./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/mult-comm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:43:04,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:43:04,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:43:04,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:43:04,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:43:04,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:43:04,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:43:04,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:43:04,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:43:04,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:43:04,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:43:04,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:43:04,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:43:04,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:43:04,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:43:04,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:43:04,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:43:04,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:43:04,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:43:04,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:43:04,336 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:43:04,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:43:04,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:43:04,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:43:04,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:43:04,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:43:04,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:43:04,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:43:04,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:43:04,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:43:04,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:43:04,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:43:04,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:43:04,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:43:04,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:43:04,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:43:04,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:43:04,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:43:04,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:43:04,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:43:04,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:43:04,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:43:04,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:43:04,388 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:43:04,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:43:04,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:43:04,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:43:04,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:43:04,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:43:04,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:43:04,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:43:04,391 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:43:04,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:43:04,392 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:43:04,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:43:04,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:43:04,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:43:04,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:43:04,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:43:04,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:43:04,394 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:43:04,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:43:04,395 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:43:04,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:43:04,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:43:04,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:43:04,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:43:04,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:43:04,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:43:04,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:43:04,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:43:04,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:43:04,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:43:04,397 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:43:04,397 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:43:04,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:43:04,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e [2022-07-22 21:43:04,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:43:04,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:43:04,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:43:04,678 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:43:04,679 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:43:04,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-07-22 21:43:04,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40a9545a8/c8cbb6a3af4b419184073365448af7a9/FLAG5559f6f58 [2022-07-22 21:43:05,172 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:43:05,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-07-22 21:43:05,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40a9545a8/c8cbb6a3af4b419184073365448af7a9/FLAG5559f6f58 [2022-07-22 21:43:05,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40a9545a8/c8cbb6a3af4b419184073365448af7a9 [2022-07-22 21:43:05,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:43:05,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:43:05,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:43:05,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:43:05,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:43:05,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:43:05" (1/1) ... [2022-07-22 21:43:05,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ccc72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:05, skipping insertion in model container [2022-07-22 21:43:05,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:43:05" (1/1) ... [2022-07-22 21:43:05,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:43:05,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:43:05,748 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2022-07-22 21:43:05,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:43:05,761 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:43:05,776 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2022-07-22 21:43:05,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:43:05,788 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:43:05,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:05 WrapperNode [2022-07-22 21:43:05,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:43:05,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:43:05,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:43:05,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:43:05,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:05" (1/1) ... [2022-07-22 21:43:05,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:05" (1/1) ... [2022-07-22 21:43:05,827 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-07-22 21:43:05,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:43:05,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:43:05,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:43:05,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:43:05,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:05" (1/1) ... [2022-07-22 21:43:05,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:05" (1/1) ... [2022-07-22 21:43:05,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:05" (1/1) ... [2022-07-22 21:43:05,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:05" (1/1) ... [2022-07-22 21:43:05,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:05" (1/1) ... [2022-07-22 21:43:05,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:05" (1/1) ... [2022-07-22 21:43:05,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:05" (1/1) ... [2022-07-22 21:43:05,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:43:05,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:43:05,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:43:05,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:43:05,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:05" (1/1) ... [2022-07-22 21:43:05,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:43:05,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:05,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:43:05,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:43:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:43:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:43:05,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:43:05,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:43:05,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:43:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:43:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:43:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:43:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:43:05,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:43:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:43:05,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:43:05,944 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:43:06,067 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:43:06,069 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:43:06,292 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:43:06,307 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:43:06,308 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:43:06,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:43:06 BoogieIcfgContainer [2022-07-22 21:43:06,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:43:06,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:43:06,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:43:06,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:43:06,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:43:05" (1/3) ... [2022-07-22 