./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test/easy11.wvr.c --full-output -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-NewStatesSleepPersistentFixedOrder-NoLbe-Lockstep.epf --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 cb808df5ede9a426482e39f96e2ad9376c481c3a -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-NewStatesSleepPersistentFixedOrder-NoLbe-Lockstep.epf .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 22:15:12,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 22:15:12,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 22:15:12,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 22:15:12,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 22:15:12,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 22:15:12,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 22:15:12,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 22:15:12,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 22:15:12,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 22:15:12,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 22:15:12,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 22:15:12,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 22:15:12,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 22:15:12,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 22:15:12,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 22:15:12,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 22:15:12,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 22:15:12,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 22:15:12,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 22:15:12,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 22:15:12,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 22:15:12,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 22:15:12,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 22:15:12,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 22:15:12,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 22:15:12,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 22:15:12,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 22:15:12,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 22:15:12,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 22:15:12,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 22:15:12,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 22:15:12,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 22:15:12,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 22:15:12,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 22:15:12,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 22:15:12,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 22:15:12,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 22:15:12,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 22:15:12,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 22:15:12,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 22:15:12,590 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 22:15:12,621 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 22:15:12,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 22:15:12,622 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 22:15:12,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 22:15:12,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 22:15:12,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 22:15:12,625 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 22:15:12,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 22:15:12,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 22:15:12,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 22:15:12,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 22:15:12,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 22:15:12,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 22:15:12,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 22:15:12,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 22:15:12,627 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 22:15:12,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 22:15:12,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 22:15:12,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 22:15:12,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 22:15:12,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 22:15:12,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 22:15:12,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 22:15:12,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 22:15:12,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 22:15:12,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 22:15:12,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 22:15:12,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 22:15:12,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 22:15:12,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 22:15:12,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb808df5ede9a426482e39f96e2ad9376c481c3a [2021-10-05 22:15:13,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 22:15:13,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 22:15:13,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 22:15:13,093 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 22:15:13,094 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 22:15:13,095 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test/easy11.wvr.c [2021-10-05 22:15:13,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e50f54a30/7b2abd199a6d4d8a819bf67f58de51c3/FLAG100441e6a [2021-10-05 22:15:13,746 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 22:15:13,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test/easy11.wvr.c [2021-10-05 22:15:13,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e50f54a30/7b2abd199a6d4d8a819bf67f58de51c3/FLAG100441e6a [2021-10-05 22:15:14,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e50f54a30/7b2abd199a6d4d8a819bf67f58de51c3 [2021-10-05 22:15:14,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 22:15:14,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 22:15:14,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 22:15:14,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 22:15:14,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 22:15:14,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:15:14" (1/1) ... [2021-10-05 22:15:14,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6c2a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:15:14, skipping insertion in model container [2021-10-05 22:15:14,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:15:14" (1/1) ... [2021-10-05 22:15:14,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 22:15:14,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 22:15:14,445 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[1843,1856] [2021-10-05 22:15:14,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 22:15:14,460 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 22:15:14,483 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[1843,1856] [2021-10-05 22:15:14,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 22:15:14,502 INFO L208 MainTranslator]: Completed translation [2021-10-05 22:15:14,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:15:14 WrapperNode [2021-10-05 22:15:14,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 22:15:14,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 22:15:14,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 22:15:14,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 22:15:14,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:15:14" (1/1) ... [2021-10-05 22:15:14,524 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:15:14" (1/1) ... [2021-10-05 22:15:14,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 22:15:14,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 22:15:14,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 22:15:14,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 22:15:14,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:15:14" (1/1) ... [2021-10-05 22:15:14,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:15:14" (1/1) ... [2021-10-05 22:15:14,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:15:14" (1/1) ... [2021-10-05 22:15:14,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:15:14" (1/1) ... [2021-10-05 22:15:14,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:15:14" (1/1) ... [2021-10-05 22:15:14,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:15:14" (1/1) ... [2021-10-05 22:15:14,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:15:14" (1/1) ... [2021-10-05 22:15:14,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 22:15:14,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 22:15:14,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 22:15:14,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 22:15:14,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:15:14" (1/1) ... [2021-10-05 22:15:14,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 22:15:14,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:14,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-05 22:15:14,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-05 22:15:14,744 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 22:15:14,744 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 22:15:14,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 22:15:14,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 22:15:14,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 22:15:14,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 22:15:14,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 22:15:14,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 22:15:14,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 22:15:14,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 22:15:14,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 22:15:14,750 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 22:15:15,147 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 22:15:15,148 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-05 22:15:15,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:15:15 BoogieIcfgContainer [2021-10-05 22:15:15,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 22:15:15,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 22:15:15,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 22:15:15,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 22:15:15,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 10:15:14" (1/3) ... [2021-10-05 22:15:15,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325515a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:15:15, skipping insertion in model container [2021-10-05 22:15:15,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:15:14" (2/3) ... [2021-10-05 22:15:15,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325515a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:15:15, skipping insertion in model container [2021-10-05 22:15:15,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:15:15" (3/3) ... [2021-10-05 22:15:15,160 INFO L111 eAbstractionObserver]: Analyzing ICFG easy11.wvr.c [2021-10-05 22:15:15,167 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 22:15:15,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 22:15:15,168 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 22:15:15,168 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 22:15:15,198 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,198 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,199 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,199 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,199 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,200 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,200 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,200 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,201 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,201 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,201 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,202 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,202 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,202 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,203 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,203 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,203 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,203 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,204 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,204 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,205 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,205 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,205 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,206 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,206 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,211 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,212 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,212 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,212 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,213 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,213 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,213 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,214 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,214 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,214 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,214 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,215 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,215 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,215 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,216 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,219 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,220 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,220 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,221 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,226 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,227 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,227 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,228 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:15:15,236 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-05 22:15:15,293 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 22:15:15,302 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-05 22:15:15,303 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-05 22:15:15,320 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 22:15:15,333 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 164 flow [2021-10-05 22:15:15,336 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 164 flow [2021-10-05 22:15:15,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 164 flow [2021-10-05 22:15:15,388 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2021-10-05 22:15:15,389 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-05 22:15:15,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 72 events. 