./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20/simple-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20/simple-array-sum.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 1f79095c90328fd0ea6c5d7ba05d768e32089263 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 21:23:27,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 21:23:27,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 21:23:27,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 21:23:27,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 21:23:27,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 21:23:27,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 21:23:27,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 21:23:27,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 21:23:27,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 21:23:27,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 21:23:27,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 21:23:27,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 21:23:27,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 21:23:27,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 21:23:27,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 21:23:27,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 21:23:27,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 21:23:27,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 21:23:27,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 21:23:27,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 21:23:27,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 21:23:27,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 21:23:27,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 21:23:27,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 21:23:27,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 21:23:27,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 21:23:27,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 21:23:27,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 21:23:27,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 21:23:27,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 21:23:27,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 21:23:27,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 21:23:27,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 21:23:27,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 21:23:27,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 21:23:27,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 21:23:27,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 21:23:27,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 21:23:27,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 21:23:27,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 21:23:27,667 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 21:23:27,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 21:23:27,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 21:23:27,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 21:23:27,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 21:23:27,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 21:23:27,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 21:23:27,716 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 21:23:27,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 21:23:27,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 21:23:27,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 21:23:27,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 21:23:27,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 21:23:27,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 21:23:27,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 21:23:27,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 21:23:27,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 21:23:27,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 21:23:27,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 21:23:27,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 21:23:27,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 21:23:27,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 21:23:27,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 21:23:27,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 21:23:27,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 21:23:27,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 21:23:27,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 21:23:27,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 21:23:27,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 21:23:27,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 21:23:27,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 21:23:27,732 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f79095c90328fd0ea6c5d7ba05d768e32089263 [2021-10-05 21:23:28,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 21:23:28,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 21:23:28,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 21:23:28,181 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 21:23:28,182 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 21:23:28,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20/simple-array-sum.wvr.c [2021-10-05 21:23:28,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2c6c2691/ebdf76ef76cc4d8bbd9983104357e9b4/FLAG0ef62ecc9 [2021-10-05 21:23:28,902 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 21:23:28,903 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/simple-array-sum.wvr.c [2021-10-05 21:23:28,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2c6c2691/ebdf76ef76cc4d8bbd9983104357e9b4/FLAG0ef62ecc9 [2021-10-05 21:23:29,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2c6c2691/ebdf76ef76cc4d8bbd9983104357e9b4 [2021-10-05 21:23:29,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 21:23:29,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 21:23:29,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 21:23:29,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 21:23:29,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 21:23:29,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 09:23:29" (1/1) ... [2021-10-05 21:23:29,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3847fa96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:23:29, skipping insertion in model container [2021-10-05 21:23:29,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 09:23:29" (1/1) ... [2021-10-05 21:23:29,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 21:23:29,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 21:23:29,539 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/simple-array-sum.wvr.c[2136,2149] [2021-10-05 21:23:29,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 21:23:29,559 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 21:23:29,585 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/simple-array-sum.wvr.c[2136,2149] [2021-10-05 21:23:29,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 21:23:29,607 INFO L208 MainTranslator]: Completed translation [2021-10-05 21:23:29,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:23:29 WrapperNode [2021-10-05 21:23:29,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 21:23:29,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 21:23:29,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 21:23:29,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 21:23:29,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:23:29" (1/1) ... [2021-10-05 21:23:29,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:23:29" (1/1) ... [2021-10-05 21:23:29,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 21:23:29,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 21:23:29,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 21:23:29,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 21:23:29,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:23:29" (1/1) ... [2021-10-05 21:23:29,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:23:29" (1/1) ... [2021-10-05 21:23:29,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:23:29" (1/1) ... [2021-10-05 21:23:29,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:23:29" (1/1) ... [2021-10-05 21:23:29,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:23:29" (1/1) ... [2021-10-05 21:23:29,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:23:29" (1/1) ... [2021-10-05 21:23:29,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:23:29" (1/1) ... [2021-10-05 21:23:29,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 21:23:29,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 21:23:29,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 21:23:29,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 21:23:29,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:23:29" (1/1) ... [2021-10-05 21:23:29,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 21:23:29,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:29,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-05 21:23:29,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-05 21:23:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 21:23:29,804 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 21:23:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 21:23:29,805 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 21:23:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-05 21:23:29,805 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-05 21:23:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 21:23:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 21:23:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 21:23:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-05 21:23:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 21:23:29,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 21:23:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 21:23:29,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 21:23:29,809 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 21:23:30,302 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 21:23:30,302 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-05 21:23:30,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:23:30 BoogieIcfgContainer [2021-10-05 21:23:30,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 21:23:30,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 21:23:30,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 21:23:30,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 21:23:30,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 09:23:29" (1/3) ... [2021-10-05 21:23:30,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15bba867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 09:23:30, skipping insertion in model container [2021-10-05 21:23:30,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:23:29" (2/3) ... [2021-10-05 21:23:30,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15bba867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 09:23:30, skipping insertion in model container [2021-10-05 21:23:30,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:23:30" (3/3) ... [2021-10-05 21:23:30,315 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-array-sum.wvr.c [2021-10-05 21:23:30,321 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 21:23:30,321 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 21:23:30,322 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 21:23:30,322 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 21:23:30,359 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,360 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,360 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,360 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,361 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,361 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,361 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,362 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,362 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,362 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,362 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,363 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,363 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,363 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,364 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,364 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,364 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,364 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,365 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,365 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,365 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,365 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,366 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,366 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,367 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,367 