./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/sigma.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/sigma.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 236a73c15e935747b9f2e95e881c26c921eba2f2ad7a2b23cf05552665b9f683 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 20:59:34,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 20:59:34,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 20:59:34,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 20:59:34,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 20:59:34,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 20:59:34,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 20:59:34,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 20:59:34,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 20:59:34,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 20:59:34,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 20:59:34,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 20:59:34,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 20:59:34,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 20:59:34,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 20:59:34,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 20:59:34,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 20:59:34,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 20:59:34,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 20:59:34,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 20:59:34,483 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 20:59:34,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 20:59:34,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 20:59:34,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 20:59:34,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 20:59:34,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 20:59:34,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 20:59:34,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 20:59:34,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 20:59:34,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 20:59:34,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 20:59:34,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 20:59:34,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 20:59:34,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 20:59:34,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 20:59:34,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 20:59:34,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 20:59:34,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 20:59:34,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 20:59:34,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 20:59:34,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 20:59:34,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 20:59:34,500 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 20:59:34,518 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 20:59:34,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 20:59:34,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 20:59:34,522 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 20:59:34,522 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 20:59:34,522 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 20:59:34,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 20:59:34,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 20:59:34,523 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 20:59:34,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 20:59:34,524 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 20:59:34,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 20:59:34,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 20:59:34,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 20:59:34,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 20:59:34,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 20:59:34,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 20:59:34,525 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 20:59:34,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 20:59:34,526 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 20:59:34,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 20:59:34,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 20:59:34,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 20:59:34,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 20:59:34,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:59:34,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 20:59:34,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 20:59:34,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 20:59:34,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 20:59:34,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 20:59:34,528 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 20:59:34,528 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 20:59:34,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 20:59:34,528 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 236a73c15e935747b9f2e95e881c26c921eba2f2ad7a2b23cf05552665b9f683 [2022-07-19 20:59:34,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 20:59:34,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 20:59:34,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 20:59:34,721 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 20:59:34,722 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 20:59:34,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/sigma.i [2022-07-19 20:59:34,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9dc05538/7df89b26dc59435f9c16a429fab16872/FLAG3f4ba1412 [2022-07-19 20:59:35,227 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 20:59:35,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/sigma.i [2022-07-19 20:59:35,242 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9dc05538/7df89b26dc59435f9c16a429fab16872/FLAG3f4ba1412 [2022-07-19 20:59:35,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9dc05538/7df89b26dc59435f9c16a429fab16872 [2022-07-19 20:59:35,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 20:59:35,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 20:59:35,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 20:59:35,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 20:59:35,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 20:59:35,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:59:35" (1/1) ... [2022-07-19 20:59:35,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@219275f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:59:35, skipping insertion in model container [2022-07-19 20:59:35,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:59:35" (1/1) ... [2022-07-19 20:59:35,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 20:59:35,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 20:59:35,624 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/sigma.i[55285,55298] [2022-07-19 20:59:35,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:59:35,643 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 20:59:35,674 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/sigma.i[55285,55298] [2022-07-19 20:59:35,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:59:35,722 INFO L208 MainTranslator]: Completed translation [2022-07-19 20:59:35,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:59:35 WrapperNode [2022-07-19 20:59:35,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 20:59:35,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 20:59:35,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 20:59:35,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 20:59:35,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:59:35" (1/1) ... [2022-07-19 20:59:35,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:59:35" (1/1) ... [2022-07-19 20:59:35,777 INFO L137 Inliner]: procedures = 323, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 88 [2022-07-19 20:59:35,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 20:59:35,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 20:59:35,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 20:59:35,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 20:59:35,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:59:35" (1/1) ... [2022-07-19 20:59:35,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:59:35" (1/1) ... [2022-07-19 20:59:35,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:59:35" (1/1) ... [2022-07-19 20:59:35,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:59:35" (1/1) ... [2022-07-19 20:59:35,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:59:35" (1/1) ... [2022-07-19 20:59:35,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:59:35" (1/1) ... [2022-07-19 20:59:35,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:59:35" (1/1) ... [2022-07-19 20:59:35,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 20:59:35,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 20:59:35,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 20:59:35,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 20:59:35,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:59:35" (1/1) ... [2022-07-19 20:59:35,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:59:35,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:59:35,845 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 20:59:35,849 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 20:59:35,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 20:59:35,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 20:59:35,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 20:59:35,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 20:59:35,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 20:59:35,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 20:59:35,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 20:59:35,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 20:59:35,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 20:59:35,868 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-07-19 20:59:35,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-07-19 20:59:35,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 20:59:35,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 20:59:35,869 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 20:59:35,944 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 20:59:35,945 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 20:59:36,120 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 20:59:36,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 20:59:36,126 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 20:59:36,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:59:36 BoogieIcfgContainer [2022-07-19 20:59:36,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 20:59:36,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 20:59:36,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 20:59:36,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 20:59:36,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:59:35" (1/3) ... [2022-07-19 20:59:36,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e90bdb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:59:36, skipping insertion in model container [2022-07-19 20:59:36,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:59:35" (2/3) ... [2022-07-19 20:59:36,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e90bdb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:59:36, skipping insertion in model container [2022-07-19 20:59:36,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:59:36" (3/3) ... [2022-07-19 20:59:36,134 INFO L111 eAbstractionObserver]: Analyzing ICFG sigma.i [2022-07-19 20:59:36,138 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 20:59:36,144 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 20:59:36,144 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 20:59:36,144 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 20:59:36,168 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 20:59:36,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 104 transitions, 216 flow [2022-07-19 20:59:36,224 INFO L129 PetriNetUnfolder]: 13/147 cut-off events. [2022-07-19 20:59:36,225 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 20:59:36,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 147 events. 