./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i -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 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:04:21,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:04:21,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:04:21,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:04:21,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:04:21,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:04:21,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:04:21,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:04:21,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:04:21,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:04:21,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:04:21,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:04:21,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:04:21,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:04:21,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:04:21,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:04:21,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:04:21,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:04:21,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:04:21,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:04:21,481 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:04:21,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:04:21,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:04:21,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:04:21,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:04:21,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:04:21,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:04:21,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:04:21,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:04:21,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:04:21,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:04:21,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:04:21,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:04:21,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:04:21,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:04:21,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:04:21,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:04:21,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:04:21,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:04:21,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:04:21,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:04:21,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:04:21,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:04:21,526 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:04:21,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:04:21,527 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:04:21,527 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:04:21,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:04:21,528 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:04:21,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:04:21,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:04:21,529 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:04:21,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:04:21,529 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:04:21,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:04:21,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:04:21,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:04:21,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:04:21,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:04:21,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:04:21,531 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:04:21,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:04:21,531 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:04:21,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:04:21,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:04:21,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:04:21,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:04:21,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:04:21,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:04:21,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:04:21,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:04:21,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:04:21,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:04:21,533 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:04:21,533 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:04:21,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:04:21,533 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f [2022-07-19 21:04:21,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:04:21,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:04:21,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:04:21,775 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:04:21,776 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:04:21,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-07-19 21:04:21,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c04bc9fc/b055d50c7e7a44f2a562c4610c40ce6c/FLAG4d641fbcb [2022-07-19 21:04:22,187 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:04:22,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-07-19 21:04:22,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c04bc9fc/b055d50c7e7a44f2a562c4610c40ce6c/FLAG4d641fbcb [2022-07-19 21:04:22,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c04bc9fc/b055d50c7e7a44f2a562c4610c40ce6c [2022-07-19 21:04:22,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:04:22,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:04:22,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:04:22,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:04:22,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:04:22,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:04:22" (1/1) ... [2022-07-19 21:04:22,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69628a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:22, skipping insertion in model container [2022-07-19 21:04:22,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:04:22" (1/1) ... [2022-07-19 21:04:22,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:04:22,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:04:22,853 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/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-07-19 21:04:22,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:04:22,868 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:04:22,903 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/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-07-19 21:04:22,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:04:22,931 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:04:22,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:22 WrapperNode [2022-07-19 21:04:22,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:04:22,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:04:22,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:04:22,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:04:22,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:22" (1/1) ... [2022-07-19 21:04:22,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:22" (1/1) ... [2022-07-19 21:04:22,978 INFO L137 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2022-07-19 21:04:22,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:04:22,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:04:22,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:04:22,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:04:22,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:22" (1/1) ... [2022-07-19 21:04:22,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:22" (1/1) ... [2022-07-19 21:04:22,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:22" (1/1) ... [2022-07-19 21:04:22,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:22" (1/1) ... [2022-07-19 21:04:23,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:22" (1/1) ... [2022-07-19 21:04:23,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:22" (1/1) ... [2022-07-19 21:04:23,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:22" (1/1) ... [2022-07-19 21:04:23,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:04:23,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:04:23,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:04:23,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:04:23,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:22" (1/1) ... [2022-07-19 21:04:23,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:04:23,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:04:23,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:04:23,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:04:23,102 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-19 21:04:23,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-19 21:04:23,103 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-19 21:04:23,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-19 21:04:23,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:04:23,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:04:23,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:04:23,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:04:23,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:04:23,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:04:23,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:04:23,105 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:04:23,252 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:04:23,253 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:04:23,436 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:04:23,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:04:23,477 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:04:23,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:04:23 BoogieIcfgContainer [2022-07-19 21:04:23,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:04:23,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:04:23,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:04:23,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:04:23,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:04:22" (1/3) ... [2022-07-19 21:04:23,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3667f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:04:23, skipping insertion in model container [2022-07-19 21:04:23,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:22" (2/3) ... [2022-07-19 21:04:23,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3667f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:04:23, skipping insertion in model container [2022-07-19 21:04:23,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:04:23" (3/3) ... [2022-07-19 21:04:23,492 INFO L111 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2022-07-19 21:04:23,497 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:04:23,504 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:04:23,504 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:04:23,505 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:04:23,545 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:23,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 65 transitions, 140 flow [2022-07-19 21:04:23,618 INFO L129 PetriNetUnfolder]: 7/75 cut-off events. [2022-07-19 21:04:23,619 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:23,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 75 events. 