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,367 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,367 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,368 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,368 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,368 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,369 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,369 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,370 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,370 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,370 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,371 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,371 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,371 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,372 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,372 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,372 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,372 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,373 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,373 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,373 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,373 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,374 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,374 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,374 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,375 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,375 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,375 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,376 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,376 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,376 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,377 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,377 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,377 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,378 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,378 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,378 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,379 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,379 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,387 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,388 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,388 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,388 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,388 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,389 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,389 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,389 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,390 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,390 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,390 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,390 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,391 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,391 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,395 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,395 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,395 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,396 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,396 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,401 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,401 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,401 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,402 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,402 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,404 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,404 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,405 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,405 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,405 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:23:30,414 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-05 21:23:30,467 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 21:23:30,475 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 [2021-10-05 21:23:30,476 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-05 21:23:30,495 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 21:23:30,511 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 155 transitions, 334 flow [2021-10-05 21:23:30,515 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 155 transitions, 334 flow [2021-10-05 21:23:30,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 151 places, 155 transitions, 334 flow [2021-10-05 21:23:30,618 INFO L129 PetriNetUnfolder]: 14/152 cut-off events. [2021-10-05 21:23:30,623 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-05 21:23:30,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 152 events. 14/152 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 119 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 116. Up to 3 conditions per place. [2021-10-05 21:23:30,638 INFO L116 LiptonReduction]: Number of co-enabled transitions 1714 [2021-10-05 21:23:36,731 INFO L131 LiptonReduction]: Checked pairs total: 2477 [2021-10-05 21:23:36,732 INFO L133 LiptonReduction]: Total number of compositions: 142 [2021-10-05 21:23:36,741 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 34 transitions, 92 flow [2021-10-05 21:23:36,773 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 21:23:36,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:36,792 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:36,792 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:36,798 INFO L82 PathProgramCache]: Analyzing trace with hash 470800, now seen corresponding path program 1 times [2021-10-05 21:23:36,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:36,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715528006] [2021-10-05 21:23:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:36,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:23:37,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:37,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715528006] [2021-10-05 21:23:37,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715528006] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:23:37,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:23:37,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 21:23:37,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108874571] [2021-10-05 21:23:37,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 21:23:37,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:37,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 21:23:37,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:23:37,414 INFO L87 Difference]: Start difference. First operand has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 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, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:37,541 INFO L93 Difference]: Finished difference Result 418 states and 1414 transitions. [2021-10-05 21:23:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:23:37,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2021-10-05 21:23:37,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:37,576 INFO L225 Difference]: With dead ends: 418 [2021-10-05 21:23:37,576 INFO L226 Difference]: Without dead ends: 395 [2021-10-05 21:23:37,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:23:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-10-05 21:23:37,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 353. [2021-10-05 21:23:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.4232954545454546) internal successors, (1205), 352 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1205 transitions. [2021-10-05 21:23:37,708 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1205 transitions. Word has length 21 [2021-10-05 21:23:37,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:37,710 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1205 transitions. [2021-10-05 21:23:37,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:37,710 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1205 transitions. [2021-10-05 21:23:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-05 21:23:37,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:37,724 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:37,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 21:23:37,725 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:37,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1959247856, now seen corresponding path program 1 times [2021-10-05 21:23:37,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:37,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492983004] [2021-10-05 21:23:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:37,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:23:37,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:37,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492983004] [2021-10-05 21:23:37,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492983004] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:23:37,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:23:37,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-05 21:23:37,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163527096] [2021-10-05 21:23:37,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 21:23:37,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:37,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 21:23:37,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-05 21:23:37,817 INFO L87 Difference]: Start difference. First operand 353 states and 1205 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:37,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:37,933 INFO L93 Difference]: Finished difference Result 831 states and 2700 transitions. [2021-10-05 21:23:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 21:23:37,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-05 21:23:37,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:37,943 INFO L225 Difference]: With dead ends: 831 [2021-10-05 21:23:37,944 INFO L226 Difference]: Without dead ends: 791 [2021-10-05 21:23:37,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-05 21:23:37,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-10-05 21:23:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 439. [2021-10-05 21:23:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.365296803652968) internal successors, (1474), 438 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1474 transitions. [2021-10-05 21:23:37,995 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1474 transitions. Word has length 22 [2021-10-05 21:23:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:37,995 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1474 transitions. [2021-10-05 21:23:37,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1474 transitions. [2021-10-05 21:23:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-05 21:23:37,999 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:37,999 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:37,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 21:23:38,000 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:38,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1009111846, now seen corresponding path program 1 times [2021-10-05 21:23:38,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:38,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210991341] [2021-10-05 21:23:38,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:38,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:23:38,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:38,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210991341] [2021-10-05 21:23:38,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210991341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:38,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090781070] [2021-10-05 21:23:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:38,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:38,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:38,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:38,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-05 21:23:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:38,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-05 21:23:38,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:23:38,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090781070] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:38,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:38,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-05 21:23:38,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241386967] [2021-10-05 21:23:38,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 21:23:38,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:38,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 21:23:38,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-05 