./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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-dist.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 c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:28:08,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:28:08,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:28:08,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:28:08,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:28:08,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:28:08,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:28:08,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:28:08,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:28:08,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:28:08,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:28:08,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:28:08,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:28:08,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:28:08,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:28:08,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:28:08,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:28:08,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:28:08,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:28:08,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:28:08,337 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:28:08,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:28:08,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:28:08,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:28:08,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:28:08,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:28:08,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:28:08,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:28:08,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:28:08,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:28:08,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:28:08,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:28:08,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:28:08,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:28:08,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:28:08,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:28:08,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:28:08,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:28:08,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:28:08,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:28:08,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:28:08,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:28:08,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:28:08,389 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:28:08,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:28:08,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:28:08,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:28:08,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:28:08,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:28:08,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:28:08,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:28:08,394 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:28:08,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:28:08,395 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:28:08,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:28:08,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:28:08,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:28:08,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:28:08,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:28:08,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:28:08,397 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:28:08,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:28:08,397 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:28:08,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:28:08,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:28:08,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:28:08,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:28:08,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:28:08,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:28:08,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:28:08,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:28:08,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:28:08,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:28:08,413 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:28:08,413 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:28:08,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:28:08,414 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 [2022-07-19 21:28:08,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:28:08,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:28:08,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:28:08,681 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:28:08,681 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:28:08,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-07-19 21:28:08,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a361cde6e/fee99fcf40574d389f68f38d0dfc4ab4/FLAGe5dd8f3be [2022-07-19 21:28:09,100 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:28:09,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-07-19 21:28:09,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a361cde6e/fee99fcf40574d389f68f38d0dfc4ab4/FLAGe5dd8f3be [2022-07-19 21:28:09,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a361cde6e/fee99fcf40574d389f68f38d0dfc4ab4 [2022-07-19 21:28:09,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:28:09,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:28:09,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:28:09,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:28:09,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:28:09,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:28:09" (1/1) ... [2022-07-19 21:28:09,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ff830ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:09, skipping insertion in model container [2022-07-19 21:28:09,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:28:09" (1/1) ... [2022-07-19 21:28:09,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:28:09,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:28:09,652 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-dist.wvr.c[2116,2129] [2022-07-19 21:28:09,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:28:09,661 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:28:09,679 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-dist.wvr.c[2116,2129] [2022-07-19 21:28:09,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:28:09,694 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:28:09,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:09 WrapperNode [2022-07-19 21:28:09,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:28:09,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:28:09,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:28:09,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:28:09,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:09" (1/1) ... [2022-07-19 21:28:09,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:09" (1/1) ... [2022-07-19 21:28:09,725 INFO L137 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-07-19 21:28:09,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:28:09,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:28:09,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:28:09,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:28:09,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:09" (1/1) ... [2022-07-19 21:28:09,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:09" (1/1) ... [2022-07-19 21:28:09,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:09" (1/1) ... [2022-07-19 21:28:09,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:09" (1/1) ... [2022-07-19 21:28:09,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:09" (1/1) ... [2022-07-19 21:28:09,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:09" (1/1) ... [2022-07-19 21:28:09,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:09" (1/1) ... [2022-07-19 21:28:09,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:28:09,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:28:09,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:28:09,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:28:09,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:09" (1/1) ... [2022-07-19 21:28:09,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:28:09,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:09,773 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) [2022-07-19 21:28:09,786 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 [2022-07-19 21:28:09,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:28:09,806 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:28:09,806 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:28:09,807 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:28:09,807 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:28:09,807 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:28:09,807 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:28:09,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:28:09,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:28:09,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:28:09,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:28:09,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:28:09,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:28:09,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:28:09,812 