13/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 225 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2022-07-19 20:59:36,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 104 transitions, 216 flow [2022-07-19 20:59:36,230 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 94 transitions, 196 flow [2022-07-19 20:59:36,236 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:59:36,243 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@10267f85, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71b028f4 [2022-07-19 20:59:36,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:59:36,256 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-07-19 20:59:36,257 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 20:59:36,257 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:36,257 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:36,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:36,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1933087549, now seen corresponding path program 1 times [2022-07-19 20:59:36,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:36,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248767797] [2022-07-19 20:59:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:36,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:36,418 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 20:59:36,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:36,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248767797] [2022-07-19 20:59:36,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248767797] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:36,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:36,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 20:59:36,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426690962] [2022-07-19 20:59:36,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:36,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 20:59:36,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:36,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 20:59:36,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 20:59:36,446 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 104 [2022-07-19 20:59:36,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 196 flow. Second operand has 2 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 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 20:59:36,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:36,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 104 [2022-07-19 20:59:36,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:36,470 INFO L129 PetriNetUnfolder]: 3/119 cut-off events. [2022-07-19 20:59:36,470 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 20:59:36,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 119 events. 3/119 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 152 event pairs, 0 based on Foata normal form. 8/119 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2022-07-19 20:59:36,483 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 2 selfloop transitions, 0 changer transitions 2/89 dead transitions. [2022-07-19 20:59:36,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 89 transitions, 190 flow [2022-07-19 20:59:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 20:59:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 20:59:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 197 transitions. [2022-07-19 20:59:36,494 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9471153846153846 [2022-07-19 20:59:36,494 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 197 transitions. [2022-07-19 20:59:36,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 197 transitions. [2022-07-19 20:59:36,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:36,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 197 transitions. [2022-07-19 20:59:36,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 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 20:59:36,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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 20:59:36,515 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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 20:59:36,517 INFO L186 Difference]: Start difference. First operand has 90 places, 94 transitions, 196 flow. Second operand 2 states and 197 transitions. [2022-07-19 20:59:36,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 89 transitions, 190 flow [2022-07-19 20:59:36,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 89 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:36,524 INFO L242 Difference]: Finished difference. Result has 91 places, 87 transitions, 182 flow [2022-07-19 20:59:36,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2022-07-19 20:59:36,531 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2022-07-19 20:59:36,532 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 182 flow [2022-07-19 20:59:36,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 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 20:59:36,532 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:36,533 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:36,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 20:59:36,533 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:36,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:36,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1541806852, now seen corresponding path program 1 times [2022-07-19 20:59:36,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:36,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910056655] [2022-07-19 20:59:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:36,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:36,650 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 20:59:36,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:36,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910056655] [2022-07-19 20:59:36,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910056655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:36,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:36,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:59:36,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517650441] [2022-07-19 20:59:36,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:36,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:59:36,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:36,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:59:36,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:59:36,654 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 104 [2022-07-19 20:59:36,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 20:59:36,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:36,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 104 [2022-07-19 20:59:36,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:36,702 INFO L129 PetriNetUnfolder]: 1/98 cut-off events. [2022-07-19 20:59:36,702 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 20:59:36,703 INFO L84 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 98 events. 1/98 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 38 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 132. Up to 20 conditions per place. [2022-07-19 20:59:36,703 INFO L132 encePairwiseOnDemand]: 97/104 looper letters, 23 selfloop transitions, 5 changer transitions 2/91 dead transitions. [2022-07-19 20:59:36,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 91 transitions, 250 flow [2022-07-19 20:59:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 20:59:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 20:59:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2022-07-19 20:59:36,706 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7596153846153846 [2022-07-19 20:59:36,706 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 316 transitions. [2022-07-19 20:59:36,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 316 transitions. [2022-07-19 20:59:36,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:36,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 316 transitions. [2022-07-19 20:59:36,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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 20:59:36,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:36,715 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:36,715 INFO L186 Difference]: Start difference. First operand has 91 places, 87 transitions, 182 flow. Second operand 4 states and 316 transitions. [2022-07-19 20:59:36,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 91 transitions, 250 flow [2022-07-19 20:59:36,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 91 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:36,718 INFO L242 Difference]: Finished difference. Result has 93 places, 87 transitions, 200 flow [2022-07-19 20:59:36,719 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=93, PETRI_TRANSITIONS=87} [2022-07-19 20:59:36,719 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 3 predicate places. [2022-07-19 20:59:36,719 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 200 flow [2022-07-19 20:59:36,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 20:59:36,720 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:36,720 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:36,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 20:59:36,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:36,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:36,723 INFO L85 PathProgramCache]: Analyzing trace with hash 190155836, now seen corresponding path program 1 times [2022-07-19 20:59:36,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:36,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802694656] [2022-07-19 20:59:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:36,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:36,785 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 20:59:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:36,832 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 20:59:36,833 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 20:59:36,833 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 20:59:36,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 20:59:36,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 20:59:36,835 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 20:59:36,837 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 20:59:36,837 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 20:59:36,848 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 20:59:36,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 106 places, 110 transitions, 238 flow [2022-07-19 20:59:36,877 INFO L129 PetriNetUnfolder]: 24/246 cut-off events. [2022-07-19 20:59:36,887 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 20:59:36,888 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 24/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 490 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2022-07-19 20:59:36,889 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 110 transitions, 238 flow [2022-07-19 20:59:36,890 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 100 transitions, 218 flow [2022-07-19 20:59:36,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:59:36,894 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@10267f85, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71b028f4 [2022-07-19 20:59:36,897 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:59:36,905 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-19 20:59:36,905 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 20:59:36,905 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:36,905 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:36,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:36,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:36,906 INFO L85 PathProgramCache]: Analyzing trace with hash -282255285, now seen corresponding path program 1 times [2022-07-19 20:59:36,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:36,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970760921] [2022-07-19 20:59:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:36,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:36,931 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 20:59:36,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:36,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970760921] [2022-07-19 20:59:36,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970760921] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:36,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:36,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 20:59:36,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657245038] [2022-07-19 20:59:36,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:36,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 20:59:36,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:36,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 20:59:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 20:59:36,934 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 110 [2022-07-19 20:59:36,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 100 transitions, 218 flow. Second operand has 2 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:36,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:36,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 110 [2022-07-19 20:59:36,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:36,973 INFO L129 PetriNetUnfolder]: 7/193 cut-off events. [2022-07-19 20:59:36,973 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-19 20:59:36,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 193 events. 