7/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 114 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2022-07-19 21:04:23,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 65 transitions, 140 flow [2022-07-19 21:04:23,628 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 64 transitions, 136 flow [2022-07-19 21:04:23,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:23,651 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@21ae5f7b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6549eaf4 [2022-07-19 21:04:23,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:04:23,671 INFO L129 PetriNetUnfolder]: 4/42 cut-off events. [2022-07-19 21:04:23,671 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:23,671 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:23,672 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] [2022-07-19 21:04:23,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:04:23,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1602056178, now seen corresponding path program 1 times [2022-07-19 21:04:23,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:23,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058475058] [2022-07-19 21:04:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:23,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:23,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:23,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058475058] [2022-07-19 21:04:23,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058475058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:23,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:23,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:04:23,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632051849] [2022-07-19 21:04:23,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:23,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:04:23,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:04:23,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:04:23,941 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 65 [2022-07-19 21:04:23,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:23,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:23,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 65 [2022-07-19 21:04:23,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:24,067 INFO L129 PetriNetUnfolder]: 56/168 cut-off events. [2022-07-19 21:04:24,068 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:04:24,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 168 events. 56/168 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 466 event pairs, 12 based on Foata normal form. 94/255 useless extension candidates. Maximal degree in co-relation 263. Up to 56 conditions per place. [2022-07-19 21:04:24,071 INFO L132 encePairwiseOnDemand]: 52/65 looper letters, 21 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2022-07-19 21:04:24,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 184 flow [2022-07-19 21:04:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:04:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:04:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2022-07-19 21:04:24,082 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8246153846153846 [2022-07-19 21:04:24,082 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 268 transitions. [2022-07-19 21:04:24,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 268 transitions. [2022-07-19 21:04:24,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:24,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 268 transitions. [2022-07-19 21:04:24,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 53.6) internal successors, (268), 5 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,091 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,092 INFO L186 Difference]: Start difference. First operand has 64 places, 64 transitions, 136 flow. Second operand 5 states and 268 transitions. [2022-07-19 21:04:24,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 184 flow [2022-07-19 21:04:24,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:04:24,097 INFO L242 Difference]: Finished difference. Result has 57 places, 51 transitions, 141 flow [2022-07-19 21:04:24,098 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2022-07-19 21:04:24,101 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, -7 predicate places. [2022-07-19 21:04:24,101 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 141 flow [2022-07-19 21:04:24,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,101 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:24,102 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-19 21:04:24,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:04:24,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:04:24,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:24,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1782947143, now seen corresponding path program 1 times [2022-07-19 21:04:24,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:24,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949831782] [2022-07-19 21:04:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:24,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:24,122 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:24,146 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:24,151 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:24,153 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-19 21:04:24,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-19 21:04:24,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-19 21:04:24,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-19 21:04:24,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:04:24,157 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:04:24,162 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:04:24,162 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:04:24,178 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:24,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 208 flow [2022-07-19 21:04:24,202 INFO L129 PetriNetUnfolder]: 10/101 cut-off events. [2022-07-19 21:04:24,203 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:04:24,204 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 101 events. 10/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 177 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-07-19 21:04:24,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 92 transitions, 208 flow [2022-07-19 21:04:24,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 77 transitions, 169 flow [2022-07-19 21:04:24,208 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:24,210 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@21ae5f7b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6549eaf4 [2022-07-19 21:04:24,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:04:24,214 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2022-07-19 21:04:24,215 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:24,215 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:24,215 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] [2022-07-19 21:04:24,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:04:24,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:24,216 INFO L85 PathProgramCache]: Analyzing trace with hash 90548252, now seen corresponding path program 1 times [2022-07-19 21:04:24,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:24,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058897879] [2022-07-19 21:04:24,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:24,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:24,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:24,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058897879] [2022-07-19 21:04:24,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058897879] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:24,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:24,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:04:24,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750615463] [2022-07-19 21:04:24,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:24,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:04:24,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:04:24,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:04:24,291 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 92 [2022-07-19 21:04:24,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:24,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 92 [2022-07-19 21:04:24,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:24,479 INFO L129 PetriNetUnfolder]: 740/1312 cut-off events. [2022-07-19 21:04:24,479 INFO L130 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2022-07-19 21:04:24,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2596 conditions, 1312 events. 