6/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2021-10-05 22:15:15,397 INFO L116 LiptonReduction]: Number of co-enabled transitions 500 [2021-10-05 22:15:18,157 INFO L131 LiptonReduction]: Checked pairs total: 490 [2021-10-05 22:15:18,157 INFO L133 LiptonReduction]: Total number of compositions: 65 [2021-10-05 22:15:18,168 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-10-05 22:15:18,182 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) [2021-10-05 22:15:18,185 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) [2021-10-05 22:15:18,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 22:15:18,193 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:18,194 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:18,194 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:18,201 INFO L82 PathProgramCache]: Analyzing trace with hash -898410522, now seen corresponding path program 1 times [2021-10-05 22:15:18,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:18,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565486945] [2021-10-05 22:15:18,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:18,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:18,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:18,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565486945] [2021-10-05 22:15:18,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565486945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:18,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:18,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:18,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628566894] [2021-10-05 22:15:18,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:15:18,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:15:18,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:15:18,611 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) [2021-10-05 22:15:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:18,714 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2021-10-05 22:15:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:15:18,716 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 [2021-10-05 22:15:18,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:18,727 INFO L225 Difference]: With dead ends: 43 [2021-10-05 22:15:18,727 INFO L226 Difference]: Without dead ends: 38 [2021-10-05 22:15:18,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-05 22:15:18,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-05 22:15:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-05 22:15:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 80 transitions. [2021-10-05 22:15:18,770 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 80 transitions. Word has length 13 [2021-10-05 22:15:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:18,771 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 80 transitions. [2021-10-05 22:15:18,771 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) [2021-10-05 22:15:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 80 transitions. [2021-10-05 22:15:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 22:15:18,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:18,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:18,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 22:15:18,774 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:18,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1964909294, now seen corresponding path program 2 times [2021-10-05 22:15:18,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:18,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674359367] [2021-10-05 22:15:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:18,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:18,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:18,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674359367] [2021-10-05 22:15:18,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674359367] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:18,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:18,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:18,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128105655] [2021-10-05 22:15:18,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:15:18,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:18,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:15:18,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:15:18,989 INFO L87 Difference]: Start difference. First operand 38 states and 80 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) [2021-10-05 22:15:19,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:19,093 INFO L93 Difference]: Finished difference Result 49 states and 104 transitions. [2021-10-05 22:15:19,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:15:19,094 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 [2021-10-05 22:15:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:19,098 INFO L225 Difference]: With dead ends: 49 [2021-10-05 22:15:19,099 INFO L226 Difference]: Without dead ends: 44 [2021-10-05 22:15:19,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-05 22:15:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-05 22:15:19,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-10-05 22:15:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 89 transitions. [2021-10-05 22:15:19,113 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 89 transitions. Word has length 13 [2021-10-05 22:15:19,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:19,115 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 89 transitions. [2021-10-05 22:15:19,115 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) [2021-10-05 22:15:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 89 transitions. [2021-10-05 22:15:19,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 22:15:19,117 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:19,117 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:19,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 22:15:19,118 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:19,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:19,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1776591734, now seen corresponding path program 3 times [2021-10-05 22:15:19,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:19,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533238688] [2021-10-05 22:15:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:19,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:19,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:19,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533238688] [2021-10-05 22:15:19,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533238688] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:19,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:19,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:19,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660501146] [2021-10-05 22:15:19,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:15:19,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:19,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:15:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:15:19,246 INFO L87 Difference]: Start difference. First operand 40 states and 89 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) [2021-10-05 22:15:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:19,329 INFO L93 Difference]: Finished difference Result 47 states and 98 transitions. [2021-10-05 22:15:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:15:19,330 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 [2021-10-05 22:15:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:19,331 INFO L225 Difference]: With dead ends: 47 [2021-10-05 22:15:19,331 INFO L226 Difference]: Without dead ends: 42 [2021-10-05 22:15:19,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-05 22:15:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-05 22:15:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-05 22:15:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 92 transitions. [2021-10-05 22:15:19,339 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 92 transitions. Word has length 13 [2021-10-05 22:15:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:19,340 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 92 transitions. [2021-10-05 22:15:19,340 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) [2021-10-05 22:15:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 92 transitions. [2021-10-05 22:15:19,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 22:15:19,342 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:19,342 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:19,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-05 22:15:19,343 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:19,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1690327918, now seen corresponding path program 4 times [2021-10-05 22:15:19,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:19,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201626755] [2021-10-05 22:15:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:19,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:19,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:19,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201626755] [2021-10-05 22:15:19,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201626755] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:19,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:19,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:19,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777254534] [2021-10-05 22:15:19,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:15:19,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:19,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:15:19,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:15:19,497 INFO L87 Difference]: Start difference. First operand 42 states and 92 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) [2021-10-05 22:15:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:19,593 INFO L93 Difference]: Finished difference Result 53 states and 116 transitions. [2021-10-05 22:15:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:15:19,593 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 [2021-10-05 22:15:19,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:19,596 INFO L225 Difference]: With dead ends: 53 [2021-10-05 22:15:19,597 INFO L226 Difference]: Without dead ends: 48 [2021-10-05 22:15:19,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-05 22:15:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-05 22:15:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-10-05 22:15:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 43 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 101 transitions. [2021-10-05 22:15:19,609 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 101 transitions. Word has length 13 [2021-10-05 22:15:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:19,610 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 101 transitions. [2021-10-05 22:15:19,610 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) [2021-10-05 22:15:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 101 transitions. [2021-10-05 22:15:19,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 22:15:19,612 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:19,612 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:19,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-05 22:15:19,613 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:19,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:19,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1502010358, now seen corresponding path program 5 times [2021-10-05 