7/193 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 327 event pairs, 0 based on Foata normal form. 13/193 useless extension candidates. Maximal degree in co-relation 123. Up to 8 conditions per place. [2022-07-19 20:59:36,974 INFO L132 encePairwiseOnDemand]: 105/110 looper letters, 4 selfloop transitions, 0 changer transitions 2/95 dead transitions. [2022-07-19 20:59:36,974 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 216 flow [2022-07-19 20:59:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 20:59:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 20:59:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 207 transitions. [2022-07-19 20:59:36,979 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9409090909090909 [2022-07-19 20:59:36,979 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 207 transitions. [2022-07-19 20:59:36,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 207 transitions. [2022-07-19 20:59:36,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:36,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 207 transitions. [2022-07-19 20:59:36,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 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 20:59:36,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 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 20:59:36,982 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 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 20:59:36,982 INFO L186 Difference]: Start difference. First operand has 97 places, 100 transitions, 218 flow. Second operand 2 states and 207 transitions. [2022-07-19 20:59:36,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 216 flow [2022-07-19 20:59:36,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 95 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:36,985 INFO L242 Difference]: Finished difference. Result has 98 places, 93 transitions, 204 flow [2022-07-19 20:59:36,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2022-07-19 20:59:36,986 INFO L279 CegarLoopForPetriNet]: 97 programPoint places, 1 predicate places. [2022-07-19 20:59:36,986 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 204 flow [2022-07-19 20:59:36,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:36,987 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:36,987 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:36,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 20:59:36,987 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:36,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:36,987 INFO L85 PathProgramCache]: Analyzing trace with hash -153172566, now seen corresponding path program 1 times [2022-07-19 20:59:36,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:36,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792079707] [2022-07-19 20:59:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:36,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:37,048 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 20:59:37,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:37,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792079707] [2022-07-19 20:59:37,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792079707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:37,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:37,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:59:37,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228467361] [2022-07-19 20:59:37,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:37,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:59:37,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:37,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:59:37,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:59:37,050 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 110 [2022-07-19 20:59:37,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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 20:59:37,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:37,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 110 [2022-07-19 20:59:37,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:37,120 INFO L129 PetriNetUnfolder]: 5/180 cut-off events. [2022-07-19 20:59:37,120 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 20:59:37,121 INFO L84 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 180 events. 5/180 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 314 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 261. Up to 52 conditions per place. [2022-07-19 20:59:37,121 INFO L132 encePairwiseOnDemand]: 103/110 looper letters, 33 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2022-07-19 20:59:37,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 103 transitions, 306 flow [2022-07-19 20:59:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 20:59:37,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 20:59:37,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 340 transitions. [2022-07-19 20:59:37,123 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7727272727272727 [2022-07-19 20:59:37,123 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 340 transitions. [2022-07-19 20:59:37,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 340 transitions. [2022-07-19 20:59:37,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:37,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 340 transitions. [2022-07-19 20:59:37,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.0) internal successors, (340), 4 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 20:59:37,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 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 20:59:37,126 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 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 20:59:37,126 INFO L186 Difference]: Start difference. First operand has 98 places, 93 transitions, 204 flow. Second operand 4 states and 340 transitions. [2022-07-19 20:59:37,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 103 transitions, 306 flow [2022-07-19 20:59:37,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 103 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:37,129 INFO L242 Difference]: Finished difference. Result has 100 places, 95 transitions, 230 flow [2022-07-19 20:59:37,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=100, PETRI_TRANSITIONS=95} [2022-07-19 20:59:37,130 INFO L279 CegarLoopForPetriNet]: 97 programPoint places, 3 predicate places. [2022-07-19 20:59:37,130 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 230 flow [2022-07-19 20:59:37,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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 20:59:37,131 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:37,131 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:37,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 20:59:37,131 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:37,132 INFO L85 PathProgramCache]: Analyzing trace with hash -571975030, now seen corresponding path program 1 times [2022-07-19 20:59:37,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:37,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272253031] [2022-07-19 20:59:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:37,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:37,203 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 20:59:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:37,230 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 20:59:37,230 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 20:59:37,231 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 20:59:37,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 20:59:37,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 20:59:37,231 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 20:59:37,232 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 20:59:37,232 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 20:59:37,241 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 20:59:37,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 113 places, 116 transitions, 262 flow [2022-07-19 20:59:37,265 INFO L129 PetriNetUnfolder]: 46/424 cut-off events. [2022-07-19 20:59:37,265 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-19 20:59:37,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 424 events. 46/424 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1172 event pairs, 1 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2022-07-19 20:59:37,266 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 116 transitions, 262 flow [2022-07-19 20:59:37,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 242 flow [2022-07-19 20:59:37,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:59:37,268 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@10267f85, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71b028f4 [2022-07-19 20:59:37,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:59:37,276 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-19 20:59:37,277 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 20:59:37,277 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:37,278 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:37,278 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:37,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:37,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1231702782, now seen corresponding path program 1 times [2022-07-19 20:59:37,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:37,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982885843] [2022-07-19 20:59:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:37,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:37,320 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 20:59:37,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:37,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982885843] [2022-07-19 20:59:37,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982885843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:37,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:37,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 20:59:37,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507262344] [2022-07-19 20:59:37,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:37,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 20:59:37,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 20:59:37,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 20:59:37,323 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 116 [2022-07-19 20:59:37,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 242 flow. Second operand has 2 states, 2 states have (on average 104.0) internal successors, (208), 2 states have internal predecessors, (208), 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 20:59:37,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:37,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 116 [2022-07-19 20:59:37,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:37,353 INFO L129 PetriNetUnfolder]: 16/322 cut-off events. [2022-07-19 20:59:37,354 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-19 20:59:37,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 322 events. 