21:43:06,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5d4689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:43:06, skipping insertion in model container [2022-07-22 21:43:06,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:05" (2/3) ... [2022-07-22 21:43:06,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5d4689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:43:06, skipping insertion in model container [2022-07-22 21:43:06,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:43:06" (3/3) ... [2022-07-22 21:43:06,321 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2022-07-22 21:43:06,327 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:43:06,335 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:43:06,335 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:43:06,336 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:43:06,429 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:43:06,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 176 flow [2022-07-22 21:43:06,536 INFO L129 PetriNetUnfolder]: 5/78 cut-off events. [2022-07-22 21:43:06,538 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:43:06,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2022-07-22 21:43:06,541 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 176 flow [2022-07-22 21:43:06,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 150 flow [2022-07-22 21:43:06,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:43:06,571 INFO L357 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, mAutomataTypeConcurrency=PETRI_NET, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1b34a913, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3577776b [2022-07-22 21:43:06,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:43:06,607 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-07-22 21:43:06,609 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:43:06,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:06,610 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:06,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:06,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:06,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1905633102, now seen corresponding path program 1 times [2022-07-22 21:43:06,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:06,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270030079] [2022-07-22 21:43:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:06,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:06,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:06,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270030079] [2022-07-22 21:43:06,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270030079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:43:06,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:43:06,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:43:06,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149367722] [2022-07-22 21:43:06,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:06,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:43:06,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:43:06,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:43:06,848 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 80 [2022-07-22 21:43:06,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:06,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:06,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 80 [2022-07-22 21:43:06,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:06,891 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2022-07-22 21:43:06,891 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:43:06,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 66 events. 2/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 5/68 useless extension candidates. Maximal degree in co-relation 43. Up to 5 conditions per place. [2022-07-22 21:43:06,894 INFO L132 encePairwiseOnDemand]: 77/80 looper letters, 4 selfloop transitions, 0 changer transitions 1/66 dead transitions. [2022-07-22 21:43:06,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2022-07-22 21:43:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:43:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:43:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 151 transitions. [2022-07-22 21:43:06,910 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.94375 [2022-07-22 21:43:06,911 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 151 transitions. [2022-07-22 21:43:06,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 151 transitions. [2022-07-22 21:43:06,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:06,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 151 transitions. [2022-07-22 21:43:06,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:06,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 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) [2022-07-22 21:43:06,929 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 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) [2022-07-22 21:43:06,931 INFO L186 Difference]: Start difference. First operand has 71 places, 69 transitions, 150 flow. Second operand 2 states and 151 transitions. [2022-07-22 21:43:06,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2022-07-22 21:43:06,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:43:06,942 INFO L242 Difference]: Finished difference. Result has 68 places, 65 transitions, 134 flow [2022-07-22 21:43:06,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2022-07-22 21:43:06,948 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-07-22 21:43:06,948 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 134 flow [2022-07-22 21:43:06,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:06,948 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:06,949 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:06,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:43:06,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:06,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1061161231, now seen corresponding path program 1 times [2022-07-22 21:43:06,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:06,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273905197] [2022-07-22 21:43:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:06,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:07,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:07,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273905197] [2022-07-22 21:43:07,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273905197] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:43:07,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:43:07,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:43:07,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121714091] [2022-07-22 21:43:07,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:07,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:43:07,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:07,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:43:07,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:43:07,267 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 80 [2022-07-22 21:43:07,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:07,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:07,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 80 [2022-07-22 21:43:07,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:07,374 INFO L129 PetriNetUnfolder]: 12/131 cut-off events. [2022-07-22 21:43:07,376 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:43:07,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 131 events. 12/131 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 309 event pairs, 1 based on Foata normal form. 1/125 useless extension candidates. Maximal degree in co-relation 171. Up to 19 conditions per place. [2022-07-22 21:43:07,377 INFO L132 encePairwiseOnDemand]: 73/80 looper letters, 19 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-07-22 21:43:07,378 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 227 flow [2022-07-22 21:43:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:43:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:43:07,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 407 transitions. [2022-07-22 21:43:07,383 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8479166666666667 [2022-07-22 21:43:07,384 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 407 transitions. [2022-07-22 21:43:07,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 407 transitions. [2022-07-22 21:43:07,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:07,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 407 transitions. [2022-07-22 21:43:07,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:07,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:07,389 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:07,389 INFO L186 Difference]: Start difference. First operand has 68 places, 65 transitions, 134 flow. Second operand 6 states and 407 transitions. [2022-07-22 21:43:07,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 227 flow [2022-07-22 21:43:07,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:43:07,392 INFO L242 Difference]: Finished difference. Result has 75 places, 68 transitions, 163 flow [2022-07-22 21:43:07,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-07-22 21:43:07,393 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-07-22 21:43:07,394 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 163 flow [2022-07-22 21:43:07,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:07,394 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:07,395 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:07,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:43:07,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:07,397 INFO L85 PathProgramCache]: Analyzing trace with hash -919337767, now seen corresponding path program 1 times [2022-07-22 21:43:07,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:07,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299359493] [2022-07-22 21:43:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:07,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:07,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:07,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299359493] [2022-07-22 