22:15:19,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:19,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038162349] [2021-10-05 22:15:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:19,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:19,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:19,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038162349] [2021-10-05 22:15:19,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038162349] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:19,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:19,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:19,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096922170] [2021-10-05 22:15:19,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:15:19,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:19,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:15:19,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:15:19,714 INFO L87 Difference]: Start difference. First operand 44 states and 101 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) [2021-10-05 22:15:19,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:19,807 INFO L93 Difference]: Finished difference Result 51 states and 110 transitions. [2021-10-05 22:15:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:15:19,807 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 [2021-10-05 22:15:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:19,809 INFO L225 Difference]: With dead ends: 51 [2021-10-05 22:15:19,809 INFO L226 Difference]: Without dead ends: 46 [2021-10-05 22:15:19,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-05 22:15:19,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-05 22:15:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2021-10-05 22:15:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 92 transitions. [2021-10-05 22:15:19,815 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 92 transitions. Word has length 13 [2021-10-05 22:15:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:19,815 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 92 transitions. [2021-10-05 22:15:19,816 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) [2021-10-05 22:15:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 92 transitions. [2021-10-05 22:15:19,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 22:15:19,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:19,817 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:19,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-05 22:15:19,818 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:19,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:19,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1077586462, now seen corresponding path program 6 times [2021-10-05 22:15:19,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:19,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776056638] [2021-10-05 22:15:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:19,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:19,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:19,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776056638] [2021-10-05 22:15:19,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776056638] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:19,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:19,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:19,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836173497] [2021-10-05 22:15:19,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:15:19,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:19,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:15:19,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:15:19,918 INFO L87 Difference]: Start difference. First operand 42 states and 92 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) [2021-10-05 22:15:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:19,992 INFO L93 Difference]: Finished difference Result 49 states and 101 transitions. [2021-10-05 22:15:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:15:19,993 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 [2021-10-05 22:15:19,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:19,994 INFO L225 Difference]: With dead ends: 49 [2021-10-05 22:15:19,994 INFO L226 Difference]: Without dead ends: 44 [2021-10-05 22:15:19,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-05 22:15:19,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-05 22:15:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-10-05 22:15:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 92 transitions. [2021-10-05 22:15:19,999 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 92 transitions. Word has length 13 [2021-10-05 22:15:19,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:20,000 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 92 transitions. [2021-10-05 22:15:20,000 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) [2021-10-05 22:15:20,000 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 92 transitions. [2021-10-05 22:15:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:15:20,001 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:20,001 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:20,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-05 22:15:20,002 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:20,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2080948965, now seen corresponding path program 1 times [2021-10-05 22:15:20,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:20,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21374043] [2021-10-05 22:15:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:20,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:20,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:20,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21374043] [2021-10-05 22:15:20,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21374043] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:20,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:20,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:20,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558576902] [2021-10-05 22:15:20,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 22:15:20,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:20,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 22:15:20,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:15:20,044 INFO L87 Difference]: Start difference. First operand 42 states and 92 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) [2021-10-05 22:15:20,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:20,099 INFO L93 Difference]: Finished difference Result 78 states and 166 transitions. [2021-10-05 22:15:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:15:20,101 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 [2021-10-05 22:15:20,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:20,105 INFO L225 Difference]: With dead ends: 78 [2021-10-05 22:15:20,106 INFO L226 Difference]: Without dead ends: 68 [2021-10-05 22:15:20,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-05 22:15:20,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-05 22:15:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2021-10-05 22:15:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 45 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 101 transitions. [2021-10-05 22:15:20,113 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 101 transitions. Word has length 14 [2021-10-05 22:15:20,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:20,113 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 101 transitions. [2021-10-05 22:15:20,114 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) [2021-10-05 22:15:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 101 transitions. [2021-10-05 22:15:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:15:20,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:20,115 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:20,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-05 22:15:20,116 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:20,117 INFO L82 PathProgramCache]: Analyzing trace with hash 782619411, now seen corresponding path program 2 times [2021-10-05 22:15:20,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:20,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965796142] [2021-10-05 22:15:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:20,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:20,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:20,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965796142] [2021-10-05 22:15:20,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965796142] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:20,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:20,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:20,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464348012] [2021-10-05 22:15:20,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 22:15:20,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 22:15:20,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:15:20,171 INFO L87 Difference]: Start difference. First operand 46 states and 101 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) [2021-10-05 22:15:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:20,246 INFO L93 Difference]: Finished difference Result 98 states and 201 transitions. [2021-10-05 22:15:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 22:15:20,246 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 [2021-10-05 22:15:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:20,248 INFO L225 Difference]: With dead ends: 98 [2021-10-05 22:15:20,248 INFO L226 Difference]: Without dead ends: 94 [2021-10-05 22:15:20,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-05 22:15:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-05 22:15:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2021-10-05 22:15:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.339622641509434) internal successors, (124), 53 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) [2021-10-05 22:15:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 124 transitions. [2021-10-05 22:15:20,256 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 124 transitions. Word has length 14 [2021-10-05 22:15:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:20,256 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 124 transitions. [2021-10-05 22:15:20,257 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) [2021-10-05 22:15:20,257 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 124 transitions. [2021-10-05 22:15:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:15:20,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:20,258 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:20,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-05 22:15:20,259 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:20,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1759761863, now seen corresponding path program 3 times [2021-10-05 22:15:20,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:20,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489717266] [2021-10-05 22:15:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:20,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:20,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:20,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489717266] [2021-10-05 22:15:20,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489717266] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:20,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:20,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:20,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375540243] [2021-10-05 22:15:20,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 22:15:20,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 22:15:20,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:15:20,302 INFO L87 Difference]: Start difference. First operand 54 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) [2021-10-05 22:15:20,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:20,347 INFO L93 Difference]: Finished difference Result 76 states and 170 transitions. [2021-10-05 22:15:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 22:15:20,349 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 [2021-10-05 22:15:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:20,352 INFO L225 Difference]: With dead ends: 76 [2021-10-05 22:15:20,352 INFO L226 Difference]: Without dead ends: 76 [2021-10-05 22:15:20,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:15:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-05 22:15:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 48. [2021-10-05 22:15:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 108 transitions. [2021-10-05 22:15:20,361 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 108 transitions. Word has length 14 [2021-10-05 22:15:20,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:20,366 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 108 transitions. [2021-10-05 22:15:20,366 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) [2021-10-05 22:15:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 108 transitions. [2021-10-05 