./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel/misc-3.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/parallel/misc-3.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 2052cbc9567a13544119e06f05cbef43da200937 -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 22:35:01,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 22:35:01,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 22:35:01,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 22:35:01,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 22:35:01,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 22:35:01,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 22:35:01,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 22:35:01,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 22:35:01,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 22:35:01,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 22:35:01,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 22:35:01,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 22:35:01,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 22:35:01,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 22:35:01,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 22:35:01,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 22:35:01,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 22:35:01,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 22:35:01,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 22:35:01,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 22:35:01,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 22:35:01,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 22:35:01,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 22:35:01,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 22:35:01,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 22:35:01,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 22:35:01,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 22:35:01,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 22:35:01,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 22:35:01,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 22:35:01,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 22:35:01,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 22:35:01,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 22:35:01,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 22:35:01,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 22:35:01,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 22:35:01,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 22:35:01,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 22:35:01,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 22:35:01,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 22:35:01,677 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 22:35:01,728 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 22:35:01,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 22:35:01,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 22:35:01,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 22:35:01,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 22:35:01,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 22:35:01,731 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 22:35:01,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 22:35:01,732 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 22:35:01,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 22:35:01,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 22:35:01,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 22:35:01,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 22:35:01,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 22:35:01,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 22:35:01,734 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 22:35:01,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 22:35:01,734 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 22:35:01,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 22:35:01,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 22:35:01,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 22:35:01,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 22:35:01,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 22:35:01,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 22:35:01,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 22:35:01,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 22:35:01,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 22:35:01,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 22:35:01,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 22:35:01,737 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 22:35:01,738 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2052cbc9567a13544119e06f05cbef43da200937 [2021-10-05 22:35:02,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 22:35:02,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 22:35:02,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 22:35:02,186 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 22:35:02,187 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 22:35:02,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel/misc-3.wvr.c [2021-10-05 22:35:02,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dc317ef2/85eab8b0a35f46b3b25461b8cdb086f0/FLAG82fdda64a [2021-10-05 22:35:02,976 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 22:35:02,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel/misc-3.wvr.c [2021-10-05 22:35:02,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dc317ef2/85eab8b0a35f46b3b25461b8cdb086f0/FLAG82fdda64a [2021-10-05 22:35:03,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dc317ef2/85eab8b0a35f46b3b25461b8cdb086f0 [2021-10-05 22:35:03,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 22:35:03,357 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 22:35:03,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 22:35:03,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 22:35:03,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 22:35:03,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:35:03" (1/1) ... [2021-10-05 22:35:03,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35997e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:03, skipping insertion in model container [2021-10-05 22:35:03,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:35:03" (1/1) ... [2021-10-05 22:35:03,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 22:35:03,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 22:35:03,577 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/parallel/misc-3.wvr.c[2254,2267] [2021-10-05 22:35:03,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 22:35:03,609 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 22:35:03,634 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/parallel/misc-3.wvr.c[2254,2267] [2021-10-05 22:35:03,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 22:35:03,653 INFO L208 MainTranslator]: Completed translation [2021-10-05 22:35:03,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:03 WrapperNode [2021-10-05 22:35:03,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 22:35:03,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 22:35:03,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 22:35:03,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 22:35:03,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:03" (1/1) ... [2021-10-05 22:35:03,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:03" (1/1) ... [2021-10-05 22:35:03,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 22:35:03,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 22:35:03,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 22:35:03,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 22:35:03,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:03" (1/1) ... [2021-10-05 22:35:03,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:03" (1/1) ... [2021-10-05 22:35:03,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:03" (1/1) ... [2021-10-05 22:35:03,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:03" (1/1) ... [2021-10-05 22:35:03,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:03" (1/1) ... [2021-10-05 22:35:03,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:03" (1/1) ... [2021-10-05 22:35:03,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:03" (1/1) ... [2021-10-05 22:35:03,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 22:35:03,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 22:35:03,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 22:35:03,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 22:35:03,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:03" (1/1) ... [2021-10-05 22:35:03,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 22:35:03,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:03,772 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 22:35:03,782 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 22:35:03,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 22:35:03,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 22:35:03,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 22:35:03,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 22:35:03,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 22:35:03,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 22:35:03,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 