16/322 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 764 event pairs, 1 based on Foata normal form. 22/322 useless extension candidates. Maximal degree in co-relation 207. Up to 16 conditions per place. [2022-07-19 20:59:37,355 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 6 selfloop transitions, 0 changer transitions 2/101 dead transitions. [2022-07-19 20:59:37,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 101 transitions, 244 flow [2022-07-19 20:59:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 20:59:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 20:59:37,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 217 transitions. [2022-07-19 20:59:37,357 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9353448275862069 [2022-07-19 20:59:37,357 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 217 transitions. [2022-07-19 20:59:37,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 217 transitions. [2022-07-19 20:59:37,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:37,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 217 transitions. [2022-07-19 20:59:37,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 108.5) internal successors, (217), 2 states have internal predecessors, (217), 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 20:59:37,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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 20:59:37,359 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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 20:59:37,359 INFO L186 Difference]: Start difference. First operand has 104 places, 106 transitions, 242 flow. Second operand 2 states and 217 transitions. [2022-07-19 20:59:37,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 101 transitions, 244 flow [2022-07-19 20:59:37,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 101 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:37,363 INFO L242 Difference]: Finished difference. Result has 105 places, 99 transitions, 228 flow [2022-07-19 20:59:37,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=228, PETRI_PLACES=105, PETRI_TRANSITIONS=99} [2022-07-19 20:59:37,365 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2022-07-19 20:59:37,365 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 99 transitions, 228 flow [2022-07-19 20:59:37,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 104.0) internal successors, (208), 2 states have internal predecessors, (208), 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 20:59:37,366 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:37,366 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:37,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 20:59:37,368 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:37,368 INFO L85 PathProgramCache]: Analyzing trace with hash -2046678114, now seen corresponding path program 1 times [2022-07-19 20:59:37,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:37,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636553514] [2022-07-19 20:59:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:37,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:37,424 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 20:59:37,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:37,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636553514] [2022-07-19 20:59:37,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636553514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:37,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:37,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:59:37,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98119426] [2022-07-19 20:59:37,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:37,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:59:37,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:37,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:59:37,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:59:37,434 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 116 [2022-07-19 20:59:37,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 99 transitions, 228 flow. Second operand has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 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 20:59:37,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:37,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 116 [2022-07-19 20:59:37,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:37,520 INFO L129 PetriNetUnfolder]: 15/322 cut-off events. [2022-07-19 20:59:37,520 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-19 20:59:37,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 322 events. 15/322 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 921 event pairs, 0 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 489. Up to 114 conditions per place. [2022-07-19 20:59:37,521 INFO L132 encePairwiseOnDemand]: 109/116 looper letters, 36 selfloop transitions, 5 changer transitions 0/110 dead transitions. [2022-07-19 20:59:37,521 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 341 flow [2022-07-19 20:59:37,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 20:59:37,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 20:59:37,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 359 transitions. [2022-07-19 20:59:37,523 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7737068965517241 [2022-07-19 20:59:37,523 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 359 transitions. [2022-07-19 20:59:37,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 359 transitions. [2022-07-19 20:59:37,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:37,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 359 transitions. [2022-07-19 20:59:37,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 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 20:59:37,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 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 20:59:37,526 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 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 20:59:37,526 INFO L186 Difference]: Start difference. First operand has 105 places, 99 transitions, 228 flow. Second operand 4 states and 359 transitions. [2022-07-19 20:59:37,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 341 flow [2022-07-19 20:59:37,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 110 transitions, 341 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:37,529 INFO L242 Difference]: Finished difference. Result has 107 places, 101 transitions, 254 flow [2022-07-19 20:59:37,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2022-07-19 20:59:37,532 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 3 predicate places. [2022-07-19 20:59:37,532 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 254 flow [2022-07-19 20:59:37,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 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 20:59:37,533 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:37,533 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:37,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 20:59:37,533 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1460763493, now seen corresponding path program 1 times [2022-07-19 20:59:37,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:37,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106556495] [2022-07-19 20:59:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:37,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:37,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:37,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106556495] [2022-07-19 20:59:37,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106556495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:37,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:37,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:59:37,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74545342] [2022-07-19 20:59:37,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:37,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:59:37,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:37,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:59:37,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:59:37,616 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 116 [2022-07-19 20:59:37,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 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 20:59:37,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:37,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 116 [2022-07-19 20:59:37,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:37,693 INFO L129 PetriNetUnfolder]: 15/364 cut-off events. [2022-07-19 20:59:37,693 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-19 20:59:37,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 364 events. 15/364 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1109 event pairs, 0 based on Foata normal form. 0/357 useless extension candidates. Maximal degree in co-relation 616. Up to 122 conditions per place. [2022-07-19 20:59:37,694 INFO L132 encePairwiseOnDemand]: 106/116 looper letters, 40 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2022-07-19 20:59:37,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 389 flow [2022-07-19 20:59:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:59:37,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 20:59:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 506 transitions. [2022-07-19 20:59:37,696 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7270114942528736 [2022-07-19 20:59:37,696 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 506 transitions. [2022-07-19 20:59:37,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 506 transitions. [2022-07-19 20:59:37,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:37,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 506 transitions. [2022-07-19 20:59:37,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 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 20:59:37,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 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 20:59:37,699 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 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 20:59:37,699 INFO L186 Difference]: Start difference. First operand has 107 places, 101 transitions, 254 flow. Second operand 6 states and 506 transitions. [2022-07-19 20:59:37,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 389 flow [2022-07-19 20:59:37,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 383 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 20:59:37,701 INFO L242 Difference]: Finished difference. Result has 112 places, 103 transitions, 284 flow [2022-07-19 20:59:37,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=112, PETRI_TRANSITIONS=103} [2022-07-19 20:59:37,702 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 8 predicate places. [2022-07-19 20:59:37,702 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 103 transitions, 284 flow [2022-07-19 20:59:37,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 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 20:59:37,702 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:37,703 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:37,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 20:59:37,703 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:37,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:37,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1914262696, now seen corresponding path program 1 times [2022-07-19 20:59:37,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:37,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391696810] [2022-07-19 