740/1312 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7296 event pairs, 122 based on Foata normal form. 768/2032 useless extension candidates. Maximal degree in co-relation 2564. Up to 667 conditions per place. [2022-07-19 21:04:24,492 INFO L132 encePairwiseOnDemand]: 75/92 looper letters, 34 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2022-07-19 21:04:24,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 271 flow [2022-07-19 21:04:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:04:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:04:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 340 transitions. [2022-07-19 21:04:24,497 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7391304347826086 [2022-07-19 21:04:24,498 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 340 transitions. [2022-07-19 21:04:24,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 340 transitions. [2022-07-19 21:04:24,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:24,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 340 transitions. [2022-07-19 21:04:24,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,504 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,504 INFO L186 Difference]: Start difference. First operand has 77 places, 77 transitions, 169 flow. Second operand 5 states and 340 transitions. [2022-07-19 21:04:24,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 271 flow [2022-07-19 21:04:24,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 268 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-19 21:04:24,507 INFO L242 Difference]: Finished difference. Result has 67 places, 63 transitions, 186 flow [2022-07-19 21:04:24,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2022-07-19 21:04:24,508 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2022-07-19 21:04:24,508 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 186 flow [2022-07-19 21:04:24,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,508 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:24,508 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] [2022-07-19 21:04:24,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:04:24,509 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:04:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:24,509 INFO L85 PathProgramCache]: Analyzing trace with hash -965967294, now seen corresponding path program 1 times [2022-07-19 21:04:24,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:24,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507826207] [2022-07-19 21:04:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:24,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:24,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:24,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507826207] [2022-07-19 21:04:24,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507826207] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:24,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:24,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:04:24,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133961638] [2022-07-19 21:04:24,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:24,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:04:24,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:24,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:04:24,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:04:24,593 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 92 [2022-07-19 21:04:24,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,594 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:24,594 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 92 [2022-07-19 21:04:24,594 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:24,633 INFO L129 PetriNetUnfolder]: 38/250 cut-off events. [2022-07-19 21:04:24,634 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-07-19 21:04:24,634 INFO L84 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 250 events. 38/250 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1086 event pairs, 6 based on Foata normal form. 46/295 useless extension candidates. Maximal degree in co-relation 392. Up to 50 conditions per place. [2022-07-19 21:04:24,635 INFO L132 encePairwiseOnDemand]: 86/92 looper letters, 6 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2022-07-19 21:04:24,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 210 flow [2022-07-19 21:04:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:04:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:04:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2022-07-19 21:04:24,636 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7608695652173914 [2022-07-19 21:04:24,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2022-07-19 21:04:24,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2022-07-19 21:04:24,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:24,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2022-07-19 21:04:24,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,639 INFO L186 Difference]: Start difference. First operand has 67 places, 63 transitions, 186 flow. Second operand 3 states and 210 transitions. [2022-07-19 21:04:24,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 210 flow [2022-07-19 21:04:24,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 204 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-19 21:04:24,643 INFO L242 Difference]: Finished difference. Result has 68 places, 61 transitions, 180 flow [2022-07-19 21:04:24,643 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2022-07-19 21:04:24,645 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2022-07-19 21:04:24,645 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 180 flow [2022-07-19 21:04:24,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,645 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:24,645 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] [2022-07-19 21:04:24,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:04:24,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:04:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:24,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1614490504, now seen corresponding path program 1 times [2022-07-19 21:04:24,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:24,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697174180] [2022-07-19 21:04:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:24,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:24,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:24,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697174180] [2022-07-19 21:04:24,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697174180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:24,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:24,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:04:24,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184269861] [2022-07-19 21:04:24,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:24,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:04:24,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:24,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:04:24,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:04:24,727 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 92 [2022-07-19 21:04:24,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 53.166666666666664) internal successors, (319), 6 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:24,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 92 [2022-07-19 21:04:24,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:24,827 INFO L129 PetriNetUnfolder]: 91/341 cut-off events. [2022-07-19 21:04:24,827 INFO L130 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-07-19 21:04:24,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 341 events. 91/341 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1853 event pairs, 9 based on Foata normal form. 3/337 useless extension candidates. Maximal degree in co-relation 906. Up to 145 conditions per place. [2022-07-19 21:04:24,829 INFO L132 encePairwiseOnDemand]: 83/92 looper letters, 44 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2022-07-19 21:04:24,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 410 flow [2022-07-19 21:04:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:04:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:04:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 408 transitions. [2022-07-19 21:04:24,831 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2022-07-19 21:04:24,831 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 408 transitions. [2022-07-19 21:04:24,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 408 transitions. [2022-07-19 21:04:24,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:24,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 408 transitions. [2022-07-19 21:04:24,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.285714285714285) internal successors, (408), 7 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,834 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,834 INFO L186 Difference]: Start difference. First operand has 68 places, 61 transitions, 180 flow. Second operand 7 states and 408 transitions. [2022-07-19 21:04:24,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 410 flow [2022-07-19 21:04:24,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:04:24,839 INFO L242 Difference]: Finished difference. Result has 76 places, 69 transitions, 258 flow [2022-07-19 21:04:24,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=258, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2022-07-19 21:04:24,840 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -1 predicate places. [2022-07-19 21:04:24,841 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 258 flow [2022-07-19 21:04:24,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.166666666666664) internal successors, (319), 6 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:24,841 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:24,841 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-07-19 