22:35:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-05 22:35:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-05 22:35:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 22:35:03,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 22:35:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 22:35:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 22:35:03,835 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 22:35:04,172 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 22:35:04,173 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-05 22:35:04,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:35:04 BoogieIcfgContainer [2021-10-05 22:35:04,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 22:35:04,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 22:35:04,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 22:35:04,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 22:35:04,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 10:35:03" (1/3) ... [2021-10-05 22:35:04,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70bb6728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:35:04, skipping insertion in model container [2021-10-05 22:35:04,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:03" (2/3) ... [2021-10-05 22:35:04,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70bb6728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:35:04, skipping insertion in model container [2021-10-05 22:35:04,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:35:04" (3/3) ... [2021-10-05 22:35:04,211 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-3.wvr.c [2021-10-05 22:35:04,225 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 22:35:04,226 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 22:35:04,226 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 22:35:04,226 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 22:35:04,314 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,314 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,315 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,315 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,316 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,316 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,317 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,317 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,318 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,318 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,319 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,319 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,319 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,320 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,320 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,320 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,321 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,322 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,322 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,322 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,324 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,324 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,325 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,325 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,325 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,326 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,326 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,326 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,330 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,331 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,331 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,331 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,331 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,334 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,335 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,335 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:04,346 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-05 22:35:04,405 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 22:35:04,414 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 22:35:04,414 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-05 22:35:04,437 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 22:35:04,454 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 86 transitions, 188 flow [2021-10-05 22:35:04,462 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 86 transitions, 188 flow [2021-10-05 22:35:04,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 86 transitions, 188 flow [2021-10-05 22:35:04,567 INFO L129 PetriNetUnfolder]: 11/84 cut-off events. [2021-10-05 22:35:04,568 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-05 22:35:04,577 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 11/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2021-10-05 22:35:04,583 INFO L116 LiptonReduction]: Number of co-enabled transitions 1088 [2021-10-05 22:35:08,243 INFO L131 LiptonReduction]: Checked pairs total: 1023 [2021-10-05 22:35:08,243 INFO L133 LiptonReduction]: Total number of compositions: 81 [2021-10-05 22:35:08,254 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-10-05 22:35:08,267 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 22:35:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 22:35:08,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-05 22:35:08,275 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:08,276 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:08,276 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:08,283 INFO L82 PathProgramCache]: Analyzing trace with hash 848718317, now seen corresponding path program 1 times [2021-10-05 22:35:08,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:08,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256333629] [2021-10-05 22:35:08,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:08,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:08,518 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 22:35:08,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:08,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256333629] [2021-10-05 22:35:08,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256333629] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:35:08,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:35:08,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 22:35:08,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867730934] [2021-10-05 22:35:08,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 22:35:08,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 22:35:08,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 22:35:08,558 INFO L87 Difference]: Start difference. First operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 22:35:08,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:08,593 INFO L93 Difference]: Finished difference Result 26 states and 54 transitions. [2021-10-05 22:35:08,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 22:35:08,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-05 22:35:08,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:08,609 INFO L225 Difference]: With dead ends: 26 [2021-10-05 22:35:08,609 INFO L226 Difference]: Without dead ends: 26 [2021-10-05 22:35:08,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 22:35:08,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-05 22:35:08,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-05 22:35:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:35:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2021-10-05 22:35:08,658 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 11 [2021-10-05 22:35:08,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:08,662 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2021-10-05 22:35:08,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 22:35:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2021-10-05 22:35:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-05 22:35:08,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:08,667 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:08,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 22:35:08,668 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:08,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:08,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1589020178, now seen corresponding path program 1 times [2021-10-05 22:35:08,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:08,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61835826] [2021-10-05 22:35:08,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:08,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 22:35:08,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:08,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61835826] [2021-10-05 22:35:08,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61835826] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:35:08,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:35:08,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 22:35:08,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722258006] [2021-10-05 22:35:08,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 22:35:08,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:08,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 22:35:08,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 22:35:08,823 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 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 22:35:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:08,833 INFO L93 Difference]: Finished difference Result 34 states and 73 transitions. [2021-10-05 22:35:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 22:35:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-10-05 22:35:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:08,835 INFO L225 Difference]: With dead ends: 34 [2021-10-05 22:35:08,836 INFO L226 Difference]: Without dead ends: 34 [2021-10-05 22:35:08,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 22:35:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-05 22:35:08,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-05 22:35:08,843 INFO L82 GeneralOperation]: Start removeUnreachable. 