21:43:07,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299359493] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:07,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287634417] [2022-07-22 21:43:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:07,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:07,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:07,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:07,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:43:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:07,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 21:43:07,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:08,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:08,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287634417] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:08,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:43:08,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 17 [2022-07-22 21:43:08,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102034389] [2022-07-22 21:43:08,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:08,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:43:08,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:08,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:43:08,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 21:43:08,451 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-22 21:43:08,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 163 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:08,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:08,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-22 21:43:08,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:08,704 INFO L129 PetriNetUnfolder]: 121/397 cut-off events. [2022-07-22 21:43:08,704 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-22 21:43:08,708 INFO L84 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 397 events. 121/397 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1906 event pairs, 19 based on Foata normal form. 1/342 useless extension candidates. Maximal degree in co-relation 739. Up to 64 conditions per place. [2022-07-22 21:43:08,711 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 63 selfloop transitions, 16 changer transitions 7/127 dead transitions. [2022-07-22 21:43:08,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 127 transitions, 492 flow [2022-07-22 21:43:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:43:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:43:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 597 transitions. [2022-07-22 21:43:08,718 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.74625 [2022-07-22 21:43:08,718 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 597 transitions. [2022-07-22 21:43:08,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 597 transitions. [2022-07-22 21:43:08,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:08,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 597 transitions. [2022-07-22 21:43:08,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.7) internal successors, (597), 10 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:08,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:08,725 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:08,725 INFO L186 Difference]: Start difference. First operand has 75 places, 68 transitions, 163 flow. Second operand 10 states and 597 transitions. [2022-07-22 21:43:08,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 127 transitions, 492 flow [2022-07-22 21:43:08,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 478 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-07-22 21:43:08,732 INFO L242 Difference]: Finished difference. Result has 85 places, 79 transitions, 256 flow [2022-07-22 21:43:08,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=256, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2022-07-22 21:43:08,734 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2022-07-22 21:43:08,734 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 256 flow [2022-07-22 21:43:08,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:08,735 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:08,735 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:08,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 21:43:08,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:08,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:08,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:08,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1709159913, now seen corresponding path program 1 times [2022-07-22 21:43:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:08,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146971884] [2022-07-22 21:43:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:08,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:09,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:09,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146971884] [2022-07-22 21:43:09,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146971884] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:09,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979739740] [2022-07-22 21:43:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:09,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:09,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:09,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:09,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:43:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:09,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:43:09,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:09,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:09,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979739740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:09,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:09,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 13 [2022-07-22 21:43:09,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022178284] [2022-07-22 21:43:09,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:09,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 21:43:09,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:09,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 21:43:09,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:43:09,856 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-07-22 21:43:09,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 256 flow. Second operand has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:09,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:09,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-07-22 21:43:09,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:10,510 INFO L129 PetriNetUnfolder]: 44/267 cut-off events. [2022-07-22 21:43:10,510 INFO L130 PetriNetUnfolder]: For 146/166 co-relation queries the response was YES. [2022-07-22 21:43:10,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 267 events. 44/267 cut-off events. For 146/166 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1173 event pairs, 10 based on Foata normal form. 8/257 useless extension candidates. Maximal degree in co-relation 553. Up to 76 conditions per place. [2022-07-22 21:43:10,513 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 30 selfloop transitions, 10 changer transitions 11/103 dead transitions. [2022-07-22 21:43:10,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 103 transitions, 443 flow [2022-07-22 21:43:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:43:10,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:43:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 608 transitions. [2022-07-22 21:43:10,515 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.76 [2022-07-22 21:43:10,515 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 608 transitions. [2022-07-22 21:43:10,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 608 transitions. [2022-07-22 21:43:10,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:10,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 608 transitions. [2022-07-22 21:43:10,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.8) internal successors, (608), 10 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:10,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:10,520 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:10,520 INFO L186 Difference]: Start difference. First operand has 85 places, 79 transitions, 256 flow. Second operand 10 states and 608 transitions. [2022-07-22 21:43:10,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 103 transitions, 443 flow [2022-07-22 21:43:10,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 411 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-07-22 21:43:10,525 INFO L242 Difference]: Finished difference. Result has 93 places, 81 transitions, 281 flow [2022-07-22 21:43:10,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=281, PETRI_PLACES=93, PETRI_TRANSITIONS=81} [2022-07-22 21:43:10,526 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 22 predicate places. [2022-07-22 21:43:10,526 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 81 transitions, 281 flow [2022-07-22 21:43:10,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:10,527 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:10,527 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:10,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:43:10,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 21:43:10,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:10,741 INFO L85 PathProgramCache]: Analyzing trace with hash -446523295, now seen corresponding path program 2 times [2022-07-22 21:43:10,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:10,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384382122] [2022-07-22 21:43:10,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:10,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:10,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:10,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384382122] [2022-07-22 