21:04:24,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:04:24,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:04:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1827137551, now seen corresponding path program 1 times [2022-07-19 21:04:24,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:24,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992242910] [2022-07-19 21:04:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:24,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:24,870 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:24,900 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:24,900 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:24,902 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-19 21:04:24,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-19 21:04:24,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-19 21:04:24,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-19 21:04:24,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-19 21:04:24,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:04:24,905 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:04:24,905 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:04:24,905 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:04:24,927 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:24,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 280 flow [2022-07-19 21:04:24,937 INFO L129 PetriNetUnfolder]: 13/127 cut-off events. [2022-07-19 21:04:24,937 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:04:24,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 127 events. 13/127 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 231 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2022-07-19 21:04:24,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 280 flow [2022-07-19 21:04:24,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 90 transitions, 204 flow [2022-07-19 21:04:24,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:24,946 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@21ae5f7b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6549eaf4 [2022-07-19 21:04:24,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:04:24,948 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2022-07-19 21:04:24,948 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:24,948 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:24,948 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] [2022-07-19 21:04:24,949 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:04:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:24,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1010684622, now seen corresponding path program 1 times [2022-07-19 21:04:24,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:24,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697632256] [2022-07-19 21:04:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:24,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:25,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:25,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697632256] [2022-07-19 21:04:25,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697632256] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:25,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:25,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:04:25,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225766377] [2022-07-19 21:04:25,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:25,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:04:25,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:25,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:04:25,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:04:25,008 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 119 [2022-07-19 21:04:25,009 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 90 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:25,009 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:25,009 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 119 [2022-07-19 21:04:25,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:25,808 INFO L129 PetriNetUnfolder]: 6323/9886 cut-off events. [2022-07-19 21:04:25,808 INFO L130 PetriNetUnfolder]: For 2152/2152 co-relation queries the response was YES. [2022-07-19 21:04:25,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19896 conditions, 9886 events. 6323/9886 cut-off events. For 2152/2152 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 66023 event pairs, 1736 based on Foata normal form. 5068/14571 useless extension candidates. Maximal degree in co-relation 19863. Up to 5413 conditions per place. [2022-07-19 21:04:25,884 INFO L132 encePairwiseOnDemand]: 98/119 looper letters, 47 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2022-07-19 21:04:25,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 364 flow [2022-07-19 21:04:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:04:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:04:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2022-07-19 21:04:25,886 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.692436974789916 [2022-07-19 21:04:25,886 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2022-07-19 21:04:25,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2022-07-19 21:04:25,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:25,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2022-07-19 21:04:25,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:25,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:25,888 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:25,888 INFO L186 Difference]: Start difference. First operand has 90 places, 90 transitions, 204 flow. Second operand 5 states and 412 transitions. [2022-07-19 21:04:25,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 364 flow [2022-07-19 21:04:25,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 353 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-07-19 21:04:25,892 INFO L242 Difference]: Finished difference. Result has 77 places, 75 transitions, 231 flow [2022-07-19 21:04:25,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2022-07-19 21:04:25,893 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, -13 predicate places. [2022-07-19 21:04:25,893 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 231 flow [2022-07-19 21:04:25,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:25,893 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:25,894 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] [2022-07-19 21:04:25,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:04:25,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:04:25,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:25,894 INFO L85 PathProgramCache]: Analyzing trace with hash -156069315, now seen corresponding path program 1 times [2022-07-19 21:04:25,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:25,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616255110] [2022-07-19 21:04:25,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:25,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:25,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:25,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616255110] [2022-07-19 21:04:25,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616255110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:25,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:25,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:04:25,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719290350] [2022-07-19 21:04:25,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:25,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:04:25,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:25,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:04:25,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:04:25,925 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 119 [2022-07-19 21:04:25,925 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:25,925 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:25,925 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 119 [2022-07-19 21:04:25,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:25,998 INFO L129 PetriNetUnfolder]: 146/567 cut-off events. [2022-07-19 21:04:25,998 INFO L130 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2022-07-19 21:04:26,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 567 events. 146/567 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3223 event pairs, 16 based on Foata normal form. 225/787 useless extension candidates. Maximal degree in co-relation 1110. Up to 168 conditions per place. [2022-07-19 21:04:26,002 INFO L132 encePairwiseOnDemand]: 111/119 looper letters, 8 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2022-07-19 21:04:26,002 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 264 flow [2022-07-19 21:04:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:04:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:04:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-07-19 21:04:26,003 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7282913165266106 [2022-07-19 21:04:26,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-07-19 21:04:26,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-07-19 21:04:26,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:26,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-07-19 21:04:26,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:26,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:26,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:26,006 INFO L186 Difference]: Start difference. First operand has 77 places, 75 transitions, 231 flow. Second operand 3 states and 260 transitions. [2022-07-19 21:04:26,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 264 flow [2022-07-19 21:04:26,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 256 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-19 21:04:26,008 INFO L242 Difference]: Finished difference. Result has 78 places, 72 transitions, 221 flow [2022-07-19 21:04:26,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2022-07-19 21:04:26,009 