22:15:20,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:15:20,367 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:20,368 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:20,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-05 22:15:20,368 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:20,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:20,369 INFO L82 PathProgramCache]: Analyzing trace with hash -433190913, now seen corresponding path program 1 times [2021-10-05 22:15:20,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:20,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818130887] [2021-10-05 22:15:20,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:20,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:20,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:20,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818130887] [2021-10-05 22:15:20,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818130887] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:20,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:20,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:20,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020018051] [2021-10-05 22:15:20,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 22:15:20,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:20,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 22:15:20,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:15:20,445 INFO L87 Difference]: Start difference. First operand 48 states and 108 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) [2021-10-05 22:15:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:20,495 INFO L93 Difference]: Finished difference Result 72 states and 160 transitions. [2021-10-05 22:15:20,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-05 22:15:20,500 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 [2021-10-05 22:15:20,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:20,503 INFO L225 Difference]: With dead ends: 72 [2021-10-05 22:15:20,503 INFO L226 Difference]: Without dead ends: 70 [2021-10-05 22:15:20,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-05 22:15:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-05 22:15:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2021-10-05 22:15:20,517 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) [2021-10-05 22:15:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 132 transitions. [2021-10-05 22:15:20,522 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 132 transitions. Word has length 14 [2021-10-05 22:15:20,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:20,522 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 132 transitions. [2021-10-05 22:15:20,523 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) [2021-10-05 22:15:20,523 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 132 transitions. [2021-10-05 22:15:20,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:15:20,525 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:20,525 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:20,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-05 22:15:20,526 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:20,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1965000997, now seen corresponding path program 2 times [2021-10-05 22:15:20,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:20,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352388090] [2021-10-05 22:15:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:20,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:20,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:20,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352388090] [2021-10-05 22:15:20,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352388090] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:20,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995783663] [2021-10-05 22:15:20,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:15:20,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:20,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:20,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:15:20,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-05 22:15:20,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:15:20,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:15:20,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-05 22:15:20,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:15:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:20,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995783663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:20,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:15:20,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-05 22:15:20,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623978728] [2021-10-05 22:15:20,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 22:15:20,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:20,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 22:15:20,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:15:20,758 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) [2021-10-05 22:15:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:20,813 INFO L93 Difference]: Finished difference Result 62 states and 141 transitions. [2021-10-05 22:15:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 22:15:20,814 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 [2021-10-05 22:15:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:20,815 INFO L225 Difference]: With dead ends: 62 [2021-10-05 22:15:20,815 INFO L226 Difference]: Without dead ends: 62 [2021-10-05 22:15:20,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:15:20,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-05 22:15:20,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2021-10-05 22:15:20,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.3529411764705883) internal successors, (120), 51 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:20,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 120 transitions. [2021-10-05 22:15:20,821 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 120 transitions. Word has length 14 [2021-10-05 22:15:20,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:20,822 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 120 transitions. [2021-10-05 22:15:20,822 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) [2021-10-05 22:15:20,822 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 120 transitions. [2021-10-05 22:15:20,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:15:20,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:20,824 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:20,876 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 [2021-10-05 22:15:21,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:21,040 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:21,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:21,041 INFO L82 PathProgramCache]: Analyzing trace with hash 860531347, now seen corresponding path program 4 times [2021-10-05 22:15:21,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:21,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518374268] [2021-10-05 22:15:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:21,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:21,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:21,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518374268] [2021-10-05 22:15:21,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518374268] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:21,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:21,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:21,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841221762] [2021-10-05 22:15:21,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 22:15:21,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:21,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 22:15:21,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:15:21,081 INFO L87 Difference]: Start difference. First operand 52 states and 120 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) [2021-10-05 22:15:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:21,131 INFO L93 Difference]: Finished difference Result 72 states and 152 transitions. [2021-10-05 22:15:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-05 22:15:21,132 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 [2021-10-05 22:15:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:21,133 INFO L225 Difference]: With dead ends: 72 [2021-10-05 22:15:21,133 INFO L226 Difference]: Without dead ends: 68 [2021-10-05 22:15:21,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-05 22:15:21,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-05 22:15:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-10-05 22:15:21,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3508771929824563) internal successors, (134), 57 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) [2021-10-05 22:15:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 134 transitions. [2021-10-05 22:15:21,139 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 134 transitions. Word has length 14 [2021-10-05 22:15:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:21,139 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 134 transitions. [2021-10-05 22:15:21,139 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) [2021-10-05 22:15:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 134 transitions. [2021-10-05 22:15:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:15:21,140 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:21,141 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:21,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-05 22:15:21,141 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:21,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:21,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1837673799, now seen corresponding path program 5 times [2021-10-05 22:15:21,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:21,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232573148] [2021-10-05 22:15:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:21,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:21,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:21,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232573148] [2021-10-05 22:15:21,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232573148] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:21,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:21,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:21,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851788121] [2021-10-05 22:15:21,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 22:15:21,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:21,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 22:15:21,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:15:21,184 INFO L87 Difference]: Start difference. First operand 58 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) [2021-10-05 22:15:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:21,225 INFO L93 Difference]: Finished difference Result 58 states and 131 transitions. [2021-10-05 22:15:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 22:15:21,226 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 [2021-10-05 22:15:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:21,227 INFO L225 Difference]: With dead ends: 58 [2021-10-05 22:15:21,227 INFO L226 Difference]: Without dead ends: 58 [2021-10-05 22:15:21,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:15:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-05 22:15:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2021-10-05 22:15:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 111 transitions. [2021-10-05 22:15:21,232 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 111 transitions. Word has length 14 [2021-10-05 22:15:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:21,232 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 111 transitions. [2021-10-05 22:15:21,232 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) [2021-10-05 22:15:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 111 transitions. [2021-10-05 22:15:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:15:21,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:21,234 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:21,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-05 22:15:21,234 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:21,235 INFO L82 PathProgramCache]: Analyzing trace with hash -355278977, now seen corresponding path program 3 times [2021-10-05 22:15:21,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:21,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263100199] [2021-10-05 22:15:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:21,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:21,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:21,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263100199] [2021-10-05 22:15:21,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263100199] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:21,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:21,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:21,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033143930] [2021-10-05 22:15:21,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 22:15:21,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:21,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 22:15:21,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:15:21,272 INFO L87 Difference]: Start difference. First operand 50 states and 111 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) [2021-10-05 22:15:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:21,338 INFO L93 Difference]: Finished difference Result 86 states and 181 transitions. [2021-10-05 22:15:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 22:15:21,338 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 [2021-10-05 22:15:21,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:21,339 INFO L225 Difference]: With dead ends: 86 [2021-10-05 22:15:21,340 INFO L226 Difference]: Without dead ends: 84 [2021-10-05 22:15:21,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-05 22:15:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-05 22:15:21,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2021-10-05 22:15:21,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 135 transitions. [2021-10-05 22:15:21,345 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 135 transitions. Word has length 14 [2021-10-05 22:15:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:21,345 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 135 transitions. [2021-10-05 22:15:21,346 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) [2021-10-05 22:15:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 135 transitions. [2021-10-05 22:15:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:15:21,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:21,347 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:21,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-05 22:15:21,347 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:21,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:21,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1887089061, now seen corresponding path program 4 times [2021-10-05 22:15:21,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:21,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572814940] [2021-10-05 22:15:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:21,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:21,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:21,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572814940] [2021-10-05 22:15:21,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572814940] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:21,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42779819] [2021-10-05 22:15:21,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:15:21,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:21,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:21,384 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:15:21,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-05 22:15:21,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:15:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:15:21,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-05 22:15:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:15:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:21,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42779819] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:21,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:15:21,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-05 22:15:21,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846681362] [2021-10-05 22:15:21,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 22:15:21,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 22:15:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:15:21,496 INFO L87 Difference]: Start difference. First operand 58 states and 135 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) [2021-10-05 22:15:21,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:21,535 INFO L93 Difference]: Finished difference Result 72 states and 153 transitions. [2021-10-05 22:15:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 22:15:21,536 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 [2021-10-05 22:15:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:21,537 INFO L225 Difference]: With dead ends: 72 [2021-10-05 22:15:21,537 INFO L226 Difference]: Without dead ends: 72 [2021-10-05 22:15:21,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:15:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-05 22:15:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 52. [2021-10-05 22:15:21,540 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) [2021-10-05 22:15:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 118 transitions. [2021-10-05 22:15:21,541 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 118 transitions. Word has length 14 [2021-10-05 22:15:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:21,541 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 118 transitions. [2021-10-05 22:15:21,542 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) [2021-10-05 22:15:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 118 transitions. [2021-10-05 22:15:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:15:21,542 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:21,543 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:21,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-05 22:15:21,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-05 22:15:21,751 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:21,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1281598227, now seen corresponding path program 5 times [2021-10-05 22:15:21,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:21,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504775648] [2021-10-05 22:15:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:21,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:21,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:21,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504775648] [2021-10-05 22:15:21,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504775648] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:21,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:15:21,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 22:15:21,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989961798] [2021-10-05 22:15:21,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 22:15:21,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:21,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 22:15:21,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:15:21,790 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) [2021-10-05 22:15:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:21,843 INFO L93 Difference]: Finished difference Result 56 states and 122 transitions. [2021-10-05 22:15:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:15:21,844 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 [2021-10-05 22:15:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:21,846 INFO L225 Difference]: With dead ends: 56 [2021-10-05 22:15:21,846 INFO L226 Difference]: Without dead ends: 52 [2021-10-05 22:15:21,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-05 22:15:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-05 22:15:21,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-05 22:15:21,854 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) [2021-10-05 22:15:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 116 transitions. [2021-10-05 22:15:21,855 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 116 transitions. Word has length 14 [2021-10-05 22:15:21,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:21,856 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 116 transitions. [2021-10-05 22:15:21,856 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) [2021-10-05 22:15:21,856 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 116 transitions. [2021-10-05 22:15:21,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:15:21,857 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:21,857 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:21,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-05 22:15:21,857 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:21,859 INFO L82 PathProgramCache]: Analyzing trace with hash 93077154, now seen corresponding path program 1 times [2021-10-05 22:15:21,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:21,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54928777] [2021-10-05 22:15:21,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:21,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:21,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:21,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54928777] [2021-10-05 22:15:21,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54928777] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:21,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308368457] [2021-10-05 22:15:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:21,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:21,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:21,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:15:22,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-05 22:15:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:22,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 22:15:22,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:15:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:22,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308368457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:22,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:15:22,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 22:15:22,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969623595] [2021-10-05 22:15:22,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 22:15:22,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:22,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 22:15:22,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:15:22,258 INFO L87 Difference]: Start difference. First operand 52 states and 116 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:22,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:22,385 INFO L93 Difference]: Finished difference Result 65 states and 138 transitions. [2021-10-05 22:15:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:15:22,385 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:15:22,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:22,403 INFO L225 Difference]: With dead ends: 65 [2021-10-05 22:15:22,403 INFO L226 Difference]: Without dead ends: 42 [2021-10-05 22:15:22,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:15:22,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-05 22:15:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-05 22:15:22,406 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) [2021-10-05 22:15:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 90 transitions. [2021-10-05 22:15:22,407 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 90 transitions. Word has length 15 [2021-10-05 22:15:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:22,407 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 90 transitions. [2021-10-05 22:15:22,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 90 transitions. [2021-10-05 22:15:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:15:22,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:22,408 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:22,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-05 22:15:22,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:22,623 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:22,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:22,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1057865590, now seen corresponding path program 2 times [2021-10-05 22:15:22,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:22,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211383780] [2021-10-05 22:15:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:22,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:22,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:22,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211383780] [2021-10-05 22:15:22,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211383780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:22,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106375338] [2021-10-05 22:15:22,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:15:22,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:22,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:22,711 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:15:22,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-05 22:15:22,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:15:22,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:15:22,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 22:15:22,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:15:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:22,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106375338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:22,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:15:22,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 