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 22:35:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 73 transitions. [2021-10-05 22:35:08,844 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 73 transitions. Word has length 12 [2021-10-05 22:35:08,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:08,845 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 73 transitions. [2021-10-05 22:35:08,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 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 22:35:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 73 transitions. [2021-10-05 22:35:08,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 22:35:08,847 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:08,847 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:08,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 22:35:08,848 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:08,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2067944405, now seen corresponding path program 1 times [2021-10-05 22:35:08,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:08,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853827818] [2021-10-05 22:35:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:08,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:08,957 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 22:35:08,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:08,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853827818] [2021-10-05 22:35:08,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853827818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:08,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310767980] [2021-10-05 22:35:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:08,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:08,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:08,962 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 22:35:08,966 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 22:35:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:09,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-05 22:35:09,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:09,242 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 22:35:09,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310767980] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:09,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:09,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-10-05 22:35:09,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948562425] [2021-10-05 22:35:09,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 22:35:09,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:09,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 22:35:09,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:35:09,246 INFO L87 Difference]: Start difference. First operand 34 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 22:35:09,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:09,285 INFO L93 Difference]: Finished difference Result 42 states and 92 transitions. [2021-10-05 22:35:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 22:35:09,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 22:35:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:09,289 INFO L225 Difference]: With dead ends: 42 [2021-10-05 22:35:09,290 INFO L226 Difference]: Without dead ends: 42 [2021-10-05 22:35:09,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:35:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-05 22:35:09,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-05 22:35:09,303 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 22:35:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 92 transitions. [2021-10-05 22:35:09,308 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 92 transitions. Word has length 13 [2021-10-05 22:35:09,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:09,309 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 92 transitions. [2021-10-05 22:35:09,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 22:35:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 92 transitions. [2021-10-05 22:35:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 22:35:09,314 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:09,314 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:09,384 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 22:35:09,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:09,516 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:09,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:09,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1811251344, now seen corresponding path program 2 times [2021-10-05 22:35:09,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:09,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421851158] [2021-10-05 22:35:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:09,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 22:35:09,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:09,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421851158] [2021-10-05 22:35:09,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421851158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:09,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720943853] [2021-10-05 22:35:09,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:35:09,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:09,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:09,700 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 22:35:09,713 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 22:35:09,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:35:09,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:35:09,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-05 22:35:09,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 22:35:10,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720943853] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:10,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:10,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-10-05 22:35:10,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723681129] [2021-10-05 22:35:10,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 22:35:10,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:10,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 22:35:10,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:35:10,167 INFO L87 Difference]: Start difference. First operand 42 states and 92 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 22:35:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:10,231 INFO L93 Difference]: Finished difference Result 52 states and 116 transitions. [2021-10-05 22:35:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 22:35:10,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 14 [2021-10-05 22:35:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:10,238 INFO L225 Difference]: With dead ends: 52 [2021-10-05 22:35:10,240 INFO L226 Difference]: Without dead ends: 52 [2021-10-05 22:35:10,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-05 22:35:10,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-05 22:35:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-05 22:35:10,255 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 22:35:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 116 transitions. [2021-10-05 22:35:10,266 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 116 transitions. Word has length 14 [2021-10-05 22:35:10,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:10,267 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 116 transitions. [2021-10-05 22:35:10,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 22:35:10,269 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 116 transitions. [2021-10-05 22:35:10,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:35:10,271 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:10,271 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:10,314 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 22:35:10,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:10,486 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:10,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:10,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1799034477, now seen corresponding path program 3 times [2021-10-05 22:35:10,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:10,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738010932] [2021-10-05 22:35:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:10,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:10,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:10,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738010932] [2021-10-05 