20:59:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:37,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:37,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:37,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391696810] [2022-07-19 20:59:37,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391696810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:59:37,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279188685] [2022-07-19 20:59:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:37,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:59:37,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:59:37,763 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 20:59:37,787 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 20:59:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:37,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 20:59:37,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:59:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:38,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:59:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:38,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279188685] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:59:38,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:59:38,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-19 20:59:38,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341246958] [2022-07-19 20:59:38,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:59:38,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 20:59:38,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:38,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 20:59:38,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-19 20:59:38,104 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 116 [2022-07-19 20:59:38,105 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 103 transitions, 284 flow. Second operand has 13 states, 13 states have (on average 81.6923076923077) internal successors, (1062), 13 states have internal predecessors, (1062), 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 20:59:38,105 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:38,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 116 [2022-07-19 20:59:38,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:38,255 INFO L129 PetriNetUnfolder]: 12/339 cut-off events. [2022-07-19 20:59:38,256 INFO L130 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2022-07-19 20:59:38,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 339 events. 12/339 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 951 event pairs, 1 based on Foata normal form. 2/341 useless extension candidates. Maximal degree in co-relation 611. Up to 76 conditions per place. [2022-07-19 20:59:38,257 INFO L132 encePairwiseOnDemand]: 104/116 looper letters, 33 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2022-07-19 20:59:38,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 119 transitions, 427 flow [2022-07-19 20:59:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:59:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 20:59:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 831 transitions. [2022-07-19 20:59:38,259 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7163793103448276 [2022-07-19 20:59:38,259 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 831 transitions. [2022-07-19 20:59:38,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 831 transitions. [2022-07-19 20:59:38,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:38,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 831 transitions. [2022-07-19 20:59:38,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 83.1) internal successors, (831), 10 states have internal predecessors, (831), 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 20:59:38,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 116.0) internal successors, (1276), 11 states have internal predecessors, (1276), 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 20:59:38,263 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 116.0) internal successors, (1276), 11 states have internal predecessors, (1276), 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 20:59:38,263 INFO L186 Difference]: Start difference. First operand has 112 places, 103 transitions, 284 flow. Second operand 10 states and 831 transitions. [2022-07-19 20:59:38,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 119 transitions, 427 flow [2022-07-19 20:59:38,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 119 transitions, 417 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 20:59:38,266 INFO L242 Difference]: Finished difference. Result has 121 places, 110 transitions, 357 flow [2022-07-19 20:59:38,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=357, PETRI_PLACES=121, PETRI_TRANSITIONS=110} [2022-07-19 20:59:38,266 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 17 predicate places. [2022-07-19 20:59:38,266 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 110 transitions, 357 flow [2022-07-19 20:59:38,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 81.6923076923077) internal successors, (1062), 13 states have internal predecessors, (1062), 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 20:59:38,267 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:38,267 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:38,286 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 20:59:38,483 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 20:59:38,486 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:38,486 INFO L85 PathProgramCache]: Analyzing trace with hash 929108029, now seen corresponding path program 1 times [2022-07-19 20:59:38,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:38,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269440460] [2022-07-19 20:59:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:38,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:38,514 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 20:59:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:38,549 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 20:59:38,549 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 20:59:38,549 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 20:59:38,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 20:59:38,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 20:59:38,550 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 20:59:38,550 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 20:59:38,550 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 20:59:38,559 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 20:59:38,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 120 places, 122 transitions, 288 flow [2022-07-19 20:59:38,602 INFO L129 PetriNetUnfolder]: 92/762 cut-off events. [2022-07-19 20:59:38,602 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-19 20:59:38,603 INFO L84 FinitePrefix]: Finished finitePrefix Result has 817 conditions, 762 events. 92/762 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3016 event pairs, 6 based on Foata normal form. 0/654 useless extension candidates. Maximal degree in co-relation 444. Up to 32 conditions per place. [2022-07-19 20:59:38,603 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 122 transitions, 288 flow [2022-07-19 20:59:38,605 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 112 transitions, 268 flow [2022-07-19 20:59:38,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:59:38,606 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@10267f85, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71b028f4 [2022-07-19 20:59:38,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:59:38,613 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-07-19 20:59:38,613 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 20:59:38,613 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:38,614 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:38,614 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:38,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:38,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1238528377, now seen corresponding path program 1 times [2022-07-19 20:59:38,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:38,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369994941] [2022-07-19 20:59:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:38,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:38,626 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 20:59:38,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:38,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369994941] [2022-07-19 20:59:38,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369994941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:38,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:38,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 20:59:38,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188296892] [2022-07-19 20:59:38,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:38,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 20:59:38,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:38,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 20:59:38,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 20:59:38,628 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 122 [2022-07-19 20:59:38,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 112 transitions, 268 flow. Second operand has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 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 20:59:38,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:38,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 122 [2022-07-19 20:59:38,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:38,668 INFO L129 PetriNetUnfolder]: 37/563 cut-off events. [2022-07-19 20:59:38,669 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-07-19 20:59:38,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 563 events. 37/563 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1992 event pairs, 6 based on Foata normal form. 39/563 useless extension candidates. Maximal degree in co-relation 357. Up to 37 conditions per place. [2022-07-19 20:59:38,671 INFO L132 encePairwiseOnDemand]: 117/122 looper letters, 8 selfloop transitions, 0 changer transitions 2/107 dead transitions. [2022-07-19 20:59:38,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 107 transitions, 274 flow [2022-07-19 20:59:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 20:59:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 20:59:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 227 transitions. [2022-07-19 20:59:38,672 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.930327868852459 [2022-07-19 20:59:38,672 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 227 transitions. [2022-07-19 20:59:38,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 227 transitions. [2022-07-19 20:59:38,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:38,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 227 transitions. [2022-07-19 20:59:38,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.5) internal successors, (227), 2 states have internal predecessors, (227), 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 20:59:38,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 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 20:59:38,673 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 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 20:59:38,674 INFO L186 Difference]: Start difference. First operand has 111 places, 112 transitions, 268 flow. Second operand 2 states and 227 transitions. [2022-07-19 20:59:38,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 107 transitions, 274 flow [2022-07-19 20:59:38,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 107 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:38,675 INFO L242 Difference]: Finished difference. Result has 112 places, 105 transitions, 254 flow [2022-07-19 20:59:38,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=254, PETRI_PLACES=112, PETRI_TRANSITIONS=105} [2022-07-19 20:59:38,676 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 1 predicate places. [2022-07-19 20:59:38,676 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 105 transitions, 254 flow [2022-07-19 20:59:38,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 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 20:59:38,676 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:38,677 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:38,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 20:59:38,677 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1367611096, now seen corresponding path program 1 times [2022-07-19 20:59:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:38,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201024298] [2022-07-19 20:59:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:38,702 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 20:59:38,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:38,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201024298] [2022-07-19 20:59:38,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201024298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:38,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:38,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:59:38,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491541575] [2022-07-19 20:59:38,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:38,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:59:38,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:59:38,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:59:38,704 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 122 [2022-07-19 20:59:38,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 105 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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 20:59:38,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:38,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 122 [2022-07-19 20:59:38,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:38,781 INFO L129 PetriNetUnfolder]: 38/581 cut-off events. [2022-07-19 20:59:38,781 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-19 20:59:38,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 918 conditions, 581 events. 38/581 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2312 event pairs, 1 based on Foata normal form. 0/547 useless extension candidates. Maximal degree in co-relation 911. Up to 237 conditions per place. [2022-07-19 20:59:38,783 INFO L132 encePairwiseOnDemand]: 115/122 looper letters, 39 selfloop transitions, 5 changer transitions 0/117 dead transitions. [2022-07-19 20:59:38,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 117 transitions, 378 flow [2022-07-19 20:59:38,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 20:59:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 20:59:38,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 378 transitions. [2022-07-19 20:59:38,785 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7745901639344263 [2022-07-19 20:59:38,785 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 378 transitions. [2022-07-19 20:59:38,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 378 transitions. [2022-07-19 20:59:38,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:38,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 378 transitions. [2022-07-19 20:59:38,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.5) internal successors, (378), 4 states have internal predecessors, (378), 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 20:59:38,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 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 20:59:38,787 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 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 20:59:38,787 INFO L186 Difference]: Start difference. First operand has 112 places, 105 transitions, 254 flow. Second operand 4 states and 378 transitions. [2022-07-19 20:59:38,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 117 transitions, 378 flow [2022-07-19 20:59:38,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 117 transitions, 378 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:38,789 INFO L242 Difference]: Finished difference. Result has 114 places, 107 transitions, 280 flow [2022-07-19 20:59:38,789 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=280, PETRI_PLACES=114, PETRI_TRANSITIONS=107} [2022-07-19 20:59:38,790 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 3 predicate places. [2022-07-19 20:59:38,790 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 107 transitions, 280 flow [2022-07-19 20:59:38,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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 20:59:38,790 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:38,790 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:38,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 20:59:38,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:38,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:38,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2116980692, now seen corresponding path program 1 times [2022-07-19 20:59:38,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:38,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85061113] [2022-07-19 20:59:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:38,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:38,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:38,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85061113] [2022-07-19 20:59:38,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85061113] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:38,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:38,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:59:38,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555628428] [2022-07-19 20:59:38,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:38,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:59:38,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:38,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:59:38,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:59:38,843 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 122 [2022-07-19 20:59:38,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 107 transitions, 280 flow. Second operand has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 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 20:59:38,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:38,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 122 [2022-07-19 20:59:38,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:38,955 INFO L129 PetriNetUnfolder]: 38/671 cut-off events. [2022-07-19 20:59:38,955 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-19 20:59:38,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 671 events. 38/671 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2940 event pairs, 1 based on Foata normal form. 0/656 useless extension candidates. Maximal degree in co-relation 1168. Up to 253 conditions per place. [2022-07-19 20:59:38,957 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 43 selfloop transitions, 9 changer transitions 0/122 dead transitions. [2022-07-19 20:59:38,958 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 122 transitions, 426 flow [2022-07-19 20:59:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:59:38,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 20:59:38,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 533 transitions. [2022-07-19 20:59:38,959 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7281420765027322 [2022-07-19 20:59:38,959 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 533 transitions. [2022-07-19 20:59:38,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 533 transitions. [2022-07-19 20:59:38,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:38,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 533 transitions. [2022-07-19 20:59:38,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 88.83333333333333) internal successors, (533), 6 states have internal predecessors, (533), 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 20:59:38,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 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 20:59:38,962 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 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 20:59:38,962 INFO L186 Difference]: Start difference. First operand has 114 places, 107 transitions, 280 flow. Second operand 6 states and 533 transitions. [2022-07-19 20:59:38,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 122 transitions, 426 flow [2022-07-19 20:59:38,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 122 transitions, 420 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 20:59:38,964 INFO L242 Difference]: Finished difference. Result has 119 places, 109 transitions, 310 flow [2022-07-19 20:59:38,965 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=119, PETRI_TRANSITIONS=109} [2022-07-19 20:59:38,965 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 8 predicate places. [2022-07-19 20:59:38,965 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 109 transitions, 310 flow [2022-07-19 20:59:38,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 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 20:59:38,965 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:38,965 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:38,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 20:59:38,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:38,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:38,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1026582369, now seen corresponding path program 1 times [2022-07-19 20:59:38,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:38,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908460259] [2022-07-19 20:59:38,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:38,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:39,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:39,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908460259] [2022-07-19 20:59:39,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908460259] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:59:39,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822218212] [2022-07-19 20:59:39,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:39,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:59:39,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:59:39,011 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 20:59:39,012 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 20:59:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:39,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 20:59:39,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:59:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:39,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:59:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:39,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822218212] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:59:39,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:59:39,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-19 20:59:39,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552725972] [2022-07-19 20:59:39,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:59:39,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 20:59:39,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:39,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 20:59:39,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-19 20:59:39,281 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 122 [2022-07-19 20:59:39,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 109 transitions, 310 flow. Second operand has 13 states, 13 states have (on average 85.6923076923077) internal successors, (1114), 13 states have internal predecessors, (1114), 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 20:59:39,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:39,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 122 [2022-07-19 20:59:39,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:39,458 INFO L129 PetriNetUnfolder]: 35/646 cut-off events. [2022-07-19 20:59:39,458 INFO L130 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2022-07-19 20:59:39,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1228 conditions, 646 events. 35/646 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3098 event pairs, 2 based on Foata normal form. 2/648 useless extension candidates. Maximal degree in co-relation 1217. Up to 170 conditions per place. [2022-07-19 20:59:39,461 INFO L132 encePairwiseOnDemand]: 110/122 looper letters, 36 selfloop transitions, 17 changer transitions 0/126 dead transitions. [2022-07-19 20:59:39,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 126 transitions, 464 flow [2022-07-19 20:59:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:59:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 20:59:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 874 transitions. [2022-07-19 20:59:39,463 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7163934426229508 [2022-07-19 20:59:39,463 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 874 transitions. [2022-07-19 20:59:39,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 874 transitions. [2022-07-19 20:59:39,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:39,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 874 transitions. [2022-07-19 20:59:39,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 87.4) internal successors, (874), 10 states have internal predecessors, (874), 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 20:59:39,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 122.0) internal successors, (1342), 11 states have internal predecessors, (1342), 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 20:59:39,467 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 122.0) internal successors, (1342), 11 states have internal predecessors, (1342), 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 20:59:39,467 INFO L186 Difference]: Start difference. First operand has 119 places, 109 transitions, 310 flow. Second operand 10 states and 874 transitions. [2022-07-19 20:59:39,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 126 transitions, 464 flow [2022-07-19 20:59:39,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 126 transitions, 454 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 20:59:39,469 INFO L242 Difference]: Finished difference. Result has 128 places, 116 transitions, 383 flow [2022-07-19 20:59:39,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=383, PETRI_PLACES=128, PETRI_TRANSITIONS=116} [2022-07-19 20:59:39,470 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 17 predicate places. [2022-07-19 20:59:39,470 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 116 transitions, 383 flow [2022-07-19 20:59:39,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 85.6923076923077) internal successors, (1114), 13 states have internal predecessors, (1114), 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 20:59:39,471 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:39,471 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:39,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 20:59:39,697 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 20:59:39,697 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:39,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1600686865, now seen corresponding path program 1 times [2022-07-19 20:59:39,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:39,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010381562] [2022-07-19 20:59:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:39,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:39,725 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 20:59:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:39,771 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 20:59:39,772 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 20:59:39,772 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 20:59:39,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 20:59:39,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 20:59:39,772 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 20:59:39,772 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 20:59:39,772 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 20:59:39,781 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-19 20:59:39,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 127 places, 128 transitions, 316 flow [2022-07-19 20:59:39,868 INFO L129 PetriNetUnfolder]: 190/1424 cut-off events. [2022-07-19 20:59:39,869 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-19 20:59:39,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1535 conditions, 1424 events. 190/1424 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 7590 event pairs, 23 based on Foata normal form. 0/1218 useless extension candidates. Maximal degree in co-relation 807. Up to 80 conditions per place. [2022-07-19 20:59:39,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 128 transitions, 316 flow [2022-07-19 20:59:39,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 118 transitions, 296 flow [2022-07-19 20:59:39,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:59:39,875 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@10267f85, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71b028f4 [2022-07-19 20:59:39,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:59:39,878 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-07-19 20:59:39,878 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 20:59:39,878 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:39,878 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:39,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:39,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:39,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1696273977, now seen corresponding path program 1 times [2022-07-19 20:59:39,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:39,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465921794] [2022-07-19 20:59:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:39,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:39,890 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 20:59:39,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:39,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465921794] [2022-07-19 20:59:39,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465921794] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:39,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:39,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 20:59:39,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473169567] [2022-07-19 20:59:39,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:39,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 20:59:39,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:39,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 20:59:39,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 20:59:39,891 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 128 [2022-07-19 20:59:39,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 118 transitions, 296 flow. Second operand has 2 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 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 20:59:39,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:39,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 128 [2022-07-19 20:59:39,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:39,968 INFO L129 PetriNetUnfolder]: 86/1032 cut-off events. [2022-07-19 20:59:39,968 INFO L130 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2022-07-19 20:59:39,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1229 conditions, 1032 events. 86/1032 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4953 event pairs, 23 based on Foata normal form. 72/1032 useless extension candidates. Maximal degree in co-relation 644. Up to 86 conditions per place. [2022-07-19 20:59:39,971 INFO L132 encePairwiseOnDemand]: 123/128 looper letters, 10 selfloop transitions, 0 changer transitions 2/113 dead transitions. [2022-07-19 20:59:39,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 113 transitions, 306 flow [2022-07-19 20:59:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 20:59:39,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 20:59:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 237 transitions. [2022-07-19 20:59:39,972 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.92578125 [2022-07-19 20:59:39,972 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 237 transitions. [2022-07-19 20:59:39,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 237 transitions. [2022-07-19 20:59:39,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:39,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 237 transitions. [2022-07-19 20:59:39,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 118.5) internal successors, (237), 2 states have internal predecessors, (237), 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 20:59:39,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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 20:59:39,973 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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 20:59:39,973 INFO L186 Difference]: Start difference. First operand has 118 places, 118 transitions, 296 flow. Second operand 2 states and 237 transitions. [2022-07-19 20:59:39,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 113 transitions, 306 flow [2022-07-19 20:59:39,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 113 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:39,975 INFO L242 Difference]: Finished difference. Result has 119 places, 111 transitions, 282 flow [2022-07-19 20:59:39,975 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=282, PETRI_PLACES=119, PETRI_TRANSITIONS=111} [2022-07-19 20:59:39,975 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2022-07-19 20:59:39,975 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 111 transitions, 282 flow [2022-07-19 20:59:39,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 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 20:59:39,975 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:39,976 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:39,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 20:59:39,976 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1499760472, now seen corresponding path program 1 times [2022-07-19 20:59:39,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:39,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175649168] [2022-07-19 20:59:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:39,997 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 20:59:39,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:39,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175649168] [2022-07-19 20:59:39,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175649168] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:39,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:39,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:59:39,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769158269] [2022-07-19 20:59:39,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:39,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:59:39,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:39,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:59:39,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:59:39,999 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 128 [2022-07-19 20:59:39,999 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 111 transitions, 282 flow. Second operand has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 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 20:59:39,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:39,999 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 128 [2022-07-19 20:59:39,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:40,109 INFO L129 PetriNetUnfolder]: 90/1073 cut-off events. [2022-07-19 20:59:40,109 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-07-19 20:59:40,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 1073 events. 