22:15:22,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705278126] [2021-10-05 22:15:22,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 22:15:22,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:22,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 22:15:22,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:15:22,968 INFO L87 Difference]: Start difference. First operand 42 states and 90 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:23,099 INFO L93 Difference]: Finished difference Result 57 states and 120 transitions. [2021-10-05 22:15:23,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:15:23,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:15:23,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:23,101 INFO L225 Difference]: With dead ends: 57 [2021-10-05 22:15:23,101 INFO L226 Difference]: Without dead ends: 48 [2021-10-05 22:15:23,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:15:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-05 22:15:23,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-10-05 22:15:23,104 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) [2021-10-05 22:15:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 97 transitions. [2021-10-05 22:15:23,104 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 97 transitions. Word has length 15 [2021-10-05 22:15:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:23,105 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 97 transitions. [2021-10-05 22:15:23,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 97 transitions. [2021-10-05 22:15:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:15:23,106 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:23,106 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:23,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-05 22:15:23,319 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,SelfDestructingSolverStorable17 [2021-10-05 22:15:23,320 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:23,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:23,321 INFO L82 PathProgramCache]: Analyzing trace with hash 869548030, now seen corresponding path program 3 times [2021-10-05 22:15:23,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:23,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159914019] [2021-10-05 22:15:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:23,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:23,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:23,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159914019] [2021-10-05 22:15:23,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159914019] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:23,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760179339] [2021-10-05 22:15:23,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:15:23,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:23,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:23,407 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:15:23,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-05 22:15:23,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-05 22:15:23,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:15:23,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 22:15:23,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:15:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:23,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760179339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:23,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:15:23,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 22:15:23,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779864875] [2021-10-05 22:15:23,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 22:15:23,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:23,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 22:15:23,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:15:23,664 INFO L87 Difference]: Start difference. First operand 44 states and 97 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:23,776 INFO L93 Difference]: Finished difference Result 53 states and 111 transitions. [2021-10-05 22:15:23,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:15:23,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2021-10-05 22:15:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:23,777 INFO L225 Difference]: With dead ends: 53 [2021-10-05 22:15:23,777 INFO L226 Difference]: Without dead ends: 36 [2021-10-05 22:15:23,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:15:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-05 22:15:23,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-05 22:15:23,780 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) [2021-10-05 22:15:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-10-05 22:15:23,780 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 15 [2021-10-05 22:15:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:23,780 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-10-05 22:15:23,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-10-05 22:15:23,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:15:23,781 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:23,781 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:23,819 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 [2021-10-05 22:15:23,991 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 [2021-10-05 22:15:23,992 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1797173318, now seen corresponding path program 4 times [2021-10-05 22:15:23,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:23,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137729572] [2021-10-05 22:15:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:23,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:24,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:24,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137729572] [2021-10-05 22:15:24,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137729572] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:24,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731952862] [2021-10-05 22:15:24,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:15:24,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:24,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:24,076 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:15:24,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-05 22:15:24,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:15:24,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:15:24,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 22:15:24,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:15:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:24,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731952862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:24,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:15:24,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-05 22:15:24,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040592213] [2021-10-05 22:15:24,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-05 22:15:24,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:24,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-05 22:15:24,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-05 22:15:24,272 INFO L87 Difference]: Start difference. First operand 36 states and 68 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:24,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:24,381 INFO L93 Difference]: Finished difference Result 53 states and 102 transitions. [2021-10-05 22:15:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:15:24,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:15:24,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:24,383 INFO L225 Difference]: With dead ends: 53 [2021-10-05 22:15:24,383 INFO L226 Difference]: Without dead ends: 44 [2021-10-05 22:15:24,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:15:24,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-05 22:15:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-05 22:15:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 86 transitions. [2021-10-05 22:15:24,387 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 86 transitions. Word has length 15 [2021-10-05 22:15:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:24,388 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 86 transitions. [2021-10-05 22:15:24,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 86 transitions. [2021-10-05 22:15:24,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:15:24,389 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:24,389 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:24,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-05 22:15:24,603 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 [2021-10-05 22:15:24,604 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:24,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:24,605 INFO L82 PathProgramCache]: Analyzing trace with hash 265363234, now seen corresponding path program 5 times [2021-10-05 22:15:24,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:24,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239224280] [2021-10-05 22:15:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:24,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:24,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:24,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239224280] [2021-10-05 22:15:24,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239224280] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:24,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135064201] [2021-10-05 22:15:24,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:15:24,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:24,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:24,699 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:15:24,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-05 22:15:24,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 22:15:24,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:15:24,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-05 22:15:24,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:15:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:24,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135064201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:24,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:15:24,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-10-05 22:15:24,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315264683] [2021-10-05 22:15:24,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 22:15:24,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:24,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 22:15:24,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-05 22:15:24,923 INFO L87 Difference]: Start difference. First operand 44 states and 86 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:25,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:25,047 INFO L93 Difference]: Finished difference Result 49 states and 90 transitions. [2021-10-05 22:15:25,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 22:15:25,048 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:15:25,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:25,049 INFO L225 Difference]: With dead ends: 49 [2021-10-05 22:15:25,049 INFO L226 Difference]: Without dead ends: 40 [2021-10-05 22:15:25,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-10-05 22:15:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-05 22:15:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-05 22:15:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-10-05 22:15:25,052 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 15 [2021-10-05 22:15:25,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:25,052 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-10-05 22:15:25,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-10-05 22:15:25,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:15:25,054 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:25,054 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:25,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-05 22:15:25,261 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 [2021-10-05 22:15:25,262 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:25,263 INFO L82 PathProgramCache]: Analyzing trace with hash 77045674, now seen corresponding path program 6 times [2021-10-05 22:15:25,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:25,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903464598] [2021-10-05 22:15:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:25,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:25,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:25,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903464598] [2021-10-05 22:15:25,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903464598] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:25,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479567394] [2021-10-05 22:15:25,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 22:15:25,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:25,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:25,345 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:15:25,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-05 22:15:25,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 22:15:25,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:15:25,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 22:15:25,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:15:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:25,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479567394] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:25,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:15:25,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-05 22:15:25,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791456734] [2021-10-05 22:15:25,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-05 22:15:25,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:25,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-05 22:15:25,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-05 22:15:25,582 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:25,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:25,657 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2021-10-05 22:15:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:15:25,658 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2021-10-05 22:15:25,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:25,658 INFO L225 Difference]: With dead ends: 45 [2021-10-05 22:15:25,659 INFO L226 Difference]: Without dead ends: 36 [2021-10-05 22:15:25,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:15:25,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-05 22:15:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-10-05 22:15:25,661 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) [2021-10-05 22:15:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 62 transitions. [2021-10-05 22:15:25,662 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 62 transitions. Word has length 15 [2021-10-05 22:15:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:25,663 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 62 transitions. [2021-10-05 22:15:25,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:25,663 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 62 transitions. [2021-10-05 22:15:25,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:15:25,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:25,664 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:25,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-05 22:15:25,873 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 [2021-10-05 22:15:25,874 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:25,875 INFO L82 PathProgramCache]: Analyzing trace with hash -82523962, now seen corresponding path program 7 times [2021-10-05 22:15:25,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:25,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288654279] [2021-10-05 22:15:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:25,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:25,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:25,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288654279] [2021-10-05 22:15:25,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288654279] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:25,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451670606] [2021-10-05 22:15:25,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 22:15:25,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:25,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:25,979 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:15:26,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-05 22:15:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:26,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 22:15:26,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:15:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:26,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451670606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:26,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:15:26,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-05 22:15:26,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652894056] [2021-10-05 22:15:26,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 22:15:26,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:26,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 22:15:26,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-05 22:15:26,206 INFO L87 Difference]: Start difference. First operand 34 states and 62 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:26,290 INFO L93 Difference]: Finished difference Result 49 states and 91 transitions. [2021-10-05 22:15:26,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:15:26,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:15:26,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:26,291 INFO L225 Difference]: With dead ends: 49 [2021-10-05 22:15:26,291 INFO L226 Difference]: Without dead ends: 40 [2021-10-05 22:15:26,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:15:26,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-05 22:15:26,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-05 22:15:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-10-05 22:15:26,295 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 15 [2021-10-05 22:15:26,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:26,295 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-10-05 22:15:26,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:26,295 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-10-05 22:15:26,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:15:26,296 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:26,296 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:26,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-05 22:15:26,505 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 [2021-10-05 22:15:26,506 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:26,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:26,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1802651606, now seen corresponding path program 8 times [2021-10-05 22:15:26,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:26,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730312149] [2021-10-05 22:15:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:26,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:26,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:26,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730312149] [2021-10-05 22:15:26,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730312149] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:26,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344895904] [2021-10-05 22:15:26,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:15:26,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:26,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:26,597 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:15:26,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-05 22:15:26,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:15:26,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:15:26,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 22:15:26,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:15:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:26,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344895904] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:26,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:15:26,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-05 22:15:26,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999823111] [2021-10-05 22:15:26,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 22:15:26,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:26,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 22:15:26,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-05 22:15:26,843 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:26,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:26,952 INFO L93 Difference]: Finished difference Result 49 states and 91 transitions. [2021-10-05 22:15:26,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:15:26,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:15:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:26,954 INFO L225 Difference]: With dead ends: 49 [2021-10-05 22:15:26,954 INFO L226 Difference]: Without dead ends: 36 [2021-10-05 22:15:26,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:15:26,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-05 22:15:26,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-05 22:15:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 65 transitions. [2021-10-05 22:15:26,957 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 65 transitions. Word has length 15 [2021-10-05 22:15:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:26,957 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 65 transitions. [2021-10-05 22:15:26,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 65 transitions. [2021-10-05 22:15:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:15:26,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:26,962 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:26,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-05 22:15:27,163 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 [2021-10-05 22:15:27,163 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:27,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:27,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1926624110, now seen corresponding path program 9 times [2021-10-05 22:15:27,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:27,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144372665] [2021-10-05 22:15:27,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:27,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:27,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:27,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144372665] [2021-10-05 22:15:27,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144372665] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:27,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951445974] [2021-10-05 22:15:27,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:15:27,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:27,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:27,250 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:15:27,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-05 22:15:27,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 22:15:27,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:15:27,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 22:15:27,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:15:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:27,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951445974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:27,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:15:27,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 22:15:27,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432878755] [2021-10-05 22:15:27,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 22:15:27,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 22:15:27,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:15:27,497 INFO L87 Difference]: Start difference. First operand 36 states and 65 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:27,583 INFO L93 Difference]: Finished difference Result 45 states and 77 transitions. [2021-10-05 22:15:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:15:27,583 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2021-10-05 22:15:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:27,584 INFO L225 Difference]: With dead ends: 45 [2021-10-05 22:15:27,584 INFO L226 Difference]: Without dead ends: 36 [2021-10-05 22:15:27,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:15:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-05 22:15:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-05 22:15:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 63 transitions. [2021-10-05 22:15:27,587 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 63 transitions. Word has length 15 [2021-10-05 22:15:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:27,588 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 63 transitions. [2021-10-05 22:15:27,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 63 transitions. [2021-10-05 22:15:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:15:27,589 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:27,589 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:27,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-05 22:15:27,802 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 [2021-10-05 22:15:27,803 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:27,804 INFO L82 PathProgramCache]: Analyzing trace with hash 206496466, now seen corresponding path program 10 times [2021-10-05 22:15:27,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:27,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828125070] [2021-10-05 22:15:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:27,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:27,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:27,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828125070] [2021-10-05 