22:35:10,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738010932] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:10,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594360239] [2021-10-05 22:35:10,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:35:10,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:10,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:10,905 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 22:35:10,930 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 22:35:11,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-05 22:35:11,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:35:11,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-05 22:35:11,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:11,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594360239] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:11,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:11,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-05 22:35:11,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017863856] [2021-10-05 22:35:11,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 22:35:11,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:11,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 22:35:11,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:35:11,374 INFO L87 Difference]: Start difference. First operand 52 states and 116 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:35:11,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:11,762 INFO L93 Difference]: Finished difference Result 152 states and 336 transitions. [2021-10-05 22:35:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-05 22:35:11,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:35:11,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:11,770 INFO L225 Difference]: With dead ends: 152 [2021-10-05 22:35:11,771 INFO L226 Difference]: Without dead ends: 142 [2021-10-05 22:35:11,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-10-05 22:35:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-05 22:35:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 70. [2021-10-05 22:35:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.4927536231884058) internal successors, (172), 69 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 22:35:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2021-10-05 22:35:11,788 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 15 [2021-10-05 22:35:11,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:11,788 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2021-10-05 22:35:11,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:35:11,788 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2021-10-05 22:35:11,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:35:11,790 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:11,790 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:11,840 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 22:35:12,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:12,004 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:12,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:12,005 INFO L82 PathProgramCache]: Analyzing trace with hash -493695473, now seen corresponding path program 4 times [2021-10-05 22:35:12,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:12,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88905188] [2021-10-05 22:35:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:12,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:12,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:12,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88905188] [2021-10-05 22:35:12,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88905188] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:12,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923366642] [2021-10-05 22:35:12,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:35:12,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:12,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:12,316 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 22:35:12,340 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 22:35:12,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:35:12,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:35:12,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-05 22:35:12,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:12,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923366642] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:12,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:12,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-05 22:35:12,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022136515] [2021-10-05 22:35:12,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 22:35:12,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:12,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 22:35:12,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:35:12,753 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:35:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:13,157 INFO L93 Difference]: Finished difference Result 146 states and 333 transitions. [2021-10-05 22:35:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 22:35:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 22:35:13,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:13,159 INFO L225 Difference]: With dead ends: 146 [2021-10-05 22:35:13,159 INFO L226 Difference]: Without dead ends: 136 [2021-10-05 22:35:13,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-10-05 22:35:13,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-05 22:35:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2021-10-05 22:35:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.6626506024096384) internal successors, (221), 83 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 22:35:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 221 transitions. [2021-10-05 22:35:13,170 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 221 transitions. Word has length 15 [2021-10-05 22:35:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:13,171 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 221 transitions. [2021-10-05 22:35:13,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:35:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 221 transitions. [2021-10-05 22:35:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:35:13,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:13,173 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:13,201 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 22:35:13,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:13,387 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:13,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:13,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1083584305, now seen corresponding path program 5 times [2021-10-05 22:35:13,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:13,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044582217] [2021-10-05 22:35:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:13,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:13,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:13,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044582217] [2021-10-05 22:35:13,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044582217] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:13,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713409642] [2021-10-05 22:35:13,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:35:13,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:13,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:13,733 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 22:35:13,754 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 22:35:13,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 22:35:13,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:35:13,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-05 22:35:13,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:14,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713409642] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:14,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:14,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-05 22:35:14,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319167141] [2021-10-05 22:35:14,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 22:35:14,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:14,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 22:35:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-05 22:35:14,160 INFO L87 Difference]: Start difference. First operand 84 states and 221 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 22:35:14,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:14,331 INFO L93 Difference]: Finished difference Result 198 states and 484 transitions. [2021-10-05 22:35:14,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 22:35:14,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 22:35:14,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:14,334 INFO L225 Difference]: With dead ends: 198 [2021-10-05 22:35:14,334 INFO L226 Difference]: Without dead ends: 156 [2021-10-05 22:35:14,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:35:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-05 