./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/sll-buckets-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/forester-heap/sll-buckets-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 57fc1af3da22ce54c30e1aa642eaa8a52bbdae67 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 09:12:44,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 09:12:44,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 09:12:44,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 09:12:44,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 09:12:44,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 09:12:44,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 09:12:44,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 09:12:44,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 09:12:44,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 09:12:44,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 09:12:44,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 09:12:44,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 09:12:44,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 09:12:44,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 09:12:44,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 09:12:44,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 09:12:44,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 09:12:44,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 09:12:44,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 09:12:44,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 09:12:44,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 09:12:44,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 09:12:44,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 09:12:44,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 09:12:44,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 09:12:44,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 09:12:44,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 09:12:44,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 09:12:44,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 09:12:44,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 09:12:44,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 09:12:44,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 09:12:44,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 09:12:44,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 09:12:44,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 09:12:44,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 09:12:44,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 09:12:44,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 09:12:44,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 09:12:44,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 09:12:44,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 09:12:44,825 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 09:12:44,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 09:12:44,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 09:12:44,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 09:12:44,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 09:12:44,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 09:12:44,828 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 09:12:44,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 09:12:44,828 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 09:12:44,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 09:12:44,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 09:12:44,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 09:12:44,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 09:12:44,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 09:12:44,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 09:12:44,829 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 09:12:44,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 09:12:44,830 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 09:12:44,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 09:12:44,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 09:12:44,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 09:12:44,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 09:12:44,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:12:44,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 09:12:44,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 09:12:44,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 09:12:44,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 09:12:44,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 09:12:44,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 09:12:44,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 09:12:44,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57fc1af3da22ce54c30e1aa642eaa8a52bbdae67 [2021-08-29 09:12:45,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 09:12:45,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 09:12:45,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 09:12:45,088 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 09:12:45,088 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 09:12:45,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-08-29 09:12:45,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e136fc92e/b18559c9410644d4853944179511c052/FLAGdf22da0b1 [2021-08-29 09:12:45,529 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 09:12:45,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-08-29 09:12:45,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e136fc92e/b18559c9410644d4853944179511c052/FLAGdf22da0b1 [2021-08-29 09:12:45,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e136fc92e/b18559c9410644d4853944179511c052 [2021-08-29 09:12:45,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 09:12:45,931 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 09:12:45,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 09:12:45,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 09:12:45,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 09:12:45,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:12:45" (1/1) ... [2021-08-29 09:12:45,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55373c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:12:45, skipping insertion in model container [2021-08-29 09:12:45,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:12:45" (1/1) ... [2021-08-29 09:12:45,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 09:12:45,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 09:12:46,133 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-08-29 09:12:46,144 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-08-29 09:12:46,147 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-08-29 09:12:46,164 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-08-29 09:12:46,167 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-08-29 09:12:46,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:12:46,177 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 09:12:46,223 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-08-29 09:12:46,223 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-08-29 09:12:46,229 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-08-29 09:12:46,231 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-08-29 09:12:46,236 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-08-29 09:12:46,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:12:46,258 INFO L208 MainTranslator]: Completed translation [2021-08-29 09:12:46,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:12:46 WrapperNode [2021-08-29 09:12:46,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 09:12:46,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 09:12:46,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 09:12:46,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 09:12:46,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:12:46" (1/1) ... [2021-08-29 09:12:46,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:12:46" (1/1) ... [2021-08-29 09:12:46,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 09:12:46,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 09:12:46,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 09:12:46,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 09:12:46,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:12:46" (1/1) ... [2021-08-29 09:12:46,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:12:46" (1/1) ... [2021-08-29 09:12:46,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:12:46" (1/1) ... [2021-08-29 09:12:46,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:12:46" (1/1) ... [2021-08-29 09:12:46,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:12:46" (1/1) ... [2021-08-29 09:12:46,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:12:46" (1/1) ... [2021-08-29 09:12:46,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:12:46" (1/1) ... [2021-08-29 09:12:46,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 09:12:46,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 09:12:46,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 09:12:46,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 09:12:46,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:12:46" (1/1) ... [2021-08-29 09:12:46,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:12:46,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:12:46,386 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) [2021-08-29 09:12:46,392 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 [2021-08-29 09:12:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 09:12:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 09:12:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-29 09:12:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-29 09:12:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 09:12:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-29 09:12:46,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 09:12:46,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 09:12:46,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 09:12:46,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 09:12:46,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 09:12:46,582 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-08-29 09:12:46,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:12:46 BoogieIcfgContainer [2021-08-29 09:12:46,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 09:12:46,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 09:12:46,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 09:12:46,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 09:12:46,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:12:45" (1/3) ... [2021-08-29 09:12:46,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66793f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:12:46, skipping insertion in model container [2021-08-29 09:12:46,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:12:46" (2/3) ... [2021-08-29 09:12:46,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66793f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:12:46, skipping insertion in model container [2021-08-29 09:12:46,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:12:46" (3/3) ... [2021-08-29 09:12:46,589 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-buckets-2.i [2021-08-29 09:12:46,592 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 09:12:46,592 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-08-29 09:12:46,620 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 09:12:46,624 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 [2021-08-29 09:12:46,624 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-29 09:12:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 38 states have (on average 1.868421052631579) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:46,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-29 09:12:46,636 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:12:46,637 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:12:46,637 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:12:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:12:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash 179510098, now seen corresponding path program 1 times [2021-08-29 09:12:46,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:12:46,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357758894] [2021-08-29 09:12:46,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:46,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:12:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:46,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:12:46,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357758894] [2021-08-29 