21:43:10,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384382122] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:10,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76743122] [2022-07-22 21:43:10,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:43:10,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:10,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:10,958 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:10,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:43:11,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:43:11,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:11,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 21:43:11,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:11,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:11,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76743122] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:11,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:11,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 16 [2022-07-22 21:43:11,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038709227] [2022-07-22 21:43:11,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:11,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:43:11,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:11,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:43:11,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:43:11,546 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-22 21:43:11,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 81 transitions, 281 flow. Second operand has 16 states, 16 states have (on average 53.875) internal successors, (862), 16 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:11,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:11,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-22 21:43:11,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:12,054 INFO L129 PetriNetUnfolder]: 154/573 cut-off events. [2022-07-22 21:43:12,054 INFO L130 PetriNetUnfolder]: For 395/395 co-relation queries the response was YES. [2022-07-22 21:43:12,056 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 573 events. 154/573 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3230 event pairs, 45 based on Foata normal form. 3/572 useless extension candidates. Maximal degree in co-relation 1347. Up to 160 conditions per place. [2022-07-22 21:43:12,059 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 78 selfloop transitions, 30 changer transitions 18/167 dead transitions. [2022-07-22 21:43:12,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 167 transitions, 875 flow [2022-07-22 21:43:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 21:43:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-22 21:43:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1089 transitions. [2022-07-22 21:43:12,063 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7164473684210526 [2022-07-22 21:43:12,063 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1089 transitions. [2022-07-22 21:43:12,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1089 transitions. [2022-07-22 21:43:12,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:12,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1089 transitions. [2022-07-22 21:43:12,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 57.31578947368421) internal successors, (1089), 19 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:12,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:12,070 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:12,070 INFO L186 Difference]: Start difference. First operand has 93 places, 81 transitions, 281 flow. Second operand 19 states and 1089 transitions. [2022-07-22 21:43:12,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 167 transitions, 875 flow [2022-07-22 21:43:12,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 812 flow, removed 25 selfloop flow, removed 6 redundant places. [2022-07-22 21:43:12,077 INFO L242 Difference]: Finished difference. Result has 113 places, 97 transitions, 492 flow [2022-07-22 21:43:12,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=492, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2022-07-22 21:43:12,079 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 42 predicate places. [2022-07-22 21:43:12,079 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 492 flow [2022-07-22 21:43:12,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 53.875) internal successors, (862), 16 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:12,079 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:12,080 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:12,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:43:12,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:12,296 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:12,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:12,296 INFO L85 PathProgramCache]: Analyzing trace with hash -652524683, now seen corresponding path program 3 times [2022-07-22 21:43:12,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:12,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081065073] [2022-07-22 21:43:12,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:12,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:12,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:12,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081065073] [2022-07-22 21:43:12,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081065073] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:12,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700206158] [2022-07-22 21:43:12,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:43:12,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:12,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:12,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:12,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:43:12,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:43:12,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:12,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 21:43:12,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:12,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:12,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700206158] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:12,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:43:12,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 15 [2022-07-22 21:43:12,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360462202] [2022-07-22 21:43:12,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:12,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:43:12,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:12,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:43:12,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:43:12,977 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-22 21:43:12,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 492 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:12,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:12,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-22 21:43:12,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:13,433 INFO L129 PetriNetUnfolder]: 154/587 cut-off events. [2022-07-22 21:43:13,433 INFO L130 PetriNetUnfolder]: For 977/977 co-relation queries the response was YES. [2022-07-22 21:43:13,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1646 conditions, 587 events. 154/587 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3314 event pairs, 60 based on Foata normal form. 3/581 useless extension candidates. Maximal degree in co-relation 1623. Up to 267 conditions per place. [2022-07-22 21:43:13,438 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 58 selfloop transitions, 12 changer transitions 15/126 dead transitions. [2022-07-22 21:43:13,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 819 flow [2022-07-22 21:43:13,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:43:13,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:43:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2022-07-22 21:43:13,440 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2022-07-22 21:43:13,440 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 520 transitions. [2022-07-22 21:43:13,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 520 transitions. [2022-07-22 21:43:13,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:13,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 520 transitions. [2022-07-22 21:43:13,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.77777777777778) internal successors, (520), 9 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:13,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:13,444 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:13,444 INFO L186 Difference]: Start difference. First operand has 113 places, 97 transitions, 492 flow. Second operand 9 states and 520 transitions. [2022-07-22 21:43:13,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 819 flow [2022-07-22 21:43:13,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 126 transitions, 706 flow, removed 35 selfloop flow, removed 12 redundant places. [2022-07-22 21:43:13,453 INFO L242 Difference]: Finished difference. Result has 107 places, 97 transitions, 445 flow [2022-07-22 21:43:13,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=445, PETRI_PLACES=107, PETRI_TRANSITIONS=97} [2022-07-22 21:43:13,454 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2022-07-22 21:43:13,454 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 97 transitions, 445 flow [2022-07-22 21:43:13,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:13,454 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:13,455 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:13,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:43:13,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:13,672 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -662099525, now seen corresponding path program 2 times [2022-07-22 21:43:13,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:13,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601994614] [2022-07-22 21:43:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:13,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:13,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:13,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601994614] [2022-07-22 