 refuted. 1 times theorem prover too weak. 0 trivial. 4 not checked. [2021-08-26 03:01:39,221 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 03:01:39,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738230939] [2021-08-26 03:01:39,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738230939] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 03:01:39,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:01:39,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-26 03:01:39,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148010564] [2021-08-26 03:01:39,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-26 03:01:39,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 03:01:39,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-26 03:01:39,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=340, Unknown=5, NotChecked=38, Total=462 [2021-08-26 03:01:39,228 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 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 03:01:47,730 WARN L207 SmtUtils]: Spent 6.85 s on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-08-26 03:01:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:01:54,926 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-08-26 03:01:54,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 03:01:54,928 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 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 22 [2021-08-26 03:01:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:01:54,929 INFO L225 Difference]: With dead ends: 36 [2021-08-26 03:01:54,929 INFO L226 Difference]: Without dead ends: 34 [2021-08-26 03:01:54,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 23211.2ms TimeCoverageRelationStatistics Valid=225, Invalid=644, Unknown=5, NotChecked=56, Total=930 [2021-08-26 03:01:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-26 03:01:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-08-26 03:01:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:01:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-08-26 03:01:54,934 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2021-08-26 03:01:54,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:01:54,935 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-08-26 03:01:54,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 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 03:01:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-08-26 03:01:54,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 03:01:54,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:01:54,936 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:01:54,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-08-26 03:01:55,154 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 03:01:55,155 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:01:55,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:01:55,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1335739081, now seen corresponding path program 1 times [2021-08-26 03:01:55,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 03:01:55,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082155477] [2021-08-26 03:01:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:01:55,156 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 03:01:55,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 03:01:55,158 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 03:01:55,164 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 03:01:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:01:55,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-26 03:01:55,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:01:55,543 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 03:01:55,639 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-26 03:01:55,640 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 23 treesize of output 30 [2021-08-26 03:01:55,829 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-08-26 03:01:55,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 44 treesize of output 61 [2021-08-26 03:01:56,249 INFO L354 Elim1Store]: treesize reduction 61, result has 37.8 percent of original size [2021-08-26 03:01:56,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 69 treesize of output 96 [2021-08-26 03:01:56,676 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-26 03:01:56,677 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 1 case distinctions, treesize of input 94 treesize of output 66 [2021-08-26 03:01:56,991 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-08-26 03:01:56,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 104 treesize of output 110 [2021-08-26 03:01:57,243 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 03:01:57,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 91 [2021-08-26 03:01:57,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 77 [2021-08-26 03:01:57,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 75 [2021-08-26 03:01:57,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:01:57,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:01:57,689 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-08-26 03:01:57,690 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 164 treesize of output 144 [2021-08-26 03:01:57,701 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 03:01:57,701 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 202 treesize of output 171 [2021-08-26 03:01:57,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:01:57,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:01:57,740 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-08-26 03:01:57,740 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 165 treesize of output 140 [2021-08-26 03:01:57,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:01:57,763 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 03:01:57,763 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 