./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-three-array-min.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/popl20-three-array-min.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 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:57:18,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:57:18,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:57:18,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:57:18,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:57:18,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:57:18,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:57:18,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:57:18,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:57:18,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:57:18,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:57:18,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:57:18,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:57:18,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:57:18,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:57:18,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:57:18,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:57:18,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:57:18,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:57:18,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:57:18,267 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:57:18,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:57:18,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:57:18,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:57:18,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:57:18,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:57:18,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:57:18,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:57:18,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:57:18,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:57:18,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:57:18,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:57:18,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:57:18,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:57:18,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:57:18,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:57:18,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:57:18,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:57:18,285 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:57:18,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:57:18,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:57:18,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:57:18,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:57:18,323 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:57:18,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:57:18,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:57:18,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:57:18,325 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:57:18,325 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:57:18,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:57:18,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:57:18,326 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:57:18,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:57:18,327 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:57:18,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:57:18,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:57:18,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:57:18,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:57:18,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:57:18,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:57:18,328 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:57:18,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:57:18,328 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:57:18,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:57:18,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:57:18,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:57:18,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:57:18,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:57:18,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:57:18,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:57:18,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:57:18,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:57:18,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:57:18,331 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:57:18,331 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:57:18,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:57:18,331 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 [2022-07-22 21:57:18,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:57:18,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:57:18,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:57:18,553 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:57:18,554 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:57:18,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2022-07-22 21:57:18,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e1030a96/198762d494f341948b42f81e6cd9b4fe/FLAG2fb9b08f1 [2022-07-22 21:57:18,910 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:57:18,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2022-07-22 21:57:18,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e1030a96/198762d494f341948b42f81e6cd9b4fe/FLAG2fb9b08f1 [2022-07-22 21:57:19,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e1030a96/198762d494f341948b42f81e6cd9b4fe [2022-07-22 21:57:19,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:57:19,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:57:19,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:57:19,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:57:19,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:57:19,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:57:19" (1/1) ... [2022-07-22 21:57:19,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d3424cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:19, skipping insertion in model container [2022-07-22 21:57:19,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:57:19" (1/1) ... [2022-07-22 21:57:19,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:57:19,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:57:19,538 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/popl20-three-array-min.wvr.c[2815,2828] [2022-07-22 21:57:19,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:57:19,567 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:57:19,588 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/popl20-three-array-min.wvr.c[2815,2828] [2022-07-22 21:57:19,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:57:19,603 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:57:19,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:19 WrapperNode [2022-07-22 21:57:19,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:57:19,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:57:19,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:57:19,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:57:19,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:19" (1/1) ... [2022-07-22 21:57:19,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:19" (1/1) ... [2022-07-22 21:57:19,659 INFO L137 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 232 [2022-07-22 21:57:19,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:57:19,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:57:19,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:57:19,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:57:19,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:19" (1/1) ... [2022-07-22 21:57:19,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:19" (1/1) ... [2022-07-22 21:57:19,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:19" (1/1) ... [2022-07-22 21:57:19,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:19" (1/1) ... [2022-07-22 21:57:19,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:19" (1/1) ... [2022-07-22 21:57:19,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:19" (1/1) ... [2022-07-22 21:57:19,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:19" (1/1) ... [2022-07-22 