./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 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-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-?-791161d [2022-07-22 21:43:06,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:43:06,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:43:06,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:43:06,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:43:06,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:43:06,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:43:06,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:43:06,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:43:06,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:43:06,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:43:06,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:43:06,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:43:06,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:43:06,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:43:06,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:43:06,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:43:06,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:43:06,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:43:06,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:43:06,356 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:43:06,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:43:06,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:43:06,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:43:06,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:43:06,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:43:06,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:43:06,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:43:06,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:43:06,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:43:06,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:43:06,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:43:06,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:43:06,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:43:06,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:43:06,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:43:06,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:43:06,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:43:06,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:43:06,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:43:06,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:43:06,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:43:06,375 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:43:06,393 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:43:06,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:43:06,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:43:06,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:43:06,397 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:43:06,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:43:06,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:43:06,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:43:06,398 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:43:06,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:43:06,399 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:43:06,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:43:06,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:43:06,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:43:06,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:43:06,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:43:06,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:43:06,400 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:43:06,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:43:06,401 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:43:06,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:43:06,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:43:06,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:43:06,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:43:06,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:43:06,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:43:06,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:43:06,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:43:06,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:43:06,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:43:06,403 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:43:06,403 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:43:06,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:43:06,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 [2022-07-22 21:43:06,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:43:06,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:43:06,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:43:06,646 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:43:06,647 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:43:06,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-07-22 21:43:06,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbff2e028/05aef8ab7efd40b5b3284966126aae2d/FLAG0ded49cc4 [2022-07-22 21:43:06,998 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:43:06,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-07-22 21:43:07,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbff2e028/05aef8ab7efd40b5b3284966126aae2d/FLAG0ded49cc4 [2022-07-22 21:43:07,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbff2e028/05aef8ab7efd40b5b3284966126aae2d [2022-07-22 21:43:07,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:43:07,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:43:07,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:43:07,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:43:07,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:43:07,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:43:07" (1/1) ... [2022-07-22 21:43:07,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a4c9766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:07, skipping insertion in model container [2022-07-22 21:43:07,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:43:07" (1/1) ... [2022-07-22 21:43:07,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:43:07,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:43:07,635 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] [2022-07-22 21:43:07,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:43:07,649 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:43:07,679 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] [2022-07-22 21:43:07,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:43:07,694 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:43:07,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:07 WrapperNode [2022-07-22 21:43:07,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:43:07,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:43:07,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:43:07,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:43:07,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:07" (1/1) ... [2022-07-22 21:43:07,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:07" (1/1) ... [2022-07-22 21:43:07,729 INFO L137 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-07-22 21:43:07,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:43:07,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:43:07,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:43:07,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:43:07,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:07" (1/1) ... [2022-07-22 21:43:07,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:07" (1/1) ... [2022-07-22 21:43:07,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:07" (1/1) ... [2022-07-22 21:43:07,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:07" (1/1) ... [2022-07-22 21:43:07,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:07" (1/1) ... [2022-07-22 21:43:07,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:07" (1/1) ... [2022-07-22 21:43:07,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:07" (1/1) ... [2022-07-22 21:43:07,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:43:07,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:43:07,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:43:07,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:43:07,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:07" (1/1) ... [2022-07-22 21:43:07,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:43:07,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:07,787 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 21:43:07,803 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 21:43:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:43:07,813 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:43:07,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:43:07,814 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:43:07,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:43:07,814 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:43:07,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:43:07,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:43:07,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:43:07,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:43:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:43:07,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:43:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:43:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:43:07,816 