21:43:13,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601994614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:13,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032034489] [2022-07-22 21:43:13,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:43:13,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:13,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:13,820 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:13,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:43:13,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:43:13,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:13,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:43:13,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:14,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:14,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032034489] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:14,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:14,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-07-22 21:43:14,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597992387] [2022-07-22 21:43:14,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:14,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:43:14,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:14,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:43:14,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:43:14,443 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-07-22 21:43:14,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 97 transitions, 445 flow. Second operand has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:14,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:14,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-07-22 21:43:14,444 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:14,939 INFO L129 PetriNetUnfolder]: 77/445 cut-off events. [2022-07-22 21:43:14,940 INFO L130 PetriNetUnfolder]: For 583/620 co-relation queries the response was YES. [2022-07-22 21:43:14,941 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 445 events. 77/445 cut-off events. For 583/620 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2365 event pairs, 7 based on Foata normal form. 16/452 useless extension candidates. Maximal degree in co-relation 1076. Up to 134 conditions per place. [2022-07-22 21:43:14,943 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 44 selfloop transitions, 38 changer transitions 12/150 dead transitions. [2022-07-22 21:43:14,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 150 transitions, 899 flow [2022-07-22 21:43:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 21:43:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-22 21:43:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1026 transitions. [2022-07-22 21:43:14,947 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7544117647058823 [2022-07-22 21:43:14,947 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1026 transitions. [2022-07-22 21:43:14,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1026 transitions. [2022-07-22 21:43:14,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:14,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1026 transitions. [2022-07-22 21:43:14,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.35294117647059) internal successors, (1026), 17 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:14,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:14,952 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:14,953 INFO L186 Difference]: Start difference. First operand has 107 places, 97 transitions, 445 flow. Second operand 17 states and 1026 transitions. [2022-07-22 21:43:14,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 150 transitions, 899 flow [2022-07-22 21:43:14,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 150 transitions, 841 flow, removed 16 selfloop flow, removed 7 redundant places. [2022-07-22 21:43:14,959 INFO L242 Difference]: Finished difference. Result has 127 places, 117 transitions, 717 flow [2022-07-22 21:43:14,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=717, PETRI_PLACES=127, PETRI_TRANSITIONS=117} [2022-07-22 21:43:14,960 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 56 predicate places. [2022-07-22 21:43:14,960 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 117 transitions, 717 flow [2022-07-22 21:43:14,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:14,961 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:14,961 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:14,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:43:15,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:15,176 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:15,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:15,176 INFO L85 PathProgramCache]: Analyzing trace with hash 119757859, now seen corresponding path program 3 times [2022-07-22 21:43:15,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:15,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062682298] [2022-07-22 21:43:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:15,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:15,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:15,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062682298] [2022-07-22 21:43:15,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062682298] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:15,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708038115] [2022-07-22 21:43:15,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:43:15,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:15,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:15,324 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:15,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:43:15,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:43:15,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:15,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 21:43:15,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:15,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:43:15,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708038115] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:15,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:43:15,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 15 [2022-07-22 21:43:15,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425220325] [2022-07-22 21:43:15,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:15,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:43:15,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:15,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:43:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:43:15,868 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-07-22 21:43:15,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 117 transitions, 717 flow. Second operand has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:15,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:15,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-07-22 21:43:15,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:16,061 INFO L129 PetriNetUnfolder]: 84/467 cut-off events. [2022-07-22 21:43:16,061 INFO L130 PetriNetUnfolder]: For 1071/1135 co-relation queries the response was YES. [2022-07-22 21:43:16,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1371 conditions, 467 events. 84/467 cut-off events. For 1071/1135 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2620 event pairs, 11 based on Foata normal form. 24/483 useless extension candidates. Maximal degree in co-relation 1342. Up to 132 conditions per place. [2022-07-22 21:43:16,066 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 41 selfloop transitions, 42 changer transitions 4/143 dead transitions. [2022-07-22 21:43:16,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 143 transitions, 1076 flow [2022-07-22 21:43:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:43:16,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:43:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 608 transitions. [2022-07-22 21:43:16,069 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.76 [2022-07-22 21:43:16,069 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 608 transitions. [2022-07-22 21:43:16,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 608 transitions. [2022-07-22 21:43:16,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:16,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 608 transitions. [2022-07-22 21:43:16,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.8) internal successors, (608), 10 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:16,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:16,073 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:16,073 INFO L186 Difference]: Start difference. First operand has 127 places, 117 transitions, 717 flow. Second operand 10 states and 608 transitions. [2022-07-22 21:43:16,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 143 transitions, 1076 flow [2022-07-22 21:43:16,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 143 transitions, 1033 flow, removed 17 selfloop flow, removed 8 redundant places. [2022-07-22 21:43:16,082 INFO L242 Difference]: Finished difference. Result has 127 places, 128 transitions, 915 flow [2022-07-22 21:43:16,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=915, PETRI_PLACES=127, PETRI_TRANSITIONS=128} [2022-07-22 21:43:16,085 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 56 predicate places. [2022-07-22 21:43:16,085 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 128 transitions, 915 flow [2022-07-22 21:43:16,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:16,086 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:16,086 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:16,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:43:16,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:16,299 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:16,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash 168630357, now seen corresponding path program 4 times [2022-07-22 21:43:16,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:16,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139974994] [2022-07-22 