21:57:19,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:57:19,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:57:19,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:57:19,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:57:19,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:19" (1/1) ... [2022-07-22 21:57:19,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:57:19,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:19,732 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 21:57:19,762 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 21:57:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:57:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:57:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:57:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:57:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:57:19,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:57:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:57:19,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:57:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:57:19,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:57:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:57:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:57:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:57:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:57:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:57:19,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:57:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:57:19,788 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 21:57:19,918 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:57:19,920 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:57:20,285 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:57:20,374 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:57:20,375 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-22 21:57:20,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:57:20 BoogieIcfgContainer [2022-07-22 21:57:20,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:57:20,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:57:20,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:57:20,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:57:20,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:57:19" (1/3) ... [2022-07-22 21:57:20,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1588b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:57:20, skipping insertion in model container [2022-07-22 21:57:20,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:19" (2/3) ... [2022-07-22 21:57:20,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1588b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:57:20, skipping insertion in model container [2022-07-22 21:57:20,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:57:20" (3/3) ... [2022-07-22 21:57:20,384 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2022-07-22 21:57:20,389 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:57:20,397 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:57:20,397 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:57:20,397 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:57:20,511 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:57:20,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 298 places, 315 transitions, 654 flow [2022-07-22 21:57:20,672 INFO L129 PetriNetUnfolder]: 27/312 cut-off events. [2022-07-22 21:57:20,672 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:57:20,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 312 events. 27/312 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 203 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 244. Up to 3 conditions per place. [2022-07-22 21:57:20,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 315 transitions, 654 flow [2022-07-22 21:57:20,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 284 places, 301 transitions, 620 flow [2022-07-22 21:57:20,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:57:20,698 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@4b5a2b5e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@509a9140 [2022-07-22 21:57:20,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:57:20,749 INFO L129 PetriNetUnfolder]: 27/300 cut-off events. [2022-07-22 21:57:20,749 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:57:20,749 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:20,750 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:20,751 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 21:57:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:20,755 INFO L85 PathProgramCache]: Analyzing trace with hash 536450808, now seen corresponding path program 1 times [2022-07-22 21:57:20,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:20,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975101269] [2022-07-22 21:57:20,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:20,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:21,049 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 21:57:21,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:21,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975101269] [2022-07-22 21:57:21,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975101269] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:57:21,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:57:21,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:57:21,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868748032] [2022-07-22 21:57:21,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:21,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:57:21,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:21,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:57:21,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:57:21,099 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 315 [2022-07-22 21:57:21,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 301 transitions, 620 flow. Second operand has 2 states, 2 states have (on average 292.5) internal successors, (585), 2 states have internal predecessors, (585), 0 states have call successors, (0), 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 21:57:21,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:21,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 315 [2022-07-22 21:57:21,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:21,180 INFO L129 PetriNetUnfolder]: 22/329 cut-off events. [2022-07-22 21:57:21,181 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-07-22 21:57:21,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 329 events. 22/329 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 382 event pairs, 7 based on Foata normal form. 36/338 useless extension candidates. Maximal degree in co-relation 233. Up to 28 conditions per place. [2022-07-22 21:57:21,185 INFO L132 encePairwiseOnDemand]: 297/315 looper letters, 8 selfloop transitions, 0 changer transitions 12/283 dead transitions. [2022-07-22 21:57:21,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 283 transitions, 600 flow [2022-07-22 21:57:21,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:57:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:57:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 602 transitions. [2022-07-22 21:57:21,200 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9555555555555556 [2022-07-22 21:57:21,201 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 602 transitions. [2022-07-22 21:57:21,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 602 transitions. [2022-07-22 21:57:21,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:21,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 602 transitions. [2022-07-22 21:57:21,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 301.0) internal successors, (602), 2 states have internal predecessors, (602), 0 states have call successors, (0), 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 21:57:21,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 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 21:57:21,219 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 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 21:57:21,221 INFO L186 Difference]: Start difference. First operand has 284 places, 301 transitions, 620 flow. Second operand 2 states and 602 transitions. [2022-07-22 21:57:21,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 283 transitions, 600 flow [2022-07-22 21:57:21,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 283 transitions, 588 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:57:21,237 INFO L242 Difference]: Finished difference. Result has 279 places, 271 transitions, 548 flow [2022-07-22 21:57:21,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=548, PETRI_PLACES=279, PETRI_TRANSITIONS=271} [2022-07-22 21:57:21,246 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, -5 predicate places. [2022-07-22 21:57:21,247 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 271 transitions, 548 flow [2022-07-22 21:57:21,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 292.5) internal successors, (585), 2 states have internal predecessors, (585), 0 states have call successors, (0), 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 21:57:21,248 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:21,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:21,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:57:21,249 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 21:57:21,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:21,250 INFO L85 PathProgramCache]: Analyzing trace with hash 759378185, now seen corresponding path program 1 times [2022-07-22 21:57:21,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:21,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252208682] [2022-07-22 21:57:21,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:21,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:21,607 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 21:57:21,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:21,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252208682] [2022-07-22 21:57:21,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252208682] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:57:21,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:57:21,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 21:57:21,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375425498] [2022-07-22 21:57:21,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:21,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 21:57:21,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:21,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 21:57:21,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-22 21:57:21,616 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 315 [2022-07-22 21:57:21,618 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 271 transitions, 548 flow. Second operand has 8 states, 8 states have (on average 199.625) internal successors, (1597), 8 states have internal predecessors, (1597), 0 states have call successors, (0), 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 21:57:21,618 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:21,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 315 [2022-07-22 21:57:21,618 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:21,962 INFO L129 PetriNetUnfolder]: 202/783 cut-off events. [2022-07-22 21:57:21,963 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-22 21:57:21,967 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1157 conditions, 783 events. 202/783 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3255 event pairs, 103 based on Foata normal form. 0/638 useless extension candidates. Maximal degree in co-relation 1154. Up to 333 conditions per place. [2022-07-22 21:57:21,973 INFO L132 encePairwiseOnDemand]: 297/315 looper letters, 91 selfloop transitions, 15 changer transitions 0/283 dead transitions. [2022-07-22 21:57:21,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 283 transitions, 784 flow [2022-07-22 21:57:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:57:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:57:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1629 transitions. [2022-07-22 21:57:21,982 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2022-07-22 21:57:21,982 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1629 transitions. [2022-07-22 21:57:21,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1629 transitions. [2022-07-22 21:57:21,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:21,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1629 transitions. [2022-07-22 21:57:21,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 203.625) internal successors, (1629), 8 states have internal predecessors, (1629), 0 states have call successors, (0), 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 21:57:21,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 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 21:57:21,996 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 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 21:57:21,996 INFO L186 Difference]: Start difference. First operand has 279 places, 271 transitions, 548 flow. Second operand 8 states and 1629 transitions. [2022-07-22 21:57:21,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 283 transitions, 784 flow [2022-07-22 21:57:22,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 283 transitions, 784 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:57:22,007 INFO L242 Difference]: Finished difference. Result has 275 places, 274 transitions, 602 flow [2022-07-22 21:57:22,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=602, PETRI_PLACES=275, PETRI_TRANSITIONS=274} [2022-07-22 21:57:22,009 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, -9 predicate places. [2022-07-22 21:57:22,010 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 274 transitions, 602 flow [2022-07-22 21:57:22,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 199.625) internal successors, (1597), 8 states have internal predecessors, (1597), 0 states have call successors, (0), 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 21:57:22,011 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:22,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:22,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:57:22,012 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 21:57:22,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:22,014 INFO L85 PathProgramCache]: Analyzing trace with hash 495354362, now seen corresponding path program 1 times [2022-07-22 21:57:22,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:22,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671270945] [2022-07-22 21:57:22,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:22,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:57:22,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:22,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671270945] [2022-07-22 21:57:22,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671270945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:57:22,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:57:22,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-22 21:57:22,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979390929] [2022-07-22 21:57:22,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:22,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:57:22,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:22,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:57:22,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:57:22,511 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 315 [2022-07-22 21:57:22,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 274 transitions, 602 flow. Second operand has 21 states, 21 states have (on average 174.85714285714286) internal successors, (3672), 21 states have internal predecessors, (3672), 0 states have call successors, (0), 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 21:57:22,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:22,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 315 [2022-07-22 21:57:22,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:23,993 INFO L129 PetriNetUnfolder]: 765/2564 cut-off events. [2022-07-22 21:57:23,994 INFO L130 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2022-07-22 21:57:24,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3691 conditions, 2564 events. 