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 21:43:07,877 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:43:07,878 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:43:07,999 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:43:08,004 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:43:08,005 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:43:08,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:43:08 BoogieIcfgContainer [2022-07-22 21:43:08,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:43:08,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:43:08,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:43:08,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:43:08,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:43:07" (1/3) ... [2022-07-22 21:43:08,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a3b115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:43:08, skipping insertion in model container [2022-07-22 21:43:08,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:43:07" (2/3) ... [2022-07-22 21:43:08,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a3b115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:43:08, skipping insertion in model container [2022-07-22 21:43:08,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:43:08" (3/3) ... [2022-07-22 21:43:08,012 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2022-07-22 21:43:08,015 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:43:08,021 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:43:08,022 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:43:08,022 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:43:08,099 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:43:08,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 238 flow [2022-07-22 21:43:08,207 INFO L129 PetriNetUnfolder]: 7/104 cut-off events. [2022-07-22 21:43:08,207 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:43:08,210 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. [2022-07-22 21:43:08,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 107 transitions, 238 flow [2022-07-22 21:43:08,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 93 transitions, 204 flow [2022-07-22 21:43:08,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:43:08,235 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@58889abe, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@25ee00a8 [2022-07-22 21:43:08,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:43:08,262 INFO L129 PetriNetUnfolder]: 7/92 cut-off events. [2022-07-22 21:43:08,262 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:43:08,262 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:08,263 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] [2022-07-22 21:43:08,264 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)] === [2022-07-22 21:43:08,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:08,268 INFO L85 PathProgramCache]: Analyzing trace with hash 10639135, now seen corresponding path program 1 times [2022-07-22 21:43:08,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:08,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611768963] [2022-07-22 21:43:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:08,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:08,501 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 21:43:08,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:08,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611768963] [2022-07-22 21:43:08,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611768963] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:43:08,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:43:08,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:43:08,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101441184] [2022-07-22 21:43:08,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:08,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:43:08,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:08,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:43:08,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:43:08,533 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 107 [2022-07-22 21:43:08,536 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) [2022-07-22 21:43:08,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:08,536 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 107 [2022-07-22 21:43:08,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:08,586 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2022-07-22 21:43:08,587 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-22 21:43:08,588 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. [2022-07-22 21:43:08,589 INFO L132 encePairwiseOnDemand]: 103/107 looper letters, 6 selfloop transitions, 0 changer transitions 1/89 dead transitions. [2022-07-22 21:43:08,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 89 transitions, 208 flow [2022-07-22 21:43:08,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:43:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:43:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2022-07-22 21:43:08,600 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9439252336448598 [2022-07-22 21:43:08,600 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2022-07-22 21:43:08,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2022-07-22 21:43:08,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:08,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2022-07-22 21:43:08,608 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) [2022-07-22 21:43:08,612 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) [2022-07-22 21:43:08,613 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) [2022-07-22 21:43:08,614 INFO L186 Difference]: Start difference. First operand has 96 places, 93 transitions, 204 flow. Second operand 2 states and 202 transitions. [2022-07-22 21:43:08,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 89 transitions, 208 flow [2022-07-22 21:43:08,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 89 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:43:08,620 INFO L242 Difference]: Finished difference. Result has 91 places, 88 transitions, 182 flow [2022-07-22 21:43:08,621 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} [2022-07-22 21:43:08,627 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -5 predicate places. [2022-07-22 21:43:08,627 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 182 flow [2022-07-22 21:43:08,628 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) [2022-07-22 21:43:08,628 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:08,628 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] [2022-07-22 21:43:08,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:43:08,629 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)] === [2022-07-22 21:43:08,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:08,630 INFO L85 PathProgramCache]: Analyzing trace with hash -489038424, now seen corresponding path program 1 times [2022-07-22 21:43:08,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:08,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741304730] [2022-07-22 21:43:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:08,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:08,930 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 21:43:08,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:08,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741304730] [2022-07-22 21:43:08,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741304730] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:43:08,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:43:08,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:43:08,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065569088] [2022-07-22 21:43:08,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:08,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:43:08,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:08,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:43:08,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:43:08,934 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 107 [2022-07-22 21:43:08,935 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) [2022-07-22 21:43:08,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:08,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 107 [2022-07-22 21:43:08,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:09,065 INFO L129 PetriNetUnfolder]: 53/322 cut-off events. [2022-07-22 21:43:09,065 INFO L130 PetriNetUnfolder]: For 22/23 co-relation queries the response was YES. [2022-07-22 21:43:09,067 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. [2022-07-22 21:43:09,068 INFO L132 encePairwiseOnDemand]: 98/107 looper letters, 35 selfloop transitions, 9 changer transitions 4/120 dead transitions. [2022-07-22 21:43:09,068 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 120 transitions, 354 flow [2022-07-22 21:43:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:43:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:43:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 644 transitions. [2022-07-22 21:43:09,087 