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:28:09,878 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:28:09,879 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:28:10,087 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:28:10,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:28:10,093 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:28:10,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:28:10 BoogieIcfgContainer [2022-07-19 21:28:10,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:28:10,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:28:10,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:28:10,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:28:10,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:28:09" (1/3) ... [2022-07-19 21:28:10,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdb6b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:28:10, skipping insertion in model container [2022-07-19 21:28:10,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:09" (2/3) ... [2022-07-19 21:28:10,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdb6b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:28:10, skipping insertion in model container [2022-07-19 21:28:10,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:28:10" (3/3) ... [2022-07-19 21:28:10,106 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2022-07-19 21:28:10,110 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:28:10,117 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:28:10,117 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:28:10,117 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:28:10,169 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:28:10,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 238 flow [2022-07-19 21:28:10,272 INFO L129 PetriNetUnfolder]: 7/104 cut-off events. [2022-07-19 21:28:10,273 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:28:10,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 7/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2022-07-19 21:28:10,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 107 transitions, 238 flow [2022-07-19 21:28:10,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 93 transitions, 204 flow [2022-07-19 21:28:10,290 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:28:10,296 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@58da59e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6111c783 [2022-07-19 21:28:10,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:28:10,321 INFO L129 PetriNetUnfolder]: 7/92 cut-off events. [2022-07-19 21:28:10,321 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:28:10,322 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:10,322 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:10,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:28:10,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:10,327 INFO L85 PathProgramCache]: Analyzing trace with hash 10639135, now seen corresponding path program 1 times [2022-07-19 21:28:10,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:10,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135173533] [2022-07-19 21:28:10,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:10,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:10,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:10,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135173533] [2022-07-19 21:28:10,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135173533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:28:10,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:28:10,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:28:10,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610324327] [2022-07-19 21:28:10,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:28:10,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:28:10,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:28:10,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:28:10,552 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 107 [2022-07-19 21:28:10,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:10,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:10,555 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 107 [2022-07-19 21:28:10,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:10,589 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2022-07-19 21:28:10,590 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-19 21:28:10,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 89 events. 3/89 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 10/95 useless extension candidates. Maximal degree in co-relation 66. Up to 7 conditions per place. [2022-07-19 21:28:10,592 INFO L132 encePairwiseOnDemand]: 103/107 looper letters, 6 selfloop transitions, 0 changer transitions 1/89 dead transitions. [2022-07-19 21:28:10,592 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 89 transitions, 208 flow [2022-07-19 21:28:10,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:28:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:28:10,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2022-07-19 21:28:10,603 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9439252336448598 [2022-07-19 21:28:10,604 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2022-07-19 21:28:10,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2022-07-19 21:28:10,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:10,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2022-07-19 21:28:10,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:10,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:10,613 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:10,615 INFO L186 Difference]: Start difference. First operand has 96 places, 93 transitions, 204 flow. Second operand 2 states and 202 transitions. [2022-07-19 21:28:10,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 89 transitions, 208 flow [2022-07-19 21:28:10,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 89 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:28:10,621 INFO L242 Difference]: Finished difference. Result has 91 places, 88 transitions, 182 flow [2022-07-19 21:28:10,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=91, PETRI_TRANSITIONS=88} [2022-07-19 21:28:10,626 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -5 predicate places. [2022-07-19 21:28:10,626 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 182 flow [2022-07-19 21:28:10,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:10,626 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:10,627 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:10,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:28:10,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:28:10,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:10,628 INFO L85 PathProgramCache]: Analyzing trace with hash -489038424, now seen corresponding path program 1 times [2022-07-19 21:28:10,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:10,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500384181] [2022-07-19 21:28:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:10,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:10,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:10,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500384181] [2022-07-19 21:28:10,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500384181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:28:10,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:28:10,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:28:10,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473998868] [2022-07-19 21:28:10,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:28:10,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:28:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:28:10,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:28:10,982 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 107 [2022-07-19 21:28:10,984 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 86.85714285714286) internal successors, (608), 7 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) [2022-07-19 21:28:10,984 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:10,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 107 [2022-07-19 21:28:10,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:11,167 INFO L129 PetriNetUnfolder]: 53/322 cut-off events. [2022-07-19 21:28:11,173 INFO L130 PetriNetUnfolder]: For 22/23 co-relation queries the response was YES. [2022-07-19 21:28:11,175 INFO L84 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 322 events. 