765/2564 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 18212 event pairs, 101 based on Foata normal form. 2/2208 useless extension candidates. Maximal degree in co-relation 3686. Up to 282 conditions per place. [2022-07-22 21:57:24,019 INFO L132 encePairwiseOnDemand]: 285/315 looper letters, 146 selfloop transitions, 31 changer transitions 20/357 dead transitions. [2022-07-22 21:57:24,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 357 transitions, 1173 flow [2022-07-22 21:57:24,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 21:57:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-22 21:57:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5638 transitions. [2022-07-22 21:57:24,035 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5593253968253968 [2022-07-22 21:57:24,035 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5638 transitions. [2022-07-22 21:57:24,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5638 transitions. [2022-07-22 21:57:24,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:24,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5638 transitions. [2022-07-22 21:57:24,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 176.1875) internal successors, (5638), 32 states have internal predecessors, (5638), 0 states have call successors, (0), 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 21:57:24,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 315.0) internal successors, (10395), 33 states have internal predecessors, (10395), 0 states have call successors, (0), 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 21:57:24,075 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 315.0) internal successors, (10395), 33 states have internal predecessors, (10395), 0 states have call successors, (0), 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 21:57:24,075 INFO L186 Difference]: Start difference. First operand has 275 places, 274 transitions, 602 flow. Second operand 32 states and 5638 transitions. [2022-07-22 21:57:24,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 357 transitions, 1173 flow [2022-07-22 21:57:24,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 357 transitions, 1149 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:57:24,083 INFO L242 Difference]: Finished difference. Result has 307 places, 285 transitions, 703 flow [2022-07-22 21:57:24,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=703, PETRI_PLACES=307, PETRI_TRANSITIONS=285} [2022-07-22 21:57:24,086 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 23 predicate places. [2022-07-22 21:57:24,086 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 285 transitions, 703 flow [2022-07-22 21:57:24,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 174.85714285714286) internal successors, (3672), 21 states have internal predecessors, (3672), 0 states have call successors, (0), 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 21:57:24,088 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:24,088 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:24,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:57:24,089 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 21:57:24,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:24,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1874260241, now seen corresponding path program 1 times [2022-07-22 21:57:24,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:24,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110296912] [2022-07-22 21:57:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:24,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:57:24,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:24,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110296912] [2022-07-22 21:57:24,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110296912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:24,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127859083] [2022-07-22 21:57:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:24,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:24,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:24,335 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 21:57:24,365 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 21:57:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:57:24,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:57:24,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:57:25,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127859083] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:25,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:25,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 21:57:25,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680241366] [2022-07-22 21:57:25,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:25,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:57:25,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:57:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:57:25,194 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 315 [2022-07-22 21:57:25,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 285 transitions, 703 flow. Second operand has 19 states, 19 states have (on average 240.26315789473685) internal successors, (4565), 19 states have internal predecessors, (4565), 0 states have call successors, (0), 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 21:57:25,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:25,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 315 [2022-07-22 21:57:25,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:26,343 INFO L129 PetriNetUnfolder]: 1489/3795 cut-off events. [2022-07-22 21:57:26,344 INFO L130 PetriNetUnfolder]: For 445/539 co-relation queries the response was YES. [2022-07-22 21:57:26,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6396 conditions, 3795 events. 1489/3795 cut-off events. For 445/539 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 24224 event pairs, 585 based on Foata normal form. 6/2910 useless extension candidates. Maximal degree in co-relation 6384. Up to 1092 conditions per place. [2022-07-22 21:57:26,373 INFO L132 encePairwiseOnDemand]: 286/315 looper letters, 133 selfloop transitions, 54 changer transitions 0/407 dead transitions. [2022-07-22 21:57:26,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 407 transitions, 1375 flow [2022-07-22 21:57:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 21:57:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-22 21:57:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4907 transitions. [2022-07-22 21:57:26,388 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7788888888888889 [2022-07-22 21:57:26,389 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4907 transitions. [2022-07-22 21:57:26,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4907 transitions. [2022-07-22 21:57:26,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:26,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4907 transitions. [2022-07-22 21:57:26,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 245.35) internal successors, (4907), 20 states have internal predecessors, (4907), 0 states have call successors, (0), 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 21:57:26,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 315.0) internal successors, (6615), 21 states have internal predecessors, (6615), 0 states have call successors, (0), 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 21:57:26,415 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 315.0) internal successors, (6615), 21 states have internal predecessors, (6615), 0 states have call successors, (0), 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 21:57:26,415 INFO L186 Difference]: Start difference. First operand has 307 places, 285 transitions, 703 flow. Second operand 20 states and 4907 transitions. [2022-07-22 21:57:26,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 407 transitions, 1375 flow [2022-07-22 21:57:26,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 407 transitions, 1331 flow, removed 5 selfloop flow, removed 21 redundant places. [2022-07-22 21:57:26,430 INFO L242 Difference]: Finished difference. Result has 307 places, 322 transitions, 974 flow [2022-07-22 21:57:26,430 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=974, PETRI_PLACES=307, PETRI_TRANSITIONS=322} [2022-07-22 21:57:26,432 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 23 predicate places. [2022-07-22 21:57:26,432 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 322 transitions, 974 flow [2022-07-22 21:57:26,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 240.26315789473685) internal successors, (4565), 19 states have internal predecessors, (4565), 0 states have call successors, (0), 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 21:57:26,446 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:26,446 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:26,479 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 21:57:26,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:26,664 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 21:57:26,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:26,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1613456199, now seen corresponding