22:35:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 106. [2021-10-05 22:35:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.7333333333333334) internal successors, (287), 105 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 22:35:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 287 transitions. [2021-10-05 22:35:14,346 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 287 transitions. Word has length 15 [2021-10-05 22:35:14,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:14,347 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 287 transitions. [2021-10-05 22:35:14,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 22:35:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 287 transitions. [2021-10-05 22:35:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:35:14,349 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:14,349 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:14,393 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 22:35:14,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:14,564 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:14,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:14,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1446120109, now seen corresponding path program 6 times [2021-10-05 22:35:14,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:14,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656078828] [2021-10-05 22:35:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:14,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:14,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:14,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656078828] [2021-10-05 22:35:14,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656078828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:14,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959587892] [2021-10-05 22:35:14,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 22:35:14,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:14,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:14,764 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 22:35:14,787 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 22:35:14,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 22:35:14,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:35:14,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 22:35:14,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:15,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959587892] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:15,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:15,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-05 22:35:15,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703503007] [2021-10-05 22:35:15,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:35:15,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:15,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:35:15,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:35:15,520 INFO L87 Difference]: Start difference. First operand 106 states and 287 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:35:16,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:16,046 INFO L93 Difference]: Finished difference Result 179 states and 434 transitions. [2021-10-05 22:35:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-05 22:35:16,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 22:35:16,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:16,049 INFO L225 Difference]: With dead ends: 179 [2021-10-05 22:35:16,049 INFO L226 Difference]: Without dead ends: 156 [2021-10-05 22:35:16,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 492.3ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-10-05 22:35:16,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-05 22:35:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 122. [2021-10-05 22:35:16,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.760330578512397) internal successors, (334), 121 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 22:35:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 334 transitions. [2021-10-05 22:35:16,060 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 334 transitions. Word has length 15 [2021-10-05 22:35:16,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:16,061 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 334 transitions. [2021-10-05 22:35:16,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:35:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 334 transitions. [2021-10-05 22:35:16,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 22:35:16,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:16,063 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:16,104 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 22:35:16,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:16,277 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash 339435501, now seen corresponding path program 7 times [2021-10-05 22:35:16,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:16,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074711845] [2021-10-05 22:35:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:16,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:16,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:16,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074711845] [2021-10-05 22:35:16,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074711845] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:16,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571789504] [2021-10-05 22:35:16,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 22:35:16,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:16,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:16,563 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 22:35:16,576 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 22:35:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:16,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-05 22:35:16,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:17,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571789504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:17,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:17,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-05 22:35:17,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271061900] [2021-10-05 22:35:17,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 22:35:17,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 22:35:17,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-05 22:35:17,164 INFO L87 Difference]: Start difference. First operand 122 states and 334 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:35:17,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:17,342 INFO L93 Difference]: Finished difference Result 231 states and 577 transitions. [2021-10-05 22:35:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 22:35:17,342 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 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 22:35:17,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:17,345 INFO L225 Difference]: With dead ends: 231 [2021-10-05 22:35:17,345 INFO L226 Difference]: Without dead ends: 216 [2021-10-05 22:35:17,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-05 22:35:17,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-10-05 22:35:17,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 152. [2021-10-05 22:35:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.80794701986755) internal successors, (424), 151 states have internal predecessors, (424), 0 states have call successors, (0), 0 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 22:35:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 424 transitions. [2021-10-05 22:35:17,355 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 424 transitions. Word has length 15 [2021-10-05 22:35:17,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:17,356 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 424 transitions. [2021-10-05 22:35:17,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:35:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 424 transitions. [2021-10-05 22:35:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:35:17,358 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:17,358 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:17,396 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 22:35:17,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:17,572 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:17,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:17,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2048745232, now seen corresponding path program 8 times [2021-10-05 22:35:17,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:17,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545142170] [2021-10-05 22:35:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:17,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 22:35:17,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:17,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545142170] [2021-10-05 22:35:17,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545142170] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:17,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268807042] [2021-10-05 22:35:17,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:35:17,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:17,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:17,729 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 22:35:17,736 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 22:35:17,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:35:17,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:35:17,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 22:35:17,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:18,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268807042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:18,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:18,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 11 [2021-10-05 22:35:18,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581853028] [2021-10-05 22:35:18,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 22:35:18,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:18,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 22:35:18,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-05 22:35:18,458 INFO L87 Difference]: Start difference. First operand 152 states and 424 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:35:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:18,742 INFO L93 Difference]: Finished difference Result 188 states and 503 transitions. [2021-10-05 22:35:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 22:35:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:35:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:18,745 INFO L225 Difference]: With dead ends: 188 [2021-10-05 22:35:18,745 INFO L226 Difference]: Without dead ends: 184 [2021-10-05 22:35:18,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-10-05 22:35:18,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-05 22:35:18,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 138. [2021-10-05 22:35:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.6715328467153285) internal successors, (366), 137 states have internal predecessors, (366), 0 states have call successors, (0), 0 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 22:35:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 366 transitions. [2021-10-05 22:35:18,753 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 366 transitions. Word has length 16 [2021-10-05 22:35:18,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:18,753 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 366 transitions. [2021-10-05 22:35:18,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:35:18,753 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 366 transitions. [2021-10-05 22:35:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:35:18,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:18,754 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:18,792 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 22:35:18,968 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,SelfDestructingSolverStorable9 [2021-10-05 22:35:18,969 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2101468748, now seen corresponding path program 9 times [2021-10-05 22:35:18,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:18,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538226641] [2021-10-05 22:35:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:18,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:19,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:19,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538226641] [2021-10-05 22:35:19,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538226641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:19,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159901610] [2021-10-05 22:35:19,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 22:35:19,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:19,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:19,275 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 22:35:19,276 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 22:35:19,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-05 22:35:19,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:35:19,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 22:35:19,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:19,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159901610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:19,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:19,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-10-05 22:35:19,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123409072] [2021-10-05 22:35:19,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 22:35:19,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:19,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 22:35:19,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-05 22:35:19,846 INFO L87 Difference]: Start difference. First operand 138 states and 366 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:35:20,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:20,375 INFO L93 Difference]: Finished difference Result 278 states and 694 transitions. [2021-10-05 22:35:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-05 22:35:20,375 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:35:20,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:20,378 INFO L225 Difference]: With dead ends: 278 [2021-10-05 22:35:20,378 INFO L226 Difference]: Without dead ends: 278 [2021-10-05 22:35:20,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-10-05 22:35:20,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-05 22:35:20,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 154. [2021-10-05 22:35:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.7320261437908497) internal successors, (418), 153 states have internal predecessors, (418), 0 states have call successors, (0), 0 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 22:35:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 418 transitions. [2021-10-05 22:35:20,387 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 418 transitions. Word has length 16 [2021-10-05 22:35:20,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:20,387 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 418 transitions. [2021-10-05 22:35:20,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:35:20,388 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 418 transitions. [2021-10-05 22:35:20,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:35:20,389 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:20,389 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:20,430 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 22:35:20,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:20,603 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:20,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:20,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2116712750, now seen corresponding path program 10 times [2021-10-05 22:35:20,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:20,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610691746] [2021-10-05 22:35:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:20,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 22:35:20,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:20,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610691746] [2021-10-05 22:35:20,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610691746] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:20,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180801276] [2021-10-05 22:35:20,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 22:35:20,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:20,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:20,711 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 22:35:20,726 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 22:35:20,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 22:35:20,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:35:20,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-05 22:35:20,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:21,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180801276] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:21,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:21,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-10-05 22:35:21,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842650019] [2021-10-05 22:35:21,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 22:35:21,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:21,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 22:35:21,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-05 22:35:21,489 INFO L87 Difference]: Start difference. First operand 154 states and 418 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:35:21,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:21,678 INFO L93 Difference]: Finished difference Result 172 states and 446 transitions. [2021-10-05 22:35:21,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 22:35:21,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 22:35:21,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:21,680 INFO L225 Difference]: With dead ends: 172 [2021-10-05 22:35:21,680 INFO L226 Difference]: Without dead ends: 160 [2021-10-05 22:35:21,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-05 22:35:21,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-05 22:35:21,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 100. [2021-10-05 22:35:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.4242424242424243) internal