21:23:38,328 INFO L87 Difference]: Start difference. First operand 439 states and 1474 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:38,457 INFO L93 Difference]: Finished difference Result 644 states and 2158 transitions. [2021-10-05 21:23:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 21:23:38,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-05 21:23:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:38,465 INFO L225 Difference]: With dead ends: 644 [2021-10-05 21:23:38,466 INFO L226 Difference]: Without dead ends: 644 [2021-10-05 21:23:38,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-05 21:23:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-10-05 21:23:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 394. [2021-10-05 21:23:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.3944020356234095) internal successors, (1334), 393 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:38,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1334 transitions. [2021-10-05 21:23:38,490 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1334 transitions. Word has length 22 [2021-10-05 21:23:38,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:38,491 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1334 transitions. [2021-10-05 21:23:38,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1334 transitions. [2021-10-05 21:23:38,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-05 21:23:38,494 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:38,494 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:38,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-05 21:23:38,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:38,709 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:38,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:38,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1318645559, now seen corresponding path program 1 times [2021-10-05 21:23:38,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:38,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007596924] [2021-10-05 21:23:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:38,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:23:38,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:38,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007596924] [2021-10-05 21:23:38,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007596924] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:23:38,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:23:38,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 21:23:38,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644381316] [2021-10-05 21:23:38,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 21:23:38,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:38,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 21:23:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:23:38,768 INFO L87 Difference]: Start difference. First operand 394 states and 1334 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:38,789 INFO L93 Difference]: Finished difference Result 594 states and 1927 transitions. [2021-10-05 21:23:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:23:38,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-05 21:23:38,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:38,795 INFO L225 Difference]: With dead ends: 594 [2021-10-05 21:23:38,796 INFO L226 Difference]: Without dead ends: 568 [2021-10-05 21:23:38,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:23:38,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-10-05 21:23:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 532. [2021-10-05 21:23:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 3.3389830508474576) internal successors, (1773), 531 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1773 transitions. [2021-10-05 21:23:38,846 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1773 transitions. Word has length 23 [2021-10-05 21:23:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:38,846 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1773 transitions. [2021-10-05 21:23:38,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1773 transitions. [2021-10-05 21:23:38,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-05 21:23:38,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:38,850 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:38,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-05 21:23:38,850 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:38,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1965289749, now seen corresponding path program 1 times [2021-10-05 21:23:38,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:38,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457176655] [2021-10-05 21:23:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:38,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:23:38,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:38,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457176655] [2021-10-05 21:23:38,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457176655] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:38,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482579624] [2021-10-05 21:23:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:38,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:38,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:38,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:38,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-05 21:23:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:38,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-05 21:23:38,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:23:39,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482579624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:39,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:39,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-05 21:23:39,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465995040] [2021-10-05 21:23:39,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 21:23:39,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:39,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 21:23:39,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-05 21:23:39,090 INFO L87 Difference]: Start difference. First operand 532 states and 1773 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:39,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:39,202 INFO L93 Difference]: Finished difference Result 812 states and 2657 transitions. [2021-10-05 21:23:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-05 21:23:39,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-05 21:23:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:39,210 INFO L225 Difference]: With dead ends: 812 [2021-10-05 21:23:39,210 INFO L226 Difference]: Without dead ends: 662 [2021-10-05 21:23:39,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-05 21:23:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-10-05 21:23:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 606. [2021-10-05 21:23:39,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.3636363636363638) internal successors, (2035), 605 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:39,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2035 transitions. [2021-10-05 21:23:39,240 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2035 transitions. Word has length 23 [2021-10-05 21:23:39,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:39,240 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 2035 transitions. [2021-10-05 21:23:39,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:39,241 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2035 transitions. [2021-10-05 21:23:39,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-05 21:23:39,244 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:39,244 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:39,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:39,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:39,459 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:39,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:39,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1150212981, now seen corresponding path program 1 times [2021-10-05 21:23:39,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:39,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502472734] [2021-10-05 21:23:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:39,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:23:39,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:39,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502472734] [2021-10-05 21:23:39,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502472734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:39,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063955505] [2021-10-05 21:23:39,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:39,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:39,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:39,542 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:39,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-05 21:23:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:39,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-05 21:23:39,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:23:39,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063955505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:39,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:39,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-05 21:23:39,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448938283] [2021-10-05 21:23:39,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 21:23:39,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:39,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 21:23:39,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-05 21:23:39,735 INFO L87 Difference]: Start difference. First operand 606 states and 2035 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:39,847 INFO L93 Difference]: Finished difference Result 736 states and 2445 transitions. [2021-10-05 21:23:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-05 21:23:39,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-05 21:23:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:39,854 INFO L225 Difference]: With dead ends: 736 [2021-10-05 21:23:39,855 INFO L226 Difference]: Without dead ends: 704 [2021-10-05 21:23:39,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-05 21:23:39,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-10-05 21:23:39,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 520. [2021-10-05 21:23:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 3.4778420038535645) internal successors, (1805), 519 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1805 transitions. [2021-10-05 21:23:39,880 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1805 transitions. Word has length 24 [2021-10-05 21:23:39,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:39,881 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1805 transitions. [2021-10-05 21:23:39,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1805 transitions. [2021-10-05 21:23:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-05 21:23:39,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:39,884 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:39,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:40,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:40,099 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:40,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:40,100 INFO L82 PathProgramCache]: Analyzing trace with hash -465258631, now seen corresponding path program 1 times [2021-10-05 21:23:40,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:40,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515587545] [2021-10-05 21:23:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:40,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:23:40,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:40,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515587545] [2021-10-05 21:23:40,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515587545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:40,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969075293] [2021-10-05 21:23:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:40,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:40,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:40,157 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:40,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-05 21:23:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:40,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-05 21:23:40,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:23:40,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969075293] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:23:40,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-05 21:23:40,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-05 21:23:40,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848566381] [2021-10-05 21:23:40,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 21:23:40,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:40,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 21:23:40,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-05 21:23:40,371 INFO L87 Difference]: Start difference. First operand 520 states and 1805 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:40,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:40,432 INFO L93 Difference]: Finished difference Result 422 states and 1397 transitions. [2021-10-05 21:23:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 21:23:40,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-05 21:23:40,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:40,436 INFO L225 Difference]: With dead ends: 422 [2021-10-05 21:23:40,436 INFO L226 Difference]: Without dead ends: 370 [2021-10-05 21:23:40,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-05 21:23:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-10-05 21:23:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2021-10-05 21:23:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.4525745257452574) internal successors, (1274), 369 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:40,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1274 transitions. [2021-10-05 21:23:40,452 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1274 transitions. Word has length 26 [2021-10-05 21:23:40,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:40,453 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1274 transitions. [2021-10-05 21:23:40,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1274 transitions. [2021-10-05 21:23:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-05 21:23:40,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:40,455 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:40,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:40,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:40,669 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:40,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:40,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1235492800, now seen corresponding path program 1 times [2021-10-05 21:23:40,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:40,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222073937] [2021-10-05 21:23:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:40,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:23:40,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:40,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222073937] [2021-10-05 21:23:40,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222073937] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:40,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816685818] [2021-10-05 21:23:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:40,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:40,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:40,727 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:40,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-05 21:23:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:40,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-05 21:23:40,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:23:40,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816685818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:40,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:40,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-05 21:23:40,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345464407] [2021-10-05 21:23:40,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-05 21:23:40,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:40,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-05 21:23:40,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-05 21:23:40,913 INFO L87 Difference]: Start difference. First operand 370 states and 1274 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:40,997 INFO L93 Difference]: Finished difference Result 596 states and 2034 transitions. [2021-10-05 21:23:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 21:23:40,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-05 21:23:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:41,004 INFO L225 Difference]: With dead ends: 596 [2021-10-05 21:23:41,005 INFO L226 Difference]: Without dead ends: 572 [2021-10-05 21:23:41,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-05 21:23:41,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-10-05 21:23:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 400. [2021-10-05 21:23:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.418546365914787) internal successors, (1364), 399 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1364 transitions. [2021-10-05 21:23:41,032 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1364 transitions. Word has length 29 [2021-10-05 21:23:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:41,033 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1364 transitions. [2021-10-05 21:23:41,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:41,033 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1364 transitions. [2021-10-05 21:23:41,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-05 21:23:41,035 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:41,036 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:41,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-05 21:23:41,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:41,251 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:41,253 INFO L82 PathProgramCache]: Analyzing trace with hash -878856174, now seen corresponding path program 2 times [2021-10-05 21:23:41,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:41,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951548789] [2021-10-05 21:23:41,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:41,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:23:41,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:41,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951548789] [2021-10-05 21:23:41,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951548789] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:41,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987680937] [2021-10-05 21:23:41,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:23:41,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:41,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:41,309 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:41,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-05 21:23:41,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:23:41,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:23:41,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-05 21:23:41,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:23:41,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987680937] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:41,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:41,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-05 21:23:41,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101846936] [2021-10-05 21:23:41,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-05 21:23:41,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:41,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-05 21:23:41,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-05 21:23:41,530 INFO L87 Difference]: Start difference. First operand 400 states and 1364 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-10-05 21:23:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:41,606 INFO L93 Difference]: Finished difference Result 532 states and 1798 transitions. [2021-10-05 21:23:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-05 21:23:41,607 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 29 [2021-10-05 21:23:41,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:41,612 INFO L225 Difference]: With dead ends: 532 [2021-10-05 21:23:41,612 INFO L226 Difference]: Without dead ends: 520 [2021-10-05 21:23:41,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-05 21:23:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-10-05 21:23:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 400. [2021-10-05 21:23:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.418546365914787) internal successors, (1364), 399 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1364 transitions. [2021-10-05 21:23:41,631 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1364 transitions. Word has length 29 [2021-10-05 21:23:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:41,632 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1364 transitions. [2021-10-05 21:23:41,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-10-05 21:23:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1364 transitions. [2021-10-05 21:23:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-05 21:23:41,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:41,634 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:41,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:41,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:41,848 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2085781314, now seen corresponding path program 3 times [2021-10-05 21:23:41,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:41,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055379144] [2021-10-05 21:23:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:41,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:23:41,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:41,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055379144] [2021-10-05 21:23:41,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055379144] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:41,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800279068] [2021-10-05 21:23:41,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:23:41,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:41,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:41,935 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:41,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-05 21:23:42,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 21:23:42,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:23:42,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-05 21:23:42,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:23:42,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800279068] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:42,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:42,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-05 21:23:42,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919987712] [2021-10-05 21:23:42,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-05 21:23:42,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:42,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-05 21:23:42,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-05 21:23:42,143 INFO L87 Difference]: Start difference. First operand 400 states and 1364 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-10-05 21:23:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:42,197 INFO L93 Difference]: Finished difference Result 546 states and 1830 transitions. [2021-10-05 21:23:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-05 21:23:42,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 29 [2021-10-05 21:23:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:42,204 INFO L225 Difference]: With dead ends: 546 [2021-10-05 21:23:42,204 INFO L226 Difference]: Without dead ends: 514 [2021-10-05 21:23:42,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-10-05 21:23:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-10-05 21:23:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 454. [2021-10-05 21:23:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.3951434878587197) internal successors, (1538), 453 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1538 transitions. [2021-10-05 21:23:42,222 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1538 transitions. Word has length 29 [2021-10-05 21:23:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:42,223 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1538 transitions. [2021-10-05 21:23:42,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-10-05 21:23:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1538 transitions. [2021-10-05 21:23:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-05 21:23:42,226 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:42,226 