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, -12 predicate places. [2022-07-19 21:04:26,009 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 221 flow [2022-07-19 21:04:26,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:26,009 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:26,009 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:26,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:04:26,010 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:04:26,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:26,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1201091516, now seen corresponding path program 1 times [2022-07-19 21:04:26,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:26,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23621127] [2022-07-19 21:04:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:26,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:26,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:26,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23621127] [2022-07-19 21:04:26,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23621127] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:26,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:26,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:04:26,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182486069] [2022-07-19 21:04:26,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:26,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:04:26,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:26,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:04:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:04:26,066 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 119 [2022-07-19 21:04:26,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:26,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:26,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 119 [2022-07-19 21:04:26,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:26,223 INFO L129 PetriNetUnfolder]: 316/963 cut-off events. [2022-07-19 21:04:26,224 INFO L130 PetriNetUnfolder]: For 667/667 co-relation queries the response was YES. [2022-07-19 21:04:26,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 963 events. 316/963 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7318 event pairs, 20 based on Foata normal form. 6/950 useless extension candidates. Maximal degree in co-relation 2753. Up to 497 conditions per place. [2022-07-19 21:04:26,231 INFO L132 encePairwiseOnDemand]: 107/119 looper letters, 61 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2022-07-19 21:04:26,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 553 flow [2022-07-19 21:04:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:04:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:04:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 491 transitions. [2022-07-19 21:04:26,233 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5894357743097239 [2022-07-19 21:04:26,233 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 491 transitions. [2022-07-19 21:04:26,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 491 transitions. [2022-07-19 21:04:26,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:26,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 491 transitions. [2022-07-19 21:04:26,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:26,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:26,236 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:26,236 INFO L186 Difference]: Start difference. First operand has 78 places, 72 transitions, 221 flow. Second operand 7 states and 491 transitions. [2022-07-19 21:04:26,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 553 flow [2022-07-19 21:04:26,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 532 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:04:26,240 INFO L242 Difference]: Finished difference. Result has 86 places, 84 transitions, 336 flow [2022-07-19 21:04:26,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=336, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2022-07-19 21:04:26,241 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, -4 predicate places. [2022-07-19 21:04:26,241 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 336 flow [2022-07-19 21:04:26,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:26,241 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:26,241 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-19 21:04:26,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:04:26,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:04:26,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:26,242 INFO L85 PathProgramCache]: Analyzing trace with hash -298955266, now seen corresponding path program 2 times [2022-07-19 21:04:26,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:26,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534200569] [2022-07-19 21:04:26,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:26,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:26,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:26,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534200569] [2022-07-19 21:04:26,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534200569] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:04:26,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444893155] [2022-07-19 21:04:26,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:04:26,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:04:26,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:04:26,348 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:04:26,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:04:26,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:04:26,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:04:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:04:26,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:04:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:26,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:04:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:26,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444893155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:04:26,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:04:26,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-07-19 21:04:26,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263610369] [2022-07-19 21:04:26,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:04:26,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:04:26,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:26,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:04:26,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:04:26,804 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 119 [2022-07-19 21:04:26,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 336 flow. Second operand has 23 states, 23 states have (on average 61.608695652173914) internal successors, (1417), 23 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:26,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:26,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 119 [2022-07-19 21:04:26,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:27,469 INFO L129 PetriNetUnfolder]: 647/1843 cut-off events. [2022-07-19 21:04:27,469 INFO L130 PetriNetUnfolder]: For 1701/1701 co-relation queries the response was YES. [2022-07-19 21:04:27,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5668 conditions, 1843 events. 647/1843 cut-off events. For 1701/1701 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15434 event pairs, 14 based on Foata normal form. 10/1840 useless extension candidates. Maximal degree in co-relation 5622. Up to 505 conditions per place. [2022-07-19 21:04:27,482 INFO L132 encePairwiseOnDemand]: 103/119 looper letters, 100 selfloop transitions, 42 changer transitions 0/177 dead transitions. [2022-07-19 21:04:27,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 177 transitions, 1045 flow [2022-07-19 21:04:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:04:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:04:27,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 894 transitions. [2022-07-19 21:04:27,485 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5778926955397543 [2022-07-19 21:04:27,486 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 894 transitions. [2022-07-19 21:04:27,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 894 transitions. [2022-07-19 21:04:27,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:27,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 894 transitions. [2022-07-19 21:04:27,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 68.76923076923077) internal successors, (894), 13 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:27,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:27,490 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:27,490 INFO L186 Difference]: Start difference. First operand has 86 places, 84 transitions, 336 flow. Second operand 13 states and 894 transitions. [2022-07-19 21:04:27,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 177 transitions, 1045 flow [2022-07-19 21:04:27,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 177 transitions, 1032 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:04:27,495 INFO L242 Difference]: Finished difference. Result has 100 places, 108 transitions, 599 flow [2022-07-19 21:04:27,495 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=599, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2022-07-19 21:04:27,496 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 10 predicate places. [2022-07-19 21:04:27,496 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 599 flow [2022-07-19 21:04:27,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.608695652173914) internal successors, (1417), 23 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:27,497 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:27,497 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:27,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:04:27,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 21:04:27,715 