path program 1 times [2022-07-22 21:57:26,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:26,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487104714] [2022-07-22 21:57:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:26,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:57:26,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:26,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487104714] [2022-07-22 21:57:26,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487104714] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:26,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535188898] [2022-07-22 21:57:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:26,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:26,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:26,805 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 21:57:26,858 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 21:57:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:26,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:57:26,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:57:27,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:57:27,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535188898] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:27,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:27,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 21:57:27,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622840635] [2022-07-22 21:57:27,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:27,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:57:27,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:27,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:57:27,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:57:27,420 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 315 [2022-07-22 21:57:27,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 322 transitions, 974 flow. Second operand has 19 states, 19 states have (on average 237.31578947368422) internal successors, (4509), 19 states have internal predecessors, (4509), 0 states have call successors, (0), 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 21:57:27,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:27,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 315 [2022-07-22 21:57:27,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:28,556 INFO L129 PetriNetUnfolder]: 1561/3928 cut-off events. [2022-07-22 21:57:28,557 INFO L130 PetriNetUnfolder]: For 1442/1563 co-relation queries the response was YES. [2022-07-22 21:57:28,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7701 conditions, 3928 events. 1561/3928 cut-off events. For 1442/1563 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 25958 event pairs, 773 based on Foata normal form. 35/3331 useless extension candidates. Maximal degree in co-relation 7683. Up to 1568 conditions per place. [2022-07-22 21:57:28,590 INFO L132 encePairwiseOnDemand]: 286/315 looper letters, 72 selfloop transitions, 30 changer transitions 89/408 dead transitions. [2022-07-22 21:57:28,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 408 transitions, 1642 flow [2022-07-22 21:57:28,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 21:57:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-22 21:57:28,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4847 transitions. [2022-07-22 21:57:28,601 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7693650793650794 [2022-07-22 21:57:28,601 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4847 transitions. [2022-07-22 21:57:28,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4847 transitions. [2022-07-22 21:57:28,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:28,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4847 transitions. [2022-07-22 21:57:28,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 242.35) internal successors, (4847), 20 states have internal predecessors, (4847), 0 states have call successors, (0), 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 21:57:28,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 315.0) internal successors, (6615), 21 states have internal predecessors, (6615), 0 states have call successors, (0), 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 21:57:28,624 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 315.0) internal successors, (6615), 21 states have internal predecessors, (6615), 0 states have call successors, (0), 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 21:57:28,624 INFO L186 Difference]: Start difference. First operand has 307 places, 322 transitions, 974 flow. Second operand 20 states and 4847 transitions. [2022-07-22 21:57:28,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 408 transitions, 1642 flow [2022-07-22 21:57:28,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 408 transitions, 1605 flow, removed 11 selfloop flow, removed 3 redundant places. [2022-07-22 21:57:28,639 INFO L242 Difference]: Finished difference. Result has 327 places, 297 transitions, 872 flow [2022-07-22 21:57:28,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=872, PETRI_PLACES=327, PETRI_TRANSITIONS=297} [2022-07-22 21:57:28,642 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 43 predicate places. [2022-07-22 21:57:28,642 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 297 transitions, 872 flow [2022-07-22 21:57:28,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 237.31578947368422) internal successors, (4509), 19 states have internal predecessors, (4509), 0 states have call successors, (0), 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 21:57:28,644 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:28,645 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:28,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 21:57:28,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:28,860 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 21:57:28,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:28,861 INFO L85 PathProgramCache]: Analyzing trace with hash 631866536, now seen corresponding path program 2 times [2022-07-22 21:57:28,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:28,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526075285] [2022-07-22 21:57:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:28,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:57:29,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:29,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526075285] [2022-07-22 21:57:29,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526075285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:29,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545780425] [2022-07-22 21:57:29,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:57:29,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:29,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:29,034 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 21:57:29,035 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 21:57:29,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:57:29,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:57:29,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:57:29,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:57:29,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 21:57:29,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545780425] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:29,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:57:29,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 19 [2022-07-22 21:57:29,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469171929] [2022-07-22 21:57:29,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:29,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:57:29,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:57:29,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:57:29,664 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 315 [2022-07-22 21:57:29,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 297 transitions, 872 flow. Second operand has 9 states, 9 states have (on average 243.55555555555554) internal successors, (2192), 9 states have internal predecessors, (2192), 0 states have call successors, (0), 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 21:57:29,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:29,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 315 [2022-07-22 21:57:29,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:30,103 INFO L129 PetriNetUnfolder]: 826/1975 cut-off events. [2022-07-22 21:57:30,105 INFO L130 PetriNetUnfolder]: For 1591/1642 co-relation queries the response was YES. [2022-07-22 21:57:30,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4626 conditions, 1975 events. 826/1975 cut-off events. For 1591/1642 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11574 event pairs, 220 based on Foata normal form. 2/1706 useless extension candidates. Maximal degree in co-relation 4604. Up to 701 conditions per place. [2022-07-22 21:57:30,122 INFO L132 encePairwiseOnDemand]: 304/315 looper letters, 78 selfloop transitions, 10 changer transitions 0/309 dead transitions. [2022-07-22 21:57:30,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 309 transitions, 1100 flow [2022-07-22 21:57:30,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:57:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:57:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2444 transitions. [2022-07-22 21:57:30,128 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7758730158730158 [2022-07-22 21:57:30,128 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2444 transitions. [2022-07-22 21:57:30,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2444 transitions. [2022-07-22 21:57:30,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:30,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2444 transitions. [2022-07-22 21:57:30,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 244.4) internal successors, (2444), 10 states have internal predecessors, (2444), 0 states have call successors, (0), 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 21:57:30,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 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 21:57:30,139 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 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 21:57:30,139 INFO L186 Difference]: Start difference. First operand has 327 places, 297 transitions, 872 flow. Second operand 10 states and 2444 transitions. [2022-07-22 21:57:30,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 309 transitions, 1100 flow [2022-07-22 21:57:30,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 309 transitions, 1019 flow, removed 17 selfloop flow, removed 18 redundant places. [2022-07-22 21:57:30,150 INFO L242 Difference]: Finished difference. Result has 303 places, 299 transitions, 840 flow [2022-07-22 21:57:30,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=840, PETRI_PLACES=303, PETRI_TRANSITIONS=299} [2022-07-22 21:57:30,153 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 19 predicate places. [2022-07-22 21:57:30,153 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 299 transitions, 840 flow [2022-07-22 21:57:30,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 243.55555555555554) internal successors, (2192), 9 states have internal predecessors, (2192), 0 states have call successors, (0), 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 21:57:30,154 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:30,154 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:30,183 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 21:57:30,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:30,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === 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 21:57:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:30,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1786427132, now seen corresponding path program 1 times [2022-07-22 21:57:30,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:30,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223475515] [2022-07-22 21:57:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:30,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:57:30,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:30,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223475515] [2022-07-22 21:57:30,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223475515] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:30,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330973440] [2022-07-22 21:57:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:30,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:30,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:30,537 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 21:57:30,538 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 21:57:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:30,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:57:30,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:57:31,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:57:31,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330973440] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:31,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:57:31,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 19 [2022-07-22 21:57:31,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915857141] [2022-07-22 21:57:31,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:31,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:57:31,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:31,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:57:31,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:57:31,382 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 315 [2022-07-22 21:57:31,384 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 299 transitions, 840 flow. Second operand has 9 states, 9 states have (on average 239.77777777777777) internal successors, (2158), 9 states have internal predecessors, (2158), 0 states have call successors, (0), 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 21:57:31,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:31,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 315 [2022-07-22 21:57:31,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:32,010 INFO L129 PetriNetUnfolder]: 1352/3191 cut-off events. [2022-07-22 21:57:32,010 INFO L130 PetriNetUnfolder]: For 1676/2026 co-relation queries the response was YES. [2022-07-22 21:57:32,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6975 conditions, 3191 events. 1352/3191 cut-off events. For 1676/2026 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 21777 event pairs, 315 based on Foata normal form. 379/3354 useless extension candidates. Maximal degree in co-relation 6959. Up to 1235 conditions per place. [2022-07-22 21:57:32,035 INFO L132 encePairwiseOnDemand]: 304/315 looper letters, 85 selfloop transitions, 10 changer transitions 0/312 dead transitions. [2022-07-22 21:57:32,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 312 transitions, 1080 flow [2022-07-22 21:57:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:57:32,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:57:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2409 transitions. [2022-07-22 21:57:32,040 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7647619047619048 [2022-07-22 21:57:32,040 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2409 transitions. [2022-07-22 21:57:32,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2409 transitions. [2022-07-22 21:57:32,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:32,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2409 transitions. [2022-07-22 21:57:32,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 240.9) internal successors, (2409), 10 states have internal predecessors, (2409), 0 states have call successors, (0), 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 21:57:32,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 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 21:57:32,049 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 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 21:57:32,050 INFO L186 Difference]: Start difference. First operand has 303 places, 299 transitions, 840 flow. Second operand 10 states and 2409 transitions. [2022-07-22 21:57:32,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 312 transitions, 1080 flow [2022-07-22 21:57:32,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 312 transitions, 1069 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-07-22 21:57:32,059 INFO L242 Difference]: Finished difference. Result has 310 places, 300 transitions, 863 flow [2022-07-22 21:57:32,060 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=863, PETRI_PLACES=310, PETRI_TRANSITIONS=300} [2022-07-22 21:57:32,060 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 26 predicate places. [2022-07-22 21:57:32,061 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 300 transitions, 863 flow [2022-07-22 21:57:32,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 239.77777777777777) internal successors, (2158), 9 states have internal predecessors, (2158), 0 states have call successors, (0), 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 21:57:32,061 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:32,062 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:32,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:57:32,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:32,271 INFO L420 AbstractCegarLoop]: === Iteration 8 === 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 21:57:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:32,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1033487614, now seen corresponding path program 1 times [2022-07-22 21:57:32,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:32,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418663295] [2022-07-22 21:57:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:32,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:57:32,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:32,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418663295] [2022-07-22 21:57:32,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418663295] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:32,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185591392] [2022-07-22 21:57:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:32,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:32,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:32,415 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:57:32,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:57:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:32,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:57:32,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:57:32,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 21:57:33,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185591392] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:33,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:57:33,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 19 [2022-07-22 21:57:33,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512746443] [2022-07-22 21:57:33,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:33,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:57:33,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:33,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:57:33,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:57:33,106 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 315 [2022-07-22 21:57:33,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 300 transitions, 863 flow. Second operand has 9 states, 9 states have (on average 242.66666666666666) internal successors, (2184), 9 states have internal predecessors, (2184), 0 states have call successors, (0), 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 21:57:33,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:33,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 315 [2022-07-22 21:57:33,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:33,478 INFO L129 PetriNetUnfolder]: 778/1843 cut-off events. [2022-07-22 21:57:33,478 INFO L130 PetriNetUnfolder]: For 1532/1946 co-relation queries the response was YES. [2022-07-22 21:57:33,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4133 conditions, 1843 events. 778/1843 cut-off events. For 1532/1946 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10221 event pairs, 159 based on Foata normal form. 439/2097 useless extension candidates. Maximal degree in co-relation 4115. Up to 756 conditions per place. [2022-07-22 21:57:33,494 INFO L132 encePairwiseOnDemand]: 304/315 looper letters, 81 selfloop transitions, 10 changer transitions 0/309 dead transitions. [2022-07-22 21:57:33,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 309 transitions, 1077 flow [2022-07-22 21:57:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:57:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:57:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2435 transitions. [2022-07-22 21:57:33,500 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.773015873015873 [2022-07-22 21:57:33,500 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2435 transitions. [2022-07-22 21:57:33,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2435 transitions. [2022-07-22 21:57:33,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:33,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2435 transitions. [2022-07-22 21:57:33,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 243.5) internal successors, (2435), 10 states have internal predecessors, (2435), 0 states have call successors, (0), 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 21:57:33,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 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 21:57:33,508 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 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 21:57:33,508 INFO L186 Difference]: Start difference. First operand has 310 places, 300 transitions, 863 flow. Second operand 10 states and 2435 transitions. [2022-07-22 21:57:33,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 309 transitions, 1077 flow [2022-07-22 21:57:33,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 309 transitions, 1060 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-22 21:57:33,516 INFO L242 Difference]: Finished difference. Result has 312 places, 299 transitions, 871 flow [2022-07-22 21:57:33,517 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=871, PETRI_PLACES=312, PETRI_TRANSITIONS=299} [2022-07-22 21:57:33,518 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 28 predicate places. [2022-07-22 21:57:33,518 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 299 transitions, 871 flow [2022-07-22 21:57:33,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 242.66666666666666) internal successors, (2184), 9 states have internal predecessors, (2184), 0 states have call successors, (0), 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 21:57:33,519 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:33,519 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:33,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:57:33,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:33,736 INFO L420 AbstractCegarLoop]: === Iteration 9 === 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 21:57:33,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:33,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1176720741, now seen corresponding path program 1 times [2022-07-22 21:57:33,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:33,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935231754] [2022-07-22 21:57:33,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:33,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 21:57:35,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:35,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935231754] [2022-07-22 21:57:35,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935231754] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:35,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441047361] [2022-07-22 21:57:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:35,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:35,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:35,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:57:35,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:57:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:35,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-22 21:57:35,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:35,801 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:57:35,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2022-07-22 21:57:37,082 INFO L356 Elim1Store]: treesize reduction 56, result has 45.6 percent of original size [2022-07-22 21:57:37,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 67 [2022-07-22 21:57:49,443 WARN L233 SmtUtils]: Spent 11.80s on a formula simplification. DAG size of input: 81 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 21:57:50,324 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:57:50,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 181 treesize of output 245 [2022-07-22 21:57:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 21:57:50,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:51,605 WARN L833 $PredicateComparison]: unable to prove that (and (<= (+ c_~mina~0 