22:15:27,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828125070] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:27,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487985396] [2021-10-05 22:15:27,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:15:27,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:27,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:27,897 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:15:27,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-05 22:15:28,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:15:28,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:15:28,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 22:15:28,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:15:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:28,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487985396] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:28,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:15:28,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 22:15:28,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570141397] [2021-10-05 22:15:28,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 22:15:28,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:28,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 22:15:28,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:15:28,188 INFO L87 Difference]: Start difference. First operand 36 states and 63 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:28,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:28,260 INFO L93 Difference]: Finished difference Result 43 states and 72 transitions. [2021-10-05 22:15:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 22:15:28,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2021-10-05 22:15:28,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:28,262 INFO L225 Difference]: With dead ends: 43 [2021-10-05 22:15:28,262 INFO L226 Difference]: Without dead ends: 32 [2021-10-05 22:15:28,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:15:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-05 22:15:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-05 22:15:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 51 transitions. [2021-10-05 22:15:28,265 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 51 transitions. Word has length 15 [2021-10-05 22:15:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:28,265 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 51 transitions. [2021-10-05 22:15:28,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 51 transitions. [2021-10-05 22:15:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:15:28,266 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:15:28,266 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:15:28,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-05 22:15:28,472 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 [2021-10-05 22:15:28,473 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:15:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:15:28,474 INFO L82 PathProgramCache]: Analyzing trace with hash -731465982, now seen corresponding path program 11 times [2021-10-05 22:15:28,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:15:28,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905482983] [2021-10-05 22:15:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:15:28,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:15:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:15:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:28,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:15:28,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905482983] [2021-10-05 22:15:28,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905482983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:15:28,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242420466] [2021-10-05 22:15:28,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:15:28,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:15:28,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:15:28,554 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:15:28,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-05 22:15:28,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:15:28,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:15:28,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-05 22:15:28,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:15:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:15:28,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242420466] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:15:28,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-05 22:15:28,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-10-05 22:15:28,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930367096] [2021-10-05 22:15:28,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:15:28,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:15:28,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:15:28,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-05 22:15:28,815 INFO L87 Difference]: Start difference. First operand 32 states and 51 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:15:28,834 INFO L93 Difference]: Finished difference Result 31 states and 50 transitions. [2021-10-05 22:15:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 22:15:28,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2021-10-05 22:15:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:15:28,835 INFO L225 Difference]: With dead ends: 31 [2021-10-05 22:15:28,835 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 22:15:28,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-05 22:15:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 22:15:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 22:15:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 22:15:28,837 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-10-05 22:15:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:15:28,837 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 22:15:28,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:15:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 22:15:28,838 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 22:15:28,841 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 22:15:28,842 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 22:15:28,842 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 22:15:28,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-05 22:15:29,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-05 22:15:29,062 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 22:15:29,062 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 22:15:29,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 10:15:29 BasicIcfg [2021-10-05 22:15:29,064 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 22:15:29,065 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 22:15:29,065 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 22:15:29,065 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 22:15:29,066 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:15:15" (3/4) ... [2021-10-05 22:15:29,070 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 22:15:29,076 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 22:15:29,076 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 22:15:29,080 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-05 22:15:29,081 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-05 22:15:29,086 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 22:15:29,087 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 22:15:29,121 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 22:15:29,122 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 22:15:29,124 INFO L168 Benchmark]: Toolchain (without parser) took 14974.32 ms. Allocated memory was 50.3 MB in the beginning and 107.0 MB in the end (delta: 56.6 MB). Free memory was 26.7 MB in the beginning and 85.1 MB in the end (delta: -58.4 MB). Peak memory consumption was 60.8 MB. Max. memory is 16.1 GB. [2021-10-05 22:15:29,124 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 41.9 MB. Free memory was 19.1 MB in the beginning and 19.1 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 22:15:29,125 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.91 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 27.6 MB in the end (delta: -1.2 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-10-05 22:15:29,125 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.11 ms. Allocated memory is still 50.3 MB. Free memory was 27.6 MB in the beginning and 26.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 22:15:29,125 INFO L168 Benchmark]: Boogie Preprocessor took 67.98 ms. Allocated memory is still 50.3 MB. Free memory was 26.0 MB in the beginning and 24.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 22:15:29,126 INFO L168 Benchmark]: RCFGBuilder took 532.63 ms. Allocated memory is still 50.3 MB. Free memory was 24.8 MB in the beginning and 25.8 MB in the end (delta: -986.8 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2021-10-05 22:15:29,126 INFO L168 Benchmark]: TraceAbstraction took 13911.86 ms. Allocated memory was 50.3 MB in the beginning and 107.0 MB in the end (delta: 56.6 MB). Free memory was 25.3 MB in the beginning and 27.8 MB in the end (delta: -2.5 MB). Peak memory consumption was 53.7 MB. Max. memory is 16.1 GB. [2021-10-05 22:15:29,127 INFO L168 Benchmark]: Witness Printer took 57.13 ms. Allocated memory is still 107.0 MB. Free memory was 26.8 MB in the beginning and 85.1 MB in the end (delta: -58.3 MB). Peak memory consumption was 2.5 MB. Max. memory is 16.1 GB. [2021-10-05 22:15:29,129 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 41.9 MB. Free memory was 19.1 MB in the beginning and 19.1 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 342.91 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 27.6 MB in the end (delta: -1.2 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.11 ms. Allocated memory is still 50.3 MB. Free memory was 27.6 MB in the beginning and 26.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 67.98 ms. Allocated memory is still 50.3 MB. Free memory was 26.0 MB in the beginning and 24.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 532.63 ms. Allocated memory is still 50.3 MB. Free memory was 24.8 MB in the beginning and 25.8 MB in the end (delta: -986.8 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13911.86 ms. Allocated memory was 50.3 MB in the beginning and 107.0 MB in the end (delta: 56.6 MB). Free memory was 25.3 MB in the beginning and 27.8 MB in the end (delta: -2.5 MB). Peak memory consumption was 53.7 MB. Max. memory is 16.1 GB. * Witness Printer took 57.13 ms. Allocated memory is still 107.0 MB. Free memory was 26.8 MB in the beginning and 85.1 MB in the end (delta: -58.3 MB). Peak memory consumption was 2.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2821.1ms, 75 PlacesBefore, 23 PlacesAfterwards, 74 TransitionsBefore, 18 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 6 FixpointIterations, 37 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 65 TotalNumberOfCompositions, 490 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 490, positive: 490, positive conditional: 0, positive unconditional: 490, 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: 347, positive: 347, positive conditional: 0, positive unconditional: 347, 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: 347, positive: 345, positive conditional: 0, positive unconditional: 345, 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: 7, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 490, positive: 143, positive conditional: 0, positive unconditional: 143, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 347, unknown conditional: 0, unknown unconditional: 347] , 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: 71]: 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, 89 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 13770.7ms, OverallIterations: 27, TraceHistogramMax: 1, EmptinessCheckTime: 37.2ms, AutomataDifference: 2290.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2879.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 574 SDtfs, 514 SDslu, 1696 SDs, 0 SdLazy, 1865 SolverSat, 141 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1119.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 421 GetRequests, 166 SyntacticMatches, 13 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1568.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=12, InterpolantAutomatonStates: 204, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 161.4ms AutomataMinimizationTime, 27 MinimizatonAttempts, 198 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 124.9ms SsaConstructionTime, 680.2ms SatisfiabilityAnalysisTime, 3369.0ms InterpolantComputationTime, 576 NumberOfCodeBlocks, 576 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 536 ConstructedInterpolants, 0 QuantifiedInterpolants, 2916 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1242 ConjunctsInSsa, 204 ConjunctsInUnsatCore, 40 InterpolantComputations, 15 PerfectInterpolantSequences, 11/56 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-05 22:15:29,177 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...