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:04:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:27,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1247337996, now seen corresponding path program 1 times [2022-07-19 21:04:27,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:27,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469738160] [2022-07-19 21:04:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:27,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:27,728 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:27,749 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:27,749 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:27,749 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-19 21:04:27,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-19 21:04:27,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-07-19 21:04:27,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-19 21:04:27,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-19 21:04:27,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-19 21:04:27,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:04:27,751 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-07-19 21:04:27,751 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:04:27,751 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:04:27,769 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:27,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 143 places, 146 transitions, 356 flow [2022-07-19 21:04:27,785 INFO L129 PetriNetUnfolder]: 16/153 cut-off events. [2022-07-19 21:04:27,785 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:04:27,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 153 events. 16/153 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 295 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 173. Up to 10 conditions per place. [2022-07-19 21:04:27,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 146 transitions, 356 flow [2022-07-19 21:04:27,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 103 transitions, 241 flow [2022-07-19 21:04:27,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:27,791 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@21ae5f7b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6549eaf4 [2022-07-19 21:04:27,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-19 21:04:27,793 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2022-07-19 21:04:27,793 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:27,793 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:27,793 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] [2022-07-19 21:04:27,793 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:04:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:27,795 INFO L85 PathProgramCache]: Analyzing trace with hash -610787504, now seen corresponding path program 1 times [2022-07-19 21:04:27,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:27,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554057635] [2022-07-19 21:04:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:27,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:27,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:27,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554057635] [2022-07-19 21:04:27,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554057635] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:27,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:27,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:04:27,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964991483] [2022-07-19 21:04:27,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:27,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:04:27,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:27,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:04:27,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:04:27,825 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 146 [2022-07-19 21:04:27,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:27,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:27,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 146 [2022-07-19 21:04:27,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:32,467 INFO L129 PetriNetUnfolder]: 50080/69789 cut-off events. [2022-07-19 21:04:32,467 INFO L130 PetriNetUnfolder]: For 20816/20816 co-relation queries the response was YES. [2022-07-19 21:04:32,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143487 conditions, 69789 events. 50080/69789 cut-off events. For 20816/20816 co-relation queries the response was YES. Maximal size of possible extension queue 2579. Compared 487731 event pairs, 15030 based on Foata normal form. 34578/102288 useless extension candidates. Maximal degree in co-relation 143453. Up to 42229 conditions per place. [2022-07-19 21:04:33,147 INFO L132 encePairwiseOnDemand]: 121/146 looper letters, 60 selfloop transitions, 15 changer transitions 0/118 dead transitions. [2022-07-19 21:04:33,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 118 transitions, 463 flow [2022-07-19 21:04:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:04:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:04:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 484 transitions. [2022-07-19 21:04:33,152 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.663013698630137 [2022-07-19 21:04:33,152 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 484 transitions. [2022-07-19 21:04:33,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 484 transitions. [2022-07-19 21:04:33,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:33,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 484 transitions. [2022-07-19 21:04:33,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,154 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,155 INFO L186 Difference]: Start difference. First operand has 103 places, 103 transitions, 241 flow. Second operand 5 states and 484 transitions. [2022-07-19 21:04:33,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 118 transitions, 463 flow [2022-07-19 21:04:33,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 118 transitions, 438 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-07-19 21:04:33,161 INFO L242 Difference]: Finished difference. Result has 87 places, 87 transitions, 276 flow [2022-07-19 21:04:33,162 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=87, PETRI_TRANSITIONS=87} [2022-07-19 21:04:33,163 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -16 predicate places. [2022-07-19 21:04:33,163 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 87 transitions, 276 flow [2022-07-19 21:04:33,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,163 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:33,163 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] [2022-07-19 21:04:33,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:04:33,164 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:04:33,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:33,164 INFO L85 PathProgramCache]: Analyzing trace with hash 497899920, now seen corresponding path program 1 times [2022-07-19 21:04:33,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:33,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599285827] [2022-07-19 21:04:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:33,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:33,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:33,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599285827] [2022-07-19 21:04:33,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599285827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:33,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:33,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:04:33,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390019016] [2022-07-19 21:04:33,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:33,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:04:33,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:33,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:04:33,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:04:33,189 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 146 [2022-07-19 21:04:33,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 87 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:33,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 146 [2022-07-19 21:04:33,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:33,285 INFO L129 PetriNetUnfolder]: 414/1413 cut-off events. [2022-07-19 21:04:33,285 INFO L130 PetriNetUnfolder]: For 504/504 co-relation queries the response was YES. [2022-07-19 21:04:33,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2913 conditions, 1413 events. 