successors, (240), 99 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 22:35:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 240 transitions. [2021-10-05 22:35:21,689 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 240 transitions. Word has length 16 [2021-10-05 22:35:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:21,690 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 240 transitions. [2021-10-05 22:35:21,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 22:35:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 240 transitions. [2021-10-05 22:35:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:35:21,691 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:21,691 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:21,733 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 22:35:21,904 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,SelfDestructingSolverStorable11 [2021-10-05 22:35:21,905 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:21,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1092885905, now seen corresponding path program 11 times [2021-10-05 22:35:21,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:21,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463354384] [2021-10-05 22:35:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:21,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:22,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:22,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463354384] [2021-10-05 22:35:22,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463354384] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:22,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560104941] [2021-10-05 22:35:22,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 22:35:22,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:22,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:22,152 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 22:35:22,166 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 22:35:22,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-05 22:35:22,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:35:22,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-05 22:35:22,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:22,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560104941] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:22,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:22,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-05 22:35:22,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571490238] [2021-10-05 22:35:22,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 22:35:22,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:22,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 22:35:22,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:35:22,723 INFO L87 Difference]: Start difference. First operand 100 states and 240 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:35:22,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:22,885 INFO L93 Difference]: Finished difference Result 139 states and 331 transitions. [2021-10-05 22:35:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 22:35:22,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:35:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:22,887 INFO L225 Difference]: With dead ends: 139 [2021-10-05 22:35:22,888 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 22:35:22,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-05 22:35:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 22:35:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 96. [2021-10-05 22:35:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.431578947368421) internal successors, (231), 95 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 22:35:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 231 transitions. [2021-10-05 22:35:22,894 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 231 transitions. Word has length 17 [2021-10-05 22:35:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:22,894 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 231 transitions. [2021-10-05 22:35:22,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:35:22,895 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 231 transitions. [2021-10-05 22:35:22,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:35:22,896 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:22,896 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:22,939 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 22:35:23,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:23,110 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:23,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:23,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1886415829, now seen corresponding path program 12 times [2021-10-05 22:35:23,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:23,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567240533] [2021-10-05 22:35:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:23,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:23,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:23,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567240533] [2021-10-05 22:35:23,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567240533] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:23,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091026891] [2021-10-05 22:35:23,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 22:35:23,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:23,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:23,650 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 22:35:23,651 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 22:35:23,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-05 22:35:23,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:35:23,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-05 22:35:23,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:24,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091026891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:24,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:24,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-05 22:35:24,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554502653] [2021-10-05 22:35:24,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 22:35:24,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:24,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 22:35:24,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-05 22:35:24,314 INFO L87 Difference]: Start difference. First operand 96 states and 231 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:35:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:25,127 INFO L93 Difference]: Finished difference Result 209 states and 489 transitions. [2021-10-05 22:35:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 22:35:25,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:35:25,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:25,131 INFO L225 Difference]: With dead ends: 209 [2021-10-05 22:35:25,131 INFO L226 Difference]: Without dead ends: 196 [2021-10-05 22:35:25,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 818.9ms TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-10-05 22:35:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-05 22:35:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 100. [2021-10-05 22:35:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.4545454545454546) internal successors, (243), 99 states have internal predecessors, (243), 0 states have call successors, (0), 0 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 22:35:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 243 transitions. [2021-10-05 22:35:25,146 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 243 transitions. Word has length 17 [2021-10-05 22:35:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:25,146 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 243 transitions. [2021-10-05 22:35:25,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:35:25,147 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 243 transitions. [2021-10-05 22:35:25,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 22:35:25,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:25,148 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:25,173 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 22:35:25,357 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,SelfDestructingSolverStorable13 [2021-10-05 22:35:25,358 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 22:35:25,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:25,359 INFO L82 PathProgramCache]: Analyzing trace with hash -259754931, now seen corresponding path program 13 times [2021-10-05 22:35:25,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:25,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294632935] [2021-10-05 22:35:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:25,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:25,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:25,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294632935] [2021-10-05 22:35:25,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294632935] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:25,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530879962] [2021-10-05 22:35:25,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 