21:43:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:16,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:16,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:16,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139974994] [2022-07-22 21:43:16,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139974994] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:16,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673586920] [2022-07-22 21:43:16,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:43:16,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:16,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:16,512 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:16,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:43:16,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:43:16,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:16,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 21:43:16,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:16,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:17,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673586920] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:17,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:17,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-07-22 21:43:17,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140578463] [2022-07-22 21:43:17,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:17,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:43:17,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:17,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:43:17,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:43:17,160 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-22 21:43:17,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 128 transitions, 915 flow. Second operand has 19 states, 19 states have (on average 53.89473684210526) internal successors, (1024), 19 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:17,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:17,162 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-22 21:43:17,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:17,950 INFO L129 PetriNetUnfolder]: 278/1002 cut-off events. [2022-07-22 21:43:17,950 INFO L130 PetriNetUnfolder]: For 2840/2840 co-relation queries the response was YES. [2022-07-22 21:43:17,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 1002 events. 278/1002 cut-off events. For 2840/2840 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6937 event pairs, 63 based on Foata normal form. 3/995 useless extension candidates. Maximal degree in co-relation 3232. Up to 166 conditions per place. [2022-07-22 21:43:17,960 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 108 selfloop transitions, 69 changer transitions 40/258 dead transitions. [2022-07-22 21:43:17,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 258 transitions, 2191 flow [2022-07-22 21:43:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 21:43:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-22 21:43:17,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1547 transitions. [2022-07-22 21:43:17,965 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7162037037037037 [2022-07-22 21:43:17,965 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1547 transitions. [2022-07-22 21:43:17,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1547 transitions. [2022-07-22 21:43:17,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:17,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1547 transitions. [2022-07-22 21:43:17,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 57.2962962962963) internal successors, (1547), 27 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:17,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 80.0) internal successors, (2240), 28 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:17,975 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 80.0) internal successors, (2240), 28 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:17,975 INFO L186 Difference]: Start difference. First operand has 127 places, 128 transitions, 915 flow. Second operand 27 states and 1547 transitions. [2022-07-22 21:43:17,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 258 transitions, 2191 flow [2022-07-22 21:43:17,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 258 transitions, 2054 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-07-22 21:43:17,994 INFO L242 Difference]: Finished difference. Result has 156 places, 143 transitions, 1213 flow [2022-07-22 21:43:17,994 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1213, PETRI_PLACES=156, PETRI_TRANSITIONS=143} [2022-07-22 21:43:17,995 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 85 predicate places. [2022-07-22 21:43:17,996 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 143 transitions, 1213 flow [2022-07-22 21:43:17,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 53.89473684210526) internal successors, (1024), 19 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:17,996 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:17,996 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:18,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:43:18,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:18,205 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:18,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:18,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1423120419, now seen corresponding path program 5 times [2022-07-22 21:43:18,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:18,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484629765] [2022-07-22 21:43:18,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:18,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:18,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:18,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484629765] [2022-07-22 21:43:18,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484629765] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:18,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145340723] [2022-07-22 21:43:18,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:43:18,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:18,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:18,437 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:18,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:43:18,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-22 21:43:18,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:18,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 21:43:18,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:19,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:19,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145340723] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:19,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:19,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-07-22 21:43:19,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436444627] [2022-07-22 21:43:19,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:19,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:43:19,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:19,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:43:19,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:43:19,330 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-22 21:43:19,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 143 transitions, 1213 flow. Second operand has 19 states, 19 states have (on average 53.89473684210526) internal successors, (1024), 19 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:19,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:19,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-22 21:43:19,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:20,399 INFO L129 PetriNetUnfolder]: 278/981 cut-off events. [2022-07-22 21:43:20,399 INFO L130 PetriNetUnfolder]: For 3817/3817 co-relation queries the response was YES. [2022-07-22 21:43:20,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3486 conditions, 981 events. 278/981 cut-off events. For 3817/3817 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6716 event pairs, 57 based on Foata normal form. 2/975 useless extension candidates. Maximal degree in co-relation 3449. Up to 166 conditions per place. [2022-07-22 21:43:20,408 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 113 selfloop transitions, 71 changer transitions 21/246 dead transitions. [2022-07-22 21:43:20,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 246 transitions, 2277 flow [2022-07-22 21:43:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 21:43:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-22 21:43:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1377 transitions. [2022-07-22 21:43:20,411 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7171875 [2022-07-22 21:43:20,411 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1377 transitions. [2022-07-22 21:43:20,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1377 transitions. [2022-07-22 21:43:20,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:20,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1377 transitions. [2022-07-22 21:43:20,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.375) internal successors, (1377), 24 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:20,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 80.0) internal successors, (2000), 25 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:20,418 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 80.0) internal successors, (2000), 25 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:20,418 INFO L186 Difference]: Start difference. First operand has 156 places, 143 transitions, 1213 flow. Second operand 24 states and 1377 transitions. [2022-07-22 21:43:20,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 246 transitions, 2277 flow [2022-07-22 21:43:20,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 246 transitions, 2089 flow, removed 48 selfloop flow, removed 20 redundant places. [2022-07-22 21:43:20,437 INFO L242 Difference]: Finished difference. Result has 159 places, 149 transitions, 