53/322 cut-off events. For 22/23 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1277 event pairs, 7 based on Foata normal form. 2/290 useless extension candidates. Maximal degree in co-relation 432. Up to 52 conditions per place. [2022-07-19 21:28:11,177 INFO L132 encePairwiseOnDemand]: 98/107 looper letters, 35 selfloop transitions, 9 changer transitions 4/120 dead transitions. [2022-07-19 21:28:11,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 120 transitions, 354 flow [2022-07-19 21:28:11,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:28:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:28:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 644 transitions. [2022-07-19 21:28:11,185 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8598130841121495 [2022-07-19 21:28:11,185 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 644 transitions. [2022-07-19 21:28:11,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 644 transitions. [2022-07-19 21:28:11,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:11,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 644 transitions. [2022-07-19 21:28:11,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.0) internal successors, (644), 7 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:11,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 107.0) internal successors, (856), 8 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:11,197 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 107.0) internal successors, (856), 8 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:11,197 INFO L186 Difference]: Start difference. First operand has 91 places, 88 transitions, 182 flow. Second operand 7 states and 644 transitions. [2022-07-19 21:28:11,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 120 transitions, 354 flow [2022-07-19 21:28:11,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 120 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:28:11,201 INFO L242 Difference]: Finished difference. Result has 100 places, 94 transitions, 235 flow [2022-07-19 21:28:11,202 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=235, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2022-07-19 21:28:11,203 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 4 predicate places. [2022-07-19 21:28:11,203 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 235 flow [2022-07-19 21:28:11,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.85714285714286) internal successors, (608), 7 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) [2022-07-19 21:28:11,204 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:11,204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:11,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:28:11,205 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:28:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:11,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1351944439, now seen corresponding path program 1 times [2022-07-19 21:28:11,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:11,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205308724] [2022-07-19 21:28:11,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:11,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:11,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:11,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205308724] [2022-07-19 21:28:11,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205308724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:11,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675632710] [2022-07-19 21:28:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:11,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:11,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:11,488 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) [2022-07-19 21:28:11,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:28:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:11,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:28:11,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:12,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:14,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675632710] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:14,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:28:14,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 13 [2022-07-19 21:28:14,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100585994] [2022-07-19 21:28:14,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:28:14,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:28:14,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:14,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:28:14,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:28:14,080 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 107 [2022-07-19 21:28:14,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 235 flow. Second operand has 7 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:14,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:14,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 107 [2022-07-19 21:28:14,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:14,668 INFO L129 PetriNetUnfolder]: 1986/4368 cut-off events. [2022-07-19 21:28:14,668 INFO L130 PetriNetUnfolder]: For 385/387 co-relation queries the response was YES. [2022-07-19 21:28:14,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7855 conditions, 4368 events. 1986/4368 cut-off events. For 385/387 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35893 event pairs, 405 based on Foata normal form. 1/3597 useless extension candidates. Maximal degree in co-relation 7847. Up to 1351 conditions per place. [2022-07-19 21:28:14,702 INFO L132 encePairwiseOnDemand]: 93/107 looper letters, 80 selfloop transitions, 44 changer transitions 0/193 dead transitions. [2022-07-19 21:28:14,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 193 transitions, 697 flow [2022-07-19 21:28:14,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:28:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:28:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 895 transitions. [2022-07-19 21:28:14,707 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8364485981308412 [2022-07-19 21:28:14,707 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 895 transitions. [2022-07-19 21:28:14,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 895 transitions. [2022-07-19 21:28:14,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:14,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 895 transitions. [2022-07-19 21:28:14,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.5) internal successors, (895), 10 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:14,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:14,714 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:14,714 INFO L186 Difference]: Start difference. First operand has 100 places, 94 transitions, 235 flow. Second operand 10 states and 895 transitions. [2022-07-19 21:28:14,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 193 transitions, 697 flow [2022-07-19 21:28:14,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 193 transitions, 693 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-19 21:28:14,724 INFO L242 Difference]: Finished difference. Result has 111 places, 136 transitions, 511 flow [2022-07-19 21:28:14,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=511, PETRI_PLACES=111, PETRI_TRANSITIONS=136} [2022-07-19 21:28:14,726 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 15 predicate places. [2022-07-19 21:28:14,726 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 136 transitions, 511 flow [2022-07-19 21:28:14,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:14,727 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:14,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:14,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:14,943 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 [2022-07-19 21:28:14,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:28:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:14,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1429961801, now seen corresponding path program 2 times [2022-07-19 21:28:14,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:14,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318071885] [2022-07-19 21:28:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:14,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:15,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:15,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318071885] [2022-07-19 21:28:15,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318071885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:15,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591180195] [2022-07-19 21:28:15,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:28:15,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:15,209 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) [2022-07-19 21:28:15,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:28:15,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:28:15,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:28:15,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:28:15,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:15,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:18,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591180195] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:18,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:28:18,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 12 [2022-07-19 21:28:18,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127906108] [2022-07-19 21:28:18,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:28:18,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:28:18,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:18,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:28:18,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-19 21:28:18,827 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 107 [2022-07-19 21:28:18,828 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 136 transitions, 511 flow. Second operand has 6 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:18,828 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:18,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 107 [2022-07-19 21:28:18,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:19,687 INFO L129 PetriNetUnfolder]: 2061/4718 cut-off events. [2022-07-19 21:28:19,688 INFO L130 PetriNetUnfolder]: For 4342/4571 co-relation queries the response was YES. [2022-07-19 21:28:19,708 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12376 conditions, 4718 events. 