22:35:25,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:25,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:25,663 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 22:35:25,668 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 22:35:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:25,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-05 22:35:25,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:26,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530879962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:26,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:26,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-05 22:35:26,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051357419] [2021-10-05 22:35:26,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 22:35:26,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:26,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 22:35:26,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-10-05 22:35:26,431 INFO L87 Difference]: Start difference. First operand 100 states and 243 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:35:26,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:26,734 INFO L93 Difference]: Finished difference Result 127 states and 311 transitions. [2021-10-05 22:35:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 22:35:26,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 22:35:26,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:26,737 INFO L225 Difference]: With dead ends: 127 [2021-10-05 22:35:26,737 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 22:35:26,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-10-05 22:35:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 22:35:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 22:35:26,741 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 22:35:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 22:35:26,742 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-10-05 22:35:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:26,742 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 22:35:26,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 22:35:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 22:35:26,742 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 22:35:26,747 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 22:35:26,749 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 22:35:26,750 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 22:35:26,781 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 22:35:26,961 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,SelfDestructingSolverStorable14 [2021-10-05 22:35:26,968 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 22:35:26,968 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 22:35:26,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 10:35:26 BasicIcfg [2021-10-05 22:35:26,970 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 22:35:26,971 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 22:35:26,971 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 22:35:26,971 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 22:35:26,971 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:35:04" (3/4) ... [2021-10-05 22:35:26,975 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 22:35:26,982 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 22:35:26,983 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 22:35:26,988 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-05 22:35:26,989 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-05 22:35:26,989 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 22:35:26,989 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 22:35:27,032 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 22:35:27,033 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 22:35:27,035 INFO L168 Benchmark]: Toolchain (without parser) took 23681.73 ms. Allocated memory was 54.5 MB in the beginning and 174.1 MB in the end (delta: 119.5 MB). Free memory was 31.2 MB in the beginning and 118.1 MB in the end (delta: -86.9 MB). Peak memory consumption was 35.6 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:27,035 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 54.5 MB. Free memory is still 36.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 22:35:27,036 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.44 ms. Allocated memory is still 54.5 MB. Free memory was 30.9 MB in the beginning and 37.6 MB in the end (delta: -6.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:27,037 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.83 ms. Allocated memory is still 54.5 MB. Free memory was 37.6 MB in the beginning and 36.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:27,037 INFO L168 Benchmark]: Boogie Preprocessor took 31.94 ms. Allocated memory is still 54.5 MB. Free memory was 36.1 MB in the beginning and 35.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:27,037 INFO L168 Benchmark]: RCFGBuilder took 459.38 ms. Allocated memory is still 54.5 MB. Free memory was 34.8 MB in the beginning and 37.7 MB in the end (delta: -2.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:27,038 INFO L168 Benchmark]: TraceAbstraction took 22776.40 ms. Allocated memory was 54.5 MB in the beginning and 174.1 MB in the end (delta: 119.5 MB). Free memory was 37.3 MB in the beginning and 121.1 MB in the end (delta: -83.9 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:27,038 INFO L168 Benchmark]: Witness Printer took 62.05 ms. Allocated memory is still 174.1 MB. Free memory was 121.1 MB in the beginning and 118.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:27,043 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 54.5 MB. Free memory is still 36.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 295.44 ms. Allocated memory is still 54.5 MB. Free memory was 30.9 MB in the beginning and 37.6 MB in the end (delta: -6.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.83 ms. Allocated memory is still 54.5 MB. Free memory was 37.6 MB in the beginning and 36.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.94 ms. Allocated memory is still 54.5 MB. Free memory was 36.1 MB in the beginning and 35.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 459.38 ms. Allocated memory is still 54.5 MB. Free memory was 34.8 MB in the beginning and 37.7 MB in the end (delta: -2.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22776.40 ms. Allocated memory was 54.5 MB in the beginning and 174.1 MB in the end (delta: 119.5 MB). Free memory was 37.3 MB in the beginning and 121.1 MB in the end (delta: -83.9 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. * Witness Printer took 62.05 ms. Allocated memory is still 174.1 MB. Free memory was 121.1 MB in the beginning and 118.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3781.2ms, 82 PlacesBefore, 21 PlacesAfterwards, 86 TransitionsBefore, 16 TransitionsAfterwards, 1088 CoEnabledTransitionPairs, 5 FixpointIterations, 34 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 9 ChoiceCompositions, 81 TotalNumberOfCompositions, 1023 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1023, positive: 1023, positive conditional: 0, positive unconditional: 1023, 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: 768, positive: 768, positive conditional: 0, positive unconditional: 768, 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: 768, positive: 757, positive conditional: 0, positive unconditional: 757, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 11, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 99, positive: 99, positive conditional: 0, positive unconditional: 99, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1023, positive: 255, positive conditional: 0, positive unconditional: 255, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 768, unknown conditional: 0, unknown unconditional: 768] , Statistics on independence cache: Total cache size (in pairs): 18, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, 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: 97]: 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, 104 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 22564.0ms, OverallIterations: 15, TraceHistogramMax: 4, EmptinessCheckTime: 29.5ms, AutomataDifference: 4229.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3852.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 268 SDtfs, 982 SDslu, 1369 SDs, 0 SdLazy, 1071 SolverSat, 299 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1330.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 339 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 3997.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=11, InterpolantAutomatonStates: 161, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 183.8ms AutomataMinimizationTime, 15 MinimizatonAttempts, 624 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 138.2ms SsaConstructionTime, 1190.0ms SatisfiabilityAnalysisTime, 8304.7ms InterpolantComputationTime, 425 NumberOfCodeBlocks, 425 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 397 ConstructedInterpolants, 0 QuantifiedInterpolants, 4546 SizeOfPredicates, 55 NumberOfNonLiveVariables, 1311 ConjunctsInSsa, 227 ConjunctsInUnsatCore, 28 InterpolantComputations, 2 PerfectInterpolantSequences, 20/205 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 22:35:27,067 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...