c_~minb~0) c_~minc~0) (forall ((v_ArrVal_410 Int)) (or (< v_ArrVal_410 (let ((.cse0 (* |c_thread2Thread1of1ForFork0_~i~1#1| 4))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse0)) (select (select |c_#memory_int| c_~B~0.base) (+ .cse0 c_~B~0.offset))))) (forall ((~C~0.offset Int) (~C~0.base Int)) (<= (+ c_~mina~0 c_~minb~0) (select (store (select |c_#memory_int| ~C~0.base) (+ (* |c_thread2Thread1of1ForFork0_~i~1#1| 4) ~C~0.offset) v_ArrVal_410) (+ ~C~0.offset 4))))))) is different from false [2022-07-22 21:57:51,989 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:57:51,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 116 [2022-07-22 21:57:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 1 not checked. [2022-07-22 21:57:52,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441047361] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:57:52,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:57:52,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 32, 29] total 90 [2022-07-22 21:57:52,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041880632] [2022-07-22 21:57:52,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:57:52,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-22 21:57:52,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:52,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-22 21:57:52,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=7425, Unknown=1, NotChecked=174, Total=8010 [2022-07-22 21:57:52,999 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 315 [2022-07-22 21:57:53,005 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 299 transitions, 871 flow. Second operand has 90 states, 90 states have (on average 110.07777777777778) internal successors, (9907), 90 states have internal predecessors, (9907), 0 states have call successors, (0), 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 21:57:53,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:53,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 315 [2022-07-22 21:57:53,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:58:26,143 INFO L129 PetriNetUnfolder]: 36723/57744 cut-off events. [2022-07-22 21:58:26,143 INFO L130 PetriNetUnfolder]: For 43536/43536 co-relation queries the response was YES. [2022-07-22 21:58:26,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143125 conditions, 57744 events. 36723/57744 cut-off events. For 43536/43536 co-relation queries the response was YES. Maximal size of possible extension queue 1844. Compared 455174 event pairs, 2937 based on Foata normal form. 1/53787 useless extension candidates. Maximal degree in co-relation 143105. Up to 8985 conditions per place. [2022-07-22 21:58:26,703 INFO L132 encePairwiseOnDemand]: 226/315 looper letters, 882 selfloop transitions, 352 changer transitions 20/1347 dead transitions. [2022-07-22 21:58:26,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1347 transitions, 6881 flow [2022-07-22 21:58:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-22 21:58:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-07-22 21:58:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 12428 transitions. [2022-07-22 21:58:26,726 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3722072476789458 [2022-07-22 21:58:26,727 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 12428 transitions. [2022-07-22 21:58:26,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 12428 transitions. [2022-07-22 21:58:26,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:58:26,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 12428 transitions. [2022-07-22 21:58:26,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 117.24528301886792) internal successors, (12428), 106 states have internal predecessors, (12428), 0 states have call successors, (0), 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 21:58:26,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 315.0) internal successors, (33705), 107 states have internal predecessors, (33705), 0 states have call successors, (0), 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 21:58:26,879 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 315.0) internal successors, (33705), 107 states have internal predecessors, (33705), 0 states have call successors, (0), 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 21:58:26,880 INFO L186 Difference]: Start difference. First operand has 312 places, 299 transitions, 871 flow. Second operand 106 states and 12428 transitions. [2022-07-22 21:58:26,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1347 transitions, 6881 flow [2022-07-22 21:58:27,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 1347 transitions, 6815 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-22 21:58:27,420 INFO L242 Difference]: Finished difference. Result has 458 places, 614 transitions, 3240 flow [2022-07-22 21:58:27,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=3240, PETRI_PLACES=458, PETRI_TRANSITIONS=614} [2022-07-22 21:58:27,422 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 174 predicate places. [2022-07-22 21:58:27,422 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 614 transitions, 3240 flow [2022-07-22 21:58:27,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 110.07777777777778) internal successors, (9907), 90 states have internal predecessors, (9907), 0 states have call successors, (0), 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 21:58:27,424 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:58:27,425 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:27,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 21:58:27,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:27,649 INFO L420 AbstractCegarLoop]: === Iteration 10 === 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 21:58:27,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:58:27,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1295243747, now seen corresponding path program 2 times [2022-07-22 21:58:27,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:58:27,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145009233] [2022-07-22 21:58:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:58:27,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:58:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:58:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 21:58:29,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:58:29,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145009233] [2022-07-22 21:58:29,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145009233] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:58:29,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118148319] [2022-07-22 21:58:29,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:58:29,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:58:29,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:58:29,551 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:58:29,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:58:29,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:58:29,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:58:29,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 102 conjunts are in the unsatisfiable core [2022-07-22 21:58:29,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:58:30,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:58:31,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 21:58:31,641 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:58:31,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:58:31,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:58:31,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:58:34,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:58:34,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:58:34,033 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-22 21:58:34,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-22 21:58:34,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:58:34,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:58:34,432 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-22 21:58:34,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-22 21:58:35,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:58:35,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:58:35,169 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-22 21:58:35,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2022-07-22 21:58:35,519 INFO L356 Elim1Store]: treesize reduction 94, result has 55.5 percent of original size [2022-07-22 21:58:35,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 148