414/1413 cut-off events. For 504/504 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10153 event pairs, 50 based on Foata normal form. 765/2169 useless extension candidates. Maximal degree in co-relation 2875. Up to 460 conditions per place. [2022-07-19 21:04:33,293 INFO L132 encePairwiseOnDemand]: 136/146 looper letters, 10 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2022-07-19 21:04:33,293 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 87 transitions, 318 flow [2022-07-19 21:04:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:04:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:04:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2022-07-19 21:04:33,295 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7077625570776256 [2022-07-19 21:04:33,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2022-07-19 21:04:33,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2022-07-19 21:04:33,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:33,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2022-07-19 21:04:33,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,297 INFO L186 Difference]: Start difference. First operand has 87 places, 87 transitions, 276 flow. Second operand 3 states and 310 transitions. [2022-07-19 21:04:33,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 87 transitions, 318 flow [2022-07-19 21:04:33,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 308 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-07-19 21:04:33,300 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 262 flow [2022-07-19 21:04:33,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-07-19 21:04:33,300 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -15 predicate places. [2022-07-19 21:04:33,301 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 262 flow [2022-07-19 21:04:33,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,301 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:33,301 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] [2022-07-19 21:04:33,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:04:33,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:04:33,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:33,302 INFO L85 PathProgramCache]: Analyzing trace with hash -2145552573, now seen corresponding path program 1 times [2022-07-19 21:04:33,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:33,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060189495] [2022-07-19 21:04:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:33,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:33,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:33,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060189495] [2022-07-19 21:04:33,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060189495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:33,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:33,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:04:33,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55306226] [2022-07-19 21:04:33,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:33,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:04:33,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:33,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:04:33,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:04:33,344 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 146 [2022-07-19 21:04:33,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:33,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 146 [2022-07-19 21:04:33,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:33,576 INFO L129 PetriNetUnfolder]: 851/2282 cut-off events. [2022-07-19 21:04:33,576 INFO L130 PetriNetUnfolder]: For 1721/1721 co-relation queries the response was YES. [2022-07-19 21:04:33,584 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6882 conditions, 2282 events. 851/2282 cut-off events. For 1721/1721 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19822 event pairs, 37 based on Foata normal form. 10/2254 useless extension candidates. Maximal degree in co-relation 6842. Up to 1407 conditions per place. [2022-07-19 21:04:33,594 INFO L132 encePairwiseOnDemand]: 131/146 looper letters, 78 selfloop transitions, 22 changer transitions 0/138 dead transitions. [2022-07-19 21:04:33,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 696 flow [2022-07-19 21:04:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:04:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:04:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 574 transitions. [2022-07-19 21:04:33,596 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5616438356164384 [2022-07-19 21:04:33,596 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 574 transitions. [2022-07-19 21:04:33,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 574 transitions. [2022-07-19 21:04:33,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:33,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 574 transitions. [2022-07-19 21:04:33,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,599 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,600 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 262 flow. Second operand 7 states and 574 transitions. [2022-07-19 21:04:33,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 696 flow [2022-07-19 21:04:33,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 138 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:04:33,604 INFO L242 Difference]: Finished difference. Result has 96 places, 99 transitions, 414 flow [2022-07-19 21:04:33,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2022-07-19 21:04:33,605 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, -7 predicate places. [2022-07-19 21:04:33,605 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 414 flow [2022-07-19 21:04:33,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:33,605 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:33,606 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-19 21:04:33,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:04:33,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:04:33,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:33,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1408106927, now seen corresponding path program 2 times [2022-07-19 21:04:33,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:33,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578452810] [2022-07-19 21:04:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:33,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:33,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:33,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578452810] [2022-07-19 21:04:33,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578452810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:04:33,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163976081] [2022-07-19 21:04:33,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:04:33,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:04:33,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:04:33,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:04:33,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:04:33,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:04:33,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:04:33,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:04:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:04:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:34,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:04:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:34,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163976081] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:04:34,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:04:34,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-07-19 21:04:34,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68470054] [2022-07-19 21:04:34,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:04:34,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:04:34,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:34,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:04:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:04:34,130 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2022-07-19 21:04:34,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 414 flow. Second operand has 23 states, 23 states have (on average 70.6086956521739) internal successors, (1624), 23 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:34,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:34,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2022-07-19 21:04:34,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:35,018 INFO L129 PetriNetUnfolder]: 1825/4623 cut-off events. [2022-07-19 21:04:35,018 INFO L130 PetriNetUnfolder]: For 4546/4546 co-relation queries the response was YES. [2022-07-19 21:04:35,036 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14609 conditions, 4623 events. 1825/4623 cut-off events. For 4546/4546 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 45812 event pairs, 23 based on Foata normal form. 20/4620 useless extension candidates. Maximal degree in co-relation 14562. Up to 1463 conditions per place. [2022-07-19 21:04:35,054 INFO L132 encePairwiseOnDemand]: 126/146 looper letters, 129 selfloop transitions, 55 changer transitions 0/221 dead transitions. [2022-07-19 21:04:35,054 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 221 transitions, 1350 flow [2022-07-19 21:04:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:04:35,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:04:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1049 transitions. [2022-07-19 21:04:35,056 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5526870389884089 [2022-07-19 21:04:35,056 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1049 transitions. [2022-07-19 21:04:35,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1049 transitions. [2022-07-19 21:04:35,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:35,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1049 transitions. [2022-07-19 21:04:35,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 80.6923076923077) internal successors, (1049), 13 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:35,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:35,061 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:35,061 INFO L186 Difference]: Start difference. First operand has 96 places, 99 transitions, 414 flow. Second operand 13 states and 1049 transitions. [2022-07-19 21:04:35,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 221 transitions, 1350 flow [2022-07-19 21:04:35,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 221 transitions, 1334 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:04:35,070 INFO L242 Difference]: Finished difference. Result has 110 places, 131 transitions, 763 flow [2022-07-19 21:04:35,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=763, PETRI_PLACES=110, PETRI_TRANSITIONS=131} [2022-07-19 21:04:35,071 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-07-19 21:04:35,071 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 131 transitions, 763 flow [2022-07-19 21:04:35,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 70.6086956521739) internal successors, (1624), 23 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:35,072 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:35,072 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:35,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 21:04:35,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 21:04:35,288 