09:12:46,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357758894] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:12:46,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:12:46,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 09:12:46,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49620818] [2021-08-29 09:12:46,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 09:12:46,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:12:46,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 09:12:46,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 09:12:46,862 INFO L87 Difference]: Start difference. First operand has 44 states, 38 states have (on average 1.868421052631579) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:12:47,027 INFO L93 Difference]: Finished difference Result 112 states and 188 transitions. [2021-08-29 09:12:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 09:12:47,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-29 09:12:47,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:12:47,034 INFO L225 Difference]: With dead ends: 112 [2021-08-29 09:12:47,034 INFO L226 Difference]: Without dead ends: 66 [2021-08-29 09:12:47,036 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.72ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 09:12:47,038 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.85ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.05ms IncrementalHoareTripleChecker+Time [2021-08-29 09:12:47,039 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 116 Unknown, 0 Unchecked, 1.85ms Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 136.05ms Time] [2021-08-29 09:12:47,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-29 09:12:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2021-08-29 09:12:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-08-29 09:12:47,060 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 8 [2021-08-29 09:12:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:12:47,061 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-08-29 09:12:47,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:47,061 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-08-29 09:12:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 09:12:47,061 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:12:47,062 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:12:47,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 09:12:47,062 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:12:47,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:12:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1306111283, now seen corresponding path program 1 times [2021-08-29 09:12:47,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:12:47,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700697323] [2021-08-29 09:12:47,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:47,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:12:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:47,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:12:47,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700697323] [2021-08-29 09:12:47,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700697323] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:12:47,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:12:47,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 09:12:47,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260004106] [2021-08-29 09:12:47,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 09:12:47,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:12:47,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 09:12:47,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 09:12:47,105 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:47,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:12:47,193 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-08-29 09:12:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 09:12:47,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-29 09:12:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:12:47,196 INFO L225 Difference]: With dead ends: 45 [2021-08-29 09:12:47,196 INFO L226 Difference]: Without dead ends: 43 [2021-08-29 09:12:47,196 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.24ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 09:12:47,198 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.50ms IncrementalHoareTripleChecker+Time [2021-08-29 09:12:47,198 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 81 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 77.50ms Time] [2021-08-29 09:12:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-29 09:12:47,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2021-08-29 09:12:47,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-08-29 09:12:47,208 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 9 [2021-08-29 09:12:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:12:47,208 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-08-29 09:12:47,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:47,211 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-08-29 09:12:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 09:12:47,212 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:12:47,212 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:12:47,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 09:12:47,213 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:12:47,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:12:47,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1834780084, now seen corresponding path program 1 times [2021-08-29 09:12:47,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:12:47,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631171284] [2021-08-29 09:12:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:47,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:12:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:47,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:12:47,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631171284] [2021-08-29 09:12:47,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631171284] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:12:47,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:12:47,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 09:12:47,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992528942] [2021-08-29 09:12:47,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 09:12:47,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:12:47,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 09:12:47,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 09:12:47,361 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:47,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:12:47,537 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-08-29 09:12:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 09:12:47,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-29 09:12:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:12:47,539 INFO L225 Difference]: With dead ends: 60 [2021-08-29 09:12:47,539 INFO L226 Difference]: Without dead ends: 49 [2021-08-29 09:12:47,540 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.91ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-29 09:12:47,540 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.00ms IncrementalHoareTripleChecker+Time [2021-08-29 09:12:47,541 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 177 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [8 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 145.00ms Time] [2021-08-29 09:12:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-29 09:12:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-08-29 09:12:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-08-29 09:12:47,545 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 10 [2021-08-29 09:12:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:12:47,546 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-08-29 09:12:47,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-08-29 09:12:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 09:12:47,546 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:12:47,546 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:12:47,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 09:12:47,547 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:12:47,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:12:47,547 INFO L82 PathProgramCache]: Analyzing trace with hash 710639734, now seen corresponding path program 1 times [2021-08-29 09:12:47,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:12:47,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721203469] [2021-08-29 09:12:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:47,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:12:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:47,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:12:47,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721203469] [2021-08-29 09:12:47,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721203469] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:12:47,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:12:47,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 09:12:47,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822727494] [2021-08-29 09:12:47,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 09:12:47,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:12:47,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 09:12:47,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 09:12:47,583 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:47,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:12:47,690 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-08-29 09:12:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 09:12:47,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-29 09:12:47,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:12:47,691 INFO L225 Difference]: With dead ends: 45 [2021-08-29 09:12:47,691 INFO L226 Difference]: Without dead ends: 43 [2021-08-29 09:12:47,692 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.48ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 09:12:47,692 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.86ms IncrementalHoareTripleChecker+Time [2021-08-29 09:12:47,693 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.44ms Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 101.86ms Time] [2021-08-29 09:12:47,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-29 09:12:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-08-29 09:12:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-08-29 09:12:47,696 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 10 [2021-08-29 09:12:47,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:12:47,696 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-08-29 09:12:47,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-08-29 09:12:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 09:12:47,697 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:12:47,697 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:12:47,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-29 09:12:47,697 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:12:47,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:12:47,698 INFO L82 PathProgramCache]: Analyzing trace with hash 625501225, now seen corresponding path program 1 times [2021-08-29 09:12:47,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:12:47,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378350542] [2021-08-29 09:12:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:47,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:12:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:47,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:12:47,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378350542] [2021-08-29 09:12:47,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378350542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:12:47,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598408795] [2021-08-29 09:12:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:47,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:12:47,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:12:47,849 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) [2021-08-29 09:12:47,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 09:12:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:47,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-29 09:12:47,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:12:47,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:47,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:47,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 191 [2021-08-29 