134 treesize of output 121 [2021-08-26 03:01:58,134 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-26 03:01:58,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 127 [2021-08-26 03:01:58,177 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-26 03:01:58,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 103 [2021-08-26 03:01:58,207 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 03:01:58,207 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 2 case distinctions, treesize of input 88 treesize of output 83 [2021-08-26 03:01:58,218 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-26 03:01:58,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 70 treesize of output 67 [2021-08-26 03:01:58,227 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-26 03:01:58,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 35 [2021-08-26 03:01:58,290 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 03:01:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:01:58,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 03:02:08,427 WARN L207 SmtUtils]: Spent 9.30 s on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-08-26 03:02:08,428 INFO L354 Elim1Store]: treesize reduction 200, result has 26.5 percent of original size [2021-08-26 03:02:08,429 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 346 treesize of output 335 [2021-08-26 03:02:09,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:02:09,384 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 335 treesize of output 349 [2021-08-26 03:02:14,025 INFO L354 Elim1Store]: treesize reduction 189, result has 30.5 percent of original size [2021-08-26 03:02:14,025 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 380 treesize of output 380 [2021-08-26 03:02:14,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:02:14,281 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 380 treesize of output 394 [2021-08-26 03:02:14,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-08-26 03:02:15,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-08-26 03:02:15,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:02:15,373 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 21 treesize of output 25 [2021-08-26 03:02:15,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:02:15,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:02:16,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:02:16,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 257 treesize of output 273 [2021-08-26 03:02:17,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-08-26 03:02:17,640 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 03:02:17,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082155477] [2021-08-26 03:02:17,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 03:02:17,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2060765367] [2021-08-26 03:02:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:17,641 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-26 03:02:17,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-26 03:02:17,643 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-26 03:02:17,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-08-26 03:02:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:18,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 03:02:18,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:18,277 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 03:02:18,460 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-26 03:02:18,460 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 25 treesize of output 32 [2021-08-26 03:02:18,647 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-26 03:02:18,647 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 61 treesize of output 33 [2021-08-26 03:02:18,836 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-26 03:02:18,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 45 treesize of output 47 [2021-08-26 03:02:19,061 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 03:02:19,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 87 [2021-08-26 03:02:19,068 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 77 treesize of output 66 [2021-08-26 03:02:19,072 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 65 [2021-08-26 03:02:19,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2021-08-26 03:02:19,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:19,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:02:19,468 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-08-26 03:02:19,468 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 148 treesize of output 136 [2021-08-26 03:02:19,477 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 03:02:19,478 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 175 treesize of output 148 [2021-08-26 03:02:19,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:19,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:02:19,510 INFO L354 Elim1Store]: treesize reduction 44, result has 25.4 percent of original size [2021-08-26 03:02:19,511 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 142 treesize of output 117 [2021-08-26 03:02:19,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:19,519 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 03:02:19,519 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 111 treesize of output 98 [2021-08-26 03:02:20,118 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-26 03:02:20,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 142 [2021-08-26 03:02:20,178 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-26 03:02:20,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 107 [2021-08-26 03:02:20,195 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-26 03:02:20,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 95 treesize of output 92 [2021-08-26 03:02:20,205 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-26 03:02:20,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 60 [2021-08-26 03:02:20,222 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 03:02:20,222 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 2 case distinctions, treesize of input 48 treesize of output 43 [2021-08-26 03:02:20,606 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-26 03:02:20,606 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 33 treesize of output 24 [2021-08-26 03:02:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:20,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 03:02:22,893 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_dll_circular_create_~last~0.base (_ BitVec 32)) (v_DerPreprocessor_18 (_ BitVec 32))) (= (let ((.cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_dll_circular_create_~last~0.offset)) (.cse1 (bvadd (_ bv8 32) c_ULTIMATE.start_dll_circular_create_~head~0.offset)) (.cse3 (bvadd (_ bv4 32) c_ULTIMATE.start_dll_circular_create_~head~0.offset))) (select (select (let ((.cse0 (store |c_#memory_int| ULTIMATE.start_dll_circular_create_~last~0.base (store (select |c_#memory_int| ULTIMATE.start_dll_circular_create_~last~0.base) .cse2 v_DerPreprocessor_21)))) (store .cse0 c_ULTIMATE.start_dll_circular_create_~head~0.base (store (store (select .cse0 c_ULTIMATE.start_dll_circular_create_~head~0.base) .cse1 v_DerPreprocessor_20) c_ULTIMATE.start_dll_circular_create_~head~0.offset (_ bv1 32)))) (select (store (store (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_dll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_dll_circular_create_~last~0.base) .cse2 c_ULTIMATE.start_dll_circular_create_~head~0.base)) c_ULTIMATE.start_dll_circular_create_~head~0.base) .cse1 ULTIMATE.start_dll_circular_create_~last~0.base) c_ULTIMATE.start_dll_circular_create_~head~0.offset v_DerPreprocessor_18) .cse3)) (select (store (store (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_dll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_dll_circular_create_~last~0.base) .cse2 c_ULTIMATE.start_dll_circular_create_~head~0.offset)) c_ULTIMATE.start_dll_circular_create_~head~0.base) .cse1 c_ULTIMATE.start_dll_circular_create_~last~0.offset) c_ULTIMATE.start_dll_circular_create_~head~0.offset v_DerPreprocessor_19) .cse3))) c_ULTIMATE.start_main_~data_init~0)) is different from false [2021-08-26 03:02:31,052 WARN L207 SmtUtils]: Spent 8.10 s on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-08-26 03:02:31,053 INFO L354 Elim1Store]: treesize reduction 200, result has 26.5 percent of original size [2021-08-26 03:02:31,053 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 258 treesize of output 247 [2021-08-26 03:02:31,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:02:31,837 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 335 treesize of output 349 [2021-08-26 03:02:42,224 WARN L207 SmtUtils]: Spent 10.37 s on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-08-26 03:02:42,225 INFO L354 Elim1Store]: treesize reduction 189, result has 30.5 percent of original size [2021-08-26 03:02:42,225 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 380 treesize of output 380 [2021-08-26 03:02:42,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:02:42,517 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 380 treesize of output 394 [2021-08-26 03:02:42,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:02:42,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:02:42,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 201 [2021-08-26 03:03:12,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 03:03:12,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026714456] [2021-08-26 03:03:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:12,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:12,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:12,184 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 03:03:12,187 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 03:03:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:12,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 03:03:12,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:03:12,609 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 03:03:12,686 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-26 03:03:12,686 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 23 treesize of output 30 [2021-08-26 03:03:12,845 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-26 03:03:12,846 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 57 treesize of output 29 [2021-08-26 03:03:13,012 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-26 03:03:13,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 45 [2021-08-26 03:03:13,182 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 03:03:13,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 87 [2021-08-26 03:03:13,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 73 [2021-08-26 03:03:13,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2021-08-26 03:03:13,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:03:13,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:03:13,577 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-08-26 03:03:13,578 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 148 treesize of output 136 [2021-08-26 03:03:13,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:03:13,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:03:13,641 INFO L354 Elim1Store]: treesize reduction 44, result has 25.4 percent of original size [2021-08-26 03:03:13,641 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 175 treesize of output 150 [2021-08-26 03:03:13,650 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 03:03:13,651 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 144 treesize of output 117 [2021-08-26 03:03:13,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:03:13,660 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 03:03:13,661 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 111 treesize of output 98 [2021-08-26 03:03:14,211 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-26 03:03:14,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 142 [2021-08-26 03:03:14,247 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-26 03:03:14,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 107 [2021-08-26 03:03:14,255 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-26 03:03:14,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 95 treesize of output 92 [2021-08-26 03:03:14,268 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-26 03:03:14,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 60 [2021-08-26 03:03:14,285 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 03:03:14,286 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 2 case distinctions, treesize of input 48 treesize of output 43 [2021-08-26 03:03:14,677 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-26 03:03:14,678 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 33 treesize of output 24 [2021-08-26 03:03:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:03:14,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 03:03:16,921 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (ULTIMATE.start_dll_circular_create_~last~0.base (_ BitVec 32)) (v_DerPreprocessor_18 (_ BitVec 32))) (= c_ULTIMATE.start_main_~data_init~0 (let ((.cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_dll_circular_create_~last~0.offset)) (.cse1 (bvadd (_ bv8 32) c_ULTIMATE.start_dll_circular_create_~head~0.offset)) (.cse3 (bvadd (_ bv4 32) c_ULTIMATE.start_dll_circular_create_~head~0.offset))) (select (select (let ((.cse0 (store |c_#memory_int| ULTIMATE.start_dll_circular_create_~last~0.base (store (select |c_#memory_int| ULTIMATE.start_dll_circular_create_~last~0.base) .cse2 v_DerPreprocessor_32)))) (store .cse0 c_ULTIMATE.start_dll_circular_create_~head~0.base (store (store (select .cse0 c_ULTIMATE.start_dll_circular_create_~head~0.base) .cse1 v_DerPreprocessor_31) c_ULTIMATE.start_dll_circular_create_~head~0.offset (_ bv1 32)))) (select (store (store (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_dll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_dll_circular_create_~last~0.base) .cse2 c_ULTIMATE.start_dll_circular_create_~head~0.base)) c_ULTIMATE.start_dll_circular_create_~head~0.base) .cse1 ULTIMATE.start_dll_circular_create_~last~0.base) c_ULTIMATE.start_dll_circular_create_~head~0.offset v_DerPreprocessor_18) .cse3)) (select (store (store (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_dll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_dll_circular_create_~last~0.base) .cse2 c_ULTIMATE.start_dll_circular_create_~head~0.offset)) c_ULTIMATE.start_dll_circular_create_~head~0.base) .cse1 c_ULTIMATE.start_dll_circular_create_~last~0.offset) c_ULTIMATE.start_dll_circular_create_~head~0.offset v_DerPreprocessor_19) .cse3))))) is different from false [2021-08-26 03:03:24,924 WARN L207 SmtUtils]: Spent 7.96 s on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-08-26 03:03:24,924 INFO L354 Elim1Store]: treesize reduction 200, result has 26.5 percent of original size [2021-08-26 03:03:24,925 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 258 treesize of output 247 [2021-08-26 03:03:25,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:03:25,674 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 335 treesize of output 349 [2021-08-26 03:03:32,670 WARN L207 SmtUtils]: Spent 6.98 s on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-08-26 03:03:32,671 INFO L354 Elim1Store]: treesize reduction 189, result has 30.5 percent of original size [2021-08-26 03:03:32,671 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 380 treesize of output 380 [2021-08-26 03:03:32,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:03:32,902 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 380 treesize of output 394 [2021-08-26 03:03:33,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-08-26 03:03:33,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-08-26 03:03:34,233 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 03:03:34,233 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 17 treesize of output 9 [2021-08-26 03:03:34,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:03:34,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:03:34,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:03:35,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:03:35,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 286 treesize of output 320 [2021-08-26 03:03:40,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-08-26 03:03:40,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 03:03:40,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:03:40,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-26 03:03:40,254 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-26 03:03:40,255 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-26 03:03:40,258 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:03:40,269 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 03:03:40,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-26 03:03:40,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-08-26 03:03:40,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-08-26 03:03:40,864 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:03:40,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:03:40 BoogieIcfgContainer [2021-08-26 03:03:40,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:03:40,877 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:03:40,877 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:03:40,877 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:03:40,877 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:00:59" (3/4) ... [2021-08-26 03:03:40,880 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 03:03:40,880 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:03:40,880 INFO L168 Benchmark]: Toolchain (without parser) took 162095.25 ms. Allocated memory was 62.9 MB in the beginning and 117.4 MB in the end (delta: 54.5 MB). Free memory was 42.6 MB in the beginning and 74.6 MB in the end (delta: -32.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:40,881 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 62.9 MB. Free memory is still 45.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:03:40,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.65 ms. Allocated memory is still 62.9 MB. Free memory was 42.5 MB in the beginning and 38.6 MB in the end (delta: 3.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:40,881 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.70 ms. Allocated memory is still 62.9 MB. Free memory was 38.4 MB in the beginning and 36.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:40,881 INFO L168 Benchmark]: Boogie Preprocessor took 33.66 ms. Allocated memory is still 62.9 MB. Free memory was 36.5 MB in the beginning and 34.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:40,882 INFO L168 Benchmark]: RCFGBuilder took 553.85 ms. Allocated memory was 62.9 MB in the beginning and 79.7 MB in the end (delta: 16.8 MB). Free memory was 34.6 MB in the beginning and 46.3 MB in the end (delta: -11.8 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:40,882 INFO L168 Benchmark]: TraceAbstraction took 161063.40 ms. Allocated memory was 79.7 MB in the beginning and 117.4 MB in the end (delta: 37.7 MB). Free memory was 46.0 MB in the beginning and 74.6 MB in the end (delta: -28.6 MB). Peak memory consumption was 58.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:40,882 INFO L168 Benchmark]: Witness Printer took 3.13 ms. Allocated memory is still 117.4 MB. Free memory is still 74.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:03:40,883 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 62.9 MB. Free memory is still 45.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 372.65 ms. Allocated memory is still 62.9 MB. Free memory was 42.5 MB in the beginning and 38.6 MB in the end (delta: 3.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.70 ms. Allocated memory is still 62.9 MB. Free memory was 38.4 MB in the beginning and 36.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.66 ms. Allocated memory is still 62.9 MB. Free memory was 36.5 MB in the beginning and 34.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 553.85 ms. Allocated memory was 62.9 MB in the beginning and 79.7 MB in the end (delta: 16.8 MB). Free memory was 34.6 MB in the beginning and 46.3 MB in the end (delta: -11.8 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 161063.40 ms. Allocated memory was 79.7 MB in the beginning and 117.4 MB in the end (delta: 37.7 MB). Free memory was 46.0 MB in the beginning and 74.6 MB in the end (delta: -28.6 MB). Peak memory consumption was 58.1 MB. Max. memory is 16.1 GB. * Witness Printer took 3.13 ms. Allocated memory is still 117.4 MB. Free memory is still 74.6 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: 626]: 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: [L600] const int len = 5; [L601] const int data_init = 1; [L576] DLL last = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == last) [L580] last->next = last [L581] last->prev = last [L582] last->data = data [L583] DLL head = last; [L584] COND TRUE len > 1 [L585] DLL new_head = (DLL) malloc(sizeof(struct node)); [L586] COND FALSE !(((void *)0) == new_head) [L589] new_head->next = head [L590] new_head->data = data [L591] head->prev = new_head [L592] head = new_head [L593] len-- [L584] COND TRUE len > 1 [L585] DLL new_head = (DLL) malloc(sizeof(struct node)); [L586] COND FALSE !(((void *)0) == new_head) [L589] new_head->next = head [L590] new_head->data = data [L591] head->prev = new_head [L592] head = new_head [L593] len-- [L584] COND TRUE len > 1 [L585] DLL new_head = (DLL) malloc(sizeof(struct node)); [L586] COND FALSE !(((void *)0) == new_head) [L589] new_head->next = head [L590] new_head->data = data [L591] head->prev = new_head [L592] head = new_head [L593] len-- [L584] COND TRUE len > 1 [L585] DLL new_head = (DLL) malloc(sizeof(struct node)); [L586] COND FALSE !(((void *)0) == new_head) [L589] new_head->next = head [L590] new_head->data = data [L591] head->prev = new_head [L592] head = new_head [L593] len-- [L584] COND FALSE !(len > 1) [L595] last->next = head [L596] head->prev = last [L597] return head; [L602] DLL head = dll_circular_create(len, data_init); [L603] int data_new = 1; [L604] DLL ptr = head; [L606] EXPR ptr->data [L606] COND FALSE !(data_init != ptr->data) [L609] ptr->data = data_new [L610] EXPR ptr->next [L610] ptr = ptr->next [L611] data_new++ [L612] COND TRUE ptr != head [L606] EXPR ptr->data [L606] COND TRUE data_init != ptr->data [L626] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 160987.2ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 22.6ms, AutomataDifference: 16331.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 58 SDtfs, 75 SDslu, 173 SDs, 0 SdLazy, 213 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2844.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 23266.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=3, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27.5ms AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 48.8ms SsaConstructionTime, 238.9ms SatisfiabilityAnalysisTime, 37745.4ms InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 90 ConstructedInterpolants, 23 QuantifiedInterpolants, 1336 SizeOfPredicates, 27 NumberOfNonLiveVariables, 261 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 23/54 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 03:03:41,109 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-26 03:03:41,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...