./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/sll-sorted-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/forester-heap/sll-sorted-1.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 74e0b352d931a66de9a161af95640ba630597594 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:24:54,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:24:54,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:24:54,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:24:54,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:24:54,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:24:54,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:24:54,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:24:54,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:24:54,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:24:54,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:24:54,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:24:54,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:24:54,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:24:54,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:24:54,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:24:54,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:24:54,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:24:54,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:24:54,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:24:54,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:24:54,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:24:54,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:24:54,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:24:54,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:24:54,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:24:54,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:24:54,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:24:54,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:24:54,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:24:54,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:24:54,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:24:54,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:24:54,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:24:54,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:24:54,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:24:54,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:24:54,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:24:54,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:24:54,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:24:54,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:24:54,903 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 02:24:54,917 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:24:54,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:24:54,918 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:24:54,918 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:24:54,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:24:54,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:24:54,919 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:24:54,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:24:54,919 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:24:54,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 02:24:54,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:24:54,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:24:54,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:24:54,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:24:54,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:24:54,921 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:24:54,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:24:54,921 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:24:54,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:24:54,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:24:54,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:24:54,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:24:54,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:24:54,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:24:54,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:24:54,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:24:54,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 02:24:54,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 02:24:54,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:24:54,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:24:54,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74e0b352d931a66de9a161af95640ba630597594 [2021-08-26 02:24:55,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:24:55,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:24:55,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:24:55,154 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:24:55,155 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:24:55,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-sorted-1.i [2021-08-26 02:24:55,192 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fdda368a/fbf594edee0144c980c361e2f4d32cde/FLAGf11a89d97 [2021-08-26 02:24:55,532 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:24:55,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i [2021-08-26 02:24:55,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fdda368a/fbf594edee0144c980c361e2f4d32cde/FLAGf11a89d97 [2021-08-26 02:24:55,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fdda368a/fbf594edee0144c980c361e2f4d32cde [2021-08-26 02:24:55,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:24:55,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:24:55,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:24:55,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:24:55,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:24:55,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:24:55" (1/1) ... [2021-08-26 02:24:55,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e0b18d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:24:55, skipping insertion in model container [2021-08-26 02:24:55,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:24:55" (1/1) ... [2021-08-26 02:24:55,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:24:56,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:24:56,188 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22317,22330] [2021-08-26 02:24:56,191 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22547,22560] [2021-08-26 02:24:56,194 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22877,22890] [2021-08-26 02:24:56,194 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22941,22954] [2021-08-26 02:24:56,195 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23072,23085] [2021-08-26 02:24:56,195 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23136,23149] [2021-08-26 02:24:56,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:24:56,202 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:24:56,222 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22317,22330] [2021-08-26 02:24:56,224 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22547,22560] [2021-08-26 02:24:56,225 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22877,22890] [2021-08-26 02:24:56,226 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22941,22954] [2021-08-26 02:24:56,227 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23072,23085] [2021-08-26 02:24:56,227 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23136,23149] [2021-08-26 02:24:56,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:24:56,244 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:24:56,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:24:56 WrapperNode [2021-08-26 02:24:56,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:24:56,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:24:56,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:24:56,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:24:56,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:24:56" (1/1) ... [2021-08-26 02:24:56,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:24:56" (1/1) ... [2021-08-26 02:24:56,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:24:56,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:24:56,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:24:56,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:24:56,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:24:56" (1/1) ... [2021-08-26 02:24:56,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:24:56" (1/1) ... [2021-08-26 02:24:56,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:24:56" (1/1) ... [2021-08-26 02:24:56,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:24:56" (1/1) ... [2021-08-26 02:24:56,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:24:56" (1/1) ... [2021-08-26 02:24:56,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:24:56" (1/1) ... [2021-08-26 02:24:56,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:24:56" (1/1) ... [2021-08-26 02:24:56,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:24:56,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:24:56,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:24:56,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:24:56,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:24:56" (1/1) ... [2021-08-26 02:24:56,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:24:56,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:24:56,319 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 02:24:56,335 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 02:24:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 02:24:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 02:24:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:24:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:24:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:24:56,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:24:56,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:24:56,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 02:24:56,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:24:56,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:24:56,705 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:24:56,705 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-08-26 02:24:56,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:24:56 BoogieIcfgContainer [2021-08-26 02:24:56,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:24:56,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:24:56,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:24:56,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:24:56,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:24:55" (1/3) ... [2021-08-26 02:24:56,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298625e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:24:56, skipping insertion in model container [2021-08-26 02:24:56,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:24:56" (2/3) ... [2021-08-26 02:24:56,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298625e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:24:56, skipping insertion in model container [2021-08-26 02:24:56,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:24:56" (3/3) ... [2021-08-26 02:24:56,712 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-sorted-1.i [2021-08-26 02:24:56,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:24:56,715 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-08-26 02:24:56,748 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:24:56,752 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 02:24:56,752 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-26 02:24:56,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 55 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 02:24:56,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 02:24:56,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:24:56,766 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 02:24:56,766 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:24:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:24:56,771 INFO L82 PathProgramCache]: Analyzing trace with hash 890153286, now seen corresponding path program 1 times [2021-08-26 02:24:56,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:24:56,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685789261] [2021-08-26 02:24:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:24:56,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:24:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:24:56,917 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 02:24:56,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:24:56,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685789261] [2021-08-26 02:24:56,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685789261] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:24:56,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:24:56,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 02:24:56,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853287002] [2021-08-26 02:24:56,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:24:56,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:24:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:24:56,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:24:56,953 INFO L87 Difference]: Start difference. First operand has 56 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 55 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:24:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:24:56,974 INFO L93 Difference]: Finished difference Result 106 states and 172 transitions. [2021-08-26 02:24:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:24:56,975 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-26 02:24:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:24:56,983 INFO L225 Difference]: With dead ends: 106 [2021-08-26 02:24:56,986 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 02:24:56,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:24:56,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 02:24:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-26 02:24:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 49 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 02:24:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-08-26 02:24:57,014 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 6 [2021-08-26 02:24:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:24:57,014 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-08-26 02:24:57,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:24:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-08-26 02:24:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 02:24:57,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:24:57,015 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:24:57,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 02:24:57,016 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:24:57,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:24:57,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1806859191, now seen corresponding path program 1 times [2021-08-26 02:24:57,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:24:57,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924506805] [2021-08-26 02:24:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:24:57,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:24:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:24:57,084 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 02:24:57,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:24:57,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924506805] [2021-08-26 02:24:57,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924506805] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:24:57,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:24:57,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 02:24:57,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638757053] [2021-08-26 02:24:57,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:24:57,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:24:57,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:24:57,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:24:57,089 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:24:57,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:24:57,137 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2021-08-26 02:24:57,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:24:57,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-26 02:24:57,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:24:57,140 INFO L225 Difference]: With dead ends: 103 [2021-08-26 02:24:57,140 INFO L226 Difference]: Without dead ends: 55 [2021-08-26 02:24:57,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:24:57,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-26 02:24:57,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-08-26 02:24:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 53 states have internal predecessors, (65), 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 02:24:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-08-26 02:24:57,149 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 7 [2021-08-26 02:24:57,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:24:57,149 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-08-26 02:24:57,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:24:57,150 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-08-26 02:24:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 02:24:57,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:24:57,152 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:24:57,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 02:24:57,153 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:24:57,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:24:57,154 INFO L82 PathProgramCache]: Analyzing trace with hash 443319948, now seen corresponding path program 1 times [2021-08-26 02:24:57,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:24:57,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012799664] [2021-08-26 02:24:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:24:57,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:24:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:24:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:24:57,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:24:57,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012799664] [2021-08-26 02:24:57,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012799664] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:24:57,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:24:57,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 02:24:57,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591110434] [2021-08-26 02:24:57,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 02:24:57,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:24:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 02:24:57,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 02:24:57,249 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 02:24:57,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:24:57,370 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2021-08-26 02:24:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:24:57,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 11 [2021-08-26 02:24:57,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:24:57,373 INFO L225 Difference]: With dead ends: 87 [2021-08-26 02:24:57,374 INFO L226 Difference]: Without dead ends: 85 [2021-08-26 02:24:57,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:24:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-26 02:24:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2021-08-26 02:24:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 51 states have internal predecessors, (63), 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 02:24:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-08-26 02:24:57,390 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 11 [2021-08-26 02:24:57,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:24:57,390 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-08-26 02:24:57,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 02:24:57,390 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-08-26 02:24:57,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 02:24:57,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:24:57,391 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:24:57,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 02:24:57,391 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:24:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:24:57,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1236050174, now seen corresponding path program 1 times [2021-08-26 02:24:57,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:24:57,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684604866] [2021-08-26 02:24:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:24:57,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:24:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:24:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:24:57,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:24:57,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684604866] [2021-08-26 02:24:57,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684604866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:24:57,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74282156] [2021-08-26 02:24:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:24:57,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:24:57,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:24:57,810 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 02:24:57,811 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 02:24:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:24:57,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-26 02:24:57,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:24:57,990 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 02:24:58,054 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:24:58,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:24:58,071 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:24:58,071 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 02:24:58,079 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 27 treesize of output 15 [2021-08-26 02:24:58,212 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:24:58,212 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 1 case distinctions, treesize of input 111 treesize of output 76 [2021-08-26 02:24:58,220 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:24:58,220 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 84 treesize of output 63 [2021-08-26 02:24:58,224 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 57 treesize of output 49 [2021-08-26 02:24:58,701 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:24:58,702 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 42 [2021-08-26 02:24:58,718 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:24:58,718 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 33 treesize of output 21 [2021-08-26 02:24:58,745 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 02:24:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:24:58,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74282156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:24:58,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:24:58,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-26 02:24:58,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042822853] [2021-08-26 02:24:58,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 02:24:58,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:24:58,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 02:24:58,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-26 02:24:58,755 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 02:24:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:24:59,221 INFO L93 Difference]: Finished difference Result 98 states and 125 transitions. [2021-08-26 02:24:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 02:24:59,222 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 21 [2021-08-26 02:24:59,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:24:59,222 INFO L225 Difference]: With dead ends: 98 [2021-08-26 02:24:59,222 INFO L226 Difference]: Without dead ends: 96 [2021-08-26 02:24:59,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-26 02:24:59,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-26 02:24:59,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 70. [2021-08-26 02:24:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.353846153846154) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:24:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2021-08-26 02:24:59,227 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 21 [2021-08-26 02:24:59,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:24:59,228 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2021-08-26 02:24:59,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 02:24:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2021-08-26 02:24:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 02:24:59,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:24:59,229 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:24:59,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 02:24:59,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:24:59,444 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:24:59,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:24:59,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1635781222, now seen corresponding path program 1 times [2021-08-26 02:24:59,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:24:59,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720193169] [2021-08-26 02:24:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:24:59,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:24:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:24:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:24:59,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:24:59,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720193169] [2021-08-26 02:24:59,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720193169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:24:59,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253326923] [2021-08-26 02:24:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:24:59,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:24:59,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:24:59,635 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 02:24:59,636 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 02:24:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:24:59,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-26 02:24:59,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:24:59,808 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 02:24:59,867 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:24:59,867 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 02:24:59,873 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 27 treesize of output 15 [2021-08-26 02:24:59,882 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 27 treesize of output 15 [2021-08-26 02:24:59,996 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-08-26 02:24:59,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 90 [2021-08-26 02:25:00,024 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-26 02:25:00,025 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 70 [2021-08-26 02:25:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:00,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253326923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:00,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:25:00,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-26 02:25:00,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430394561] [2021-08-26 02:25:00,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 02:25:00,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:00,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 02:25:00,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-26 02:25:00,316 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 02:25:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:00,749 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2021-08-26 02:25:00,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 02:25:00,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) Word has length 24 [2021-08-26 02:25:00,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:00,752 INFO L225 Difference]: With dead ends: 135 [2021-08-26 02:25:00,752 INFO L226 Difference]: Without dead ends: 97 [2021-08-26 02:25:00,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:25:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-26 02:25:00,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2021-08-26 02:25:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 73 states have internal predecessors, (92), 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 02:25:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2021-08-26 02:25:00,757 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 24 [2021-08-26 02:25:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:00,758 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2021-08-26 02:25:00,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 02:25:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2021-08-26 02:25:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 02:25:00,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:00,759 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:00,778 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 02:25:00,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:00,976 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:00,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:00,977 INFO L82 PathProgramCache]: Analyzing trace with hash 826434596, now seen corresponding path program 1 times [2021-08-26 02:25:00,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:00,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578204117] [2021-08-26 02:25:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:00,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 02:25:01,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:01,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578204117] [2021-08-26 02:25:01,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578204117] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:25:01,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:25:01,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:25:01,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352166927] [2021-08-26 02:25:01,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:25:01,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:01,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:25:01,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:25:01,040 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:01,120 INFO L93 Difference]: Finished difference Result 121 states and 151 transitions. [2021-08-26 02:25:01,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:25:01,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-26 02:25:01,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:01,121 INFO L225 Difference]: With dead ends: 121 [2021-08-26 02:25:01,121 INFO L226 Difference]: Without dead ends: 83 [2021-08-26 02:25:01,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:25:01,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-26 02:25:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2021-08-26 02:25:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.323943661971831) internal successors, (94), 75 states have internal predecessors, (94), 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 02:25:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2021-08-26 02:25:01,126 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 24 [2021-08-26 02:25:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:01,126 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2021-08-26 02:25:01,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2021-08-26 02:25:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 02:25:01,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:01,127 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:01,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-26 02:25:01,127 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:01,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1438181591, now seen corresponding path program 1 times [2021-08-26 02:25:01,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:01,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923871834] [2021-08-26 02:25:01,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:01,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:01,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:01,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923871834] [2021-08-26 02:25:01,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923871834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:01,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699232140] [2021-08-26 02:25:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:01,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:01,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:01,433 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 02:25:01,434 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 02:25:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:01,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-26 02:25:01,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:25:01,665 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 02:25:01,755 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:25:01,755 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 27 treesize of output 19 [2021-08-26 02:25:01,793 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:25:01,794 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 02:25:01,809 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 27 treesize of output 15 [2021-08-26 02:25:01,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:01,983 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:25:01,992 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 02:25:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:02,001 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:25:02,166 INFO L354 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2021-08-26 02:25:02,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 196 treesize of output 125 [2021-08-26 02:25:02,214 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:25:02,215 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 4 case distinctions, treesize of input 160 treesize of output 130 [2021-08-26 02:25:02,231 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 124 treesize of output 100 [2021-08-26 02:25:02,260 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-08-26 02:25:02,260 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 97 treesize of output 85 [2021-08-26 02:25:02,279 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-26 02:25:02,279 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 82 treesize of output 84 [2021-08-26 02:25:02,503 INFO L354 Elim1Store]: treesize reduction 126, result has 14.9 percent of original size [2021-08-26 02:25:02,504 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 141 [2021-08-26 02:25:02,520 INFO L354 Elim1Store]: treesize reduction 73, result has 13.1 percent of original size [2021-08-26 02:25:02,520 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 189 treesize of output 180 [2021-08-26 02:25:02,562 INFO L354 Elim1Store]: treesize reduction 214, result has 13.7 percent of original size [2021-08-26 02:25:02,562 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 177 treesize of output 148 [2021-08-26 02:25:02,976 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-08-26 02:25:02,976 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 6 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 93 [2021-08-26 02:25:02,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:25:02,992 INFO L354 Elim1Store]: treesize reduction 43, result has 6.5 percent of original size [2021-08-26 02:25:02,992 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 77 treesize of output 46 [2021-08-26 02:25:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:03,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699232140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:03,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:25:03,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-26 02:25:03,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915688643] [2021-08-26 02:25:03,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 02:25:03,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:03,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 02:25:03,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-26 02:25:03,081 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:03,884 INFO L93 Difference]: Finished difference Result 197 states and 238 transitions. [2021-08-26 02:25:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 02:25:03,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-26 02:25:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:03,885 INFO L225 Difference]: With dead ends: 197 [2021-08-26 02:25:03,885 INFO L226 Difference]: Without dead ends: 161 [2021-08-26 02:25:03,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 792.4ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-08-26 02:25:03,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-26 02:25:03,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 90. [2021-08-26 02:25:03,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 89 states have internal predecessors, (112), 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 02:25:03,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-08-26 02:25:03,890 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 25 [2021-08-26 02:25:03,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:03,891 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-08-26 02:25:03,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:03,891 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-08-26 02:25:03,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 02:25:03,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:03,891 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:03,929 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 02:25:04,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:04,108 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:04,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:04,109 INFO L82 PathProgramCache]: Analyzing trace with hash 244780313, now seen corresponding path program 1 times [2021-08-26 02:25:04,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:04,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927723335] [2021-08-26 02:25:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:04,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:04,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:04,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927723335] [2021-08-26 02:25:04,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927723335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:04,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768913029] [2021-08-26 02:25:04,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:04,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:04,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:04,484 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 02:25:04,486 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 02:25:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:04,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-26 02:25:04,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:25:04,797 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 02:25:04,850 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:25:04,851 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 27 treesize of output 15 [2021-08-26 02:25:04,875 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:25:04,876 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 27 treesize of output 19 [2021-08-26 02:25:04,905 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:25:04,906 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 02:25:05,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:05,049 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:25:05,063 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 02:25:05,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:05,077 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:25:05,236 INFO L354 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2021-08-26 02:25:05,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 196 treesize of output 125 [2021-08-26 02:25:05,270 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:25:05,271 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 4 case distinctions, treesize of input 160 treesize of output 130 [2021-08-26 02:25:05,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 100 [2021-08-26 02:25:05,293 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-26 02:25:05,293 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 97 treesize of output 99 [2021-08-26 02:25:05,315 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-08-26 02:25:05,315 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 90 treesize of output 78 [2021-08-26 02:25:05,477 INFO L354 Elim1Store]: treesize reduction 126, result has 14.9 percent of original size [2021-08-26 02:25:05,477 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 141 [2021-08-26 02:25:05,505 INFO L354 Elim1Store]: treesize reduction 73, result has 13.1 percent of original size [2021-08-26 02:25:05,506 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 189 treesize of output 180 [2021-08-26 02:25:05,545 INFO L354 Elim1Store]: treesize reduction 214, result has 13.7 percent of original size [2021-08-26 02:25:05,545 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 177 treesize of output 148 [2021-08-26 02:25:06,081 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-08-26 02:25:06,082 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 6 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 77 [2021-08-26 02:25:06,090 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-26 02:25:06,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 41 [2021-08-26 02:25:06,159 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-26 02:25:06,159 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 14 [2021-08-26 02:25:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:06,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768913029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:06,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:25:06,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-26 02:25:06,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80312002] [2021-08-26 02:25:06,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 02:25:06,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:06,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 02:25:06,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-26 02:25:06,169 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 02:25:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:07,419 INFO L93 Difference]: Finished difference Result 266 states and 330 transitions. [2021-08-26 02:25:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 02:25:07,420 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) Word has length 25 [2021-08-26 02:25:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:07,421 INFO L225 Difference]: With dead ends: 266 [2021-08-26 02:25:07,421 INFO L226 Difference]: Without dead ends: 199 [2021-08-26 02:25:07,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 894.2ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-08-26 02:25:07,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-26 02:25:07,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 101. [2021-08-26 02:25:07,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.3229166666666667) internal successors, (127), 100 states have internal predecessors, (127), 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 02:25:07,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2021-08-26 02:25:07,438 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 25 [2021-08-26 02:25:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:07,440 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2021-08-26 02:25:07,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 02:25:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2021-08-26 02:25:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 02:25:07,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:07,442 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:07,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 02:25:07,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:07,659 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:07,659 INFO L82 PathProgramCache]: Analyzing trace with hash -750062803, now seen corresponding path program 1 times [2021-08-26 02:25:07,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:07,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005979975] [2021-08-26 02:25:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:07,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:07,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:07,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005979975] [2021-08-26 02:25:07,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005979975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:07,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873332559] [2021-08-26 02:25:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:07,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:07,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:07,825 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 02:25:07,826 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 02:25:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:08,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-26 02:25:08,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:25:08,265 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 02:25:08,326 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:25:08,327 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 02:25:08,334 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 27 treesize of output 15 [2021-08-26 02:25:08,346 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 27 treesize of output 15 [2021-08-26 02:25:08,484 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-08-26 02:25:08,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 97 [2021-08-26 02:25:08,529 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-26 02:25:08,529 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 73 [2021-08-26 02:25:09,145 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-26 02:25:09,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 65 [2021-08-26 02:25:09,164 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-26 02:25:09,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 30 [2021-08-26 02:25:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:09,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873332559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:09,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:25:09,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-26 02:25:09,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725179053] [2021-08-26 02:25:09,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 02:25:09,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:09,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 02:25:09,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-26 02:25:09,198 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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 02:25:09,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:09,721 INFO L93 Difference]: Finished difference Result 160 states and 197 transitions. [2021-08-26 02:25:09,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 02:25:09,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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 27 [2021-08-26 02:25:09,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:09,723 INFO L225 Difference]: With dead ends: 160 [2021-08-26 02:25:09,723 INFO L226 Difference]: Without dead ends: 124 [2021-08-26 02:25:09,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 333.2ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:25:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-26 02:25:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2021-08-26 02:25:09,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.3235294117647058) internal successors, (135), 106 states have internal predecessors, (135), 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 02:25:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2021-08-26 02:25:09,749 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 27 [2021-08-26 02:25:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:09,750 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2021-08-26 02:25:09,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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 02:25:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2021-08-26 02:25:09,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 02:25:09,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:09,754 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:09,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 02:25:09,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:09,969 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:09,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1821911330, now seen corresponding path program 1 times [2021-08-26 02:25:09,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:09,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593360215] [2021-08-26 02:25:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:09,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:10,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:10,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593360215] [2021-08-26 02:25:10,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593360215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:10,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000629991] [2021-08-26 02:25:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:10,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:10,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:10,209 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 02:25:10,209 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 02:25:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:10,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-26 02:25:10,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:25:10,773 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 02:25:10,873 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:25:10,873 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 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-26 02:25:10,883 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 27 treesize of output 15 [2021-08-26 02:25:11,043 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-26 02:25:11,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 49 [2021-08-26 02:25:11,564 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:25:11,565 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 100 [2021-08-26 02:25:11,582 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-26 02:25:11,582 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 94 treesize of output 96 [2021-08-26 02:25:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:11,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000629991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:11,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:25:11,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-08-26 02:25:11,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136152681] [2021-08-26 02:25:11,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 02:25:11,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:11,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 02:25:11,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-26 02:25:11,656 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 02:25:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:12,798 INFO L93 Difference]: Finished difference Result 291 states and 348 transitions. [2021-08-26 02:25:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 02:25:12,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) Word has length 27 [2021-08-26 02:25:12,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:12,800 INFO L225 Difference]: With dead ends: 291 [2021-08-26 02:25:12,800 INFO L226 Difference]: Without dead ends: 237 [2021-08-26 02:25:12,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 904.0ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-08-26 02:25:12,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-08-26 02:25:12,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 119. [2021-08-26 02:25:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.2982456140350878) internal successors, (148), 118 states have internal predecessors, (148), 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 02:25:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 148 transitions. [2021-08-26 02:25:12,807 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 148 transitions. Word has length 27 [2021-08-26 02:25:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:12,807 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 148 transitions. [2021-08-26 02:25:12,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 02:25:12,807 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 148 transitions. [2021-08-26 02:25:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 02:25:12,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:12,808 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:12,828 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 02:25:13,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:13,026 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:13,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:13,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1012564704, now seen corresponding path program 1 times [2021-08-26 02:25:13,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:13,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396734811] [2021-08-26 02:25:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:13,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:13,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:13,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396734811] [2021-08-26 02:25:13,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396734811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:13,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269945732] [2021-08-26 02:25:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:13,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:13,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:13,339 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 02:25:13,343 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 02:25:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:13,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-26 02:25:13,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:25:13,943 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 02:25:13,950 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 02:25:14,018 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:25:14,019 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 02:25:14,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:14,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2021-08-26 02:25:14,083 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-26 02:25:14,084 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 27 treesize of output 26 [2021-08-26 02:25:14,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:25:14,522 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 20 treesize of output 16 [2021-08-26 02:25:14,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:25:14,542 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 20 treesize of output 16 [2021-08-26 02:25:14,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:14,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:25:14,593 INFO L354 Elim1Store]: treesize reduction 96, result has 25.6 percent of original size [2021-08-26 02:25:14,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 52 [2021-08-26 02:25:14,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:25:14,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 02:25:14,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 02:25:14,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317571282] [2021-08-26 02:25:14,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 02:25:14,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 02:25:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-26 02:25:14,725 INFO L87 Difference]: Start difference. First operand 119 states and 148 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 02:25:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:15,172 INFO L93 Difference]: Finished difference Result 183 states and 217 transitions. [2021-08-26 02:25:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 02:25:15,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 27 [2021-08-26 02:25:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:15,173 INFO L225 Difference]: With dead ends: 183 [2021-08-26 02:25:15,173 INFO L226 Difference]: Without dead ends: 168 [2021-08-26 02:25:15,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 473.9ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-08-26 02:25:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-08-26 02:25:15,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 138. [2021-08-26 02:25:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.2857142857142858) internal successors, (171), 137 states have internal predecessors, (171), 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 02:25:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 171 transitions. [2021-08-26 02:25:15,179 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 171 transitions. Word has length 27 [2021-08-26 02:25:15,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:15,179 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 171 transitions. [2021-08-26 02:25:15,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 02:25:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 171 transitions. [2021-08-26 02:25:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:25:15,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:15,180 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:15,198 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 02:25:15,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:15,398 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:15,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:15,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1969048463, now seen corresponding path program 1 times [2021-08-26 02:25:15,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:15,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458003364] [2021-08-26 02:25:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:15,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:15,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:15,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458003364] [2021-08-26 02:25:15,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458003364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:15,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690561697] [2021-08-26 02:25:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:15,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:15,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:15,724 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 02:25:15,725 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 02:25:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:16,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-26 02:25:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:25:16,418 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 02:25:16,470 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:25:16,470 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 02:25:16,480 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 27 treesize of output 15 [2021-08-26 02:25:16,491 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 27 treesize of output 15 [2021-08-26 02:25:16,596 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-26 02:25:16,597 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 34 treesize of output 21 [2021-08-26 02:25:16,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:16,607 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:25:16,720 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:25:16,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 160 treesize of output 97 [2021-08-26 02:25:16,752 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:25:16,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 77 [2021-08-26 02:25:16,769 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-26 02:25:16,769 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 72 treesize of output 74 [2021-08-26 02:25:16,933 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:25:16,933 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 314 treesize of output 163 [2021-08-26 02:25:16,974 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:25:16,974 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 235 treesize of output 152 [2021-08-26 02:25:16,978 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 156 treesize of output 140 [2021-08-26 02:25:17,623 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-26 02:25:17,624 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 6 new quantified variables, introduced 3 case distinctions, treesize of input 170 treesize of output 79 [2021-08-26 02:25:17,629 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:25:17,629 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 34 [2021-08-26 02:25:17,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-08-26 02:25:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:17,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690561697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:17,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:25:17,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-26 02:25:17,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543903136] [2021-08-26 02:25:17,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 02:25:17,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:17,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 02:25:17,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-08-26 02:25:17,666 INFO L87 Difference]: Start difference. First operand 138 states and 171 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 02:25:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:19,115 INFO L93 Difference]: Finished difference Result 225 states and 274 transitions. [2021-08-26 02:25:19,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 02:25:19,115 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) Word has length 28 [2021-08-26 02:25:19,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:19,116 INFO L225 Difference]: With dead ends: 225 [2021-08-26 02:25:19,116 INFO L226 Difference]: Without dead ends: 223 [2021-08-26 02:25:19,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 997.5ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-08-26 02:25:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-26 02:25:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 147. [2021-08-26 02:25:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.295774647887324) internal successors, (184), 146 states have internal predecessors, (184), 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 02:25:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 184 transitions. [2021-08-26 02:25:19,123 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 184 transitions. Word has length 28 [2021-08-26 02:25:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:19,124 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 184 transitions. [2021-08-26 02:25:19,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 02:25:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 184 transitions. [2021-08-26 02:25:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:25:19,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:19,125 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:19,143 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 02:25:19,343 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,SelfDestructingSolverStorable11 [2021-08-26 02:25:19,343 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:19,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:19,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1324243399, now seen corresponding path program 1 times [2021-08-26 02:25:19,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:19,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505395236] [2021-08-26 02:25:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:19,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:19,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:19,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505395236] [2021-08-26 02:25:19,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505395236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:19,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973060755] [2021-08-26 02:25:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:19,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:19,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:19,603 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 02:25:19,604 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 02:25:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:20,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-26 02:25:20,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:25:20,391 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 02:25:20,402 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 02:25:20,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:20,511 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-08-26 02:25:20,512 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 41 treesize of output 38 [2021-08-26 02:25:20,536 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:25:20,537 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 02:25:20,611 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-26 02:25:20,611 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 27 treesize of output 26 [2021-08-26 02:25:21,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:25:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:21,076 INFO L354 Elim1Store]: treesize reduction 96, result has 25.6 percent of original size [2021-08-26 02:25:21,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 52 [2021-08-26 02:25:21,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:25:21,123 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 20 treesize of output 16 [2021-08-26 02:25:21,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:25:21,139 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 20 treesize of output 16 [2021-08-26 02:25:21,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:25:21,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 02:25:21,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 02:25:21,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696720119] [2021-08-26 02:25:21,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 02:25:21,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:21,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 02:25:21,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-26 02:25:21,238 INFO L87 Difference]: Start difference. First operand 147 states and 184 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 02:25:21,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:21,731 INFO L93 Difference]: Finished difference Result 177 states and 214 transitions. [2021-08-26 02:25:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 02:25:21,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) Word has length 28 [2021-08-26 02:25:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:21,732 INFO L225 Difference]: With dead ends: 177 [2021-08-26 02:25:21,733 INFO L226 Difference]: Without dead ends: 175 [2021-08-26 02:25:21,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 499.0ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-08-26 02:25:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-26 02:25:21,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 147. [2021-08-26 02:25:21,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.2887323943661972) internal successors, (183), 146 states have internal predecessors, (183), 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 02:25:21,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 183 transitions. [2021-08-26 02:25:21,742 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 183 transitions. Word has length 28 [2021-08-26 02:25:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:21,742 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 183 transitions. [2021-08-26 02:25:21,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 02:25:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 183 transitions. [2021-08-26 02:25:21,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 02:25:21,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:21,743 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:21,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 02:25:21,960 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,SelfDestructingSolverStorable12 [2021-08-26 02:25:21,960 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:21,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1357611052, now seen corresponding path program 2 times [2021-08-26 02:25:21,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:21,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553874646] [2021-08-26 02:25:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:21,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:22,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:22,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553874646] [2021-08-26 02:25:22,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553874646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:22,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976245062] [2021-08-26 02:25:22,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:25:22,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:22,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:22,319 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 02:25:22,321 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 02:25:23,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:25:23,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:25:23,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-26 02:25:23,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:25:23,207 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 02:25:23,264 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:25:23,265 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 02:25:23,276 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 27 treesize of output 15 [2021-08-26 02:25:23,286 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 27 treesize of output 15 [2021-08-26 02:25:23,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:23,397 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:25:23,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 02:25:23,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:23,423 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:25:23,600 INFO L354 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2021-08-26 02:25:23,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 202 treesize of output 131 [2021-08-26 02:25:23,634 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:25:23,634 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 4 case distinctions, treesize of input 166 treesize of output 136 [2021-08-26 02:25:23,638 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 130 treesize of output 106 [2021-08-26 02:25:23,671 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:25:23,672 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 103 treesize of output 118 [2021-08-26 02:25:23,685 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-08-26 02:25:23,685 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 109 treesize of output 97 [2021-08-26 02:25:23,917 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-08-26 02:25:23,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 123 treesize of output 100 [2021-08-26 02:25:23,947 INFO L354 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2021-08-26 02:25:23,948 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 104 treesize of output 94 [2021-08-26 02:25:23,963 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-08-26 02:25:23,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 84 [2021-08-26 02:25:24,221 INFO L354 Elim1Store]: treesize reduction 164, result has 11.8 percent of original size [2021-08-26 02:25:24,222 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 6 new quantified variables, introduced 7 case distinctions, treesize of input 370 treesize of output 184 [2021-08-26 02:25:24,282 INFO L354 Elim1Store]: treesize reduction 272, result has 11.1 percent of original size [2021-08-26 02:25:24,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 302 treesize of output 214 [2021-08-26 02:25:24,339 INFO L354 Elim1Store]: treesize reduction 404, result has 12.9 percent of original size [2021-08-26 02:25:24,339 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 4 case distinctions, treesize of input 243 treesize of output 193 [2021-08-26 02:25:24,365 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-26 02:25:24,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 168 [2021-08-26 02:25:24,611 INFO L354 Elim1Store]: treesize reduction 212, result has 12.0 percent of original size [2021-08-26 02:25:24,612 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 10 new quantified variables, introduced 10 case distinctions, treesize of input 561 treesize of output 211 [2021-08-26 02:25:24,674 INFO L354 Elim1Store]: treesize reduction 300, result has 12.0 percent of original size [2021-08-26 02:25:24,674 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 442 treesize of output 270 [2021-08-26 02:25:24,706 INFO L354 Elim1Store]: treesize reduction 316, result has 10.5 percent of original size [2021-08-26 02:25:24,706 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 323 treesize of output 305 [2021-08-26 02:25:25,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:25:25,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 23 [2021-08-26 02:25:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:25,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976245062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:25,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:25:25,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-26 02:25:25,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818476676] [2021-08-26 02:25:25,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 02:25:25,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:25,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 02:25:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:25:25,412 INFO L87 Difference]: Start difference. First operand 147 states and 183 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:27,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:27,046 INFO L93 Difference]: Finished difference Result 332 states and 409 transitions. [2021-08-26 02:25:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 02:25:27,047 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-26 02:25:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:27,048 INFO L225 Difference]: With dead ends: 332 [2021-08-26 02:25:27,048 INFO L226 Difference]: Without dead ends: 277 [2021-08-26 02:25:27,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1530.7ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-08-26 02:25:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-08-26 02:25:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 158. [2021-08-26 02:25:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 157 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:27,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 197 transitions. [2021-08-26 02:25:27,055 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 197 transitions. Word has length 29 [2021-08-26 02:25:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:27,056 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 197 transitions. [2021-08-26 02:25:27,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 197 transitions. [2021-08-26 02:25:27,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 02:25:27,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:27,056 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:27,075 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 02:25:27,274 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,SelfDestructingSolverStorable13 [2021-08-26 02:25:27,275 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:27,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:27,275 INFO L82 PathProgramCache]: Analyzing trace with hash 580376496, now seen corresponding path program 2 times [2021-08-26 02:25:27,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:27,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73850499] [2021-08-26 02:25:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:27,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:27,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:27,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73850499] [2021-08-26 02:25:27,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73850499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:27,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048820389] [2021-08-26 02:25:27,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:25:27,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:27,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:27,682 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 02:25:27,683 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 02:25:28,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:25:28,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:25:28,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-26 02:25:28,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:25:28,713 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 02:25:28,765 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:25:28,765 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 02:25:28,775 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 27 treesize of output 15 [2021-08-26 02:25:28,786 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 27 treesize of output 15 [2021-08-26 02:25:28,890 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 02:25:28,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:28,900 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:25:28,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:28,914 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:25:29,084 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:25:29,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 233 treesize of output 154 [2021-08-26 02:25:29,128 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:25:29,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 189 treesize of output 138 [2021-08-26 02:25:29,166 INFO L354 Elim1Store]: treesize reduction 172, result has 16.1 percent of original size [2021-08-26 02:25:29,167 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 2 case distinctions, treesize of input 150 treesize of output 113 [2021-08-26 02:25:29,204 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:25:29,204 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 95 treesize of output 110 [2021-08-26 02:25:29,419 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-08-26 02:25:29,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 138 treesize of output 111 [2021-08-26 02:25:29,446 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-08-26 02:25:29,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 104 [2021-08-26 02:25:29,460 INFO L354 Elim1Store]: treesize reduction 59, result has 22.4 percent of original size [2021-08-26 02:25:29,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 99 [2021-08-26 02:25:29,711 INFO L354 Elim1Store]: treesize reduction 204, result has 11.3 percent of original size [2021-08-26 02:25:29,712 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 6 new quantified variables, introduced 7 case distinctions, treesize of input 481 treesize of output 219 [2021-08-26 02:25:29,772 INFO L354 Elim1Store]: treesize reduction 204, result has 11.3 percent of original size [2021-08-26 02:25:29,772 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 6 new quantified variables, introduced 7 case distinctions, treesize of input 389 treesize of output 227 [2021-08-26 02:25:29,802 INFO L354 Elim1Store]: treesize reduction 300, result has 14.5 percent of original size [2021-08-26 02:25:29,802 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 297 treesize of output 228 [2021-08-26 02:25:29,831 INFO L354 Elim1Store]: treesize reduction 212, result has 19.4 percent of original size [2021-08-26 02:25:29,832 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 222 treesize of output 213 [2021-08-26 02:25:29,857 INFO L354 Elim1Store]: treesize reduction 68, result has 29.9 percent of original size [2021-08-26 02:25:29,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 211 [2021-08-26 02:25:30,111 INFO L354 Elim1Store]: treesize reduction 256, result has 11.4 percent of original size [2021-08-26 02:25:30,112 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 10 new quantified variables, introduced 10 case distinctions, treesize of input 748 treesize of output 254 [2021-08-26 02:25:30,173 INFO L354 Elim1Store]: treesize reduction 256, result has 11.4 percent of original size [2021-08-26 02:25:30,173 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 10 new quantified variables, introduced 10 case distinctions, treesize of input 589 treesize of output 283 [2021-08-26 02:25:30,204 INFO L354 Elim1Store]: treesize reduction 436, result has 10.5 percent of original size [2021-08-26 02:25:30,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 430 treesize of output 404 [2021-08-26 02:25:31,069 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-08-26 02:25:31,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 6 case distinctions, treesize of input 412 treesize of output 143 [2021-08-26 02:25:31,105 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-08-26 02:25:31,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 67 [2021-08-26 02:25:31,236 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-26 02:25:31,237 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 49 treesize of output 25 [2021-08-26 02:25:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:31,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048820389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:31,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:25:31,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-26 02:25:31,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976371273] [2021-08-26 02:25:31,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 02:25:31,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:31,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 02:25:31,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-08-26 02:25:31,247 INFO L87 Difference]: Start difference. First operand 158 states and 197 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:44,961 INFO L93 Difference]: Finished difference Result 286 states and 357 transitions. [2021-08-26 02:25:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 02:25:44,962 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-26 02:25:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:44,963 INFO L225 Difference]: With dead ends: 286 [2021-08-26 02:25:44,963 INFO L226 Difference]: Without dead ends: 284 [2021-08-26 02:25:44,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 3126.0ms TimeCoverageRelationStatistics Valid=165, Invalid=1166, Unknown=1, NotChecked=0, Total=1332 [2021-08-26 02:25:44,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-08-26 02:25:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 158. [2021-08-26 02:25:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 157 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 197 transitions. [2021-08-26 02:25:44,970 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 197 transitions. Word has length 29 [2021-08-26 02:25:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:44,970 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 197 transitions. [2021-08-26 02:25:44,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 197 transitions. [2021-08-26 02:25:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 02:25:44,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:44,971 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:44,995 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 02:25:45,171 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,SelfDestructingSolverStorable14 [2021-08-26 02:25:45,172 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:45,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1287719083, now seen corresponding path program 1 times [2021-08-26 02:25:45,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:45,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124398405] [2021-08-26 02:25:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:45,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:25:45,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:45,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124398405] [2021-08-26 02:25:45,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124398405] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:25:45,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:25:45,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:25:45,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033126492] [2021-08-26 02:25:45,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:25:45,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:45,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:25:45,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:25:45,215 INFO L87 Difference]: Start difference. First operand 158 states and 197 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 02:25:45,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:45,298 INFO L93 Difference]: Finished difference Result 181 states and 222 transitions. [2021-08-26 02:25:45,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:25:45,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 30 [2021-08-26 02:25:45,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:45,300 INFO L225 Difference]: With dead ends: 181 [2021-08-26 02:25:45,300 INFO L226 Difference]: Without dead ends: 165 [2021-08-26 02:25:45,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:25:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-26 02:25:45,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2021-08-26 02:25:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.2848101265822784) internal successors, (203), 162 states have internal predecessors, (203), 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 02:25:45,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 203 transitions. [2021-08-26 02:25:45,308 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 203 transitions. Word has length 30 [2021-08-26 02:25:45,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:45,308 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 203 transitions. [2021-08-26 02:25:45,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 02:25:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 203 transitions. [2021-08-26 02:25:45,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 02:25:45,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:45,309 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:45,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-26 02:25:45,309 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:45,309 INFO L82 PathProgramCache]: Analyzing trace with hash 478372457, now seen corresponding path program 1 times [2021-08-26 02:25:45,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:45,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078432061] [2021-08-26 02:25:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:45,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:25:45,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:45,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078432061] [2021-08-26 02:25:45,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078432061] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:25:45,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:25:45,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 02:25:45,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781076033] [2021-08-26 02:25:45,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 02:25:45,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:45,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 02:25:45,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:25:45,380 INFO L87 Difference]: Start difference. First operand 163 states and 203 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 02:25:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:45,544 INFO L93 Difference]: Finished difference Result 213 states and 257 transitions. [2021-08-26 02:25:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:25:45,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 30 [2021-08-26 02:25:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:45,545 INFO L225 Difference]: With dead ends: 213 [2021-08-26 02:25:45,545 INFO L226 Difference]: Without dead ends: 175 [2021-08-26 02:25:45,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:25:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-26 02:25:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 159. [2021-08-26 02:25:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.2792207792207793) internal successors, (197), 158 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:25:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 197 transitions. [2021-08-26 02:25:45,556 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 197 transitions. Word has length 30 [2021-08-26 02:25:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:45,556 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 197 transitions. [2021-08-26 02:25:45,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 02:25:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 197 transitions. [2021-08-26 02:25:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 02:25:45,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:45,557 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:45,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-26 02:25:45,557 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:45,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1741468230, now seen corresponding path program 1 times [2021-08-26 02:25:45,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:45,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637889033] [2021-08-26 02:25:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:45,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:45,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:45,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637889033] [2021-08-26 02:25:45,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637889033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:45,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860282455] [2021-08-26 02:25:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:45,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:45,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:45,761 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 02:25:45,761 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 02:25:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:46,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-26 02:25:46,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:25:46,950 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 02:25:47,002 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-26 02:25:47,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-08-26 02:25:47,023 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 02:25:47,024 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 02:25:47,032 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 27 treesize of output 15 [2021-08-26 02:25:47,137 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-08-26 02:25:47,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 107 [2021-08-26 02:25:47,140 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 103 treesize of output 95 [2021-08-26 02:25:47,162 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-26 02:25:47,163 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 83 [2021-08-26 02:25:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:47,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860282455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:47,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:25:47,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-26 02:25:47,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620579133] [2021-08-26 02:25:47,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 02:25:47,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:47,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 02:25:47,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-08-26 02:25:47,453 INFO L87 Difference]: Start difference. First operand 159 states and 197 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 02:25:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:25:48,073 INFO L93 Difference]: Finished difference Result 204 states and 247 transitions. [2021-08-26 02:25:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 02:25:48,073 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 30 [2021-08-26 02:25:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:25:48,074 INFO L225 Difference]: With dead ends: 204 [2021-08-26 02:25:48,074 INFO L226 Difference]: Without dead ends: 165 [2021-08-26 02:25:48,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:25:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-26 02:25:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 157. [2021-08-26 02:25:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.2763157894736843) internal successors, (194), 156 states have internal predecessors, (194), 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 02:25:48,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 194 transitions. [2021-08-26 02:25:48,081 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 194 transitions. Word has length 30 [2021-08-26 02:25:48,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:25:48,082 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 194 transitions. [2021-08-26 02:25:48,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 02:25:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 194 transitions. [2021-08-26 02:25:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 02:25:48,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:25:48,082 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:25:48,105 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 02:25:48,301 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,SelfDestructingSolverStorable17 [2021-08-26 02:25:48,301 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:25:48,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:25:48,302 INFO L82 PathProgramCache]: Analyzing trace with hash 497486487, now seen corresponding path program 2 times [2021-08-26 02:25:48,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:25:48,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555267340] [2021-08-26 02:25:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:25:48,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:25:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:25:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:48,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:25:48,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555267340] [2021-08-26 02:25:48,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555267340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:48,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466662798] [2021-08-26 02:25:48,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:25:48,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:25:48,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:25:48,542 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 02:25:48,543 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 02:25:49,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:25:49,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:25:49,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-26 02:25:49,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:25:49,770 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 02:25:49,836 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:25:49,836 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 02:25:49,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:25:49,855 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 27 treesize of output 15 [2021-08-26 02:25:49,964 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-26 02:25:49,964 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 34 treesize of output 21 [2021-08-26 02:25:49,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:25:49,976 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:25:50,072 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:25:50,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 160 treesize of output 97 [2021-08-26 02:25:50,104 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:25:50,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 77 [2021-08-26 02:25:50,120 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-26 02:25:50,120 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 72 treesize of output 74 [2021-08-26 02:25:50,258 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:25:50,258 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 265 treesize of output 142 [2021-08-26 02:25:50,295 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:25:50,296 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 123 [2021-08-26 02:25:50,805 INFO L354 Elim1Store]: treesize reduction 82, result has 3.5 percent of original size [2021-08-26 02:25:50,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 94 [2021-08-26 02:25:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:25:50,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466662798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:25:50,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:25:50,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-26 02:25:50,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308539786] [2021-08-26 02:25:50,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 02:25:50,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:25:50,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 02:25:50,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:25:50,916 INFO L87 Difference]: Start difference. First operand 157 states and 194 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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 02:26:04,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:04,110 INFO L93 Difference]: Finished difference Result 266 states and 319 transitions. [2021-08-26 02:26:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 02:26:04,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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 31 [2021-08-26 02:26:04,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:04,112 INFO L225 Difference]: With dead ends: 266 [2021-08-26 02:26:04,112 INFO L226 Difference]: Without dead ends: 218 [2021-08-26 02:26:04,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 952.2ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 02:26:04,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-26 02:26:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 159. [2021-08-26 02:26:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.2727272727272727) internal successors, (196), 158 states have internal predecessors, (196), 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 02:26:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 196 transitions. [2021-08-26 02:26:04,120 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 196 transitions. Word has length 31 [2021-08-26 02:26:04,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:04,120 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 196 transitions. [2021-08-26 02:26:04,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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 02:26:04,120 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 196 transitions. [2021-08-26 02:26:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 02:26:04,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:04,121 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:04,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:04,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:04,342 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:26:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:04,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1359257348, now seen corresponding path program 3 times [2021-08-26 02:26:04,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:04,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776334763] [2021-08-26 02:26:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:04,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:04,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:04,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776334763] [2021-08-26 02:26:04,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776334763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:04,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544945556] [2021-08-26 02:26:04,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:26:04,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:04,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:04,809 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 02:26:04,810 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 02:26:06,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 02:26:06,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:26:06,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-26 02:26:06,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:06,157 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 02:26:06,207 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:26:06,207 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 27 treesize of output 19 [2021-08-26 02:26:06,237 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:06,237 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 02:26:06,248 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 27 treesize of output 15 [2021-08-26 02:26:06,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:06,362 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:06,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:06,371 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:06,479 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:26:06,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 173 treesize of output 110 [2021-08-26 02:26:06,507 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:26:06,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 86 [2021-08-26 02:26:06,540 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:26:06,540 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 85 treesize of output 100 [2021-08-26 02:26:06,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:06,733 INFO L354 Elim1Store]: treesize reduction 79, result has 12.2 percent of original size [2021-08-26 02:26:06,733 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 107 treesize of output 88 [2021-08-26 02:26:06,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:06,751 INFO L354 Elim1Store]: treesize reduction 79, result has 12.2 percent of original size [2021-08-26 02:26:06,752 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 88 treesize of output 73 [2021-08-26 02:26:06,779 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 13 treesize of output 9 [2021-08-26 02:26:07,000 INFO L354 Elim1Store]: treesize reduction 140, result has 13.6 percent of original size [2021-08-26 02:26:07,001 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 6 new quantified variables, introduced 7 case distinctions, treesize of input 370 treesize of output 184 [2021-08-26 02:26:07,058 INFO L354 Elim1Store]: treesize reduction 248, result has 12.1 percent of original size [2021-08-26 02:26:07,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 302 treesize of output 206 [2021-08-26 02:26:07,102 INFO L354 Elim1Store]: treesize reduction 252, result has 16.3 percent of original size [2021-08-26 02:26:07,102 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 2 case distinctions, treesize of input 243 treesize of output 190 [2021-08-26 02:26:07,131 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-26 02:26:07,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 168 [2021-08-26 02:26:07,381 INFO L354 Elim1Store]: treesize reduction 89, result has 7.3 percent of original size [2021-08-26 02:26:07,381 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 8 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 142 [2021-08-26 02:26:07,434 INFO L354 Elim1Store]: treesize reduction 161, result has 8.5 percent of original size [2021-08-26 02:26:07,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 331 treesize of output 225 [2021-08-26 02:26:07,449 INFO L354 Elim1Store]: treesize reduction 119, result has 17.4 percent of original size [2021-08-26 02:26:07,449 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 256 treesize of output 235 [2021-08-26 02:26:08,225 INFO L354 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2021-08-26 02:26:08,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 255 treesize of output 138 [2021-08-26 02:26:08,244 INFO L354 Elim1Store]: treesize reduction 49, result has 14.0 percent of original size [2021-08-26 02:26:08,245 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 113 treesize of output 86 [2021-08-26 02:26:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:08,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544945556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:08,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:08,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-26 02:26:08,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471751117] [2021-08-26 02:26:08,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 02:26:08,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:08,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 02:26:08,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-26 02:26:08,370 INFO L87 Difference]: Start difference. First operand 159 states and 196 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:11,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:11,633 INFO L93 Difference]: Finished difference Result 277 states and 333 transitions. [2021-08-26 02:26:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 02:26:11,634 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-26 02:26:11,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:11,635 INFO L225 Difference]: With dead ends: 277 [2021-08-26 02:26:11,635 INFO L226 Difference]: Without dead ends: 235 [2021-08-26 02:26:11,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1345.2ms TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-08-26 02:26:11,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-08-26 02:26:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 175. [2021-08-26 02:26:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.2705882352941176) internal successors, (216), 174 states have internal predecessors, (216), 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 02:26:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 216 transitions. [2021-08-26 02:26:11,644 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 216 transitions. Word has length 32 [2021-08-26 02:26:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:11,644 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 216 transitions. [2021-08-26 02:26:11,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:26:11,645 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 216 transitions. [2021-08-26 02:26:11,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 02:26:11,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:11,645 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:11,665 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 02:26:11,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:11,861 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:26:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:11,861 INFO L82 PathProgramCache]: Analyzing trace with hash -237453958, now seen corresponding path program 4 times [2021-08-26 02:26:11,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:11,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213285656] [2021-08-26 02:26:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:11,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:12,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:12,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213285656] [2021-08-26 02:26:12,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213285656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:12,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957239843] [2021-08-26 02:26:12,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:26:12,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:12,278 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 02:26:12,279 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 02:26:13,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:26:13,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:26:13,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-26 02:26:13,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:13,785 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 02:26:13,836 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:13,837 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 02:26:13,868 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 27 treesize of output 15 [2021-08-26 02:26:13,878 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 27 treesize of output 15 [2021-08-26 02:26:13,985 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-26 02:26:13,985 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 34 treesize of output 21 [2021-08-26 02:26:13,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:13,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:14,096 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:26:14,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 166 treesize of output 103 [2021-08-26 02:26:14,126 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:26:14,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 122 treesize of output 83 [2021-08-26 02:26:14,158 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:26:14,158 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 78 treesize of output 93 [2021-08-26 02:26:14,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:14,334 INFO L354 Elim1Store]: treesize reduction 79, result has 12.2 percent of original size [2021-08-26 02:26:14,335 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 108 treesize of output 85 [2021-08-26 02:26:14,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:14,351 INFO L354 Elim1Store]: treesize reduction 79, result has 12.2 percent of original size [2021-08-26 02:26:14,352 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 89 treesize of output 78 [2021-08-26 02:26:14,386 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 13 treesize of output 9 [2021-08-26 02:26:14,597 INFO L354 Elim1Store]: treesize reduction 204, result has 11.3 percent of original size [2021-08-26 02:26:14,597 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 6 new quantified variables, introduced 7 case distinctions, treesize of input 479 treesize of output 217 [2021-08-26 02:26:14,656 INFO L354 Elim1Store]: treesize reduction 204, result has 11.3 percent of original size [2021-08-26 02:26:14,656 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 6 new quantified variables, introduced 7 case distinctions, treesize of input 387 treesize of output 217 [2021-08-26 02:26:14,660 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 233 treesize of output 185 [2021-08-26 02:26:14,687 INFO L354 Elim1Store]: treesize reduction 68, result has 29.9 percent of original size [2021-08-26 02:26:14,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 186 [2021-08-26 02:26:14,701 INFO L354 Elim1Store]: treesize reduction 65, result has 22.6 percent of original size [2021-08-26 02:26:14,701 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 174 treesize of output 162 [2021-08-26 02:26:14,930 INFO L354 Elim1Store]: treesize reduction 220, result has 13.0 percent of original size [2021-08-26 02:26:14,931 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 476 treesize of output 171 [2021-08-26 02:26:14,988 INFO L354 Elim1Store]: treesize reduction 252, result has 11.6 percent of original size [2021-08-26 02:26:14,988 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 377 treesize of output 256 [2021-08-26 02:26:15,004 INFO L354 Elim1Store]: treesize reduction 129, result has 12.8 percent of original size [2021-08-26 02:26:15,005 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 278 treesize of output 261 [2021-08-26 02:26:16,114 INFO L354 Elim1Store]: treesize reduction 77, result has 4.9 percent of original size [2021-08-26 02:26:16,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 288 treesize of output 100 [2021-08-26 02:26:16,126 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-08-26 02:26:16,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 56 [2021-08-26 02:26:16,189 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-26 02:26:16,189 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 14 [2021-08-26 02:26:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:16,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957239843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:16,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:16,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-26 02:26:16,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679783810] [2021-08-26 02:26:16,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:26:16,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:16,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:26:16,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-08-26 02:26:16,199 INFO L87 Difference]: Start difference. First operand 175 states and 216 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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 02:26:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:18,306 INFO L93 Difference]: Finished difference Result 322 states and 396 transitions. [2021-08-26 02:26:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-26 02:26:18,307 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-26 02:26:18,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:18,308 INFO L225 Difference]: With dead ends: 322 [2021-08-26 02:26:18,308 INFO L226 Difference]: Without dead ends: 320 [2021-08-26 02:26:18,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1580.5ms TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 02:26:18,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-08-26 02:26:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 200. [2021-08-26 02:26:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.2820512820512822) internal successors, (250), 199 states have internal predecessors, (250), 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 02:26:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 250 transitions. [2021-08-26 02:26:18,320 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 250 transitions. Word has length 32 [2021-08-26 02:26:18,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:18,320 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 250 transitions. [2021-08-26 02:26:18,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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 02:26:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 250 transitions. [2021-08-26 02:26:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-26 02:26:18,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:18,321 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:18,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-26 02:26:18,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:18,539 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:26:18,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:18,539 INFO L82 PathProgramCache]: Analyzing trace with hash -620358001, now seen corresponding path program 1 times [2021-08-26 02:26:18,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:18,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614118114] [2021-08-26 02:26:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:18,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:18,752 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 02:26:18,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:18,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614118114] [2021-08-26 02:26:18,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614118114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:18,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119446953] [2021-08-26 02:26:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:18,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:18,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:18,754 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:26:18,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 02:26:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:20,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 02:26:20,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:20,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 02:26:20,433 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 02:26:20,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:20,535 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-08-26 02:26:20,536 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 41 treesize of output 38 [2021-08-26 02:26:20,568 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:20,568 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 02:26:20,580 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 27 treesize of output 15 [2021-08-26 02:26:20,721 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-26 02:26:20,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 67 [2021-08-26 02:26:20,734 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-26 02:26:20,734 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 59 treesize of output 54 [2021-08-26 02:26:21,336 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:26:21,337 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 28 [2021-08-26 02:26:21,598 INFO L354 Elim1Store]: treesize reduction 178, result has 13.6 percent of original size [2021-08-26 02:26:21,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 49 [2021-08-26 02:26:21,615 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-26 02:26:21,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 45 [2021-08-26 02:26:21,721 INFO L354 Elim1Store]: treesize reduction 136, result has 20.0 percent of original size [2021-08-26 02:26:21,721 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 55 treesize of output 55 [2021-08-26 02:26:21,897 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-26 02:26:21,897 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 14 [2021-08-26 02:26:21,905 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 02:26:21,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119446953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:21,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:21,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-26 02:26:21,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840252395] [2021-08-26 02:26:21,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:26:21,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:21,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:26:21,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-26 02:26:21,906 INFO L87 Difference]: Start difference. First operand 200 states and 250 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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 02:26:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:23,418 INFO L93 Difference]: Finished difference Result 410 states and 484 transitions. [2021-08-26 02:26:23,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-26 02:26:23,419 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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 33 [2021-08-26 02:26:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:23,420 INFO L225 Difference]: With dead ends: 410 [2021-08-26 02:26:23,420 INFO L226 Difference]: Without dead ends: 406 [2021-08-26 02:26:23,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1176.0ms TimeCoverageRelationStatistics Valid=297, Invalid=1185, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 02:26:23,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-08-26 02:26:23,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 220. [2021-08-26 02:26:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.283720930232558) internal successors, (276), 219 states have internal predecessors, (276), 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 02:26:23,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 276 transitions. [2021-08-26 02:26:23,434 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 276 transitions. Word has length 33 [2021-08-26 02:26:23,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:23,434 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 276 transitions. [2021-08-26 02:26:23,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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 02:26:23,434 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 276 transitions. [2021-08-26 02:26:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-26 02:26:23,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:23,435 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:23,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:23,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-26 02:26:23,653 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:26:23,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:23,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1429704627, now seen corresponding path program 1 times [2021-08-26 02:26:23,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:23,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952961848] [2021-08-26 02:26:23,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:23,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:23,832 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 02:26:23,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:23,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952961848] [2021-08-26 02:26:23,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952961848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:23,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324783078] [2021-08-26 02:26:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:23,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:23,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:23,834 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:26:23,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 02:26:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:25,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-26 02:26:25,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:25,641 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 02:26:25,704 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:25,704 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 02:26:25,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-26 02:26:25,824 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-26 02:26:25,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 45 [2021-08-26 02:26:26,461 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-26 02:26:26,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 337 treesize of output 236 [2021-08-26 02:26:26,483 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-26 02:26:26,483 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 227 treesize of output 229 [2021-08-26 02:26:26,498 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-26 02:26:26,499 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 212 treesize of output 196 [2021-08-26 02:26:26,502 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 206 treesize of output 198 [2021-08-26 02:26:26,552 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 02:26:26,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324783078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:26,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:26,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-26 02:26:26,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400775616] [2021-08-26 02:26:26,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 02:26:26,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:26,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 02:26:26,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-26 02:26:26,553 INFO L87 Difference]: Start difference. First operand 220 states and 276 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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 02:26:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:28,146 INFO L93 Difference]: Finished difference Result 350 states and 416 transitions. [2021-08-26 02:26:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 02:26:28,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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 33 [2021-08-26 02:26:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:28,148 INFO L225 Difference]: With dead ends: 350 [2021-08-26 02:26:28,148 INFO L226 Difference]: Without dead ends: 305 [2021-08-26 02:26:28,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 869.0ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-08-26 02:26:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-08-26 02:26:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 222. [2021-08-26 02:26:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.271889400921659) internal successors, (276), 221 states have internal predecessors, (276), 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 02:26:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 276 transitions. [2021-08-26 02:26:28,166 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 276 transitions. Word has length 33 [2021-08-26 02:26:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:28,167 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 276 transitions. [2021-08-26 02:26:28,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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 02:26:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 276 transitions. [2021-08-26 02:26:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 02:26:28,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:28,168 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:28,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:28,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:28,391 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:26:28,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:28,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1373256028, now seen corresponding path program 1 times [2021-08-26 02:26:28,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:28,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301289555] [2021-08-26 02:26:28,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:28,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:28,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:28,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301289555] [2021-08-26 02:26:28,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301289555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:28,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699956984] [2021-08-26 02:26:28,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:28,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:28,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:28,667 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:26:28,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 02:26:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:30,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-26 02:26:30,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:30,550 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 02:26:30,623 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:26:30,624 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 27 treesize of output 15 [2021-08-26 02:26:30,681 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-26 02:26:30,682 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 27 treesize of output 23 [2021-08-26 02:26:30,729 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:30,729 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 02:26:30,842 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-26 02:26:30,842 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 34 treesize of output 21 [2021-08-26 02:26:30,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:30,858 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:30,954 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:26:30,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 160 treesize of output 97 [2021-08-26 02:26:30,985 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:26:30,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 77 [2021-08-26 02:26:31,002 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-26 02:26:31,002 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 72 treesize of output 74 [2021-08-26 02:26:31,143 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:26:31,144 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 265 treesize of output 142 [2021-08-26 02:26:31,181 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:26:31,181 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 123 [2021-08-26 02:26:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:31,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699956984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:31,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:31,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-26 02:26:31,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462066484] [2021-08-26 02:26:31,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 02:26:31,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:31,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 02:26:31,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:26:31,905 INFO L87 Difference]: Start difference. First operand 222 states and 276 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 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 02:26:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:26:47,536 INFO L93 Difference]: Finished difference Result 313 states and 381 transitions. [2021-08-26 02:26:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 02:26:47,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 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 02:26:47,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:26:47,538 INFO L225 Difference]: With dead ends: 313 [2021-08-26 02:26:47,538 INFO L226 Difference]: Without dead ends: 271 [2021-08-26 02:26:47,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1264.3ms TimeCoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 02:26:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-08-26 02:26:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 234. [2021-08-26 02:26:47,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.275109170305677) internal successors, (292), 233 states have internal predecessors, (292), 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 02:26:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 292 transitions. [2021-08-26 02:26:47,555 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 292 transitions. Word has length 34 [2021-08-26 02:26:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:26:47,555 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 292 transitions. [2021-08-26 02:26:47,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 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 02:26:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 292 transitions. [2021-08-26 02:26:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 02:26:47,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:26:47,556 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:26:47,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-26 02:26:47,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:47,776 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:26:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:26:47,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1159083761, now seen corresponding path program 1 times [2021-08-26 02:26:47,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:26:47,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657130589] [2021-08-26 02:26:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:47,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:26:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:48,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:26:48,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657130589] [2021-08-26 02:26:48,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657130589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:48,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857269032] [2021-08-26 02:26:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:26:48,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:26:48,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:26:48,150 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:26:48,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 02:26:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:26:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-26 02:26:50,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:26:50,188 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 02:26:50,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 02:26:50,264 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-26 02:26:50,264 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 27 treesize of output 23 [2021-08-26 02:26:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:50,318 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-08-26 02:26:50,318 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 41 treesize of output 38 [2021-08-26 02:26:50,352 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:26:50,352 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 02:26:50,443 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 02:26:50,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:26:50,459 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:26:50,598 INFO L354 Elim1Store]: treesize reduction 90, result has 14.3 percent of original size [2021-08-26 02:26:50,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 152 treesize of output 101 [2021-08-26 02:26:50,652 INFO L354 Elim1Store]: treesize reduction 224, result has 13.2 percent of original size [2021-08-26 02:26:50,652 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 4 case distinctions, treesize of input 121 treesize of output 91 [2021-08-26 02:26:50,685 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:26:50,685 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 74 treesize of output 89 [2021-08-26 02:26:50,948 INFO L354 Elim1Store]: treesize reduction 130, result has 14.5 percent of original size [2021-08-26 02:26:50,948 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 99 [2021-08-26 02:26:50,974 INFO L354 Elim1Store]: treesize reduction 132, result has 14.8 percent of original size [2021-08-26 02:26:50,975 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 125 treesize of output 119 [2021-08-26 02:26:51,676 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:26:51,677 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 53 [2021-08-26 02:26:52,141 INFO L354 Elim1Store]: treesize reduction 286, result has 11.5 percent of original size [2021-08-26 02:26:52,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 74 [2021-08-26 02:26:52,174 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-08-26 02:26:52,174 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 65 treesize of output 69 [2021-08-26 02:26:52,479 INFO L354 Elim1Store]: treesize reduction 386, result has 11.5 percent of original size [2021-08-26 02:26:52,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 92 treesize of output 86 [2021-08-26 02:26:52,952 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-26 02:26:52,953 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 45 treesize of output 25 [2021-08-26 02:26:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:26:52,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857269032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:26:52,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:26:52,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-26 02:26:52,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308707868] [2021-08-26 02:26:52,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 02:26:52,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:26:52,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 02:26:52,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-26 02:26:52,962 INFO L87 Difference]: Start difference. First operand 234 states and 292 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 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 02:27:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:42,278 INFO L93 Difference]: Finished difference Result 425 states and 505 transitions. [2021-08-26 02:27:42,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-26 02:27:42,279 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 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 02:27:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:42,280 INFO L225 Difference]: With dead ends: 425 [2021-08-26 02:27:42,280 INFO L226 Difference]: Without dead ends: 421 [2021-08-26 02:27:42,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 26491.8ms TimeCoverageRelationStatistics Valid=416, Invalid=2022, Unknown=12, NotChecked=0, Total=2450 [2021-08-26 02:27:42,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-08-26 02:27:42,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 234. [2021-08-26 02:27:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.275109170305677) internal successors, (292), 233 states have internal predecessors, (292), 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 02:27:42,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 292 transitions. [2021-08-26 02:27:42,296 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 292 transitions. Word has length 34 [2021-08-26 02:27:42,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:42,296 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 292 transitions. [2021-08-26 02:27:42,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 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 02:27:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 292 transitions. [2021-08-26 02:27:42,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 02:27:42,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:42,297 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:42,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 02:27:42,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:42,536 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:27:42,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:42,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2051720200, now seen corresponding path program 1 times [2021-08-26 02:27:42,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:42,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651197740] [2021-08-26 02:27:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:42,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:42,772 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 02:27:42,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:42,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651197740] [2021-08-26 02:27:42,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651197740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:42,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30999622] [2021-08-26 02:27:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:42,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:42,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:42,774 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:27:42,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 02:27:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:44,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-26 02:27:44,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:44,994 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 02:27:45,001 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 02:27:45,081 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-26 02:27:45,082 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 27 treesize of output 23 [2021-08-26 02:27:45,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:45,135 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-08-26 02:27:45,135 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 41 treesize of output 38 [2021-08-26 02:27:45,165 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:27:45,166 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 02:27:45,309 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-26 02:27:45,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 67 [2021-08-26 02:27:45,322 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-08-26 02:27:45,323 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 59 treesize of output 54 [2021-08-26 02:27:45,896 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:27:45,897 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 28 [2021-08-26 02:27:46,159 INFO L354 Elim1Store]: treesize reduction 178, result has 13.6 percent of original size [2021-08-26 02:27:46,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 49 [2021-08-26 02:27:46,176 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-26 02:27:46,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 45 [2021-08-26 02:27:46,281 INFO L354 Elim1Store]: treesize reduction 136, result has 20.0 percent of original size [2021-08-26 02:27:46,282 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 55 treesize of output 55 [2021-08-26 02:27:46,500 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-26 02:27:46,500 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 14 [2021-08-26 02:27:46,526 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 02:27:46,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30999622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:46,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:46,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-26 02:27:46,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086238329] [2021-08-26 02:27:46,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-26 02:27:46,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:46,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-26 02:27:46,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-08-26 02:27:46,529 INFO L87 Difference]: Start difference. First operand 234 states and 292 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 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 02:27:48,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:27:48,171 INFO L93 Difference]: Finished difference Result 413 states and 488 transitions. [2021-08-26 02:27:48,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-26 02:27:48,172 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 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 02:27:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:27:48,173 INFO L225 Difference]: With dead ends: 413 [2021-08-26 02:27:48,173 INFO L226 Difference]: Without dead ends: 408 [2021-08-26 02:27:48,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1253.0ms TimeCoverageRelationStatistics Valid=299, Invalid=1261, Unknown=0, NotChecked=0, Total=1560 [2021-08-26 02:27:48,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-08-26 02:27:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 234. [2021-08-26 02:27:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.275109170305677) internal successors, (292), 233 states have internal predecessors, (292), 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 02:27:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 292 transitions. [2021-08-26 02:27:48,189 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 292 transitions. Word has length 34 [2021-08-26 02:27:48,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:27:48,190 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 292 transitions. [2021-08-26 02:27:48,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 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 02:27:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 292 transitions. [2021-08-26 02:27:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-26 02:27:48,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:27:48,190 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:27:48,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 02:27:48,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-26 02:27:48,409 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:27:48,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:27:48,409 INFO L82 PathProgramCache]: Analyzing trace with hash -927068628, now seen corresponding path program 5 times [2021-08-26 02:27:48,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:27:48,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786471484] [2021-08-26 02:27:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:27:48,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:27:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:27:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:48,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:27:48,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786471484] [2021-08-26 02:27:48,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786471484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:48,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841159202] [2021-08-26 02:27:48,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 02:27:48,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:27:48,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:27:48,892 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:27:48,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 02:27:51,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-26 02:27:51,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:27:51,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 75 conjunts are in the unsatisfiable core [2021-08-26 02:27:51,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:27:51,344 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 02:27:51,391 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:27:51,391 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 27 treesize of output 19 [2021-08-26 02:27:51,412 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:27:51,412 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 27 treesize of output 15 [2021-08-26 02:27:51,440 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:27:51,441 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 02:27:51,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:51,575 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:27:51,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:51,593 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:27:51,700 INFO L354 Elim1Store]: treesize reduction 58, result has 20.5 percent of original size [2021-08-26 02:27:51,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 149 treesize of output 94 [2021-08-26 02:27:51,731 INFO L354 Elim1Store]: treesize reduction 82, result has 18.8 percent of original size [2021-08-26 02:27:51,732 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 4 case distinctions, treesize of input 113 treesize of output 83 [2021-08-26 02:27:51,766 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:27:51,766 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 77 treesize of output 92 [2021-08-26 02:27:51,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:51,957 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-26 02:27:51,957 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 2 case distinctions, treesize of input 99 treesize of output 80 [2021-08-26 02:27:51,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:27:51,966 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:27:51,966 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 2 case distinctions, treesize of input 80 treesize of output 70 [2021-08-26 02:27:52,159 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-08-26 02:27:52,160 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 5 new quantified variables, introduced 7 case distinctions, treesize of input 227 treesize of output 114 [2021-08-26 02:27:52,203 INFO L354 Elim1Store]: treesize reduction 216, result has 13.6 percent of original size [2021-08-26 02:27:52,204 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 7 case distinctions, treesize of input 175 treesize of output 132 [2021-08-26 02:27:52,229 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-26 02:27:52,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 127 [2021-08-26 02:27:52,440 INFO L354 Elim1Store]: treesize reduction 188, result has 13.4 percent of original size [2021-08-26 02:27:52,441 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 363 treesize of output 162 [2021-08-26 02:27:52,445 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 284 treesize of output 268 [2021-08-26 02:27:52,498 INFO L354 Elim1Store]: treesize reduction 412, result has 11.4 percent of original size [2021-08-26 02:27:52,499 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 6 new quantified variables, introduced 10 case distinctions, treesize of input 268 treesize of output 210 [2021-08-26 02:27:55,760 INFO L354 Elim1Store]: treesize reduction 154, result has 11.0 percent of original size [2021-08-26 02:27:55,761 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 213 treesize of output 110 [2021-08-26 02:27:55,804 INFO L354 Elim1Store]: treesize reduction 142, result has 4.7 percent of original size [2021-08-26 02:27:55,804 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 8 new quantified variables, introduced 15 case distinctions, treesize of input 75 treesize of output 59 [2021-08-26 02:27:55,831 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 02:27:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:27:55,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841159202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:27:55,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:27:55,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-08-26 02:27:55,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847792981] [2021-08-26 02:27:55,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:27:55,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:27:55,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:27:55,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=369, Unknown=1, NotChecked=0, Total=420 [2021-08-26 02:27:55,840 INFO L87 Difference]: Start difference. First operand 234 states and 292 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 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 02:28:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:28:01,818 INFO L93 Difference]: Finished difference Result 333 states and 408 transitions. [2021-08-26 02:28:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-26 02:28:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-26 02:28:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:28:01,820 INFO L225 Difference]: With dead ends: 333 [2021-08-26 02:28:01,820 INFO L226 Difference]: Without dead ends: 331 [2021-08-26 02:28:01,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 7585.0ms TimeCoverageRelationStatistics Valid=167, Invalid=1472, Unknown=1, NotChecked=0, Total=1640 [2021-08-26 02:28:01,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-08-26 02:28:01,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 243. [2021-08-26 02:28:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.281512605042017) internal successors, (305), 242 states have internal predecessors, (305), 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 02:28:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 305 transitions. [2021-08-26 02:28:01,839 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 305 transitions. Word has length 35 [2021-08-26 02:28:01,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:28:01,839 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 305 transitions. [2021-08-26 02:28:01,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 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 02:28:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 305 transitions. [2021-08-26 02:28:01,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-26 02:28:01,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:28:01,844 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:28:01,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-26 02:28:02,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-26 02:28:02,065 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:28:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:28:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1572349576, now seen corresponding path program 1 times [2021-08-26 02:28:02,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:28:02,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413993982] [2021-08-26 02:28:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:28:02,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:28:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:28:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:28:02,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:28:02,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413993982] [2021-08-26 02:28:02,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413993982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:02,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084135313] [2021-08-26 02:28:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:28:02,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:28:02,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:28:02,332 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:28:02,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 02:28:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:28:04,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-26 02:28:04,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:28:04,908 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 02:28:04,917 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 02:28:04,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:05,021 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-08-26 02:28:05,021 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 41 treesize of output 38 [2021-08-26 02:28:05,055 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-26 02:28:05,056 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 27 treesize of output 23 [2021-08-26 02:28:05,089 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:28:05,089 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 02:28:05,186 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 02:28:05,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:05,195 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:28:05,356 INFO L354 Elim1Store]: treesize reduction 90, result has 14.3 percent of original size [2021-08-26 02:28:05,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 152 treesize of output 101 [2021-08-26 02:28:05,411 INFO L354 Elim1Store]: treesize reduction 224, result has 13.2 percent of original size [2021-08-26 02:28:05,412 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 4 case distinctions, treesize of input 121 treesize of output 91 [2021-08-26 02:28:05,444 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:28:05,445 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 74 treesize of output 89 [2021-08-26 02:28:05,723 INFO L354 Elim1Store]: treesize reduction 130, result has 14.5 percent of original size [2021-08-26 02:28:05,723 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 99 [2021-08-26 02:28:05,750 INFO L354 Elim1Store]: treesize reduction 132, result has 14.8 percent of original size [2021-08-26 02:28:05,750 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 125 treesize of output 119 [2021-08-26 02:28:06,452 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:28:06,452 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 53 [2021-08-26 02:28:06,938 INFO L354 Elim1Store]: treesize reduction 286, result has 11.5 percent of original size [2021-08-26 02:28:06,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 74 [2021-08-26 02:28:06,962 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-08-26 02:28:06,963 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 65 treesize of output 69 [2021-08-26 02:28:07,172 INFO L354 Elim1Store]: treesize reduction 386, result has 11.5 percent of original size [2021-08-26 02:28:07,172 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 11 case distinctions, treesize of input 92 treesize of output 86 [2021-08-26 02:28:07,750 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-26 02:28:07,751 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 45 treesize of output 25 [2021-08-26 02:28:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:28:07,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084135313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:07,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:28:07,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-26 02:28:07,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54186231] [2021-08-26 02:28:07,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-26 02:28:07,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:28:07,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-26 02:28:07,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-26 02:28:07,780 INFO L87 Difference]: Start difference. First operand 243 states and 305 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:28:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:28:48,999 INFO L93 Difference]: Finished difference Result 474 states and 562 transitions. [2021-08-26 02:28:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-26 02:28:49,000 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-26 02:28:49,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:28:49,001 INFO L225 Difference]: With dead ends: 474 [2021-08-26 02:28:49,001 INFO L226 Difference]: Without dead ends: 466 [2021-08-26 02:28:49,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 12360.1ms TimeCoverageRelationStatistics Valid=447, Invalid=2200, Unknown=5, NotChecked=0, Total=2652 [2021-08-26 02:28:49,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-08-26 02:28:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 233. [2021-08-26 02:28:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.2850877192982457) internal successors, (293), 232 states have internal predecessors, (293), 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 02:28:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 293 transitions. [2021-08-26 02:28:49,022 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 293 transitions. Word has length 35 [2021-08-26 02:28:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:28:49,022 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 293 transitions. [2021-08-26 02:28:49,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:28:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 293 transitions. [2021-08-26 02:28:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 02:28:49,023 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:28:49,023 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:28:49,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-26 02:28:49,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-26 02:28:49,247 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:28:49,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:28:49,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1724174343, now seen corresponding path program 6 times [2021-08-26 02:28:49,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:28:49,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846487998] [2021-08-26 02:28:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:28:49,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:28:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:28:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:28:49,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:28:49,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846487998] [2021-08-26 02:28:49,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846487998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:49,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81121137] [2021-08-26 02:28:49,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 02:28:49,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:28:49,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:28:49,768 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:28:49,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 02:28:52,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-26 02:28:52,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:28:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 90 conjunts are in the unsatisfiable core [2021-08-26 02:28:52,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:28:52,721 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 02:28:52,771 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 02:28:52,772 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 27 treesize of output 15 [2021-08-26 02:28:52,794 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-26 02:28:52,794 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 27 treesize of output 19 [2021-08-26 02:28:52,822 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:28:52,822 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 02:28:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:52,943 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:28:52,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:52,960 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:28:53,061 INFO L354 Elim1Store]: treesize reduction 58, result has 20.5 percent of original size [2021-08-26 02:28:53,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 149 treesize of output 94 [2021-08-26 02:28:53,088 INFO L354 Elim1Store]: treesize reduction 82, result has 18.8 percent of original size [2021-08-26 02:28:53,088 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 4 case distinctions, treesize of input 113 treesize of output 83 [2021-08-26 02:28:53,125 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:28:53,126 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 77 treesize of output 92 [2021-08-26 02:28:53,300 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 02:28:53,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:53,312 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-26 02:28:53,312 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 2 case distinctions, treesize of input 99 treesize of output 80 [2021-08-26 02:28:53,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:53,320 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:28:53,320 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 2 case distinctions, treesize of input 80 treesize of output 70 [2021-08-26 02:28:53,558 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-08-26 02:28:53,558 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 5 new quantified variables, introduced 7 case distinctions, treesize of input 302 treesize of output 157 [2021-08-26 02:28:53,607 INFO L354 Elim1Store]: treesize reduction 216, result has 13.6 percent of original size [2021-08-26 02:28:53,607 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 7 case distinctions, treesize of input 250 treesize of output 207 [2021-08-26 02:28:53,611 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 198 treesize of output 162 [2021-08-26 02:28:53,615 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 159 treesize of output 147 [2021-08-26 02:28:53,669 INFO L354 Elim1Store]: treesize reduction 138, result has 27.4 percent of original size [2021-08-26 02:28:53,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 144 treesize of output 174 [2021-08-26 02:28:53,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:53,903 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-26 02:28:53,904 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 5 case distinctions, treesize of input 171 treesize of output 126 [2021-08-26 02:28:53,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:28:53,912 INFO L354 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2021-08-26 02:28:53,913 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 5 case distinctions, treesize of input 152 treesize of output 145 [2021-08-26 02:28:53,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:28:53,926 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-08-26 02:28:53,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 132 [2021-08-26 02:28:54,302 INFO L354 Elim1Store]: treesize reduction 210, result has 12.1 percent of original size [2021-08-26 02:28:54,302 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 8 new quantified variables, introduced 11 case distinctions, treesize of input 541 treesize of output 217 [2021-08-26 02:28:54,393 INFO L354 Elim1Store]: treesize reduction 474, result has 10.1 percent of original size [2021-08-26 02:28:54,394 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 5 new quantified variables, introduced 11 case distinctions, treesize of input 449 treesize of output 312 [2021-08-26 02:28:54,416 INFO L354 Elim1Store]: treesize reduction 85, result has 18.3 percent of original size [2021-08-26 02:28:54,416 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 2 case distinctions, treesize of input 308 treesize of output 254 [2021-08-26 02:28:54,457 INFO L354 Elim1Store]: treesize reduction 136, result has 23.2 percent of original size [2021-08-26 02:28:54,458 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 229 treesize of output 235 [2021-08-26 02:28:54,834 INFO L354 Elim1Store]: treesize reduction 258, result has 12.2 percent of original size [2021-08-26 02:28:54,834 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 528 treesize of output 197 [2021-08-26 02:28:54,863 INFO L354 Elim1Store]: treesize reduction 272, result has 11.4 percent of original size [2021-08-26 02:28:54,863 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 429 treesize of output 415 [2021-08-26 02:28:54,941 INFO L354 Elim1Store]: treesize reduction 694, result has 9.9 percent of original size [2021-08-26 02:28:54,942 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 7 new quantified variables, introduced 15 case distinctions, treesize of input 409 treesize of output 330 [2021-08-26 02:28:58,227 INFO L354 Elim1Store]: treesize reduction 325, result has 21.3 percent of original size [2021-08-26 02:28:58,228 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 286 treesize of output 265 [2021-08-26 02:28:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:28:58,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81121137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:28:58,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:28:58,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-08-26 02:28:58,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965031609] [2021-08-26 02:28:58,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-26 02:28:58,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:28:58,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-26 02:28:58,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=610, Unknown=1, NotChecked=0, Total=702 [2021-08-26 02:28:58,337 INFO L87 Difference]: Start difference. First operand 233 states and 293 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 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 02:29:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:29:05,215 INFO L93 Difference]: Finished difference Result 421 states and 518 transitions. [2021-08-26 02:29:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-26 02:29:05,216 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 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 36 [2021-08-26 02:29:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:29:05,224 INFO L225 Difference]: With dead ends: 421 [2021-08-26 02:29:05,224 INFO L226 Difference]: Without dead ends: 365 [2021-08-26 02:29:05,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 8960.5ms TimeCoverageRelationStatistics Valid=250, Invalid=1819, Unknown=1, NotChecked=0, Total=2070 [2021-08-26 02:29:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-08-26 02:29:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 266. [2021-08-26 02:29:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.2835249042145593) internal successors, (335), 265 states have internal predecessors, (335), 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 02:29:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 335 transitions. [2021-08-26 02:29:05,270 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 335 transitions. Word has length 36 [2021-08-26 02:29:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:29:05,270 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 335 transitions. [2021-08-26 02:29:05,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 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 02:29:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 335 transitions. [2021-08-26 02:29:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 02:29:05,284 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:29:05,284 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:29:05,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-26 02:29:05,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:29:05,505 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:29:05,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:29:05,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1298209283, now seen corresponding path program 7 times [2021-08-26 02:29:05,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:29:05,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147635399] [2021-08-26 02:29:05,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:29:05,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:29:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:29:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:29:06,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:29:06,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147635399] [2021-08-26 02:29:06,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147635399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:29:06,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166331661] [2021-08-26 02:29:06,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 02:29:06,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:29:06,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:29:06,066 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:29:06,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-26 02:29:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:29:09,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 77 conjunts are in the unsatisfiable core [2021-08-26 02:29:09,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:29:09,050 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 02:29:09,100 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:29:09,101 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 02:29:09,114 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 27 treesize of output 15 [2021-08-26 02:29:09,123 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 27 treesize of output 15 [2021-08-26 02:29:09,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:09,239 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:29:09,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:09,253 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:29:09,360 INFO L354 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2021-08-26 02:29:09,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 149 treesize of output 94 [2021-08-26 02:29:09,392 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-08-26 02:29:09,392 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 4 case distinctions, treesize of input 113 treesize of output 83 [2021-08-26 02:29:09,426 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-08-26 02:29:09,426 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 77 treesize of output 92 [2021-08-26 02:29:09,652 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 02:29:09,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:09,682 INFO L354 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2021-08-26 02:29:09,682 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 99 treesize of output 80 [2021-08-26 02:29:09,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:09,702 INFO L354 Elim1Store]: treesize reduction 75, result has 12.8 percent of original size [2021-08-26 02:29:09,703 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 80 treesize of output 70 [2021-08-26 02:29:09,943 INFO L354 Elim1Store]: treesize reduction 140, result has 13.6 percent of original size [2021-08-26 02:29:09,943 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 6 new quantified variables, introduced 7 case distinctions, treesize of input 365 treesize of output 183 [2021-08-26 02:29:09,998 INFO L354 Elim1Store]: treesize reduction 248, result has 12.1 percent of original size [2021-08-26 02:29:09,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 297 treesize of output 209 [2021-08-26 02:29:10,036 INFO L354 Elim1Store]: treesize reduction 252, result has 16.3 percent of original size [2021-08-26 02:29:10,037 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 2 case distinctions, treesize of input 238 treesize of output 185 [2021-08-26 02:29:10,092 INFO L354 Elim1Store]: treesize reduction 138, result has 27.4 percent of original size [2021-08-26 02:29:10,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 159 treesize of output 189 [2021-08-26 02:29:10,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:10,363 INFO L354 Elim1Store]: treesize reduction 87, result has 7.4 percent of original size [2021-08-26 02:29:10,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 144 [2021-08-26 02:29:10,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:29:10,388 INFO L354 Elim1Store]: treesize reduction 147, result has 9.3 percent of original size [2021-08-26 02:29:10,388 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 6 case distinctions, treesize of input 195 treesize of output 175 [2021-08-26 02:29:10,405 INFO L354 Elim1Store]: treesize reduction 83, result has 23.1 percent of original size [2021-08-26 02:29:10,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 175 [2021-08-26 02:29:10,785 INFO L354 Elim1Store]: treesize reduction 198, result has 12.8 percent of original size [2021-08-26 02:29:10,786 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 8 new quantified variables, introduced 11 case distinctions, treesize of input 610 treesize of output 202 [2021-08-26 02:29:10,885 INFO L354 Elim1Store]: treesize reduction 318, result has 11.4 percent of original size [2021-08-26 02:29:10,885 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 6 new quantified variables, introduced 11 case distinctions, treesize of input 510 treesize of output 340 [2021-08-26 02:29:10,903 INFO L354 Elim1Store]: treesize reduction 193, result has 11.5 percent of original size [2021-08-26 02:29:10,904 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 2 case distinctions, treesize of input 410 treesize of output 341 [2021-08-26 02:29:10,921 INFO L354 Elim1Store]: treesize reduction 133, result has 15.8 percent of original size [2021-08-26 02:29:10,921 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 2 case distinctions, treesize of input 335 treesize of output 326 [2021-08-26 02:29:10,959 INFO L354 Elim1Store]: treesize reduction 160, result has 23.4 percent of original size [2021-08-26 02:29:10,960 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 320 treesize of output 326 [2021-08-26 02:29:11,319 INFO L354 Elim1Store]: treesize reduction 270, result has 11.8 percent of original size [2021-08-26 02:29:11,320 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 12 new quantified variables, introduced 15 case distinctions, treesize of input 787 treesize of output 219 [2021-08-26 02:29:11,410 INFO L354 Elim1Store]: treesize reduction 414, result has 10.4 percent of original size [2021-08-26 02:29:11,410 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 10 new quantified variables, introduced 15 case distinctions, treesize of input 648 treesize of output 394 [2021-08-26 02:29:11,440 INFO L354 Elim1Store]: treesize reduction 300, result has 15.0 percent of original size [2021-08-26 02:29:11,441 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 435 treesize of output 413 [2021-08-26 02:29:15,357 INFO L354 Elim1Store]: treesize reduction 153, result has 11.6 percent of original size [2021-08-26 02:29:15,358 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 11 new quantified variables, introduced 15 case distinctions, treesize of input 417 treesize of output 143 [2021-08-26 02:29:15,420 INFO L354 Elim1Store]: treesize reduction 150, result has 2.0 percent of original size [2021-08-26 02:29:15,420 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 8 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 92 [2021-08-26 02:29:15,523 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:29:15,523 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 45 treesize of output 25 [2021-08-26 02:29:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:29:15,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166331661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:29:15,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:29:15,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-08-26 02:29:15,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796325177] [2021-08-26 02:29:15,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-26 02:29:15,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:29:15,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-26 02:29:15,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-08-26 02:29:15,532 INFO L87 Difference]: Start difference. First operand 266 states and 335 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 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 02:30:19,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:30:19,795 INFO L93 Difference]: Finished difference Result 475 states and 599 transitions. [2021-08-26 02:30:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-26 02:30:19,795 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 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 36 [2021-08-26 02:30:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:30:19,797 INFO L225 Difference]: With dead ends: 475 [2021-08-26 02:30:19,797 INFO L226 Difference]: Without dead ends: 473 [2021-08-26 02:30:19,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 22636.2ms TimeCoverageRelationStatistics Valid=457, Invalid=4508, Unknown=5, NotChecked=0, Total=4970 [2021-08-26 02:30:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-08-26 02:30:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 306. [2021-08-26 02:30:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.2956810631229236) internal successors, (390), 305 states have internal predecessors, (390), 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 02:30:19,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 390 transitions. [2021-08-26 02:30:19,820 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 390 transitions. Word has length 36 [2021-08-26 02:30:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:30:19,821 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 390 transitions. [2021-08-26 02:30:19,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 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 02:30:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 390 transitions. [2021-08-26 02:30:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 02:30:19,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:30:19,822 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:30:19,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-26 02:30:20,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:30:20,043 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:30:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:30:20,044 INFO L82 PathProgramCache]: Analyzing trace with hash 280130149, now seen corresponding path program 1 times [2021-08-26 02:30:20,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:30:20,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362571058] [2021-08-26 02:30:20,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:30:20,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:30:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:30:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:20,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:30:20,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362571058] [2021-08-26 02:30:20,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362571058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:20,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116437525] [2021-08-26 02:30:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:30:20,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:30:20,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:30:20,331 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:30:20,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-26 02:30:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:30:23,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-26 02:30:23,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:30:23,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:23,794 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 20 treesize of output 9 [2021-08-26 02:30:23,813 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 02:30:23,832 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 02:30:23,920 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-26 02:30:23,920 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 139 treesize of output 110 [2021-08-26 02:30:23,940 INFO L354 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2021-08-26 02:30:23,940 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 104 treesize of output 79 [2021-08-26 02:30:23,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 70 [2021-08-26 02:30:23,946 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 67 treesize of output 55 [2021-08-26 02:30:24,299 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:30:24,299 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 66 treesize of output 50 [2021-08-26 02:30:24,304 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:30:24,304 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2021-08-26 02:30:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:30:24,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116437525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:24,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:30:24,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-08-26 02:30:24,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955408011] [2021-08-26 02:30:24,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 02:30:24,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:30:24,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 02:30:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-26 02:30:24,373 INFO L87 Difference]: Start difference. First operand 306 states and 390 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 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 02:30:25,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:30:25,462 INFO L93 Difference]: Finished difference Result 432 states and 527 transitions. [2021-08-26 02:30:25,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 02:30:25,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 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 36 [2021-08-26 02:30:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:30:25,463 INFO L225 Difference]: With dead ends: 432 [2021-08-26 02:30:25,463 INFO L226 Difference]: Without dead ends: 404 [2021-08-26 02:30:25,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 964.8ms TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 02:30:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-08-26 02:30:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 343. [2021-08-26 02:30:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 338 states have (on average 1.272189349112426) internal successors, (430), 342 states have internal predecessors, (430), 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 02:30:25,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 430 transitions. [2021-08-26 02:30:25,489 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 430 transitions. Word has length 36 [2021-08-26 02:30:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:30:25,490 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 430 transitions. [2021-08-26 02:30:25,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 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 02:30:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 430 transitions. [2021-08-26 02:30:25,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 02:30:25,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:30:25,491 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:30:25,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-26 02:30:25,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-26 02:30:25,713 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:30:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:30:25,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1254427063, now seen corresponding path program 1 times [2021-08-26 02:30:25,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:30:25,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506971679] [2021-08-26 02:30:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:30:25,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:30:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:30:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:25,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:30:25,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506971679] [2021-08-26 02:30:25,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506971679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:25,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524735825] [2021-08-26 02:30:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:30:25,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:30:25,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:30:25,987 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:30:25,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-26 02:30:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:30:29,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-26 02:30:29,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:30:29,369 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 02:30:29,420 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-26 02:30:29,421 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 02:30:29,430 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 27 treesize of output 15 [2021-08-26 02:30:29,439 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 27 treesize of output 15 [2021-08-26 02:30:29,551 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-26 02:30:29,551 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 34 treesize of output 21 [2021-08-26 02:30:29,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:30:29,566 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 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-26 02:30:29,683 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:30:29,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 160 treesize of output 97 [2021-08-26 02:30:29,724 INFO L354 Elim1Store]: treesize reduction 114, result has 14.3 percent of original size [2021-08-26 02:30:29,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 77 [2021-08-26 02:30:29,742 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-26 02:30:29,743 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 72 treesize of output 74 [2021-08-26 02:30:29,914 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:30:29,914 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 314 treesize of output 163 [2021-08-26 02:30:29,957 INFO L354 Elim1Store]: treesize reduction 162, result has 13.8 percent of original size [2021-08-26 02:30:29,957 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 235 treesize of output 152 [2021-08-26 02:30:29,960 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 156 treesize of output 140 [2021-08-26 02:30:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:30:30,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524735825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:30:30,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:30:30,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-26 02:30:30,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897839686] [2021-08-26 02:30:30,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 02:30:30,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:30:30,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 02:30:30,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-08-26 02:30:30,547 INFO L87 Difference]: Start difference. First operand 343 states and 430 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:30:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:30:32,232 INFO L93 Difference]: Finished difference Result 418 states and 510 transitions. [2021-08-26 02:30:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 02:30:32,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-26 02:30:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:30:32,234 INFO L225 Difference]: With dead ends: 418 [2021-08-26 02:30:32,234 INFO L226 Difference]: Without dead ends: 379 [2021-08-26 02:30:32,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1320.8ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-08-26 02:30:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-08-26 02:30:32,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 341. [2021-08-26 02:30:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 336 states have (on average 1.2708333333333333) internal successors, (427), 340 states have internal predecessors, (427), 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 02:30:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 427 transitions. [2021-08-26 02:30:32,260 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 427 transitions. Word has length 37 [2021-08-26 02:30:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:30:32,261 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 427 transitions. [2021-08-26 02:30:32,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:30:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 427 transitions. [2021-08-26 02:30:32,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 02:30:32,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:30:32,262 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:30:32,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-26 02:30:32,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-26 02:30:32,477 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 02:30:32,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:30:32,477 INFO L82 PathProgramCache]: Analyzing trace with hash 93608674, now seen corresponding path program 1 times [2021-08-26 02:30:32,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:30:32,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487044584] [2021-08-26 02:30:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:30:32,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:30:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 02:30:32,496 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 02:30:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 02:30:32,522 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 02:30:32,523 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 02:30:32,524 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:30:32,525 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:30:32,525 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:30:32,526 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:30:32,526 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:30:32,526 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:30:32,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-26 02:30:32,531 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 02:30:32,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:30:32 BoogieIcfgContainer [2021-08-26 02:30:32,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 02:30:32,556 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 02:30:32,556 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 02:30:32,556 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 02:30:32,557 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:24:56" (3/4) ... [2021-08-26 02:30:32,558 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 02:30:32,583 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 02:30:32,583 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 02:30:32,584 INFO L168 Benchmark]: Toolchain (without parser) took 336631.14 ms. Allocated memory was 60.8 MB in the beginning and 587.2 MB in the end (delta: 526.4 MB). Free memory was 39.1 MB in the beginning and 273.7 MB in the end (delta: -234.6 MB). Peak memory consumption was 292.2 MB. Max. memory is 16.1 GB. [2021-08-26 02:30:32,584 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 60.8 MB. Free memory was 42.6 MB in the beginning and 42.6 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:30:32,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.44 ms. Allocated memory is still 60.8 MB. Free memory was 38.8 MB in the beginning and 37.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-26 02:30:32,584 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.45 ms. Allocated memory is still 60.8 MB. Free memory was 37.1 MB in the beginning and 34.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:30:32,584 INFO L168 Benchmark]: Boogie Preprocessor took 20.01 ms. Allocated memory is still 60.8 MB. Free memory was 34.9 MB in the beginning and 33.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:30:32,584 INFO L168 Benchmark]: RCFGBuilder took 411.79 ms. Allocated memory was 60.8 MB in the beginning and 100.7 MB in the end (delta: 39.8 MB). Free memory was 33.0 MB in the beginning and 60.9 MB in the end (delta: -27.9 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2021-08-26 02:30:32,585 INFO L168 Benchmark]: TraceAbstraction took 335848.05 ms. Allocated memory was 100.7 MB in the beginning and 587.2 MB in the end (delta: 486.5 MB). Free memory was 60.5 MB in the beginning and 276.9 MB in the end (delta: -216.4 MB). Peak memory consumption was 269.8 MB. Max. memory is 16.1 GB. [2021-08-26 02:30:32,585 INFO L168 Benchmark]: Witness Printer took 27.13 ms. Allocated memory is still 587.2 MB. Free memory was 276.9 MB in the beginning and 273.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 02:30:32,585 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 60.8 MB. Free memory was 42.6 MB in the beginning and 42.6 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.44 ms. Allocated memory is still 60.8 MB. Free memory was 38.8 MB in the beginning and 37.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.45 ms. Allocated memory is still 60.8 MB. Free memory was 37.1 MB in the beginning and 34.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.01 ms. Allocated memory is still 60.8 MB. Free memory was 34.9 MB in the beginning and 33.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 411.79 ms. Allocated memory was 60.8 MB in the beginning and 100.7 MB in the end (delta: 39.8 MB). Free memory was 33.0 MB in the beginning and 60.9 MB in the end (delta: -27.9 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 335848.05 ms. Allocated memory was 100.7 MB in the beginning and 587.2 MB in the end (delta: 486.5 MB). Free memory was 60.5 MB in the beginning and 276.9 MB in the end (delta: -216.4 MB). Peak memory consumption was 269.8 MB. Max. memory is 16.1 GB. * Witness Printer took 27.13 ms. Allocated memory is still 587.2 MB. Free memory was 276.9 MB in the beginning and 273.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1062]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L996] SLL* head = malloc(sizeof(SLL)); [L997] head->next = ((void*)0) [L998] head->data = 0 [L1000] SLL* x = head; [L1001] int marked = 0; [L1004] COND TRUE __VERIFIER_nondet_int() || !marked [L1007] x->next = malloc(sizeof(SLL)) [L1008] EXPR x->next [L1008] x = x->next [L1009] x->next = ((void*)0) [L1011] COND TRUE __VERIFIER_nondet_int() [L1013] marked = 1 [L1016] COND TRUE \read(marked) [L1017] x->data = 1 [L1004] COND FALSE !(__VERIFIER_nondet_int() || !marked) [L1022] x = head [L1024] COND FALSE !(!(((void*)0) != x)) [L1025] marked = 0 [L1027] EXPR x->next [L1027] x->next != ((void*)0) && x->next->data == 0 [L1027] EXPR x->next [L1027] EXPR x->next->data [L1027] x->next != ((void*)0) && x->next->data == 0 [L1027] COND FALSE !(x->next != ((void*)0) && x->next->data == 0) [L1032] EXPR x->next [L1032] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1032] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1032] COND FALSE !(x->next != ((void*)0) && __VERIFIER_nondet_int()) [L1038] SLL* tmp = malloc(sizeof(SLL)); [L1039] tmp->data = 1 [L1040] tmp->next = ((void*)0) [L1041] EXPR x->next [L1041] COND FALSE !(x->next == ((void*)0)) [L1045] EXPR x->next [L1045] tmp->next = x->next [L1046] x->next = tmp [L1049] marked = 0 [L1050] x = head [L1052] x != ((void*)0) && x->data != 1 [L1052] EXPR x->data [L1052] x != ((void*)0) && x->data != 1 [L1052] COND TRUE x != ((void*)0) && x->data != 1 [L1054] EXPR x->data [L1054] marked = x->data [L1055] EXPR x->data [L1055] COND FALSE !(!(x->data == 0)) [L1056] COND FALSE !(!(marked == 0)) [L1057] EXPR x->next [L1057] x = x->next [L1052] x != ((void*)0) && x->data != 1 [L1052] EXPR x->data [L1052] x != ((void*)0) && x->data != 1 [L1052] COND FALSE !(x != ((void*)0) && x->data != 1) [L1059] COND TRUE x != ((void*)0) [L1061] EXPR x->data [L1061] marked = x->data [L1062] EXPR x->data [L1062] COND TRUE !(x->data != 1) [L1062] reach_error() - UnprovableResult [Line: 1024]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1055]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1056]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 56 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 335782.4ms, OverallIterations: 33, TraceHistogramMax: 5, EmptinessCheckTime: 40.9ms, AutomataDifference: 232990.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2038 SDtfs, 6522 SDslu, 17428 SDs, 0 SdLazy, 16824 SolverSat, 2004 SolverUnsat, 66 SolverUnknown, 0 SolverNotchecked, 146120.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1496 GetRequests, 644 SyntacticMatches, 15 SemanticMatches, 837 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6867 ImplicationChecksByTransitivity, 99663.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=343occurred in iteration=31, InterpolantAutomatonStates: 602, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 422.8ms AutomataMinimizationTime, 32 MinimizatonAttempts, 2391 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 511.7ms SsaConstructionTime, 1273.5ms SatisfiabilityAnalysisTime, 56143.4ms InterpolantComputationTime, 1686 NumberOfCodeBlocks, 1686 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 1593 ConstructedInterpolants, 192 QuantifiedInterpolants, 77644 SizeOfPredicates, 324 NumberOfNonLiveVariables, 3934 ConjunctsInSsa, 1154 ConjunctsInUnsatCore, 56 InterpolantComputations, 6 PerfectInterpolantSequences, 54/649 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 02:30:32,791 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-26 02:30:32,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...