09:12:48,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:48,168 INFO L354 Elim1Store]: treesize reduction 194, result has 13.8 percent of original size [2021-08-29 09:12:48,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 236 treesize of output 170 [2021-08-29 09:12:48,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:48,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:48,387 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-08-29 09:12:48,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 254 treesize of output 176 [2021-08-29 09:12:48,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:48,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:48,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:48,581 INFO L354 Elim1Store]: treesize reduction 1283, result has 6.1 percent of original size [2021-08-29 09:12:48,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 221 treesize of output 186 [2021-08-29 09:12:48,598 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-29 09:12:48,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 165 [2021-08-29 09:12:48,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:48,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:48,910 INFO L354 Elim1Store]: treesize reduction 212, result has 10.2 percent of original size [2021-08-29 09:12:48,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 177 treesize of output 132 [2021-08-29 09:12:48,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:48,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:48,943 INFO L354 Elim1Store]: treesize reduction 360, result has 10.9 percent of original size [2021-08-29 09:12:48,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 164 treesize of output 169 [2021-08-29 09:12:49,214 INFO L354 Elim1Store]: treesize reduction 225, result has 3.4 percent of original size [2021-08-29 09:12:49,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 181 treesize of output 94 [2021-08-29 09:12:49,258 INFO L354 Elim1Store]: treesize reduction 194, result has 1.5 percent of original size [2021-08-29 09:12:49,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 45 [2021-08-29 09:12:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:49,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:12:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:49,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598408795] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:12:49,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:12:49,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2021-08-29 09:12:49,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959055305] [2021-08-29 09:12:49,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-29 09:12:49,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:12:49,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-29 09:12:49,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-29 09:12:49,419 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:12:49,668 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-08-29 09:12:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 09:12:49,668 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-29 09:12:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:12:49,668 INFO L225 Difference]: With dead ends: 58 [2021-08-29 09:12:49,668 INFO L226 Difference]: Without dead ends: 47 [2021-08-29 09:12:49,669 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 230.65ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-29 09:12:49,669 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 185.37ms IncrementalHoareTripleChecker+Time [2021-08-29 09:12:49,670 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 266 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [4 Valid, 220 Invalid, 0 Unknown, 42 Unchecked, 185.37ms Time] [2021-08-29 09:12:49,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-29 09:12:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-08-29 09:12:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-08-29 09:12:49,675 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2021-08-29 09:12:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:12:49,675 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-08-29 09:12:49,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-08-29 09:12:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 09:12:49,675 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:12:49,675 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:12:49,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 09:12:49,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:12:49,891 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:12:49,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:12:49,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1157082046, now seen corresponding path program 1 times [2021-08-29 09:12:49,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:12:49,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128464161] [2021-08-29 09:12:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:49,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:12:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:49,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:12:49,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128464161] [2021-08-29 09:12:49,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128464161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:12:49,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265081860] [2021-08-29 09:12:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:49,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:12:49,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:12:49,945 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) [2021-08-29 09:12:49,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 09:12:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:50,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 09:12:50,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:12:50,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:50,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:50,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:50,090 INFO L354 Elim1Store]: treesize reduction 228, result has 14.3 percent of original size [2021-08-29 09:12:50,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 151 treesize of output 89 [2021-08-29 09:12:50,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:50,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:50,150 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-08-29 09:12:50,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 120 treesize of output 94 [2021-08-29 09:12:50,171 INFO L354 Elim1Store]: treesize reduction 124, result has 10.8 percent of original size [2021-08-29 09:12:50,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 143 treesize of output 130 [2021-08-29 09:12:50,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:50,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:50,327 INFO L354 Elim1Store]: treesize reduction 290, result has 13.9 percent of original size [2021-08-29 09:12:50,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 104 [2021-08-29 09:12:50,347 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-29 09:12:50,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 132 [2021-08-29 09:12:50,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:50,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:50,499 INFO L354 Elim1Store]: treesize reduction 452, result has 10.7 percent of original size [2021-08-29 09:12:50,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 99 [2021-08-29 09:12:50,863 INFO L354 Elim1Store]: treesize reduction 201, result has 2.0 percent of original size [2021-08-29 09:12:50,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 53 [2021-08-29 09:12:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:50,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:12:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:50,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265081860] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:12:50,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:12:50,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-08-29 09:12:50,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924227142] [2021-08-29 09:12:50,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 09:12:50,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:12:50,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 09:12:50,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-29 09:12:50,970 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:12:51,092 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2021-08-29 09:12:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 09:12:51,093 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-29 09:12:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:12:51,094 INFO L225 Difference]: With dead ends: 67 [2021-08-29 09:12:51,094 INFO L226 Difference]: Without dead ends: 65 [2021-08-29 09:12:51,094 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 174.05ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-29 09:12:51,094 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.58ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 75.90ms IncrementalHoareTripleChecker+Time [2021-08-29 09:12:51,095 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 225 Unknown, 0 Unchecked, 0.58ms Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 123 Unchecked, 75.90ms Time] [2021-08-29 09:12:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-29 09:12:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2021-08-29 09:12:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 54 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) [2021-08-29 09:12:51,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2021-08-29 09:12:51,099 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 16 [2021-08-29 09:12:51,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:12:51,099 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2021-08-29 09:12:51,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:51,099 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2021-08-29 09:12:51,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 09:12:51,099 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:12:51,099 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:12:51,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 09:12:51,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-29 09:12:51,309 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:12:51,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:12:51,309 INFO L82 PathProgramCache]: Analyzing trace with hash -340167970, now seen corresponding path program 1 times [2021-08-29 09:12:51,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:12:51,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075491899] [2021-08-29 09:12:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:51,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:12:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:51,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:12:51,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075491899] [2021-08-29 09:12:51,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075491899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:12:51,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816227688] [2021-08-29 09:12:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:51,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:12:51,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:12:51,373 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) [2021-08-29 09:12:51,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 09:12:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:51,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 09:12:51,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:12:51,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:51,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:51,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 109 [2021-08-29 09:12:51,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:51,466 INFO L354 Elim1Store]: treesize reduction 194, result has 13.8 percent of original size [2021-08-29 09:12:51,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 134 treesize of output 88 [2021-08-29 09:12:51,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:51,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:51,528 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-08-29 09:12:51,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 120 treesize of output 94 [2021-08-29 09:12:51,545 INFO L354 Elim1Store]: treesize reduction 124, result has 10.8 percent of original size [2021-08-29 09:12:51,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 143 treesize of output 130 [2021-08-29 09:12:51,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:51,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:51,688 INFO L354 Elim1Store]: treesize reduction 290, result has 13.9 percent of original size [2021-08-29 09:12:51,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 104 [2021-08-29 09:12:51,705 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-29 09:12:51,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 132 [2021-08-29 09:12:51,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:51,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:51,871 INFO L354 Elim1Store]: treesize reduction 452, result has 10.7 percent of original size [2021-08-29 09:12:51,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 99 [2021-08-29 09:12:52,192 INFO L354 Elim1Store]: treesize reduction 201, result has 2.0 percent of original size [2021-08-29 09:12:52,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 53 [2021-08-29 09:12:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:52,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:12:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:52,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816227688] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:12:52,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:12:52,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-08-29 09:12:52,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809290551] [2021-08-29 09:12:52,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 09:12:52,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:12:52,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 09:12:52,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-29 09:12:52,290 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:52,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:12:52,419 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2021-08-29 09:12:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 09:12:52,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-29 09:12:52,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:12:52,420 INFO L225 Difference]: With dead ends: 75 [2021-08-29 09:12:52,420 INFO L226 Difference]: Without dead ends: 73 [2021-08-29 09:12:52,420 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 166.29ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-29 09:12:52,421 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.61ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 84.20ms IncrementalHoareTripleChecker+Time [2021-08-29 09:12:52,421 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 235 Unknown, 0 Unchecked, 0.61ms Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 108 Unchecked, 84.20ms Time] [2021-08-29 09:12:52,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-29 09:12:52,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2021-08-29 09:12:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 55 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2021-08-29 09:12:52,425 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 17 [2021-08-29 09:12:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:12:52,425 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2021-08-29 09:12:52,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:52,425 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2021-08-29 09:12:52,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 09:12:52,425 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:12:52,426 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:12:52,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 09:12:52,636 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 [2021-08-29 09:12:52,637 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:12:52,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:12:52,637 INFO L82 PathProgramCache]: Analyzing trace with hash -82002532, now seen corresponding path program 1 times [2021-08-29 09:12:52,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:12:52,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730407025] [2021-08-29 09:12:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:52,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:12:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:52,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:12:52,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730407025] [2021-08-29 09:12:52,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730407025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:12:52,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602432867] [2021-08-29 09:12:52,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:52,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:12:52,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:12:52,689 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) [2021-08-29 09:12:52,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 09:12:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:52,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 09:12:52,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:12:52,790 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-08-29 09:12:52,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 137 treesize of output 136 [2021-08-29 09:12:52,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:52,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:52,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:52,837 INFO L354 Elim1Store]: treesize reduction 228, result has 14.3 percent of original size [2021-08-29 09:12:52,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 147 treesize of output 85 [2021-08-29 09:12:52,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:52,885 INFO L354 Elim1Store]: treesize reduction 284, result has 12.3 percent of original size [2021-08-29 09:12:52,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 124 treesize of output 90 [2021-08-29 09:12:52,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:52,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:53,013 INFO L354 Elim1Store]: treesize reduction 290, result has 13.9 percent of original size [2021-08-29 09:12:53,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 104 [2021-08-29 09:12:53,033 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-29 09:12:53,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 132 [2021-08-29 09:12:53,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:53,179 INFO L354 Elim1Store]: treesize reduction 452, result has 10.7 percent of original size [2021-08-29 09:12:53,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 139 treesize of output 99 [2021-08-29 09:12:53,467 INFO L354 Elim1Store]: treesize reduction 201, result has 2.0 percent of original size [2021-08-29 09:12:53,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 125 treesize of output 53 [2021-08-29 09:12:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:53,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:12:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:53,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602432867] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:12:53,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:12:53,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-08-29 09:12:53,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846453350] [2021-08-29 09:12:53,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 09:12:53,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:12:53,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 09:12:53,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-29 09:12:53,555 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:53,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:12:53,701 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2021-08-29 09:12:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 09:12:53,701 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-29 09:12:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:12:53,702 INFO L225 Difference]: With dead ends: 75 [2021-08-29 09:12:53,702 INFO L226 Difference]: Without dead ends: 73 [2021-08-29 09:12:53,702 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 154.66ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-29 09:12:53,703 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 103.84ms IncrementalHoareTripleChecker+Time [2021-08-29 09:12:53,703 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 371 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [3 Valid, 216 Invalid, 0 Unknown, 152 Unchecked, 103.84ms Time] [2021-08-29 09:12:53,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-29 09:12:53,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2021-08-29 09:12:53,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 55 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2021-08-29 09:12:53,707 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 17 [2021-08-29 09:12:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:12:53,707 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2021-08-29 09:12:53,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:53,707 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2021-08-29 09:12:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 09:12:53,708 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:12:53,708 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:12:53,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 09:12:53,916 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 [2021-08-29 09:12:53,917 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:12:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:12:53,917 INFO L82 PathProgramCache]: Analyzing trace with hash 442135079, now seen corresponding path program 2 times [2021-08-29 09:12:53,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:12:53,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258664749] [2021-08-29 09:12:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:53,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:12:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:54,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:12:54,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258664749] [2021-08-29 09:12:54,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258664749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:12:54,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192073751] [2021-08-29 09:12:54,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 09:12:54,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:12:54,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:12:54,012 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) [2021-08-29 09:12:54,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 09:12:54,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 09:12:54,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:12:54,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-29 09:12:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:12:54,227 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-08-29 09:12:54,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 146 treesize of output 145 [2021-08-29 09:12:54,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:54,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:54,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:54,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:54,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:54,263 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-08-29 09:12:54,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 136 treesize of output 114 [2021-08-29 09:12:54,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:54,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:54,325 INFO L354 Elim1Store]: treesize reduction 429, result has 8.9 percent of original size [2021-08-29 09:12:54,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 75 [2021-08-29 09:12:54,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:54,443 INFO L354 Elim1Store]: treesize reduction 134, result has 16.3 percent of original size [2021-08-29 09:12:54,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 63 [2021-08-29 09:12:54,457 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-08-29 09:12:54,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 58 [2021-08-29 09:12:54,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:54,529 INFO L354 Elim1Store]: treesize reduction 100, result has 14.5 percent of original size [2021-08-29 09:12:54,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 60 [2021-08-29 09:12:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 09:12:54,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 09:12:54,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192073751] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:12:54,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 09:12:54,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-08-29 09:12:54,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994586773] [2021-08-29 09:12:54,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 09:12:54,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:12:54,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 09:12:54,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-29 09:12:54,918 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:54,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:12:54,959 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2021-08-29 09:12:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 09:12:54,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-29 09:12:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:12:54,960 INFO L225 Difference]: With dead ends: 98 [2021-08-29 09:12:54,960 INFO L226 Difference]: Without dead ends: 63 [2021-08-29 09:12:54,960 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 112.00ms TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-29 09:12:54,960 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.21ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 37.50ms IncrementalHoareTripleChecker+Time [2021-08-29 09:12:54,961 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 156 Unknown, 0 Unchecked, 0.21ms Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 127 Unchecked, 37.50ms Time] [2021-08-29 09:12:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-29 09:12:54,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-29 09:12:54,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-08-29 09:12:54,964 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 18 [2021-08-29 09:12:54,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:12:54,964 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-08-29 09:12:54,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-08-29 09:12:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 09:12:54,965 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:12:54,965 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:12:54,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 09:12:55,176 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 [2021-08-29 09:12:55,177 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:12:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:12:55,177 INFO L82 PathProgramCache]: Analyzing trace with hash -482453053, now seen corresponding path program 2 times [2021-08-29 09:12:55,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:12:55,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69874414] [2021-08-29 09:12:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:55,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:12:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:55,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:12:55,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69874414] [2021-08-29 09:12:55,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69874414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:12:55,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271044473] [2021-08-29 09:12:55,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 09:12:55,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:12:55,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:12:55,265 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) [2021-08-29 09:12:55,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 09:12:55,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 09:12:55,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:12:55,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-29 09:12:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:12:55,516 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-08-29 09:12:55,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 223 treesize of output 222 [2021-08-29 09:12:55,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:55,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:55,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 191 [2021-08-29 09:12:55,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:55,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:55,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 166 [2021-08-29 09:12:55,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:55,557 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-08-29 09:12:55,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 149 [2021-08-29 09:12:55,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:55,587 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-08-29 09:12:55,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 249 treesize of output 155 [2021-08-29 09:12:55,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:55,618 INFO L354 Elim1Store]: treesize reduction 224, result has 14.8 percent of original size [2021-08-29 09:12:55,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 213 treesize of output 215 [2021-08-29 09:12:55,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:55,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:55,777 INFO L354 Elim1Store]: treesize reduction 198, result has 18.5 percent of original size [2021-08-29 09:12:55,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 197 treesize of output 153 [2021-08-29 09:12:55,793 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-29 09:12:55,794 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 193 treesize of output 197 [2021-08-29 09:12:55,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:55,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:55,838 INFO L354 Elim1Store]: treesize reduction 318, result has 17.8 percent of original size [2021-08-29 09:12:55,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 185 treesize of output 199 [2021-08-29 09:12:55,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:55,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:56,022 INFO L354 Elim1Store]: treesize reduction 258, result has 12.2 percent of original size [2021-08-29 09:12:56,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 215 treesize of output 159 [2021-08-29 09:12:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:56,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:56,095 INFO L354 Elim1Store]: treesize reduction 402, result has 13.0 percent of original size [2021-08-29 09:12:56,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 196 treesize of output 198 [2021-08-29 09:12:56,513 INFO L354 Elim1Store]: treesize reduction 192, result has 0.5 percent of original size [2021-08-29 09:12:56,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 184 treesize of output 128 [2021-08-29 09:12:56,646 INFO L354 Elim1Store]: treesize reduction 112, result has 7.4 percent of original size [2021-08-29 09:12:56,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 133 treesize of output 67 [2021-08-29 09:12:56,683 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-29 09:12:56,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 45 treesize of output 23 [2021-08-29 09:12:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:56,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:12:56,786 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-08-29 09:12:56,786 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 30 treesize of output 24 [2021-08-29 09:12:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:59,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271044473] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:12:59,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:12:59,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 23 [2021-08-29 09:12:59,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593395322] [2021-08-29 09:12:59,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-29 09:12:59,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:12:59,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-29 09:12:59,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=429, Unknown=1, NotChecked=0, Total=506 [2021-08-29 09:12:59,025 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-08-29 09:12:59,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:12:59,389 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2021-08-29 09:12:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 09:12:59,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 19 [2021-08-29 09:12:59,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:12:59,390 INFO L225 Difference]: With dead ends: 87 [2021-08-29 09:12:59,390 INFO L226 Difference]: Without dead ends: 85 [2021-08-29 09:12:59,391 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1474.49ms TimeCoverageRelationStatistics Valid=93, Invalid=506, Unknown=1, NotChecked=0, Total=600 [2021-08-29 09:12:59,391 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 188.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.14ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 211.77ms IncrementalHoareTripleChecker+Time [2021-08-29 09:12:59,391 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 497 Unknown, 0 Unchecked, 1.14ms Time], IncrementalHoareTripleChecker [4 Valid, 207 Invalid, 0 Unknown, 286 Unchecked, 211.77ms Time] [2021-08-29 09:12:59,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-29 09:12:59,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2021-08-29 09:12:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:12:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2021-08-29 09:12:59,395 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 19 [2021-08-29 09:12:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:12:59,395 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2021-08-29 09:12:59,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-08-29 09:12:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2021-08-29 09:12:59,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 09:12:59,396 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:12:59,396 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:12:59,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 09:12:59,608 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 [2021-08-29 09:12:59,609 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:12:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:12:59,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1493570303, now seen corresponding path program 2 times [2021-08-29 09:12:59,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:12:59,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893192056] [2021-08-29 09:12:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:12:59,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:12:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:12:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:12:59,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:12:59,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893192056] [2021-08-29 09:12:59,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893192056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:12:59,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76576207] [2021-08-29 09:12:59,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 09:12:59,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:12:59,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:12:59,710 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) [2021-08-29 09:12:59,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 09:12:59,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 09:12:59,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:12:59,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-29 09:12:59,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:12:59,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:59,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:59,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 195 [2021-08-29 09:12:59,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:59,933 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-08-29 09:12:59,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 244 treesize of output 178 [2021-08-29 09:12:59,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:12:59,986 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-08-29 09:12:59,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 282 treesize of output 184 [2021-08-29 09:12:59,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:59,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:12:59,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 245 [2021-08-29 09:13:00,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:00,027 INFO L354 Elim1Store]: treesize reduction 224, result has 14.8 percent of original size [2021-08-29 09:13:00,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 209 treesize of output 211 [2021-08-29 09:13:00,042 INFO L354 Elim1Store]: treesize reduction 124, result has 10.8 percent of original size [2021-08-29 09:13:00,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 213 treesize of output 200 [2021-08-29 09:13:00,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:00,204 INFO L354 Elim1Store]: treesize reduction 318, result has 17.8 percent of original size [2021-08-29 09:13:00,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 197 treesize of output 211 [2021-08-29 09:13:00,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:00,250 INFO L354 Elim1Store]: treesize reduction 198, result has 18.5 percent of original size [2021-08-29 09:13:00,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 193 treesize of output 149 [2021-08-29 09:13:00,265 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-29 09:13:00,265 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 189 treesize of output 193 [2021-08-29 09:13:00,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:00,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:00,444 INFO L354 Elim1Store]: treesize reduction 258, result has 12.2 percent of original size [2021-08-29 09:13:00,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 215 treesize of output 159 [2021-08-29 09:13:00,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:00,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:00,489 INFO L354 Elim1Store]: treesize reduction 402, result has 13.0 percent of original size [2021-08-29 09:13:00,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 196 treesize of output 198 [2021-08-29 09:13:00,858 INFO L354 Elim1Store]: treesize reduction 192, result has 0.5 percent of original size [2021-08-29 09:13:00,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 184 treesize of output 128 [2021-08-29 09:13:00,988 INFO L354 Elim1Store]: treesize reduction 112, result has 7.4 percent of original size [2021-08-29 09:13:00,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 133 treesize of output 67 [2021-08-29 09:13:01,022 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-29 09:13:01,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 45 treesize of output 23 [2021-08-29 09:13:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:13:01,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:13:01,127 INFO L354 Elim1Store]: treesize reduction 29, result has 42.0 percent of original size [2021-08-29 09:13:01,128 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 34 treesize of output 28 [2021-08-29 09:13:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:13:03,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76576207] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:13:03,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:13:03,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 23 [2021-08-29 09:13:03,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108984603] [2021-08-29 09:13:03,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-29 09:13:03,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:13:03,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-29 09:13:03,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=429, Unknown=1, NotChecked=0, Total=506 [2021-08-29 09:13:03,253 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-08-29 09:13:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:13:03,999 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2021-08-29 09:13:04,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-29 09:13:04,000 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 19 [2021-08-29 09:13:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:13:04,000 INFO L225 Difference]: With dead ends: 106 [2021-08-29 09:13:04,000 INFO L226 Difference]: Without dead ends: 104 [2021-08-29 09:13:04,001 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1633.43ms TimeCoverageRelationStatistics Valid=162, Invalid=707, Unknown=1, NotChecked=0, Total=870 [2021-08-29 09:13:04,001 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 193 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 383.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.93ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 439.73ms IncrementalHoareTripleChecker+Time [2021-08-29 09:13:04,001 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 0 Invalid, 782 Unknown, 0 Unchecked, 2.93ms Time], IncrementalHoareTripleChecker [56 Valid, 496 Invalid, 0 Unknown, 230 Unchecked, 439.73ms Time] [2021-08-29 09:13:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-29 09:13:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2021-08-29 09:13:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:13:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-08-29 09:13:04,005 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 19 [2021-08-29 09:13:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:13:04,005 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-08-29 09:13:04,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-08-29 09:13:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-08-29 09:13:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 09:13:04,006 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:13:04,006 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:13:04,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 09:13:04,208 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 [2021-08-29 09:13:04,209 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:13:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:13:04,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1136543444, now seen corresponding path program 2 times [2021-08-29 09:13:04,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:13:04,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707304972] [2021-08-29 09:13:04,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:13:04,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:13:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:13:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:13:04,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:13:04,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707304972] [2021-08-29 09:13:04,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707304972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:13:04,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792589386] [2021-08-29 09:13:04,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 09:13:04,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:13:04,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:13:04,381 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) [2021-08-29 09:13:04,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 09:13:04,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 09:13:04,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:13:04,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-29 09:13:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:13:04,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:04,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:04,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 179 [2021-08-29 09:13:04,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:04,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:04,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 154 [2021-08-29 09:13:04,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:04,537 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-08-29 09:13:04,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 137 [2021-08-29 09:13:04,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:04,568 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-08-29 09:13:04,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 209 treesize of output 143 [2021-08-29 09:13:04,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:04,582 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-08-29 09:13:04,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 209 treesize of output 160 [2021-08-29 09:13:04,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:04,615 INFO L354 Elim1Store]: treesize reduction 178, result has 18.0 percent of original size [2021-08-29 09:13:04,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 154 treesize of output 166 [2021-08-29 09:13:04,619 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-29 09:13:04,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 161 [2021-08-29 09:13:04,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:04,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:04,809 INFO L354 Elim1Store]: treesize reduction 164, result has 14.1 percent of original size [2021-08-29 09:13:04,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 173 treesize of output 178 [2021-08-29 09:13:04,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:04,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:04,827 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-08-29 09:13:04,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 17 case distinctions, treesize of input 160 treesize of output 115 [2021-08-29 09:13:05,058 INFO L354 Elim1Store]: treesize reduction 223, result has 13.9 percent of original size [2021-08-29 09:13:05,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 183 treesize of output 136 [2021-08-29 09:13:05,091 INFO L354 Elim1Store]: treesize reduction 247, result has 15.1 percent of original size [2021-08-29 09:13:05,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 132 treesize of output 135 [2021-08-29 09:13:05,330 INFO L354 Elim1Store]: treesize reduction 288, result has 6.2 percent of original size [2021-08-29 09:13:05,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 201 treesize of output 125 [2021-08-29 09:13:05,364 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-29 09:13:05,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 60 [2021-08-29 09:13:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:13:05,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:13:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:13:05,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792589386] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:13:05,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:13:05,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2021-08-29 09:13:05,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981351988] [2021-08-29 09:13:05,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-29 09:13:05,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:13:05,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-29 09:13:05,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-29 09:13:05,703 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-08-29 09:13:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:13:08,783 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2021-08-29 09:13:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-29 09:13:08,783 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 20 [2021-08-29 09:13:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:13:08,784 INFO L225 Difference]: With dead ends: 98 [2021-08-29 09:13:08,784 INFO L226 Difference]: Without dead ends: 87 [2021-08-29 09:13:08,784 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2753.42ms TimeCoverageRelationStatistics Valid=176, Invalid=693, Unknown=1, NotChecked=0, Total=870 [2021-08-29 09:13:08,785 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 602.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.32ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 670.72ms IncrementalHoareTripleChecker+Time [2021-08-29 09:13:08,785 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 687 Unknown, 0 Unchecked, 2.32ms Time], IncrementalHoareTripleChecker [27 Valid, 635 Invalid, 0 Unknown, 25 Unchecked, 670.72ms Time] [2021-08-29 09:13:08,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-29 09:13:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2021-08-29 09:13:08,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 83 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:13:08,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2021-08-29 09:13:08,789 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 20 [2021-08-29 09:13:08,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:13:08,789 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2021-08-29 09:13:08,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-08-29 09:13:08,790 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2021-08-29 09:13:08,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 09:13:08,790 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:13:08,790 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:13:08,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 09:13:08,996 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 [2021-08-29 09:13:08,997 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:13:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:13:08,997 INFO L82 PathProgramCache]: Analyzing trace with hash 220535656, now seen corresponding path program 3 times [2021-08-29 09:13:08,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:13:08,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772789806] [2021-08-29 09:13:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:13:08,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:13:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:13:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 09:13:09,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:13:09,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772789806] [2021-08-29 09:13:09,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772789806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:13:09,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378234241] [2021-08-29 09:13:09,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 09:13:09,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:13:09,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:13:09,109 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) [2021-08-29 09:13:09,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 09:13:09,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-29 09:13:09,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:13:09,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-29 09:13:09,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:13:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:09,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 257 [2021-08-29 09:13:09,429 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-08-29 09:13:09,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 260 treesize of output 259 [2021-08-29 09:13:09,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:09,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:09,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 253 treesize of output 228 [2021-08-29 09:13:09,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:09,490 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-08-29 09:13:09,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 289 treesize of output 211 [2021-08-29 09:13:09,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:09,546 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-08-29 09:13:09,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 375 treesize of output 217 [2021-08-29 09:13:09,571 INFO L354 Elim1Store]: treesize reduction 100, result has 18.7 percent of original size [2021-08-29 09:13:09,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 362 treesize of output 324 [2021-08-29 09:13:09,576 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-29 09:13:09,576 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 302 treesize of output 269 [2021-08-29 09:13:09,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:09,589 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-08-29 09:13:09,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 263 treesize of output 214 [2021-08-29 09:13:09,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:09,613 INFO L354 Elim1Store]: treesize reduction 178, result has 18.0 percent of original size [2021-08-29 09:13:09,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 208 treesize of output 220 [2021-08-29 09:13:09,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:09,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:09,800 INFO L354 Elim1Store]: treesize reduction 198, result has 18.5 percent of original size [2021-08-29 09:13:09,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 226 treesize of output 178 [2021-08-29 09:13:09,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:09,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:09,847 INFO L354 Elim1Store]: treesize reduction 318, result has 17.8 percent of original size [2021-08-29 09:13:09,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 222 treesize of output 236 [2021-08-29 09:13:09,865 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-29 09:13:09,865 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 218 treesize of output 222 [2021-08-29 09:13:09,878 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-08-29 09:13:09,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 201 [2021-08-29 09:13:10,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:10,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:10,063 INFO L354 Elim1Store]: treesize reduction 258, result has 12.2 percent of original size [2021-08-29 09:13:10,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 242 treesize of output 182 [2021-08-29 09:13:10,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:10,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:10,107 INFO L354 Elim1Store]: treesize reduction 402, result has 13.0 percent of original size [2021-08-29 09:13:10,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 223 treesize of output 225 [2021-08-29 09:13:10,121 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-08-29 09:13:10,121 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 204 treesize of output 206 [2021-08-29 09:13:10,554 INFO L354 Elim1Store]: treesize reduction 192, result has 0.5 percent of original size [2021-08-29 09:13:10,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 198 treesize of output 142 [2021-08-29 09:13:10,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:10,629 INFO L354 Elim1Store]: treesize reduction 85, result has 19.0 percent of original size [2021-08-29 09:13:10,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 133 [2021-08-29 09:13:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 09:13:10,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:13:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 09:13:13,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378234241] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:13:13,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:13:13,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2021-08-29 09:13:13,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971213474] [2021-08-29 09:13:13,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-29 09:13:13,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:13:13,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-29 09:13:13,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=321, Unknown=1, NotChecked=0, Total=380 [2021-08-29 09:13:13,314 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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) [2021-08-29 09:13:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:13:14,401 INFO L93 Difference]: Finished difference Result 180 states and 220 transitions. [2021-08-29 09:13:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 09:13:14,402 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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 21 [2021-08-29 09:13:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:13:14,402 INFO L225 Difference]: With dead ends: 180 [2021-08-29 09:13:14,402 INFO L226 Difference]: Without dead ends: 145 [2021-08-29 09:13:14,403 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 3164.56ms TimeCoverageRelationStatistics Valid=197, Invalid=672, Unknown=1, NotChecked=0, Total=870 [2021-08-29 09:13:14,403 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 215 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 579.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.59ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 648.21ms IncrementalHoareTripleChecker+Time [2021-08-29 09:13:14,403 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 0 Invalid, 830 Unknown, 0 Unchecked, 2.59ms Time], IncrementalHoareTripleChecker [31 Valid, 696 Invalid, 0 Unknown, 103 Unchecked, 648.21ms Time] [2021-08-29 09:13:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-29 09:13:14,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 108. [2021-08-29 09:13:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 107 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:13:14,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2021-08-29 09:13:14,409 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 21 [2021-08-29 09:13:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:13:14,409 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2021-08-29 09:13:14,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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) [2021-08-29 09:13:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2021-08-29 09:13:14,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 09:13:14,410 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:13:14,410 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:13:14,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-29 09:13:14,623 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 [2021-08-29 09:13:14,623 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:13:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:13:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash -800532698, now seen corresponding path program 3 times [2021-08-29 09:13:14,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:13:14,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212520780] [2021-08-29 09:13:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:13:14,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:13:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:13:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:13:14,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:13:14,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212520780] [2021-08-29 09:13:14,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212520780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:13:14,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635018939] [2021-08-29 09:13:14,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 09:13:14,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:13:14,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:13:14,758 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) [2021-08-29 09:13:14,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-29 09:13:15,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-29 09:13:15,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:13:15,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-29 09:13:15,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:13:15,216 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-08-29 09:13:15,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-08-29 09:13:15,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:15,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:15,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 245 treesize of output 220 [2021-08-29 09:13:15,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:15,273 INFO L354 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2021-08-29 09:13:15,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 269 treesize of output 203 [2021-08-29 09:13:15,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:15,341 INFO L354 Elim1Store]: treesize reduction 82, result has 27.4 percent of original size [2021-08-29 09:13:15,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 355 treesize of output 209 [2021-08-29 09:13:15,345 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 355 treesize of output 328 [2021-08-29 09:13:15,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:15,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:15,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 328 treesize of output 291 [2021-08-29 09:13:15,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:15,381 INFO L354 Elim1Store]: treesize reduction 224, result has 14.8 percent of original size [2021-08-29 09:13:15,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 255 treesize of output 257 [2021-08-29 09:13:15,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 200 [2021-08-29 09:13:15,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:15,555 INFO L354 Elim1Store]: treesize reduction 198, result has 18.5 percent of original size [2021-08-29 09:13:15,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 231 treesize of output 175 [2021-08-29 09:13:15,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:15,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:15,610 INFO L354 Elim1Store]: treesize reduction 318, result has 17.8 percent of original size [2021-08-29 09:13:15,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 227 treesize of output 241 [2021-08-29 09:13:15,625 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-08-29 09:13:15,625 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 223 treesize of output 227 [2021-08-29 09:13:15,633 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-08-29 09:13:15,633 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 215 treesize of output 203 [2021-08-29 09:13:15,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:15,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:15,825 INFO L354 Elim1Store]: treesize reduction 258, result has 12.2 percent of original size [2021-08-29 09:13:15,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 247 treesize of output 179 [2021-08-29 09:13:15,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 09:13:15,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 09:13:15,869 INFO L354 Elim1Store]: treesize reduction 402, result has 13.0 percent of original size [2021-08-29 09:13:15,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 228 treesize of output 230 [2021-08-29 09:13:15,878 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-08-29 09:13:15,878 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 209 treesize of output 208 [2021-08-29 09:13:18,574 INFO L354 Elim1Store]: treesize reduction 217, result has 3.6 percent of original size [2021-08-29 09:13:18,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 119 [2021-08-29 09:13:18,603 INFO L354 Elim1Store]: treesize reduction 194, result has 1.5 percent of original size [2021-08-29 09:13:18,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 62 [2021-08-29 09:13:18,630 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-29 09:13:18,630 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 37 treesize of output 17 [2021-08-29 09:13:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:13:18,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:13:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:13:18,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635018939] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:13:18,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:13:18,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-08-29 09:13:18,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674279042] [2021-08-29 09:13:18,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-29 09:13:18,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:13:18,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-29 09:13:18,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=439, Unknown=1, NotChecked=0, Total=506 [2021-08-29 09:13:18,911 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-08-29 09:13:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:13:20,459 INFO L93 Difference]: Finished difference Result 225 states and 277 transitions. [2021-08-29 09:13:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-29 09:13:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 21 [2021-08-29 09:13:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:13:20,460 INFO L225 Difference]: With dead ends: 225 [2021-08-29 09:13:20,460 INFO L226 Difference]: Without dead ends: 190 [2021-08-29 09:13:20,461 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 3338.85ms TimeCoverageRelationStatistics Valid=271, Invalid=1134, Unknown=1, NotChecked=0, Total=1406 [2021-08-29 09:13:20,461 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 257 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 601.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.07ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 704.63ms IncrementalHoareTripleChecker+Time [2021-08-29 09:13:20,462 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 0 Invalid, 1123 Unknown, 0 Unchecked, 3.07ms Time], IncrementalHoareTripleChecker [58 Valid, 835 Invalid, 0 Unknown, 230 Unchecked, 704.63ms Time] [2021-08-29 09:13:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-08-29 09:13:20,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 130. [2021-08-29 09:13:20,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 128 states have (on average 1.234375) internal successors, (158), 129 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:13:20,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2021-08-29 09:13:20,467 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 21 [2021-08-29 09:13:20,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:13:20,468 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2021-08-29 09:13:20,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-08-29 09:13:20,468 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2021-08-29 09:13:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 09:13:20,468 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:13:20,469 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:13:20,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-29 09:13:20,686 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 [2021-08-29 09:13:20,686 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 09:13:20,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:13:20,687 INFO L82 PathProgramCache]: Analyzing trace with hash -962615628, now seen corresponding path program 1 times [2021-08-29 09:13:20,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:13:20,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746970635] [2021-08-29 09:13:20,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:13:20,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:13:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 09:13:20,706 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 09:13:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 09:13:20,743 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 09:13:20,743 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 09:13:20,744 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2021-08-29 09:13:20,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2021-08-29 09:13:20,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2021-08-29 09:13:20,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2021-08-29 09:13:20,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2021-08-29 09:13:20,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-29 09:13:20,750 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 09:13:20,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 09:13:20 BoogieIcfgContainer [2021-08-29 09:13:20,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 09:13:20,788 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 09:13:20,788 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 09:13:20,788 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 09:13:20,788 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:12:46" (3/4) ... [2021-08-29 09:13:20,789 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 09:13:20,824 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 09:13:20,825 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 09:13:20,825 INFO L158 Benchmark]: Toolchain (without parser) took 34893.81ms. Allocated memory was 52.4MB in the beginning and 142.6MB in the end (delta: 90.2MB). Free memory was 28.7MB in the beginning and 79.6MB in the end (delta: -50.9MB). Peak memory consumption was 39.3MB. Max. memory is 16.1GB. [2021-08-29 09:13:20,825 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 52.4MB. Free memory was 34.7MB in the beginning and 34.7MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 09:13:20,825 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.31ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 28.5MB in the beginning and 42.0MB in the end (delta: -13.5MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2021-08-29 09:13:20,826 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.22ms. Allocated memory is still 65.0MB. Free memory was 41.8MB in the beginning and 39.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 09:13:20,826 INFO L158 Benchmark]: Boogie Preprocessor took 53.43ms. Allocated memory is still 65.0MB. Free memory was 39.8MB in the beginning and 37.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 09:13:20,826 INFO L158 Benchmark]: RCFGBuilder took 228.15ms. Allocated memory is still 65.0MB. Free memory was 37.9MB in the beginning and 36.4MB in the end (delta: 1.4MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2021-08-29 09:13:20,826 INFO L158 Benchmark]: TraceAbstraction took 34202.66ms. Allocated memory was 65.0MB in the beginning and 142.6MB in the end (delta: 77.6MB). Free memory was 35.8MB in the beginning and 82.8MB in the end (delta: -47.0MB). Peak memory consumption was 30.6MB. Max. memory is 16.1GB. [2021-08-29 09:13:20,826 INFO L158 Benchmark]: Witness Printer took 37.11ms. Allocated memory is still 142.6MB. Free memory was 82.8MB in the beginning and 79.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 09:13:20,827 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 52.4MB. Free memory was 34.7MB in the beginning and 34.7MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 325.31ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 28.5MB in the beginning and 42.0MB in the end (delta: -13.5MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.22ms. Allocated memory is still 65.0MB. Free memory was 41.8MB in the beginning and 39.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.43ms. Allocated memory is still 65.0MB. Free memory was 39.8MB in the beginning and 37.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 228.15ms. Allocated memory is still 65.0MB. Free memory was 37.9MB in the beginning and 36.4MB in the end (delta: 1.4MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * TraceAbstraction took 34202.66ms. Allocated memory was 65.0MB in the beginning and 142.6MB in the end (delta: 77.6MB). Free memory was 35.8MB in the beginning and 82.8MB in the end (delta: -47.0MB). Peak memory consumption was 30.6MB. Max. memory is 16.1GB. * Witness Printer took 37.11ms. Allocated memory is still 142.6MB. Free memory was 82.8MB in the beginning and 79.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1061]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1004] BCK* bucket = malloc(sizeof(BCK)); [L1005] bucket->data = 0 [L1006] bucket->list = ((void*)0) [L1008] bucket->next = malloc(sizeof(BCK)) [L1009] EXPR bucket->next [L1009] BCK* bcki = bucket->next; [L1010] bcki->data = 1 [L1011] bcki->list = ((void*)0) [L1013] bcki->next = malloc(sizeof(BCK)) [L1014] EXPR bcki->next [L1014] bcki = bcki->next [L1015] bcki->data = 2 [L1016] bcki->list = ((void*)0) [L1017] bcki->next = ((void*)0) [L1019] struct TSLL* item = ((void*)0); [L1020] struct TSLL* itr = ((void*)0); [L1021] COND TRUE __VERIFIER_nondet_int() [L1023] item = malloc(sizeof(SLL)) [L1024] item->next = ((void*)0) [L1025] COND TRUE __VERIFIER_nondet_int() [L1026] item->data = 0 [L1032] bcki = bucket [L1034] COND FALSE !(!(bcki != ((void*)0))) [L1035] COND FALSE !(!(item != ((void*)0))) [L1036] EXPR bcki->data [L1036] EXPR item->data [L1036] COND FALSE !(bcki->data != item->data) [L1038] COND FALSE !(!(bcki != ((void*)0))) [L1040] EXPR bcki->list [L1040] COND TRUE bcki->list == ((void*)0) [L1041] bcki->list = item [L1021] COND FALSE !(__VERIFIER_nondet_int()) [L1052] bcki = bucket [L1053] COND TRUE bcki != ((void*)0) [L1055] EXPR bcki->list [L1055] item = bcki->list [L1056] bcki->list = ((void*)0) [L1057] COND TRUE item != ((void*)0) [L1059] itr = item [L1060] EXPR item->next [L1060] item = item->next [L1061] EXPR itr->data [L1061] EXPR bcki->data [L1061] COND TRUE !(itr->data != bcki->data) [L1061] reach_error() - UnprovableResult [Line: 1034]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 34130.64ms, OverallIterations: 15, TraceHistogramMax: 4, EmptinessCheckTime: 12.30ms, AutomataDifference: 8124.80ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 6.18ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 904 SdHoareTripleChecker+Valid, 3622.28ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 904 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 3136.66ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1426 IncrementalHoareTripleChecker+Unchecked, 2006 mSDsCounter, 205 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3979 IncrementalHoareTripleChecker+Invalid, 5610 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 205 mSolverCounterUnsat, 0 mSDtfsCounter, 3979 mSolverCounterSat, 20.19ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 481 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 13258.75ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=14, InterpolantAutomatonStates: 126, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 67.38ms AutomataMinimizationTime, 14 MinimizatonAttempts, 233 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 106.81ms SsaConstructionTime, 1070.72ms SatisfiabilityAnalysisTime, 22066.71ms InterpolantComputationTime, 427 NumberOfCodeBlocks, 427 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 535 ConstructedInterpolants, 94 QuantifiedInterpolants, 28247 SizeOfPredicates, 90 NumberOfNonLiveVariables, 1266 ConjunctsInSsa, 340 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 54/171 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! [2021-08-29 09:13:20,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...