2061/4718 cut-off events. For 4342/4571 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 41500 event pairs, 217 based on Foata normal form. 44/4469 useless extension candidates. Maximal degree in co-relation 12364. Up to 816 conditions per place. [2022-07-19 21:28:19,736 INFO L132 encePairwiseOnDemand]: 99/107 looper letters, 248 selfloop transitions, 56 changer transitions 0/376 dead transitions. [2022-07-19 21:28:19,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 376 transitions, 2393 flow [2022-07-19 21:28:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:28:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:28:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 917 transitions. [2022-07-19 21:28:19,740 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8570093457943925 [2022-07-19 21:28:19,740 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 917 transitions. [2022-07-19 21:28:19,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 917 transitions. [2022-07-19 21:28:19,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:19,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 917 transitions. [2022-07-19 21:28:19,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.7) internal successors, (917), 10 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:19,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:19,746 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:19,746 INFO L186 Difference]: Start difference. First operand has 111 places, 136 transitions, 511 flow. Second operand 10 states and 917 transitions. [2022-07-19 21:28:19,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 376 transitions, 2393 flow [2022-07-19 21:28:19,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 376 transitions, 2393 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:28:19,777 INFO L242 Difference]: Finished difference. Result has 129 places, 185 transitions, 1030 flow [2022-07-19 21:28:19,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1030, PETRI_PLACES=129, PETRI_TRANSITIONS=185} [2022-07-19 21:28:19,779 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 33 predicate places. [2022-07-19 21:28:19,779 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 185 transitions, 1030 flow [2022-07-19 21:28:19,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:19,779 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:19,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:19,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:20,003 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 [2022-07-19 21:28:20,003 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:28:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1619176265, now seen corresponding path program 3 times [2022-07-19 21:28:20,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:20,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505353711] [2022-07-19 21:28:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:20,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:20,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:20,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505353711] [2022-07-19 21:28:20,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505353711] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:20,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664881279] [2022-07-19 21:28:20,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:28:20,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:20,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:20,212 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) [2022-07-19 21:28:20,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:28:20,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:28:20,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:28:20,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:28:20,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:20,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:20,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664881279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:28:20,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:28:20,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-07-19 21:28:20,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131433184] [2022-07-19 21:28:20,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:28:20,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:28:20,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:20,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:28:20,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:28:20,519 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 107 [2022-07-19 21:28:20,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 185 transitions, 1030 flow. Second operand has 14 states, 14 states have (on average 79.42857142857143) internal successors, (1112), 14 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:20,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:20,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 107 [2022-07-19 21:28:20,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:21,859 INFO L129 PetriNetUnfolder]: 3604/8239 cut-off events. [2022-07-19 21:28:21,859 INFO L130 PetriNetUnfolder]: For 19069/19618 co-relation queries the response was YES. [2022-07-19 21:28:21,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26011 conditions, 8239 events. 3604/8239 cut-off events. For 19069/19618 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 77255 event pairs, 556 based on Foata normal form. 91/8211 useless extension candidates. Maximal degree in co-relation 25990. Up to 1310 conditions per place. [2022-07-19 21:28:21,954 INFO L132 encePairwiseOnDemand]: 94/107 looper letters, 260 selfloop transitions, 144 changer transitions 6/479 dead transitions. [2022-07-19 21:28:21,955 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 479 transitions, 3728 flow [2022-07-19 21:28:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 21:28:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-19 21:28:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1399 transitions. [2022-07-19 21:28:21,959 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8171728971962616 [2022-07-19 21:28:21,959 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1399 transitions. [2022-07-19 21:28:21,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1399 transitions. [2022-07-19 21:28:21,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:21,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1399 transitions. [2022-07-19 21:28:21,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 87.4375) internal successors, (1399), 16 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:21,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 107.0) internal successors, (1819), 17 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:21,969 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 107.0) internal successors, (1819), 17 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:21,969 INFO L186 Difference]: Start difference. First operand has 129 places, 185 transitions, 1030 flow. Second operand 16 states and 1399 transitions. [2022-07-19 21:28:21,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 479 transitions, 3728 flow [2022-07-19 21:28:22,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 479 transitions, 3712 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-07-19 21:28:22,119 INFO L242 Difference]: Finished difference. Result has 155 places, 280 transitions, 2389 flow [2022-07-19 21:28:22,120 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2389, PETRI_PLACES=155, PETRI_TRANSITIONS=280} [2022-07-19 21:28:22,122 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 59 predicate places. [2022-07-19 21:28:22,122 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 280 transitions, 2389 flow [2022-07-19 21:28:22,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 79.42857142857143) internal successors, (1112), 14 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:22,123 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:22,123 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:22,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:22,347 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 [2022-07-19 21:28:22,347 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:28:22,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:22,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1111005849, now seen corresponding path program 4 times [2022-07-19 21:28:22,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:22,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378822652] [2022-07-19 21:28:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:22,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:22,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:22,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378822652] [2022-07-19 21:28:22,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378822652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:22,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047883473] [2022-07-19 21:28:22,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:28:22,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:22,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:22,520 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) [2022-07-19 21:28:22,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:28:22,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:28:22,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:28:22,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:28:22,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:22,868 INFO L328 TraceCheckSpWp]: Computing backward predicates...