1372 flow [2022-07-22 21:43:20,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1372, PETRI_PLACES=159, PETRI_TRANSITIONS=149} [2022-07-22 21:43:20,438 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 88 predicate places. [2022-07-22 21:43:20,438 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 149 transitions, 1372 flow [2022-07-22 21:43:20,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 53.89473684210526) internal successors, (1024), 19 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:43:20,439 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:20,439 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:43:20,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:43:20,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 21:43:20,644 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:43:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:20,645 INFO L85 PathProgramCache]: Analyzing trace with hash -824553335, now seen corresponding path program 1 times [2022-07-22 21:43:20,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:20,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921687579] [2022-07-22 21:43:20,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:20,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:21,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:21,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921687579] [2022-07-22 21:43:21,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921687579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:21,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214250702] [2022-07-22 21:43:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:21,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:21,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:21,340 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:43:21,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:43:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:21,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 21:43:21,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:43:22,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:44:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:16,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214250702] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:44:16,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:44:16,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 37 [2022-07-22 21:44:16,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752208160] [2022-07-22 21:44:16,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:44:16,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-22 21:44:16,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:44:16,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-22 21:44:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 21:44:16,209 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-07-22 21:44:16,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 149 transitions, 1372 flow. Second operand has 37 states, 37 states have (on average 48.7027027027027) internal successors, (1802), 37 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:16,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:44:16,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-07-22 21:44:16,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:44:25,482 INFO L129 PetriNetUnfolder]: 366/1233 cut-off events. [2022-07-22 21:44:25,482 INFO L130 PetriNetUnfolder]: For 5197/5197 co-relation queries the response was YES. [2022-07-22 21:44:25,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4503 conditions, 1233 events. 366/1233 cut-off events. For 5197/5197 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9004 event pairs, 38 based on Foata normal form. 2/1232 useless extension candidates. Maximal degree in co-relation 4465. Up to 242 conditions per place. [2022-07-22 21:44:25,497 INFO L132 encePairwiseOnDemand]: 58/80 looper letters, 131 selfloop transitions, 171 changer transitions 26/365 dead transitions. [2022-07-22 21:44:25,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 365 transitions, 3537 flow [2022-07-22 21:44:25,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 21:44:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-22 21:44:25,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3115 transitions. [2022-07-22 21:44:25,503 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6383196721311475 [2022-07-22 21:44:25,503 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3115 transitions. [2022-07-22 21:44:25,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3115 transitions. [2022-07-22 21:44:25,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:44:25,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3115 transitions. [2022-07-22 21:44:25,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 51.0655737704918) internal successors, (3115), 61 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:25,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 80.0) internal successors, (4960), 62 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:25,523 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 80.0) internal successors, (4960), 62 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:25,523 INFO L186 Difference]: Start difference. First operand has 159 places, 149 transitions, 1372 flow. Second operand 61 states and 3115 transitions. [2022-07-22 21:44:25,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 365 transitions, 3537 flow [2022-07-22 21:44:25,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 365 transitions, 3297 flow, removed 32 selfloop flow, removed 19 redundant places. [2022-07-22 21:44:25,554 INFO L242 Difference]: Finished difference. Result has 227 places, 242 transitions, 2659 flow [2022-07-22 21:44:25,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=2659, PETRI_PLACES=227, PETRI_TRANSITIONS=242} [2022-07-22 21:44:25,555 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 156 predicate places. [2022-07-22 21:44:25,556 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 242 transitions, 2659 flow [2022-07-22 21:44:25,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 48.7027027027027) internal successors, (1802), 37 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:44:25,557 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:44:25,557 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:44:25,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 21:44:25,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:25,763 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:44:25,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:44:25,764 INFO L85 PathProgramCache]: Analyzing trace with hash -538219833, now seen corresponding path program 2 times [2022-07-22 21:44:25,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:44:25,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955468843] [2022-07-22 21:44:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:44:25,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:44:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:44:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:26,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:44:26,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955468843] [2022-07-22 21:44:26,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955468843] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:44:26,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984020692] [2022-07-22 21:44:26,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:44:26,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:44:26,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:44:26,441 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:44:26,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 21:44:26,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:44:26,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:44:26,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 21:44:26,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:44:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:44:27,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:45:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:45:24,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984020692] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:45:24,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:45:24,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-07-22 21:45:24,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923913005] [2022-07-22 21:45:24,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:45:24,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 21:45:24,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:45:24,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 21:45:24,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 21:45:24,125 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-07-22 21:45:24,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 242 transitions, 2659 flow. Second operand has 38 states, 38 states have (on average 48.71052631578947) internal successors, (1851), 38 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:24,127 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:45:24,127 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-07-22 21:45:24,127 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:45:36,836 INFO L129 PetriNetUnfolder]: 511/1670 cut-off events. [2022-07-22 21:45:36,836 INFO L130 PetriNetUnfolder]: For 11150/11150 co-relation queries the response was YES. [2022-07-22 21:45:36,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7842 conditions, 1670 events. 