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:04:35,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:35,288 INFO L85 PathProgramCache]: Analyzing trace with hash -540595927, now seen corresponding path program 3 times [2022-07-19 21:04:35,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:35,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347282753] [2022-07-19 21:04:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:35,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:35,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:35,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347282753] [2022-07-19 21:04:35,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347282753] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:04:35,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583974231] [2022-07-19 21:04:35,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:04:35,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:04:35,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:04:35,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:04:35,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:04:35,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:04:35,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:04:35,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:04:35,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:04:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:35,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:04:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:35,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583974231] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:04:35,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:04:35,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 26 [2022-07-19 21:04:35,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411320506] [2022-07-19 21:04:35,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:04:35,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 21:04:35,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:35,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 21:04:35,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-07-19 21:04:35,769 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2022-07-19 21:04:35,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 131 transitions, 763 flow. Second operand has 26 states, 26 states have (on average 70.96153846153847) internal successors, (1845), 26 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:35,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:35,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2022-07-19 21:04:35,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:38,445 INFO L129 PetriNetUnfolder]: 4409/11192 cut-off events. [2022-07-19 21:04:38,445 INFO L130 PetriNetUnfolder]: For 16869/16869 co-relation queries the response was YES. [2022-07-19 21:04:38,489 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40342 conditions, 11192 events. 4409/11192 cut-off events. For 16869/16869 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 122705 event pairs, 23 based on Foata normal form. 180/11349 useless extension candidates. Maximal degree in co-relation 40289. Up to 2321 conditions per place. [2022-07-19 21:04:38,538 INFO L132 encePairwiseOnDemand]: 124/146 looper letters, 159 selfloop transitions, 202 changer transitions 0/398 dead transitions. [2022-07-19 21:04:38,538 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 398 transitions, 3162 flow [2022-07-19 21:04:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 21:04:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-19 21:04:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2445 transitions. [2022-07-19 21:04:38,543 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5233304794520548 [2022-07-19 21:04:38,543 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2445 transitions. [2022-07-19 21:04:38,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2445 transitions. [2022-07-19 21:04:38,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:38,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2445 transitions. [2022-07-19 21:04:38,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 76.40625) internal successors, (2445), 32 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:38,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 146.0) internal successors, (4818), 33 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:38,559 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 146.0) internal successors, (4818), 33 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:38,559 INFO L186 Difference]: Start difference. First operand has 110 places, 131 transitions, 763 flow. Second operand 32 states and 2445 transitions. [2022-07-19 21:04:38,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 398 transitions, 3162 flow [2022-07-19 21:04:38,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 398 transitions, 3031 flow, removed 48 selfloop flow, removed 5 redundant places. [2022-07-19 21:04:38,592 INFO L242 Difference]: Finished difference. Result has 137 places, 256 transitions, 1978 flow [2022-07-19 21:04:38,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1978, PETRI_PLACES=137, PETRI_TRANSITIONS=256} [2022-07-19 21:04:38,593 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 34 predicate places. [2022-07-19 21:04:38,593 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 256 transitions, 1978 flow [2022-07-19 21:04:38,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 70.96153846153847) internal successors, (1845), 26 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:38,594 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:38,594 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:38,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:04:38,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:04:38,815 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:04:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:38,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1175858377, now seen corresponding path program 1 times [2022-07-19 21:04:38,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:38,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91657309] [2022-07-19 21:04:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:38,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:38,830 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:38,851 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:38,852 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:38,852 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-19 21:04:38,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-19 21:04:38,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-07-19 21:04:38,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-19 21:04:38,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-19 21:04:38,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-19 21:04:38,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-19 21:04:38,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 21:04:38,853 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-07-19 21:04:38,856 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:04:38,856 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:04:38,881 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:38,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 173 transitions, 436 flow [2022-07-19 21:04:38,894 INFO L129 PetriNetUnfolder]: 19/179 cut-off events. [2022-07-19 21:04:38,894 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:04:38,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 179 events. 19/179 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 350 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 206. Up to 12 conditions per place. [2022-07-19 21:04:38,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 173 transitions, 436 flow [2022-07-19 21:04:38,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 116 transitions, 280 flow [2022-07-19 21:04:38,899 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:38,899 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@21ae5f7b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6549eaf4 [2022-07-19 21:04:38,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-19 21:04:38,901 INFO L129 PetriNetUnfolder]: 4/41 cut-off events. [2022-07-19 21:04:38,901 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:38,901 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:38,902 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] [2022-07-19 21:04:38,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-07-19 21:04:38,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:38,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1240615746, now seen corresponding path program 1 times [2022-07-19 21:04:38,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:38,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23587162] [2022-07-19 21:04:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:38,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:38,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:38,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23587162] [2022-07-19 21:04:38,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23587162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:38,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:38,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:04:38,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257994545] [2022-07-19 21:04:38,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:38,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:04:38,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:38,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:04:38,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:04:38,922 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 173 [2022-07-19 21:04:38,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 116 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:38,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:38,923 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 173 [2022-07-19 21:04:38,923 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand