./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test/easy11.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/test/easy11.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 ab91e1352b541f109b0f669e9a265c919fcd73b2 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-03 11:54:26,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-03 11:54:26,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-03 11:54:26,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-03 11:54:26,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-03 11:54:26,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-03 11:54:26,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-03 11:54:26,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-03 11:54:26,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-03 11:54:26,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-03 11:54:26,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-03 11:54:26,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-03 11:54:26,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-03 11:54:26,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-03 11:54:26,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-03 11:54:26,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-03 11:54:26,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-03 11:54:26,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-03 11:54:26,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-03 11:54:26,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-03 11:54:26,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-03 11:54:26,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-03 11:54:26,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-03 11:54:26,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-03 11:54:26,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-03 11:54:26,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-03 11:54:26,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-03 11:54:26,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-03 11:54:26,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-03 11:54:26,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-03 11:54:26,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-03 11:54:26,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-03 11:54:26,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-03 11:54:26,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-03 11:54:26,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-03 11:54:26,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-03 11:54:26,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-03 11:54:26,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-03 11:54:26,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-03 11:54:26,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-03 11:54:26,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-03 11:54:26,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-03 11:54:26,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-03 11:54:26,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-03 11:54:26,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-03 11:54:26,768 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-03 11:54:26,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-03 11:54:26,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-03 11:54:26,770 INFO L138 SettingsManager]: * Use SBE=true [2021-10-03 11:54:26,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-03 11:54:26,770 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-03 11:54:26,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-03 11:54:26,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-03 11:54:26,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-03 11:54:26,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-03 11:54:26,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-03 11:54:26,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-03 11:54:26,772 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-03 11:54:26,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-03 11:54:26,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-03 11:54:26,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-03 11:54:26,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-03 11:54:26,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-03 11:54:26,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-03 11:54:26,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 11:54:26,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-03 11:54:26,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-03 11:54:26,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-03 11:54:26,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-03 11:54:26,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-03 11:54:26,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-03 11:54:26,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-03 11:54:26,776 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab91e1352b541f109b0f669e9a265c919fcd73b2 [2021-10-03 11:54:27,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-03 11:54:27,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-03 11:54:27,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-03 11:54:27,252 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-03 11:54:27,253 INFO L275 PluginConnector]: CDTParser initialized [2021-10-03 11:54:27,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test/easy11.wvr.c [2021-10-03 11:54:27,336 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43c08ae4b/daf7dec1159b4f99b3a3773d98af940c/FLAGf023ea07d [2021-10-03 11:54:27,919 INFO L306 CDTParser]: Found 1 translation units. [2021-10-03 11:54:27,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test/easy11.wvr.c [2021-10-03 11:54:27,920 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 11:54:27,920 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 11:54:27,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43c08ae4b/daf7dec1159b4f99b3a3773d98af940c/FLAGf023ea07d [2021-10-03 11:54:28,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43c08ae4b/daf7dec1159b4f99b3a3773d98af940c [2021-10-03 11:54:28,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-03 11:54:28,296 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-03 11:54:28,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-03 11:54:28,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-03 11:54:28,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-03 11:54:28,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 11:54:28" (1/1) ... [2021-10-03 11:54:28,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a1fe15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:28, skipping insertion in model container [2021-10-03 11:54:28,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 11:54:28" (1/1) ... [2021-10-03 11:54:28,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-03 11:54:28,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-03 11:54:28,495 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 11:54:28,546 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/test/easy11.wvr.c[851,864] [2021-10-03 11:54:28,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 11:54:28,561 INFO L203 MainTranslator]: Completed pre-run [2021-10-03 11:54:28,573 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 11:54:28,585 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/test/easy11.wvr.c[851,864] [2021-10-03 11:54:28,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 11:54:28,604 INFO L208 MainTranslator]: Completed translation [2021-10-03 11:54:28,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:28 WrapperNode [2021-10-03 11:54:28,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-03 11:54:28,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-03 11:54:28,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-03 11:54:28,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-03 11:54:28,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:28" (1/1) ... [2021-10-03 11:54:28,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:28" (1/1) ... [2021-10-03 11:54:28,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-03 11:54:28,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-03 11:54:28,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-03 11:54:28,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-03 11:54:28,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:28" (1/1) ... [2021-10-03 11:54:28,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:28" (1/1) ... [2021-10-03 11:54:28,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:28" (1/1) ... [2021-10-03 11:54:28,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:28" (1/1) ... [2021-10-03 11:54:28,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:28" (1/1) ... [2021-10-03 11:54:28,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:28" (1/1) ... [2021-10-03 11:54:28,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:28" (1/1) ... [2021-10-03 11:54:28,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-03 11:54:28,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-03 11:54:28,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-03 11:54:28,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-03 11:54:28,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:28" (1/1) ... [2021-10-03 11:54:28,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 11:54:28,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:28,718 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) [2021-10-03 11:54:28,736 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 [2021-10-03 11:54:28,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-03 11:54:28,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-03 11:54:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-03 11:54:28,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-03 11:54:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-03 11:54:28,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-03 11:54:28,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-03 11:54:28,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-03 11:54:28,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-03 11:54:28,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-03 11:54:28,788 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-03 11:54:29,134 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-03 11:54:29,138 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-03 11:54:29,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 11:54:29 BoogieIcfgContainer [2021-10-03 11:54:29,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-03 11:54:29,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-03 11:54:29,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-03 11:54:29,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-03 11:54:29,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 11:54:28" (1/3) ... [2021-10-03 11:54:29,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686167a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 11:54:29, skipping insertion in model container [2021-10-03 11:54:29,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:28" (2/3) ... [2021-10-03 11:54:29,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686167a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 11:54:29, skipping insertion in model container [2021-10-03 11:54:29,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 11:54:29" (3/3) ... [2021-10-03 11:54:29,168 INFO L111 eAbstractionObserver]: Analyzing ICFG easy11.wvr.c [2021-10-03 11:54:29,181 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-03 11:54:29,182 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-03 11:54:29,182 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-03 11:54:29,183 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-03 11:54:29,261 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,261 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,262 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,262 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,262 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,263 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,263 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,263 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,263 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,264 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,267 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,267 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,268 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,268 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,268 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,268 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,268 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,269 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,269 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,269 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,270 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,272 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,272 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,272 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,273 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,273 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,273 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,274 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,274 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,274 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,274 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,274 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,275 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,279 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,279 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,280 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,280 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,280 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,280 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,281 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,286 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,287 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,287 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,288 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,294 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,294 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,295 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,295 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:29,305 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-03 11:54:29,365 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-03 11:54:29,374 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 [2021-10-03 11:54:29,374 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-03 11:54:29,391 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-03 11:54:29,405 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 70 transitions, 156 flow [2021-10-03 11:54:29,409 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 70 transitions, 156 flow [2021-10-03 11:54:29,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 71 places, 70 transitions, 156 flow [2021-10-03 11:54:29,459 INFO L129 PetriNetUnfolder]: 6/68 cut-off events. [2021-10-03 11:54:29,460 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-03 11:54:29,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 68 events. 6/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2021-10-03 11:54:29,467 INFO L116 LiptonReduction]: Number of co-enabled transitions 500 [2021-10-03 11:54:31,194 INFO L131 LiptonReduction]: Checked pairs total: 494 [2021-10-03 11:54:31,195 INFO L133 LiptonReduction]: Total number of compositions: 61 [2021-10-03 11:54:31,206 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-10-03 11:54:31,220 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 11:54:31,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:31,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:31,233 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:31,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:31,240 INFO L82 PathProgramCache]: Analyzing trace with hash 184642015, now seen corresponding path program 1 times [2021-10-03 11:54:31,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:31,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658137605] [2021-10-03 11:54:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:31,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:31,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:31,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658137605] [2021-10-03 11:54:31,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658137605] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:31,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:31,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:31,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092231332] [2021-10-03 11:54:31,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 11:54:31,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:31,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 11:54:31,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:54:31,649 INFO L87 Difference]: Start difference. First operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 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 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:31,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:31,759 INFO L93 Difference]: Finished difference Result 59 states and 130 transitions. [2021-10-03 11:54:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:54:31,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 11:54:31,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:31,774 INFO L225 Difference]: With dead ends: 59 [2021-10-03 11:54:31,775 INFO L226 Difference]: Without dead ends: 54 [2021-10-03 11:54:31,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:54:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-03 11:54:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-10-03 11:54:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 102 transitions. [2021-10-03 11:54:31,823 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 102 transitions. Word has length 13 [2021-10-03 11:54:31,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:31,824 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 102 transitions. [2021-10-03 11:54:31,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 102 transitions. [2021-10-03 11:54:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 11:54:31,826 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:31,827 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:31,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-03 11:54:31,828 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:31,829 INFO L82 PathProgramCache]: Analyzing trace with hash 21976111, now seen corresponding path program 2 times [2021-10-03 11:54:31,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:31,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129849181] [2021-10-03 11:54:31,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:31,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:32,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:32,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129849181] [2021-10-03 11:54:32,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129849181] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:32,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:32,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:32,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64188813] [2021-10-03 11:54:32,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 11:54:32,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 11:54:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:54:32,055 INFO L87 Difference]: Start difference. First operand 48 states and 102 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:32,170 INFO L93 Difference]: Finished difference Result 59 states and 129 transitions. [2021-10-03 11:54:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:54:32,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 11:54:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:32,174 INFO L225 Difference]: With dead ends: 59 [2021-10-03 11:54:32,174 INFO L226 Difference]: Without dead ends: 54 [2021-10-03 11:54:32,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:54:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-03 11:54:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-10-03 11:54:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2021-10-03 11:54:32,195 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 13 [2021-10-03 11:54:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:32,196 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2021-10-03 11:54:32,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2021-10-03 11:54:32,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 11:54:32,199 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:32,200 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:32,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-03 11:54:32,201 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:32,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:32,214 INFO L82 PathProgramCache]: Analyzing trace with hash 188209891, now seen corresponding path program 3 times [2021-10-03 11:54:32,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:32,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144191128] [2021-10-03 11:54:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:32,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:32,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:32,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144191128] [2021-10-03 11:54:32,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144191128] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:32,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:32,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:32,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166083195] [2021-10-03 11:54:32,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 11:54:32,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:32,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 11:54:32,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:54:32,369 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:32,458 INFO L93 Difference]: Finished difference Result 63 states and 138 transitions. [2021-10-03 11:54:32,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:54:32,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 11:54:32,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:32,461 INFO L225 Difference]: With dead ends: 63 [2021-10-03 11:54:32,461 INFO L226 Difference]: Without dead ends: 58 [2021-10-03 11:54:32,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:54:32,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-03 11:54:32,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-10-03 11:54:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2021-10-03 11:54:32,469 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 13 [2021-10-03 11:54:32,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:32,470 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2021-10-03 11:54:32,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,471 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2021-10-03 11:54:32,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 11:54:32,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:32,472 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:32,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-03 11:54:32,472 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:32,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:32,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1631079547, now seen corresponding path program 4 times [2021-10-03 11:54:32,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:32,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673686811] [2021-10-03 11:54:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:32,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:32,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:32,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673686811] [2021-10-03 11:54:32,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673686811] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:32,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:32,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:32,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146927259] [2021-10-03 11:54:32,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 11:54:32,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:32,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 11:54:32,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:54:32,584 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:32,659 INFO L93 Difference]: Finished difference Result 67 states and 147 transitions. [2021-10-03 11:54:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:54:32,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 11:54:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:32,661 INFO L225 Difference]: With dead ends: 67 [2021-10-03 11:54:32,661 INFO L226 Difference]: Without dead ends: 62 [2021-10-03 11:54:32,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:54:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-03 11:54:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-10-03 11:54:32,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2545454545454544) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 124 transitions. [2021-10-03 11:54:32,669 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 124 transitions. Word has length 13 [2021-10-03 11:54:32,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:32,669 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 124 transitions. [2021-10-03 11:54:32,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,670 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 124 transitions. [2021-10-03 11:54:32,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 11:54:32,671 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:32,671 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:32,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-03 11:54:32,672 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:32,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1632863485, now seen corresponding path program 5 times [2021-10-03 11:54:32,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:32,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350897349] [2021-10-03 11:54:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:32,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:32,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:32,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350897349] [2021-10-03 11:54:32,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350897349] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:32,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:32,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:32,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961212911] [2021-10-03 11:54:32,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 11:54:32,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:32,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 11:54:32,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:54:32,787 INFO L87 Difference]: Start difference. First operand 56 states and 124 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:32,876 INFO L93 Difference]: Finished difference Result 67 states and 151 transitions. [2021-10-03 11:54:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:54:32,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 11:54:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:32,878 INFO L225 Difference]: With dead ends: 67 [2021-10-03 11:54:32,879 INFO L226 Difference]: Without dead ends: 62 [2021-10-03 11:54:32,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:54:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-03 11:54:32,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2021-10-03 11:54:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-10-03 11:54:32,886 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 13 [2021-10-03 11:54:32,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:32,887 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-10-03 11:54:32,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,887 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-10-03 11:54:32,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 11:54:32,888 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:32,888 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:32,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-03 11:54:32,889 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:32,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:32,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1799097265, now seen corresponding path program 6 times [2021-10-03 11:54:32,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:32,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839598103] [2021-10-03 11:54:32,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:32,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:33,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:33,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839598103] [2021-10-03 11:54:33,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839598103] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:33,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:33,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:33,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189498939] [2021-10-03 11:54:33,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 11:54:33,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:33,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 11:54:33,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:54:33,029 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:33,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:33,122 INFO L93 Difference]: Finished difference Result 69 states and 157 transitions. [2021-10-03 11:54:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:54:33,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 11:54:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:33,125 INFO L225 Difference]: With dead ends: 69 [2021-10-03 11:54:33,125 INFO L226 Difference]: Without dead ends: 64 [2021-10-03 11:54:33,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:54:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-03 11:54:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-10-03 11:54:33,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2545454545454544) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 124 transitions. [2021-10-03 11:54:33,137 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 124 transitions. Word has length 13 [2021-10-03 11:54:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:33,142 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 124 transitions. [2021-10-03 11:54:33,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 124 transitions. [2021-10-03 11:54:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:33,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:33,145 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:33,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-03 11:54:33,145 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:33,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1565603098, now seen corresponding path program 1 times [2021-10-03 11:54:33,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:33,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130623127] [2021-10-03 11:54:33,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:33,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:33,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:33,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130623127] [2021-10-03 11:54:33,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130623127] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:33,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737627874] [2021-10-03 11:54:33,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:33,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:33,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:33,232 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) [2021-10-03 11:54:33,255 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 [2021-10-03 11:54:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:33,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-03 11:54:33,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:33,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737627874] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:33,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:33,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-03 11:54:33,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323756906] [2021-10-03 11:54:33,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 11:54:33,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:33,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 11:54:33,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-03 11:54:33,395 INFO L87 Difference]: Start difference. First operand 56 states and 124 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:33,465 INFO L93 Difference]: Finished difference Result 76 states and 168 transitions. [2021-10-03 11:54:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 11:54:33,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:33,467 INFO L225 Difference]: With dead ends: 76 [2021-10-03 11:54:33,468 INFO L226 Difference]: Without dead ends: 76 [2021-10-03 11:54:33,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:54:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-03 11:54:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2021-10-03 11:54:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.392156862745098) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 122 transitions. [2021-10-03 11:54:33,481 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 122 transitions. Word has length 14 [2021-10-03 11:54:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:33,482 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 122 transitions. [2021-10-03 11:54:33,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:33,483 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 122 transitions. [2021-10-03 11:54:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:33,486 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:33,486 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:33,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-03 11:54:33,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:33,688 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1836523419, now seen corresponding path program 1 times [2021-10-03 11:54:33,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:33,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392574156] [2021-10-03 11:54:33,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:33,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:33,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:33,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392574156] [2021-10-03 11:54:33,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392574156] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:33,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:33,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:33,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523334314] [2021-10-03 11:54:33,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 11:54:33,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:33,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 11:54:33,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-03 11:54:33,738 INFO L87 Difference]: Start difference. First operand 52 states and 122 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:33,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:33,794 INFO L93 Difference]: Finished difference Result 80 states and 171 transitions. [2021-10-03 11:54:33,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:54:33,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:33,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:33,797 INFO L225 Difference]: With dead ends: 80 [2021-10-03 11:54:33,797 INFO L226 Difference]: Without dead ends: 70 [2021-10-03 11:54:33,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:54:33,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-03 11:54:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2021-10-03 11:54:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 118 transitions. [2021-10-03 11:54:33,804 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 118 transitions. Word has length 14 [2021-10-03 11:54:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:33,804 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 118 transitions. [2021-10-03 11:54:33,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 118 transitions. [2021-10-03 11:54:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:33,806 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:33,806 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:33,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-03 11:54:33,806 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:33,807 INFO L82 PathProgramCache]: Analyzing trace with hash -796919087, now seen corresponding path program 2 times [2021-10-03 11:54:33,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:33,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070581484] [2021-10-03 11:54:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:33,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:33,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:33,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070581484] [2021-10-03 11:54:33,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070581484] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:33,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659270902] [2021-10-03 11:54:33,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:54:33,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:33,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:33,851 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) [2021-10-03 11:54:33,861 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 [2021-10-03 11:54:33,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 11:54:33,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:33,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-03 11:54:33,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:34,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659270902] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:34,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:34,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-03 11:54:34,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761569447] [2021-10-03 11:54:34,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 11:54:34,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:34,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 11:54:34,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-03 11:54:34,007 INFO L87 Difference]: Start difference. First operand 52 states and 118 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:34,068 INFO L93 Difference]: Finished difference Result 92 states and 200 transitions. [2021-10-03 11:54:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 11:54:34,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:34,070 INFO L225 Difference]: With dead ends: 92 [2021-10-03 11:54:34,070 INFO L226 Difference]: Without dead ends: 92 [2021-10-03 11:54:34,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:54:34,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-03 11:54:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 56. [2021-10-03 11:54:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 55 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 134 transitions. [2021-10-03 11:54:34,076 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 134 transitions. Word has length 14 [2021-10-03 11:54:34,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:34,076 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 134 transitions. [2021-10-03 11:54:34,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,077 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 134 transitions. [2021-10-03 11:54:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:34,078 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:34,081 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:34,163 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 [2021-10-03 11:54:34,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:34,294 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:34,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:34,295 INFO L82 PathProgramCache]: Analyzing trace with hash 90584594, now seen corresponding path program 2 times [2021-10-03 11:54:34,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:34,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814503960] [2021-10-03 11:54:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:34,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:34,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:34,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814503960] [2021-10-03 11:54:34,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814503960] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:34,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:34,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:34,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659032179] [2021-10-03 11:54:34,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 11:54:34,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:34,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 11:54:34,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-03 11:54:34,351 INFO L87 Difference]: Start difference. First operand 56 states and 134 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:34,397 INFO L93 Difference]: Finished difference Result 82 states and 182 transitions. [2021-10-03 11:54:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 11:54:34,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:34,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:34,400 INFO L225 Difference]: With dead ends: 82 [2021-10-03 11:54:34,400 INFO L226 Difference]: Without dead ends: 82 [2021-10-03 11:54:34,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:54:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-03 11:54:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2021-10-03 11:54:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 55 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 134 transitions. [2021-10-03 11:54:34,418 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 134 transitions. Word has length 14 [2021-10-03 11:54:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:34,418 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 134 transitions. [2021-10-03 11:54:34,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 134 transitions. [2021-10-03 11:54:34,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:34,423 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:34,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:34,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-03 11:54:34,424 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:34,425 INFO L82 PathProgramCache]: Analyzing trace with hash 951243062, now seen corresponding path program 3 times [2021-10-03 11:54:34,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:34,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475760590] [2021-10-03 11:54:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:34,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:34,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:34,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475760590] [2021-10-03 11:54:34,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475760590] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:34,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:34,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:34,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319900631] [2021-10-03 11:54:34,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 11:54:34,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:34,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 11:54:34,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-03 11:54:34,483 INFO L87 Difference]: Start difference. First operand 56 states and 134 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:34,533 INFO L93 Difference]: Finished difference Result 72 states and 158 transitions. [2021-10-03 11:54:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 11:54:34,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:34,537 INFO L225 Difference]: With dead ends: 72 [2021-10-03 11:54:34,537 INFO L226 Difference]: Without dead ends: 70 [2021-10-03 11:54:34,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:54:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-03 11:54:34,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2021-10-03 11:54:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.4) internal successors, (132), 55 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 132 transitions. [2021-10-03 11:54:34,545 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 132 transitions. Word has length 14 [2021-10-03 11:54:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:34,546 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 132 transitions. [2021-10-03 11:54:34,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 132 transitions. [2021-10-03 11:54:34,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:34,549 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:34,549 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:34,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-03 11:54:34,550 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:34,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1947127575, now seen corresponding path program 3 times [2021-10-03 11:54:34,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:34,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327067920] [2021-10-03 11:54:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:34,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:34,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:34,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327067920] [2021-10-03 11:54:34,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327067920] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:34,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:34,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:34,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23487626] [2021-10-03 11:54:34,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 11:54:34,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:34,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 11:54:34,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-03 11:54:34,604 INFO L87 Difference]: Start difference. First operand 56 states and 132 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:34,683 INFO L93 Difference]: Finished difference Result 88 states and 185 transitions. [2021-10-03 11:54:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-03 11:54:34,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:34,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:34,689 INFO L225 Difference]: With dead ends: 88 [2021-10-03 11:54:34,690 INFO L226 Difference]: Without dead ends: 84 [2021-10-03 11:54:34,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:54:34,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-03 11:54:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2021-10-03 11:54:34,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 55 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2021-10-03 11:54:34,711 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 14 [2021-10-03 11:54:34,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:34,711 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2021-10-03 11:54:34,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,712 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2021-10-03 11:54:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:34,713 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:34,715 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:34,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-03 11:54:34,716 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:34,717 INFO L82 PathProgramCache]: Analyzing trace with hash 72947849, now seen corresponding path program 4 times [2021-10-03 11:54:34,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:34,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424103393] [2021-10-03 11:54:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:34,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:34,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:34,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424103393] [2021-10-03 11:54:34,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424103393] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:34,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037298199] [2021-10-03 11:54:34,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 11:54:34,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:34,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:34,769 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) [2021-10-03 11:54:34,794 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 [2021-10-03 11:54:34,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 11:54:34,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:34,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-03 11:54:34,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:34,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037298199] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:34,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:34,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-03 11:54:34,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272877522] [2021-10-03 11:54:34,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 11:54:34,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 11:54:34,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-03 11:54:34,883 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:34,926 INFO L93 Difference]: Finished difference Result 76 states and 173 transitions. [2021-10-03 11:54:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 11:54:34,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:34,927 INFO L225 Difference]: With dead ends: 76 [2021-10-03 11:54:34,928 INFO L226 Difference]: Without dead ends: 76 [2021-10-03 11:54:34,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:54:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-03 11:54:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-10-03 11:54:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2021-10-03 11:54:34,931 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 14 [2021-10-03 11:54:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:34,932 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2021-10-03 11:54:34,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2021-10-03 11:54:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:34,933 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:34,933 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:34,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-03 11:54:35,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:35,146 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:35,147 INFO L82 PathProgramCache]: Analyzing trace with hash -706157974, now seen corresponding path program 4 times [2021-10-03 11:54:35,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:35,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47393183] [2021-10-03 11:54:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:35,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:35,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:35,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47393183] [2021-10-03 11:54:35,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47393183] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:35,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:35,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:35,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632135505] [2021-10-03 11:54:35,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 11:54:35,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:35,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 11:54:35,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-03 11:54:35,181 INFO L87 Difference]: Start difference. First operand 54 states and 127 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:35,228 INFO L93 Difference]: Finished difference Result 74 states and 164 transitions. [2021-10-03 11:54:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:54:35,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:35,230 INFO L225 Difference]: With dead ends: 74 [2021-10-03 11:54:35,230 INFO L226 Difference]: Without dead ends: 70 [2021-10-03 11:54:35,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:54:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-03 11:54:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2021-10-03 11:54:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 125 transitions. [2021-10-03 11:54:35,235 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 125 transitions. Word has length 14 [2021-10-03 11:54:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:35,235 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 125 transitions. [2021-10-03 11:54:35,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,236 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 125 transitions. [2021-10-03 11:54:35,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:35,237 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:35,237 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:35,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-03 11:54:35,238 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:35,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:35,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1895949251, now seen corresponding path program 5 times [2021-10-03 11:54:35,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:35,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823985691] [2021-10-03 11:54:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:35,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:35,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:35,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823985691] [2021-10-03 11:54:35,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823985691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:35,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242729175] [2021-10-03 11:54:35,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 11:54:35,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:35,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:35,273 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) [2021-10-03 11:54:35,295 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 [2021-10-03 11:54:35,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 11:54:35,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:35,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-03 11:54:35,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:35,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242729175] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:35,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:35,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-03 11:54:35,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166906396] [2021-10-03 11:54:35,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 11:54:35,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:35,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 11:54:35,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-03 11:54:35,383 INFO L87 Difference]: Start difference. First operand 54 states and 125 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:35,428 INFO L93 Difference]: Finished difference Result 80 states and 178 transitions. [2021-10-03 11:54:35,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 11:54:35,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:35,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:35,430 INFO L225 Difference]: With dead ends: 80 [2021-10-03 11:54:35,430 INFO L226 Difference]: Without dead ends: 80 [2021-10-03 11:54:35,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:54:35,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-03 11:54:35,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-10-03 11:54:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 125 transitions. [2021-10-03 11:54:35,434 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 125 transitions. Word has length 14 [2021-10-03 11:54:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:35,435 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 125 transitions. [2021-10-03 11:54:35,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 125 transitions. [2021-10-03 11:54:35,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:35,436 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:35,436 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:35,482 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 [2021-10-03 11:54:35,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-03 11:54:35,651 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:35,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1511514364, now seen corresponding path program 5 times [2021-10-03 11:54:35,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:35,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424129609] [2021-10-03 11:54:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:35,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:35,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:35,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424129609] [2021-10-03 11:54:35,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424129609] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:35,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:35,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:35,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123699742] [2021-10-03 11:54:35,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 11:54:35,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:35,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 11:54:35,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-03 11:54:35,685 INFO L87 Difference]: Start difference. First operand 54 states and 125 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:35,728 INFO L93 Difference]: Finished difference Result 74 states and 159 transitions. [2021-10-03 11:54:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 11:54:35,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:35,730 INFO L225 Difference]: With dead ends: 74 [2021-10-03 11:54:35,730 INFO L226 Difference]: Without dead ends: 74 [2021-10-03 11:54:35,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:54:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-03 11:54:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2021-10-03 11:54:35,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 125 transitions. [2021-10-03 11:54:35,734 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 125 transitions. Word has length 14 [2021-10-03 11:54:35,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:35,735 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 125 transitions. [2021-10-03 11:54:35,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 125 transitions. [2021-10-03 11:54:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:35,736 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:35,736 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:35,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-03 11:54:35,737 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:35,737 INFO L82 PathProgramCache]: Analyzing trace with hash -650855896, now seen corresponding path program 6 times [2021-10-03 11:54:35,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:35,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999842282] [2021-10-03 11:54:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:35,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:35,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:35,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999842282] [2021-10-03 11:54:35,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999842282] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:35,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:35,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:35,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569872462] [2021-10-03 11:54:35,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 11:54:35,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:35,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 11:54:35,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-03 11:54:35,769 INFO L87 Difference]: Start difference. First operand 54 states and 125 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:35,827 INFO L93 Difference]: Finished difference Result 72 states and 156 transitions. [2021-10-03 11:54:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-03 11:54:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:35,829 INFO L225 Difference]: With dead ends: 72 [2021-10-03 11:54:35,829 INFO L226 Difference]: Without dead ends: 70 [2021-10-03 11:54:35,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:54:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-03 11:54:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2021-10-03 11:54:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3207547169811322) internal successors, (123), 53 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 123 transitions. [2021-10-03 11:54:35,833 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 123 transitions. Word has length 14 [2021-10-03 11:54:35,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:35,833 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 123 transitions. [2021-10-03 11:54:35,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 123 transitions. [2021-10-03 11:54:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:35,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:35,835 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:35,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-03 11:54:35,835 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:35,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:35,836 INFO L82 PathProgramCache]: Analyzing trace with hash 345028617, now seen corresponding path program 6 times [2021-10-03 11:54:35,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:35,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209041491] [2021-10-03 11:54:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:35,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:35,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:35,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209041491] [2021-10-03 11:54:35,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209041491] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:35,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:35,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-03 11:54:35,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662694641] [2021-10-03 11:54:35,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 11:54:35,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:35,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 11:54:35,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-03 11:54:35,876 INFO L87 Difference]: Start difference. First operand 54 states and 123 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:35,919 INFO L93 Difference]: Finished difference Result 70 states and 146 transitions. [2021-10-03 11:54:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 11:54:35,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:35,921 INFO L225 Difference]: With dead ends: 70 [2021-10-03 11:54:35,921 INFO L226 Difference]: Without dead ends: 66 [2021-10-03 11:54:35,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:54:35,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-03 11:54:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2021-10-03 11:54:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.2745098039215685) internal successors, (116), 51 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 116 transitions. [2021-10-03 11:54:35,925 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 116 transitions. Word has length 14 [2021-10-03 11:54:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:35,925 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 116 transitions. [2021-10-03 11:54:35,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 116 transitions. [2021-10-03 11:54:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 11:54:35,927 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:35,927 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:35,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-03 11:54:35,927 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:35,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1696644032, now seen corresponding path program 1 times [2021-10-03 11:54:35,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:35,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809710883] [2021-10-03 11:54:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:35,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:36,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:36,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809710883] [2021-10-03 11:54:36,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809710883] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:36,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15334800] [2021-10-03 11:54:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:36,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:36,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:36,032 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) [2021-10-03 11:54:36,050 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 [2021-10-03 11:54:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:36,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-03 11:54:36,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:36,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15334800] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:36,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:36,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-03 11:54:36,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494326894] [2021-10-03 11:54:36,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 11:54:36,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:36,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 11:54:36,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-03 11:54:36,322 INFO L87 Difference]: Start difference. First operand 52 states and 116 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-10-03 11:54:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:36,435 INFO L93 Difference]: Finished difference Result 65 states and 138 transitions. [2021-10-03 11:54:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 11:54:36,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 15 [2021-10-03 11:54:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:36,436 INFO L225 Difference]: With dead ends: 65 [2021-10-03 11:54:36,436 INFO L226 Difference]: Without dead ends: 42 [2021-10-03 11:54:36,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-10-03 11:54:36,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-03 11:54:36,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-03 11:54:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 90 transitions. [2021-10-03 11:54:36,440 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 90 transitions. Word has length 15 [2021-10-03 11:54:36,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:36,440 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 90 transitions. [2021-10-03 11:54:36,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-10-03 11:54:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 90 transitions. [2021-10-03 11:54:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 11:54:36,441 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:36,442 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:36,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-03 11:54:36,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:36,652 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash -936798474, now seen corresponding path program 2 times [2021-10-03 11:54:36,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:36,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619414575] [2021-10-03 11:54:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:36,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:36,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:36,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619414575] [2021-10-03 11:54:36,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619414575] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:36,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228674558] [2021-10-03 11:54:36,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:54:36,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:36,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:36,759 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) [2021-10-03 11:54:36,784 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 [2021-10-03 11:54:36,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 11:54:36,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:36,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-03 11:54:36,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:37,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228674558] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:37,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:37,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-03 11:54:37,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267205363] [2021-10-03 11:54:37,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 11:54:37,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:37,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 11:54:37,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-03 11:54:37,072 INFO L87 Difference]: Start difference. First operand 42 states and 90 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-10-03 11:54:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:37,203 INFO L93 Difference]: Finished difference Result 53 states and 113 transitions. [2021-10-03 11:54:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 11:54:37,204 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 15 [2021-10-03 11:54:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:37,205 INFO L225 Difference]: With dead ends: 53 [2021-10-03 11:54:37,205 INFO L226 Difference]: Without dead ends: 46 [2021-10-03 11:54:37,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-03 11:54:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-03 11:54:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-10-03 11:54:37,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.255813953488372) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 97 transitions. [2021-10-03 11:54:37,208 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 97 transitions. Word has length 15 [2021-10-03 11:54:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:37,208 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 97 transitions. [2021-10-03 11:54:37,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-10-03 11:54:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 97 transitions. [2021-10-03 11:54:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 11:54:37,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:37,210 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:37,249 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 [2021-10-03 11:54:37,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:37,411 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:37,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash -770564694, now seen corresponding path program 3 times [2021-10-03 11:54:37,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:37,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830779176] [2021-10-03 11:54:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:37,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:37,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:37,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830779176] [2021-10-03 11:54:37,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830779176] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:37,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061594943] [2021-10-03 11:54:37,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 11:54:37,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:37,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:37,532 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) [2021-10-03 11:54:37,534 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 [2021-10-03 11:54:37,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 11:54:37,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:37,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-03 11:54:37,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:37,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061594943] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:37,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:37,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-03 11:54:37,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657576984] [2021-10-03 11:54:37,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 11:54:37,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 11:54:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-03 11:54:37,809 INFO L87 Difference]: Start difference. First operand 44 states and 97 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-10-03 11:54:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:37,940 INFO L93 Difference]: Finished difference Result 55 states and 113 transitions. [2021-10-03 11:54:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 11:54:37,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 15 [2021-10-03 11:54:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:37,941 INFO L225 Difference]: With dead ends: 55 [2021-10-03 11:54:37,941 INFO L226 Difference]: Without dead ends: 36 [2021-10-03 11:54:37,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-03 11:54:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-03 11:54:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-03 11:54:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 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) [2021-10-03 11:54:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-10-03 11:54:37,946 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 15 [2021-10-03 11:54:37,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:37,946 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-10-03 11:54:37,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-10-03 11:54:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-10-03 11:54:37,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 11:54:37,947 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:37,947 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:37,978 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 [2021-10-03 11:54:38,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:38,158 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:38,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:38,159 INFO L82 PathProgramCache]: Analyzing trace with hash 474637232, now seen corresponding path program 4 times [2021-10-03 11:54:38,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:38,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356470891] [2021-10-03 11:54:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:38,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:38,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:38,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356470891] [2021-10-03 11:54:38,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356470891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:38,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062282791] [2021-10-03 11:54:38,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 11:54:38,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:38,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:38,250 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) [2021-10-03 11:54:38,268 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 [2021-10-03 11:54:38,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 11:54:38,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:38,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-03 11:54:38,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:38,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062282791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:38,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:38,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-03 11:54:38,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451125011] [2021-10-03 11:54:38,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 11:54:38,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:38,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 11:54:38,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-03 11:54:38,553 INFO L87 Difference]: Start difference. First operand 36 states and 68 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-10-03 11:54:38,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:38,693 INFO L93 Difference]: Finished difference Result 53 states and 101 transitions. [2021-10-03 11:54:38,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 11:54:38,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 15 [2021-10-03 11:54:38,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:38,695 INFO L225 Difference]: With dead ends: 53 [2021-10-03 11:54:38,695 INFO L226 Difference]: Without dead ends: 46 [2021-10-03 11:54:38,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-03 11:54:38,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-03 11:54:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2021-10-03 11:54:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 83 transitions. [2021-10-03 11:54:38,698 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 83 transitions. Word has length 15 [2021-10-03 11:54:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:38,698 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 83 transitions. [2021-10-03 11:54:38,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-10-03 11:54:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 83 transitions. [2021-10-03 11:54:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 11:54:38,700 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:38,700 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:38,726 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 [2021-10-03 11:54:38,914 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,SelfDestructingSolverStorable21 [2021-10-03 11:54:38,915 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:38,917 INFO L82 PathProgramCache]: Analyzing trace with hash 640871012, now seen corresponding path program 5 times [2021-10-03 11:54:38,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:38,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800046300] [2021-10-03 11:54:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:38,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:39,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:39,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800046300] [2021-10-03 11:54:39,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800046300] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:39,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372381176] [2021-10-03 11:54:39,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 11:54:39,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:39,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:39,009 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) [2021-10-03 11:54:39,041 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 [2021-10-03 11:54:39,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 11:54:39,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:39,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-03 11:54:39,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:39,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372381176] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:39,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:39,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-10-03 11:54:39,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054772176] [2021-10-03 11:54:39,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-03 11:54:39,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:39,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-03 11:54:39,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-03 11:54:39,289 INFO L87 Difference]: Start difference. First operand 42 states and 83 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2021-10-03 11:54:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:39,439 INFO L93 Difference]: Finished difference Result 47 states and 87 transitions. [2021-10-03 11:54:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-03 11:54:39,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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 15 [2021-10-03 11:54:39,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:39,441 INFO L225 Difference]: With dead ends: 47 [2021-10-03 11:54:39,441 INFO L226 Difference]: Without dead ends: 36 [2021-10-03 11:54:39,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-10-03 11:54:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-03 11:54:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-03 11:54:39,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-10-03 11:54:39,444 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 15 [2021-10-03 11:54:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:39,444 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-10-03 11:54:39,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2021-10-03 11:54:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-10-03 11:54:39,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 11:54:39,445 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:39,445 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:39,484 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 [2021-10-03 11:54:39,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:39,652 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:39,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1335295700, now seen corresponding path program 6 times [2021-10-03 11:54:39,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:39,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231206673] [2021-10-03 11:54:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:39,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:39,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:39,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231206673] [2021-10-03 11:54:39,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231206673] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:39,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67679472] [2021-10-03 11:54:39,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 11:54:39,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:39,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:39,749 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) [2021-10-03 11:54:39,773 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 [2021-10-03 11:54:39,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-03 11:54:39,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:39,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-03 11:54:39,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:40,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67679472] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:40,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:40,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-03 11:54:40,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055664901] [2021-10-03 11:54:40,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 11:54:40,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:40,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 11:54:40,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-03 11:54:40,042 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-10-03 11:54:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:40,141 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2021-10-03 11:54:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 11:54:40,142 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 15 [2021-10-03 11:54:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:40,142 INFO L225 Difference]: With dead ends: 45 [2021-10-03 11:54:40,143 INFO L226 Difference]: Without dead ends: 36 [2021-10-03 11:54:40,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-03 11:54:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-03 11:54:40,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-10-03 11:54:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 62 transitions. [2021-10-03 11:54:40,146 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 62 transitions. Word has length 15 [2021-10-03 11:54:40,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:40,146 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 62 transitions. [2021-10-03 11:54:40,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-10-03 11:54:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 62 transitions. [2021-10-03 11:54:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 11:54:40,147 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:40,148 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:40,177 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 [2021-10-03 11:54:40,348 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,SelfDestructingSolverStorable23 [2021-10-03 11:54:40,349 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:40,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:40,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1763600356, now seen corresponding path program 7 times [2021-10-03 11:54:40,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:40,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272761609] [2021-10-03 11:54:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:40,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:40,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:40,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272761609] [2021-10-03 11:54:40,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272761609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:40,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842535702] [2021-10-03 11:54:40,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 11:54:40,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:40,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:40,475 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) [2021-10-03 11:54:40,498 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 [2021-10-03 11:54:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:40,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-03 11:54:40,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:40,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842535702] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:40,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:40,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-03 11:54:40,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133099376] [2021-10-03 11:54:40,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 11:54:40,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:40,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 11:54:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-03 11:54:40,794 INFO L87 Difference]: Start difference. First operand 34 states and 62 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2021-10-03 11:54:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:40,868 INFO L93 Difference]: Finished difference Result 45 states and 77 transitions. [2021-10-03 11:54:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 11:54:40,869 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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 15 [2021-10-03 11:54:40,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:40,869 INFO L225 Difference]: With dead ends: 45 [2021-10-03 11:54:40,870 INFO L226 Difference]: Without dead ends: 32 [2021-10-03 11:54:40,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-10-03 11:54:40,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-03 11:54:40,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-10-03 11:54:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 50 transitions. [2021-10-03 11:54:40,872 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 50 transitions. Word has length 15 [2021-10-03 11:54:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:40,872 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 50 transitions. [2021-10-03 11:54:40,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2021-10-03 11:54:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 50 transitions. [2021-10-03 11:54:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 11:54:40,872 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:40,873 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:40,898 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 [2021-10-03 11:54:41,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:41,074 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:41,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1726010550, now seen corresponding path program 8 times [2021-10-03 11:54:41,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:41,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681301778] [2021-10-03 11:54:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:41,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:41,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:41,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681301778] [2021-10-03 11:54:41,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681301778] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:41,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385659479] [2021-10-03 11:54:41,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:54:41,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:41,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:41,196 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) [2021-10-03 11:54:41,214 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 [2021-10-03 11:54:41,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 11:54:41,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:41,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-03 11:54:41,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:41,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385659479] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:41,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:41,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-03 11:54:41,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824532984] [2021-10-03 11:54:41,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 11:54:41,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:41,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 11:54:41,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-03 11:54:41,534 INFO L87 Difference]: Start difference. First operand 30 states and 50 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2021-10-03 11:54:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:41,633 INFO L93 Difference]: Finished difference Result 33 states and 57 transitions. [2021-10-03 11:54:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 11:54:41,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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 15 [2021-10-03 11:54:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:41,635 INFO L225 Difference]: With dead ends: 33 [2021-10-03 11:54:41,635 INFO L226 Difference]: Without dead ends: 0 [2021-10-03 11:54:41,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-03 11:54:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-03 11:54:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-03 11:54:41,636 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) [2021-10-03 11:54:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-03 11:54:41,636 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-10-03 11:54:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:41,636 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-03 11:54:41,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2021-10-03 11:54:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-03 11:54:41,637 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-03 11:54:41,639 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-03 11:54:41,640 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-03 11:54:41,640 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-03 11:54:41,663 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 [2021-10-03 11:54:41,848 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,SelfDestructingSolverStorable25 [2021-10-03 11:54:41,854 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-03 11:54:41,854 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-03 11:54:41,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 11:54:41 BasicIcfg [2021-10-03 11:54:41,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-03 11:54:41,857 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-03 11:54:41,857 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-03 11:54:41,858 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-03 11:54:41,858 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 11:54:29" (3/4) ... [2021-10-03 11:54:41,862 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-03 11:54:41,870 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-03 11:54:41,870 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-03 11:54:41,875 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-03 11:54:41,875 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-03 11:54:41,875 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-03 11:54:41,919 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-03 11:54:41,920 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-03 11:54:41,922 INFO L168 Benchmark]: Toolchain (without parser) took 13630.74 ms. Allocated memory was 56.6 MB in the beginning and 100.7 MB in the end (delta: 44.0 MB). Free memory was 33.4 MB in the beginning and 45.3 MB in the end (delta: -12.0 MB). Peak memory consumption was 35.0 MB. Max. memory is 16.1 GB. [2021-10-03 11:54:41,922 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 44.0 MB. Free memory was 27.3 MB in the beginning and 27.3 MB in the end (delta: 33.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 11:54:41,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.56 ms. Allocated memory is still 56.6 MB. Free memory was 33.0 MB in the beginning and 36.7 MB in the end (delta: -3.7 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-10-03 11:54:41,923 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.04 ms. Allocated memory is still 56.6 MB. Free memory was 36.7 MB in the beginning and 35.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-03 11:54:41,924 INFO L168 Benchmark]: Boogie Preprocessor took 28.86 ms. Allocated memory is still 56.6 MB. Free memory was 35.2 MB in the beginning and 34.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 11:54:41,924 INFO L168 Benchmark]: RCFGBuilder took 463.00 ms. Allocated memory is still 56.6 MB. Free memory was 34.2 MB in the beginning and 38.8 MB in the end (delta: -4.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-03 11:54:41,925 INFO L168 Benchmark]: TraceAbstraction took 12711.70 ms. Allocated memory was 56.6 MB in the beginning and 100.7 MB in the end (delta: 44.0 MB). Free memory was 38.4 MB in the beginning and 47.4 MB in the end (delta: -9.1 MB). Peak memory consumption was 36.0 MB. Max. memory is 16.1 GB. [2021-10-03 11:54:41,925 INFO L168 Benchmark]: Witness Printer took 62.49 ms. Allocated memory is still 100.7 MB. Free memory was 47.4 MB in the beginning and 45.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-03 11:54:41,928 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 44.0 MB. Free memory was 27.3 MB in the beginning and 27.3 MB in the end (delta: 33.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.56 ms. Allocated memory is still 56.6 MB. Free memory was 33.0 MB in the beginning and 36.7 MB in the end (delta: -3.7 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.04 ms. Allocated memory is still 56.6 MB. Free memory was 36.7 MB in the beginning and 35.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.86 ms. Allocated memory is still 56.6 MB. Free memory was 35.2 MB in the beginning and 34.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 463.00 ms. Allocated memory is still 56.6 MB. Free memory was 34.2 MB in the beginning and 38.8 MB in the end (delta: -4.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12711.70 ms. Allocated memory was 56.6 MB in the beginning and 100.7 MB in the end (delta: 44.0 MB). Free memory was 38.4 MB in the beginning and 47.4 MB in the end (delta: -9.1 MB). Peak memory consumption was 36.0 MB. Max. memory is 16.1 GB. * Witness Printer took 62.49 ms. Allocated memory is still 100.7 MB. Free memory was 47.4 MB in the beginning and 45.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1786.0ms, 71 PlacesBefore, 23 PlacesAfterwards, 70 TransitionsBefore, 18 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 5 FixpointIterations, 33 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 61 TotalNumberOfCompositions, 494 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 494, positive: 494, positive conditional: 0, positive unconditional: 494, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 338, positive: 338, positive conditional: 0, positive unconditional: 338, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 338, positive: 336, positive conditional: 0, positive unconditional: 336, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 8, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 494, positive: 156, positive conditional: 0, positive unconditional: 156, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 338, unknown conditional: 0, unknown unconditional: 338] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - 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: 50]: 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 5 procedures, 85 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 12490.4ms, OverallIterations: 26, TraceHistogramMax: 1, EmptinessCheckTime: 42.0ms, AutomataDifference: 2304.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1846.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 593 SDtfs, 608 SDslu, 1673 SDs, 0 SdLazy, 1795 SolverSat, 130 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1084.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 400 GetRequests, 150 SyntacticMatches, 20 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1765.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=5, InterpolantAutomatonStates: 189, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 184.5ms AutomataMinimizationTime, 26 MinimizatonAttempts, 302 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 125.9ms SsaConstructionTime, 596.8ms SatisfiabilityAnalysisTime, 3565.6ms InterpolantComputationTime, 542 NumberOfCodeBlocks, 542 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 504 ConstructedInterpolants, 0 QuantifiedInterpolants, 2917 SizeOfPredicates, 27 NumberOfNonLiveVariables, 972 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 38 InterpolantComputations, 14 PerfectInterpolantSequences, 9/48 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! [2021-10-03 11:54:41,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...