511/1670 cut-off events. For 11150/11150 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13200 event pairs, 40 based on Foata normal form. 1/1667 useless extension candidates. Maximal degree in co-relation 7779. Up to 386 conditions per place. [2022-07-22 21:45:36,861 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 150 selfloop transitions, 336 changer transitions 21/544 dead transitions. [2022-07-22 21:45:36,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 544 transitions, 6773 flow [2022-07-22 21:45:36,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-22 21:45:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-22 21:45:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4445 transitions. [2022-07-22 21:45:36,868 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6386494252873564 [2022-07-22 21:45:36,868 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4445 transitions. [2022-07-22 21:45:36,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4445 transitions. [2022-07-22 21:45:36,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:45:36,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4445 transitions. [2022-07-22 21:45:36,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 51.0919540229885) internal successors, (4445), 87 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:36,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 80.0) internal successors, (7040), 88 states have internal predecessors, (7040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:36,918 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 80.0) internal successors, (7040), 88 states have internal predecessors, (7040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:36,918 INFO L186 Difference]: Start difference. First operand has 227 places, 242 transitions, 2659 flow. Second operand 87 states and 4445 transitions. [2022-07-22 21:45:36,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 544 transitions, 6773 flow [2022-07-22 21:45:36,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 544 transitions, 6178 flow, removed 168 selfloop flow, removed 22 redundant places. [2022-07-22 21:45:36,982 INFO L242 Difference]: Finished difference. Result has 308 places, 421 transitions, 5403 flow [2022-07-22 21:45:36,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=5403, PETRI_PLACES=308, PETRI_TRANSITIONS=421} [2022-07-22 21:45:36,984 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 237 predicate places. [2022-07-22 21:45:36,984 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 421 transitions, 5403 flow [2022-07-22 21:45:36,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.71052631578947) internal successors, (1851), 38 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:45:36,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:45:36,985 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:45:37,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 21:45:37,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 21:45:37,200 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:45:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:45:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1557988399, now seen corresponding path program 3 times [2022-07-22 21:45:37,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:45:37,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722764477] [2022-07-22 21:45:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:45:37,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:45:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:45:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:45:37,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:45:37,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722764477] [2022-07-22 21:45:37,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722764477] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:45:37,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191198822] [2022-07-22 21:45:37,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:45:37,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:45:37,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:45:37,964 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:45:37,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 21:45:38,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:45:38,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:45:38,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 21:45:38,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:45:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:45:38,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:46:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:46:40,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191198822] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:46:40,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:46:40,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-07-22 21:46:40,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463502494] [2022-07-22 21:46:40,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:46:40,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 21:46:40,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:46:40,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 21:46:40,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 21:46:40,415 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-07-22 21:46:40,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 421 transitions, 5403 flow. Second operand has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:46:40,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:46:40,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-07-22 21:46:40,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:47:13,294 INFO L129 PetriNetUnfolder]: 819/2553 cut-off events. [2022-07-22 21:47:13,295 INFO L130 PetriNetUnfolder]: For 24809/24809 co-relation queries the response was YES. [2022-07-22 21:47:13,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14399 conditions, 2553 events. 819/2553 cut-off events. For 24809/24809 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21866 event pairs, 29 based on Foata normal form. 3/2550 useless extension candidates. Maximal degree in co-relation 14321. Up to 442 conditions per place. [2022-07-22 21:47:13,332 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 249 selfloop transitions, 709 changer transitions 37/1032 dead transitions. [2022-07-22 21:47:13,332 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1032 transitions, 15266 flow [2022-07-22 21:47:13,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-07-22 21:47:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2022-07-22 21:47:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 8351 transitions. [2022-07-22 21:47:13,346 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6404141104294478 [2022-07-22 21:47:13,346 INFO L72 ComplementDD]: Start complementDD. Operand 163 states and 8351 transitions. [2022-07-22 21:47:13,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 8351 transitions. [2022-07-22 21:47:13,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:47:13,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 163 states and 8351 transitions. [2022-07-22 21:47:13,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 164 states, 163 states have (on average 51.23312883435583) internal successors, (8351), 163 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:13,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 164 states, 164 states have (on average 80.0) internal successors, (13120), 164 states have internal predecessors, (13120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:13,383 INFO L81 ComplementDD]: Finished complementDD. Result has 164 states, 164 states have (on average 80.0) internal successors, (13120), 164 states have internal predecessors, (13120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:13,383 INFO L186 Difference]: Start difference. First operand has 308 places, 421 transitions, 5403 flow. Second operand 163 states and 8351 transitions. [2022-07-22 21:47:13,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1032 transitions, 15266 flow [2022-07-22 21:47:13,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1032 transitions, 14299 flow, removed 399 selfloop flow, removed 14 redundant places. [2022-07-22 21:47:13,540 INFO L242 Difference]: Finished difference. Result has 496 places, 814 transitions, 12636 flow [2022-07-22 21:47:13,540 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=4892, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=163, PETRI_FLOW=12636, PETRI_PLACES=496, PETRI_TRANSITIONS=814} [2022-07-22 21:47:13,541 INFO L279 CegarLoopForPetriNet]: 71 programPoint places, 425 predicate places. [2022-07-22 21:47:13,541 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 814 transitions, 12636 flow [2022-07-22 21:47:13,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.68421052631579) internal successors, (1850), 38 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:47:13,541 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:47:13,542 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:47:13,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-22 21:47:13,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 21:47:13,742 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:47:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:47:13,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1804492275, now seen corresponding path program 4 times [2022-07-22 21:47:13,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:47:13,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957478529] [2022-07-22 21:47:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:47:13,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:47:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:47:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:47:14,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:47:14,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957478529] [2022-07-22 21:47:14,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957478529] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:47:14,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327259062] [2022-07-22 21:47:14,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:47:14,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:47:14,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:47:14,419 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:47:14,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 21:47:14,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:47:14,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:47:14,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 21:47:14,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:47:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:47:15,443 INFO L328 TraceCheckSpWp]: Computing backward predicates...