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8598130841121495 [2022-07-22 21:43:09,087 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 644 transitions. [2022-07-22 21:43:09,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 644 transitions. [2022-07-22 21:43:09,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:09,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 644 transitions. [2022-07-22 21:43:09,088 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) [2022-07-22 21:43:09,090 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) [2022-07-22 21:43:09,091 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) [2022-07-22 21:43:09,091 INFO L186 Difference]: Start difference. First operand has 91 places, 88 transitions, 182 flow. Second operand 7 states and 644 transitions. [2022-07-22 21:43:09,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 120 transitions, 354 flow [2022-07-22 21:43:09,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 120 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:43:09,093 INFO L242 Difference]: Finished difference. Result has 100 places, 94 transitions, 235 flow [2022-07-22 21:43:09,094 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} [2022-07-22 21:43:09,094 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 4 predicate places. [2022-07-22 21:43:09,094 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 235 flow [2022-07-22 21:43:09,095 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) [2022-07-22 21:43:09,095 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:09,095 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] [2022-07-22 21:43:09,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:43:09,096 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)] === [2022-07-22 21:43:09,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:09,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1351944439, now seen corresponding path program 1 times [2022-07-22 21:43:09,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:09,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634230367] [2022-07-22 21:43:09,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:09,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:09,383 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 21:43:09,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:09,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634230367] [2022-07-22 21:43:09,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634230367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:09,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228058030] [2022-07-22 21:43:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:09,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:09,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:09,388 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 21:43:09,389 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 21:43:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:09,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:43:09,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:10,303 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 21:43:10,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:11,501 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 21:43:11,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228058030] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:11,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:43:11,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 13 [2022-07-22 21:43:11,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508421048] [2022-07-22 21:43:11,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:11,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:43:11,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:11,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:43:11,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:43:11,504 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 107 [2022-07-22 21:43:11,504 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) [2022-07-22 21:43:11,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:11,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 107 [2022-07-22 21:43:11,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:11,957 INFO L129 PetriNetUnfolder]: 1986/4368 cut-off events. [2022-07-22 21:43:11,957 INFO L130 PetriNetUnfolder]: For 385/387 co-relation queries the response was YES. [2022-07-22 21:43:11,968 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. [2022-07-22 21:43:11,986 INFO L132 encePairwiseOnDemand]: 93/107 looper letters, 80 selfloop transitions, 44 changer transitions 0/193 dead transitions. [2022-07-22 21:43:11,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 193 transitions, 697 flow [2022-07-22 21:43:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:43:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:43:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 895 transitions. [2022-07-22 21:43:11,992 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8364485981308412 [2022-07-22 21:43:11,992 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 895 transitions. [2022-07-22 21:43:11,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 895 transitions. [2022-07-22 21:43:11,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:11,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 895 transitions. [2022-07-22 21:43:11,995 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) [2022-07-22 21:43:11,998 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) [2022-07-22 21:43:11,998 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) [2022-07-22 21:43:11,998 INFO L186 Difference]: Start difference. First operand has 100 places, 94 transitions, 235 flow. Second operand 10 states and 895 transitions. [2022-07-22 21:43:11,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 193 transitions, 697 flow [2022-07-22 21:43:12,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 193 transitions, 693 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-22 21:43:12,006 INFO L242 Difference]: Finished difference. Result has 111 places, 136 transitions, 511 flow [2022-07-22 21:43:12,007 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} [2022-07-22 21:43:12,008 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 15 predicate places. [2022-07-22 21:43:12,008 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 136 transitions, 511 flow [2022-07-22 21:43:12,009 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) [2022-07-22 21:43:12,009 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:12,009 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] [2022-07-22 21:43:12,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:43:12,223 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 21:43:12,224 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)] === [2022-07-22 21:43:12,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:12,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1429961801, now seen corresponding path program 2 times [2022-07-22 21:43:12,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:12,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716384250] [2022-07-22 21:43:12,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:12,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:12,348 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 21:43:12,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:12,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716384250] [2022-07-22 21:43:12,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716384250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:12,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800015041] [2022-07-22 21:43:12,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:43:12,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:12,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:12,357 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 21:43:12,359 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 21:43:12,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:43:12,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:12,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:43:12,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:12,822 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 21:43:12,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:15,586 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 21:43:15,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800015041] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:15,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:43:15,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 12 [2022-07-22 21:43:15,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114059195] [2022-07-22 21:43:15,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:43:15,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:43:15,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:15,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:43:15,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:43:15,601 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 107 [2022-07-22 21:43:15,603 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) [2022-07-22 21:43:15,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:15,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 107 [2022-07-22 21:43:15,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:16,371 INFO L129 PetriNetUnfolder]: 2061/4718 cut-off events. [2022-07-22 21:43:16,372 INFO L130 PetriNetUnfolder]: For 4342/4571 co-relation queries the response was YES. [2022-07-22 21:43:16,387 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. [2022-07-22 21:43:16,410 INFO L132 encePairwiseOnDemand]: 99/107 looper letters, 248 selfloop transitions, 56 changer transitions 0/376 dead transitions. [2022-07-22 21:43:16,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 376 transitions, 2393 flow [2022-07-22 21:43:16,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:43:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:43:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 917 transitions. [2022-07-22 21:43:16,412 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8570093457943925 [2022-07-22 21:43:16,413 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 917 transitions. [2022-07-22 21:43:16,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 917 transitions. [2022-07-22 21:43:16,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:16,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 917 transitions. [2022-07-22 21:43:16,415 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) [2022-07-22 21:43:16,417 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) [2022-07-22 21:43:16,417 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) [2022-07-22 21:43:16,417 INFO L186 Difference]: Start difference. First operand has 111 places, 136 transitions, 511 flow. Second operand 10 states and 917 transitions. [2022-07-22 21:43:16,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 376 transitions, 2393 flow [2022-07-22 21:43:16,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 376 transitions, 2393 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:43:16,440 INFO L242 Difference]: Finished difference. Result has 129 places, 185 transitions, 1030 flow [2022-07-22 21:43:16,440 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} [2022-07-22 21:43:16,441 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 33 predicate places. [2022-07-22 21:43:16,442 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 185 transitions, 1030 flow [2022-07-22 21:43:16,442 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) [2022-07-22 21:43:16,442 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:16,442 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] [2022-07-22 21:43:16,460 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 21:43:16,656 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 21:43:16,657 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)] === [2022-07-22 21:43:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:16,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1619176265, now seen corresponding path program 3 times [2022-07-22 21:43:16,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:16,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90155090] [2022-07-22 21:43:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:16,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:16,802 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 21:43:16,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:16,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90155090] [2022-07-22 21:43:16,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90155090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:16,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572680419] [2022-07-22 21:43:16,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:43:16,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:16,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:16,805 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 21:43:16,820 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 21:43:16,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:43:16,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:16,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:43:16,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:16,999 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 21:43:16,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:43:17,070 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 21:43:17,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572680419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:43:17,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:43:17,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-07-22 21:43:17,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506904528] [2022-07-22 21:43:17,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:43:17,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:43:17,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:43:17,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:43:17,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:43:17,073 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 107 [2022-07-22 21:43:17,074 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) [2022-07-22 21:43:17,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:43:17,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 107 [2022-07-22 21:43:17,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:43:18,194 INFO L129 PetriNetUnfolder]: 3604/8239 cut-off events. [2022-07-22 21:43:18,195 INFO L130 PetriNetUnfolder]: For 19069/19618 co-relation queries the response was YES. [2022-07-22 21:43:18,224 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. [2022-07-22 21:43:18,272 INFO L132 encePairwiseOnDemand]: 94/107 looper letters, 260 selfloop transitions, 144 changer transitions 6/479 dead transitions. [2022-07-22 21:43:18,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 479 transitions, 3728 flow [2022-07-22 21:43:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:43:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:43:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1399 transitions. [2022-07-22 21:43:18,276 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8171728971962616 [2022-07-22 21:43:18,276 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1399 transitions. [2022-07-22 21:43:18,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1399 transitions. [2022-07-22 21:43:18,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:43:18,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1399 transitions. [2022-07-22 21:43:18,279 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) [2022-07-22 21:43:18,282 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) [2022-07-22 21:43:18,282 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) [2022-07-22 21:43:18,282 INFO L186 Difference]: Start difference. First operand has 129 places, 185 transitions, 1030 flow. Second operand 16 states and 1399 transitions. [2022-07-22 21:43:18,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 479 transitions, 3728 flow [2022-07-22 21:43:18,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 479 transitions, 3712 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-07-22 21:43:18,416 INFO L242 Difference]: Finished difference. Result has 155 places, 280 transitions, 2389 flow [2022-07-22 21:43:18,417 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} [2022-07-22 21:43:18,419 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 59 predicate places. [2022-07-22 21:43:18,419 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 280 transitions, 2389 flow [2022-07-22 21:43:18,419 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) [2022-07-22 21:43:18,419 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:43:18,420 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] [2022-07-22 21:43:18,438 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 21:43:18,637 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 21:43:18,637 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)] === [2022-07-22 21:43:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:43:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1111005849, now seen corresponding path program 4 times [2022-07-22 21:43:18,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:43:18,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081279771] [2022-07-22 21:43:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:43:18,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:43:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:43:18,773 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 21:43:18,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:43:18,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081279771] [2022-07-22 21:43:18,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081279771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:43:18,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459563886] [2022-07-22 21:43:18,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:43:18,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:43:18,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:43:18,778 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 21:43:18,779 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 21:43:18,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:43:18,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:43:18,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 21:43:18,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:43:19,084 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 21:43:19,084 INFO L328 TraceCheckSpWp]: Computing backward predicates...