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:42,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:42,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-05 21:23:42,441 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:42,442 INFO L82 PathProgramCache]: Analyzing trace with hash 229978402, now seen corresponding path program 4 times [2021-10-05 21:23:42,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:42,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799868740] [2021-10-05 21:23:42,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:42,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:23:42,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:42,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799868740] [2021-10-05 21:23:42,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799868740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:42,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604347937] [2021-10-05 21:23:42,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:23:42,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:42,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:42,532 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:42,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-05 21:23:42,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:23:42,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:23:42,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-05 21:23:42,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:23:42,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604347937] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:42,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:42,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-10-05 21:23:42,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982561526] [2021-10-05 21:23:42,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-05 21:23:42,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:42,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-05 21:23:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-05 21:23:42,774 INFO L87 Difference]: Start difference. First operand 454 states and 1538 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:43,126 INFO L93 Difference]: Finished difference Result 911 states and 2974 transitions. [2021-10-05 21:23:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-05 21:23:43,127 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-05 21:23:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:43,133 INFO L225 Difference]: With dead ends: 911 [2021-10-05 21:23:43,133 INFO L226 Difference]: Without dead ends: 708 [2021-10-05 21:23:43,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2021-10-05 21:23:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-10-05 21:23:43,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 464. [2021-10-05 21:23:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.3779697624190064) internal successors, (1564), 463 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1564 transitions. [2021-10-05 21:23:43,156 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1564 transitions. Word has length 32 [2021-10-05 21:23:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:43,157 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1564 transitions. [2021-10-05 21:23:43,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1564 transitions. [2021-10-05 21:23:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-05 21:23:43,159 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:43,159 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:43,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:43,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-05 21:23:43,374 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:43,375 INFO L82 PathProgramCache]: Analyzing trace with hash 529363175, now seen corresponding path program 5 times [2021-10-05 21:23:43,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:43,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185918753] [2021-10-05 21:23:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:43,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:23:43,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:43,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185918753] [2021-10-05 21:23:43,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185918753] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:43,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542248690] [2021-10-05 21:23:43,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:23:43,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:43,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:43,472 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:43,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-05 21:23:43,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 21:23:43,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:23:43,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-05 21:23:43,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-05 21:23:43,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542248690] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:43,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:43,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-05 21:23:43,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050933886] [2021-10-05 21:23:43,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 21:23:43,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:43,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 21:23:43,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-05 21:23:43,776 INFO L87 Difference]: Start difference. First operand 464 states and 1564 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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) [2021-10-05 21:23:43,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:43,983 INFO L93 Difference]: Finished difference Result 716 states and 2458 transitions. [2021-10-05 21:23:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 21:23:43,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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 34 [2021-10-05 21:23:43,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:43,990 INFO L225 Difference]: With dead ends: 716 [2021-10-05 21:23:43,991 INFO L226 Difference]: Without dead ends: 716 [2021-10-05 21:23:43,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-10-05 21:23:43,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-10-05 21:23:44,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 548. [2021-10-05 21:23:44,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.4040219378427787) internal successors, (1862), 547 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1862 transitions. [2021-10-05 21:23:44,013 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1862 transitions. Word has length 34 [2021-10-05 21:23:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:44,014 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 1862 transitions. [2021-10-05 21:23:44,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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) [2021-10-05 21:23:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1862 transitions. [2021-10-05 21:23:44,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-05 21:23:44,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:44,017 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:44,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:44,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:44,231 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:44,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:44,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2056340489, now seen corresponding path program 6 times [2021-10-05 21:23:44,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:44,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68793417] [2021-10-05 21:23:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:44,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-05 21:23:44,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:44,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68793417] [2021-10-05 21:23:44,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68793417] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:44,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176054553] [2021-10-05 21:23:44,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:23:44,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:44,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:44,310 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:44,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-05 21:23:44,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-05 21:23:44,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:23:44,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-05 21:23:44,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:23:44,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176054553] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:44,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:44,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-05 21:23:44,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273733060] [2021-10-05 21:23:44,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 21:23:44,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:44,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 21:23:44,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-05 21:23:44,708 INFO L87 Difference]: Start difference. First operand 548 states and 1862 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:44,916 INFO L93 Difference]: Finished difference Result 920 states and 3252 transitions. [2021-10-05 21:23:44,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 21:23:44,916 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-05 21:23:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:44,925 INFO L225 Difference]: With dead ends: 920 [2021-10-05 21:23:44,925 INFO L226 Difference]: Without dead ends: 920 [2021-10-05 21:23:44,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-10-05 21:23:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-10-05 21:23:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 648. [2021-10-05 21:23:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.474497681607419) internal successors, (2248), 647 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2248 transitions. [2021-10-05 21:23:44,971 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2248 transitions. Word has length 35 [2021-10-05 21:23:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:44,971 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 2248 transitions. [2021-10-05 21:23:44,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2248 transitions. [2021-10-05 21:23:44,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-05 21:23:44,975 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:44,975 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:45,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:45,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-05 21:23:45,189 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:45,190 INFO L82 PathProgramCache]: Analyzing trace with hash 455706096, now seen corresponding path program 7 times [2021-10-05 21:23:45,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:45,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750184244] [2021-10-05 21:23:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:45,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:23:45,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:45,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750184244] [2021-10-05 21:23:45,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750184244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:45,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273869728] [2021-10-05 21:23:45,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:23:45,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:45,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:45,260 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:45,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-05 21:23:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:45,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-05 21:23:45,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:23:45,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273869728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:45,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:45,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 21:23:45,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987880787] [2021-10-05 21:23:45,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 21:23:45,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:45,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 21:23:45,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-05 21:23:45,575 INFO L87 Difference]: Start difference. First operand 648 states and 2248 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 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) [2021-10-05 21:23:45,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:45,706 INFO L93 Difference]: Finished difference Result 1040 states and 3612 transitions. [2021-10-05 21:23:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 21:23:45,706 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-05 21:23:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:45,715 INFO L225 Difference]: With dead ends: 1040 [2021-10-05 21:23:45,715 INFO L226 Difference]: Without dead ends: 984 [2021-10-05 21:23:45,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:23:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-10-05 21:23:45,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 828. [2021-10-05 21:23:45,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.471584038694075) internal successors, (2871), 827 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:45,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2871 transitions. [2021-10-05 21:23:45,746 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2871 transitions. Word has length 37 [2021-10-05 21:23:45,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:45,747 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 2871 transitions. [2021-10-05 21:23:45,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 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) [2021-10-05 21:23:45,747 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2871 transitions. [2021-10-05 21:23:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-05 21:23:45,751 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:45,751 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:45,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:45,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:45,966 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:45,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:45,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1902201154, now seen corresponding path program 8 times [2021-10-05 21:23:45,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:45,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888382299] [2021-10-05 21:23:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:45,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:23:46,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:46,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888382299] [2021-10-05 21:23:46,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888382299] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:46,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633423100] [2021-10-05 21:23:46,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:23:46,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:46,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:46,043 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:46,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-05 21:23:46,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:23:46,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:23:46,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-05 21:23:46,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:23:46,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633423100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:46,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:46,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 21:23:46,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992546079] [2021-10-05 21:23:46,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 21:23:46,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:46,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 21:23:46,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-05 21:23:46,361 INFO L87 Difference]: Start difference. First operand 828 states and 2871 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:46,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:46,533 INFO L93 Difference]: Finished difference Result 1278 states and 4422 transitions. [2021-10-05 21:23:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 21:23:46,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-05 21:23:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:46,545 INFO L225 Difference]: With dead ends: 1278 [2021-10-05 21:23:46,545 INFO L226 Difference]: Without dead ends: 1236 [2021-10-05 21:23:46,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:23:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-10-05 21:23:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 792. [2021-10-05 21:23:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4740834386852084) internal successors, (2748), 791 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:46,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2748 transitions. [2021-10-05 21:23:46,580 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2748 transitions. Word has length 37 [2021-10-05 21:23:46,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:46,580 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 2748 transitions. [2021-10-05 21:23:46,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2748 transitions. [2021-10-05 21:23:46,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-05 21:23:46,584 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:46,585 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:46,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:46,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-05 21:23:46,800 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash -934344930, now seen corresponding path program 9 times [2021-10-05 21:23:46,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:46,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171084751] [2021-10-05 21:23:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:46,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:23:46,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:46,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171084751] [2021-10-05 21:23:46,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171084751] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:46,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426489536] [2021-10-05 21:23:46,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:23:46,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:46,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:46,875 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:46,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-05 21:23:47,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-05 21:23:47,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:23:47,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-05 21:23:47,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:23:47,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426489536] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:47,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:47,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 21:23:47,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332397211] [2021-10-05 21:23:47,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-05 21:23:47,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:47,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-05 21:23:47,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-05 21:23:47,208 INFO L87 Difference]: Start difference. First operand 792 states and 2748 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:47,430 INFO L93 Difference]: Finished difference Result 1386 states and 4827 transitions. [2021-10-05 21:23:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-05 21:23:47,430 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-05 21:23:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:47,441 INFO L225 Difference]: With dead ends: 1386 [2021-10-05 21:23:47,441 INFO L226 Difference]: Without dead ends: 1344 [2021-10-05 21:23:47,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:23:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-10-05 21:23:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 792. [2021-10-05 21:23:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4740834386852084) internal successors, (2748), 791 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2748 transitions. [2021-10-05 21:23:47,473 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2748 transitions. Word has length 37 [2021-10-05 21:23:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:47,473 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 2748 transitions. [2021-10-05 21:23:47,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:47,473 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2748 transitions. [2021-10-05 21:23:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-05 21:23:47,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:47,477 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:47,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:47,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-05 21:23:47,691 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:47,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:47,692 INFO L82 PathProgramCache]: Analyzing trace with hash 518963790, now seen corresponding path program 10 times [2021-10-05 21:23:47,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:47,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307350043] [2021-10-05 21:23:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:47,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:23:47,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:47,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307350043] [2021-10-05 21:23:47,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307350043] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:47,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327126950] [2021-10-05 21:23:47,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:23:47,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:47,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:47,766 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:47,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-05 21:23:47,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:23:47,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:23:47,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-05 21:23:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:23:48,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327126950] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:48,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:48,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-05 21:23:48,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185393158] [2021-10-05 21:23:48,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-05 21:23:48,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:48,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-05 21:23:48,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-05 21:23:48,055 INFO L87 Difference]: Start difference. First operand 792 states and 2748 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:48,196 INFO L93 Difference]: Finished difference Result 1188 states and 4095 transitions. [2021-10-05 21:23:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-05 21:23:48,197 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-05 21:23:48,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:48,205 INFO L225 Difference]: With dead ends: 1188 [2021-10-05 21:23:48,206 INFO L226 Difference]: Without dead ends: 1122 [2021-10-05 21:23:48,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:23:48,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-10-05 21:23:48,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 858. [2021-10-05 21:23:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.455075845974329) internal successors, (2961), 857 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2961 transitions. [2021-10-05 21:23:48,237 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2961 transitions. Word has length 37 [2021-10-05 21:23:48,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:48,238 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 2961 transitions. [2021-10-05 21:23:48,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:48,238 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2961 transitions. [2021-10-05 21:23:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-05 21:23:48,241 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:48,241 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:48,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-05 21:23:48,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-05 21:23:48,456 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:48,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:48,457 INFO L82 PathProgramCache]: Analyzing trace with hash -805778812, now seen corresponding path program 11 times [2021-10-05 21:23:48,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:48,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886198956] [2021-10-05 21:23:48,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:48,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 21:23:48,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:48,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886198956] [2021-10-05 21:23:48,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886198956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:48,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465219289] [2021-10-05 21:23:48,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:23:48,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:48,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:48,538 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:48,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-05 21:23:48,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-05 21:23:48,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:23:48,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-05 21:23:48,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:23:48,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465219289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:48,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:48,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-10-05 21:23:48,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218572881] [2021-10-05 21:23:48,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:23:48,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:48,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:23:48,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:23:48,960 INFO L87 Difference]: Start difference. First operand 858 states and 2961 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 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) [2021-10-05 21:23:49,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:49,573 INFO L93 Difference]: Finished difference Result 1868 states and 6431 transitions. [2021-10-05 21:23:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-05 21:23:49,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-05 21:23:49,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:49,601 INFO L225 Difference]: With dead ends: 1868 [2021-10-05 21:23:49,602 INFO L226 Difference]: Without dead ends: 1474 [2021-10-05 21:23:49,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-10-05 21:23:49,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-10-05 21:23:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1140. [2021-10-05 21:23:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.4995610184372254) internal successors, (3986), 1139 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3986 transitions. [2021-10-05 21:23:49,653 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3986 transitions. Word has length 40 [2021-10-05 21:23:49,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:49,653 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3986 transitions. [2021-10-05 21:23:49,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 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) [2021-10-05 21:23:49,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3986 transitions. [2021-10-05 21:23:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-05 21:23:49,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:49,658 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:49,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:49,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-05 21:23:49,873 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:49,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:49,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1995955831, now seen corresponding path program 12 times [2021-10-05 21:23:49,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:49,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336236054] [2021-10-05 21:23:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:49,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-05 21:23:49,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:49,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336236054] [2021-10-05 21:23:49,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336236054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:49,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062100410] [2021-10-05 21:23:49,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:23:49,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:49,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:49,957 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:49,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-05 21:23:50,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-05 21:23:50,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:23:50,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-05 21:23:50,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-05 21:23:50,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062100410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:50,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:50,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 21:23:50,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062700430] [2021-10-05 21:23:50,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:23:50,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:50,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:23:50,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:23:50,415 INFO L87 Difference]: Start difference. First operand 1140 states and 3986 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:50,612 INFO L93 Difference]: Finished difference Result 1330 states and 4670 transitions. [2021-10-05 21:23:50,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 21:23:50,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-05 21:23:50,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:50,619 INFO L225 Difference]: With dead ends: 1330 [2021-10-05 21:23:50,619 INFO L226 Difference]: Without dead ends: 1330 [2021-10-05 21:23:50,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:23:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-10-05 21:23:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1330. [2021-10-05 21:23:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.5139202407825434) internal successors, (4670), 1329 states have internal predecessors, (4670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4670 transitions. [2021-10-05 21:23:50,662 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4670 transitions. Word has length 42 [2021-10-05 21:23:50,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:50,662 INFO L470 AbstractCegarLoop]: Abstraction has 1330 states and 4670 transitions. [2021-10-05 21:23:50,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:50,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4670 transitions. [2021-10-05 21:23:50,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-05 21:23:50,667 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:50,667 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:50,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:50,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:50,882 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:50,883 INFO L82 PathProgramCache]: Analyzing trace with hash 194225881, now seen corresponding path program 13 times [2021-10-05 21:23:50,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:50,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927826770] [2021-10-05 21:23:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:50,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-05 21:23:50,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:50,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927826770] [2021-10-05 21:23:50,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927826770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:50,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049052223] [2021-10-05 21:23:50,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:23:50,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:50,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:50,968 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:50,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-05 21:23:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:51,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-05 21:23:51,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-05 21:23:51,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049052223] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:51,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:51,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 21:23:51,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190991420] [2021-10-05 21:23:51,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:23:51,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:51,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:23:51,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:23:51,440 INFO L87 Difference]: Start difference. First operand 1330 states and 4670 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:51,658 INFO L93 Difference]: Finished difference Result 1862 states and 6642 transitions. [2021-10-05 21:23:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 21:23:51,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-05 21:23:51,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:51,666 INFO L225 Difference]: With dead ends: 1862 [2021-10-05 21:23:51,667 INFO L226 Difference]: Without dead ends: 1862 [2021-10-05 21:23:51,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2021-10-05 21:23:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-10-05 21:23:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1162. [2021-10-05 21:23:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 3.4900947459086993) internal successors, (4052), 1161 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 4052 transitions. [2021-10-05 21:23:51,710 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 4052 transitions. Word has length 43 [2021-10-05 21:23:51,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:51,711 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 4052 transitions. [2021-10-05 21:23:51,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:51,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 4052 transitions. [2021-10-05 21:23:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-05 21:23:51,716 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:51,716 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:51,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:51,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:51,931 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:51,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1940916946, now seen corresponding path program 14 times [2021-10-05 21:23:51,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:51,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398970313] [2021-10-05 21:23:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:51,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-05 21:23:52,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:52,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398970313] [2021-10-05 21:23:52,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398970313] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:52,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268797049] [2021-10-05 21:23:52,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:23:52,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:52,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:52,039 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:52,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-05 21:23:52,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:23:52,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:23:52,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-05 21:23:52,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-05 21:23:52,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268797049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:52,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:52,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-05 21:23:52,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652965977] [2021-10-05 21:23:52,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:23:52,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:23:52,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:23:52,488 INFO L87 Difference]: Start difference. First operand 1162 states and 4052 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:52,748 INFO L93 Difference]: Finished difference Result 1970 states and 6918 transitions. [2021-10-05 21:23:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 21:23:52,748 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-05 21:23:52,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:52,754 INFO L225 Difference]: With dead ends: 1970 [2021-10-05 21:23:52,754 INFO L226 Difference]: Without dead ends: 1890 [2021-10-05 21:23:52,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-10-05 21:23:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-10-05 21:23:52,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1582. [2021-10-05 21:23:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.553447185325743) internal successors, (5618), 1581 states have internal predecessors, (5618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5618 transitions. [2021-10-05 21:23:52,823 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5618 transitions. Word has length 45 [2021-10-05 21:23:52,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:52,824 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 5618 transitions. [2021-10-05 21:23:52,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:52,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5618 transitions. [2021-10-05 21:23:52,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-05 21:23:52,829 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:23:52,829 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:23:52,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:53,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:53,044 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:23:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:23:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash -316561372, now seen corresponding path program 15 times [2021-10-05 21:23:53,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:23:53,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513406622] [2021-10-05 21:23:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:23:53,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:23:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:23:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-05 21:23:53,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:23:53,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513406622] [2021-10-05 21:23:53,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513406622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:53,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851607011] [2021-10-05 21:23:53,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:23:53,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:23:53,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:23:53,134 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:23:53,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-05 21:23:53,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-05 21:23:53,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:23:53,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-05 21:23:53,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:23:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-05 21:23:53,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851607011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:23:53,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:23:53,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-10-05 21:23:53,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771117607] [2021-10-05 21:23:53,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 21:23:53,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:23:53,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 21:23:53,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-05 21:23:53,540 INFO L87 Difference]: Start difference. First operand 1582 states and 5618 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 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) [2021-10-05 21:23:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:23:54,460 INFO L93 Difference]: Finished difference Result 2556 states and 9226 transitions. [2021-10-05 21:23:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-05 21:23:54,461 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 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 45 [2021-10-05 21:23:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:23:54,461 INFO L225 Difference]: With dead ends: 2556 [2021-10-05 21:23:54,461 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 21:23:54,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 550.2ms TimeCoverageRelationStatistics Valid=408, Invalid=1398, Unknown=0, NotChecked=0, Total=1806 [2021-10-05 21:23:54,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 21:23:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 21:23:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:23:54,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 21:23:54,463 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2021-10-05 21:23:54,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:23:54,463 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 21:23:54,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 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) [2021-10-05 21:23:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 21:23:54,463 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 21:23:54,465 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 21:23:54,466 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 21:23:54,466 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 21:23:54,466 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-05 21:23:54,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-05 21:23:54,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-05 21:23:54,672 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 21:23:54,672 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 21:23:54,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 09:23:54 BasicIcfg [2021-10-05 21:23:54,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 21:23:54,674 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 21:23:54,674 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 21:23:54,674 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 21:23:54,675 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:23:30" (3/4) ... [2021-10-05 21:23:54,678 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 21:23:54,684 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 21:23:54,684 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 21:23:54,684 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-05 21:23:54,689 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-05 21:23:54,690 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-05 21:23:54,690 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 21:23:54,690 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 21:23:54,748 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 21:23:54,748 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 21:23:54,750 INFO L168 Benchmark]: Toolchain (without parser) took 25476.77 ms. Allocated memory was 48.2 MB in the beginning and 182.5 MB in the end (delta: 134.2 MB). Free memory was 23.6 MB in the beginning and 81.1 MB in the end (delta: -57.5 MB). Peak memory consumption was 78.0 MB. Max. memory is 16.1 GB. [2021-10-05 21:23:54,751 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 48.2 MB. Free memory was 25.2 MB in the beginning and 25.1 MB in the end (delta: 42.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 21:23:54,755 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.60 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 23.3 MB in the beginning and 34.3 MB in the end (delta: -11.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-05 21:23:54,755 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.37 ms. Allocated memory is still 58.7 MB. Free memory was 34.3 MB in the beginning and 32.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 21:23:54,756 INFO L168 Benchmark]: Boogie Preprocessor took 35.05 ms. Allocated memory is still 58.7 MB. Free memory was 32.6 MB in the beginning and 31.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 21:23:54,756 INFO L168 Benchmark]: RCFGBuilder took 613.68 ms. Allocated memory is still 58.7 MB. Free memory was 31.0 MB in the beginning and 31.4 MB in the end (delta: -408.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-05 21:23:54,757 INFO L168 Benchmark]: TraceAbstraction took 24365.76 ms. Allocated memory was 58.7 MB in the beginning and 182.5 MB in the end (delta: 123.7 MB). Free memory was 31.1 MB in the beginning and 85.0 MB in the end (delta: -53.9 MB). Peak memory consumption was 70.6 MB. Max. memory is 16.1 GB. [2021-10-05 21:23:54,758 INFO L168 Benchmark]: Witness Printer took 74.30 ms. Allocated memory is still 182.5 MB. Free memory was 85.0 MB in the beginning and 81.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-05 21:23:54,761 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 48.2 MB. Free memory was 25.2 MB in the beginning and 25.1 MB in the end (delta: 42.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 328.60 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 23.3 MB in the beginning and 34.3 MB in the end (delta: -11.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.37 ms. Allocated memory is still 58.7 MB. Free memory was 34.3 MB in the beginning and 32.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.05 ms. Allocated memory is still 58.7 MB. Free memory was 32.6 MB in the beginning and 31.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 613.68 ms. Allocated memory is still 58.7 MB. Free memory was 31.0 MB in the beginning and 31.4 MB in the end (delta: -408.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24365.76 ms. Allocated memory was 58.7 MB in the beginning and 182.5 MB in the end (delta: 123.7 MB). Free memory was 31.1 MB in the beginning and 85.0 MB in the end (delta: -53.9 MB). Peak memory consumption was 70.6 MB. Max. memory is 16.1 GB. * Witness Printer took 74.30 ms. Allocated memory is still 182.5 MB. Free memory was 85.0 MB in the beginning and 81.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6217.4ms, 151 PlacesBefore, 38 PlacesAfterwards, 155 TransitionsBefore, 34 TransitionsAfterwards, 1714 CoEnabledTransitionPairs, 6 FixpointIterations, 88 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 142 TotalNumberOfCompositions, 2477 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1807, positive: 1730, positive conditional: 0, positive unconditional: 1730, negative: 77, negative conditional: 0, negative unconditional: 77, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1050, positive: 1023, positive conditional: 0, positive unconditional: 1023, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1050, positive: 1023, positive conditional: 0, positive unconditional: 1023, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 27, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 65, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 65, negative conditional: 0, negative unconditional: 65, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1807, positive: 707, positive conditional: 0, positive unconditional: 707, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 1050, unknown conditional: 0, unknown unconditional: 1050] , Statistics on independence cache: Total cache size (in pairs): 109, Positive cache size: 99, Positive conditional cache size: 0, Positive unconditional cache size: 99, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 83]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 177 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 24207.0ms, OverallIterations: 22, TraceHistogramMax: 3, EmptinessCheckTime: 91.1ms, AutomataDifference: 4816.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6297.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1117 SDtfs, 2692 SDslu, 4282 SDs, 0 SdLazy, 3443 SolverSat, 267 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2018.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 982 GetRequests, 666 SyntacticMatches, 5 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2481.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1582occurred in iteration=21, InterpolantAutomatonStates: 253, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 784.2ms AutomataMinimizationTime, 22 MinimizatonAttempts, 4714 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 306.3ms SsaConstructionTime, 1265.6ms SatisfiabilityAnalysisTime, 4111.1ms InterpolantComputationTime, 1358 NumberOfCodeBlocks, 1339 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 1317 ConstructedInterpolants, 0 QuantifiedInterpolants, 3802 SizeOfPredicates, 54 NumberOfNonLiveVariables, 4045 ConjunctsInSsa, 121 ConjunctsInUnsatCore, 41 InterpolantComputations, 4 PerfectInterpolantSequences, 417/602 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-05 21:23:54,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...