90/1073 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5631 event pairs, 7 based on Foata normal form. 0/1006 useless extension candidates. Maximal degree in co-relation 1723. Up to 485 conditions per place. [2022-07-19 20:59:40,130 INFO L132 encePairwiseOnDemand]: 121/128 looper letters, 42 selfloop transitions, 5 changer transitions 0/124 dead transitions. [2022-07-19 20:59:40,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 124 transitions, 417 flow [2022-07-19 20:59:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 20:59:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 20:59:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 397 transitions. [2022-07-19 20:59:40,131 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.775390625 [2022-07-19 20:59:40,132 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 397 transitions. [2022-07-19 20:59:40,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 397 transitions. [2022-07-19 20:59:40,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:40,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 397 transitions. [2022-07-19 20:59:40,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 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 20:59:40,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 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 20:59:40,133 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 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 20:59:40,133 INFO L186 Difference]: Start difference. First operand has 119 places, 111 transitions, 282 flow. Second operand 4 states and 397 transitions. [2022-07-19 20:59:40,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 124 transitions, 417 flow [2022-07-19 20:59:40,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 124 transitions, 417 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:40,135 INFO L242 Difference]: Finished difference. Result has 121 places, 113 transitions, 308 flow [2022-07-19 20:59:40,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=308, PETRI_PLACES=121, PETRI_TRANSITIONS=113} [2022-07-19 20:59:40,136 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 3 predicate places. [2022-07-19 20:59:40,136 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 113 transitions, 308 flow [2022-07-19 20:59:40,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 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 20:59:40,136 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:40,136 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:40,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 20:59:40,136 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:40,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:40,137 INFO L85 PathProgramCache]: Analyzing trace with hash 548525699, now seen corresponding path program 1 times [2022-07-19 20:59:40,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:40,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643542780] [2022-07-19 20:59:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:40,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:40,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643542780] [2022-07-19 20:59:40,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643542780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:40,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:40,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:59:40,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812608075] [2022-07-19 20:59:40,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:40,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:59:40,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:40,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:59:40,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:59:40,176 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 128 [2022-07-19 20:59:40,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 113 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 88.8) internal successors, (444), 5 states have internal predecessors, (444), 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 20:59:40,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:40,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 128 [2022-07-19 20:59:40,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:40,324 INFO L129 PetriNetUnfolder]: 90/1259 cut-off events. [2022-07-19 20:59:40,324 INFO L130 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2022-07-19 20:59:40,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2242 conditions, 1259 events. 90/1259 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7292 event pairs, 7 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 2232. Up to 517 conditions per place. [2022-07-19 20:59:40,330 INFO L132 encePairwiseOnDemand]: 118/128 looper letters, 46 selfloop transitions, 9 changer transitions 0/129 dead transitions. [2022-07-19 20:59:40,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 129 transitions, 465 flow [2022-07-19 20:59:40,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:59:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 20:59:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 560 transitions. [2022-07-19 20:59:40,332 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2022-07-19 20:59:40,332 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 560 transitions. [2022-07-19 20:59:40,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 560 transitions. [2022-07-19 20:59:40,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:40,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 560 transitions. [2022-07-19 20:59:40,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.33333333333333) internal successors, (560), 6 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:40,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 128.0) internal successors, (896), 7 states have internal predecessors, (896), 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 20:59:40,335 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 128.0) internal successors, (896), 7 states have internal predecessors, (896), 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 20:59:40,335 INFO L186 Difference]: Start difference. First operand has 121 places, 113 transitions, 308 flow. Second operand 6 states and 560 transitions. [2022-07-19 20:59:40,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 129 transitions, 465 flow [2022-07-19 20:59:40,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 129 transitions, 459 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 20:59:40,361 INFO L242 Difference]: Finished difference. Result has 126 places, 115 transitions, 338 flow [2022-07-19 20:59:40,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=126, PETRI_TRANSITIONS=115} [2022-07-19 20:59:40,362 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 8 predicate places. [2022-07-19 20:59:40,362 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 115 transitions, 338 flow [2022-07-19 20:59:40,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.8) internal successors, (444), 5 states have internal predecessors, (444), 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 20:59:40,362 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:40,362 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:40,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 20:59:40,363 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:40,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash -815664214, now seen corresponding path program 1 times [2022-07-19 20:59:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:40,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814831983] [2022-07-19 20:59:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:40,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:40,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:40,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814831983] [2022-07-19 20:59:40,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814831983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:59:40,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852640178] [2022-07-19 20:59:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:40,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:59:40,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:59:40,406 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 20:59:40,407 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 20:59:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:40,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 20:59:40,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:59:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:40,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:59:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:40,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852640178] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:59:40,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:59:40,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-19 20:59:40,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076582257] [2022-07-19 20:59:40,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:59:40,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 20:59:40,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:40,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 20:59:40,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-19 20:59:40,619 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 128 [2022-07-19 20:59:40,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 115 transitions, 338 flow. Second operand has 13 states, 13 states have (on average 89.6923076923077) internal successors, (1166), 13 states have internal predecessors, (1166), 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 20:59:40,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:40,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 128 [2022-07-19 20:59:40,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:40,814 INFO L129 PetriNetUnfolder]: 87/1234 cut-off events. [2022-07-19 20:59:40,815 INFO L130 PetriNetUnfolder]: For 264/264 co-relation queries the response was YES. [2022-07-19 20:59:40,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2396 conditions, 1234 events. 87/1234 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7541 event pairs, 8 based on Foata normal form. 2/1236 useless extension candidates. Maximal degree in co-relation 2384. Up to 364 conditions per place. [2022-07-19 20:59:40,819 INFO L132 encePairwiseOnDemand]: 116/128 looper letters, 39 selfloop transitions, 17 changer transitions 0/133 dead transitions. [2022-07-19 20:59:40,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 133 transitions, 503 flow [2022-07-19 20:59:40,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:59:40,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 20:59:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 917 transitions. [2022-07-19 20:59:40,822 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.71640625 [2022-07-19 20:59:40,822 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 917 transitions. [2022-07-19 20:59:40,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 917 transitions. [2022-07-19 20:59:40,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:40,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 917 transitions. [2022-07-19 20:59:40,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.7) internal successors, (917), 10 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:59:40,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 128.0) internal successors, (1408), 11 states have internal predecessors, (1408), 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 20:59:40,826 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 128.0) internal successors, (1408), 11 states have internal predecessors, (1408), 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 20:59:40,826 INFO L186 Difference]: Start difference. First operand has 126 places, 115 transitions, 338 flow. Second operand 10 states and 917 transitions. [2022-07-19 20:59:40,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 133 transitions, 503 flow [2022-07-19 20:59:40,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 133 transitions, 493 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 20:59:40,830 INFO L242 Difference]: Finished difference. Result has 135 places, 122 transitions, 411 flow [2022-07-19 20:59:40,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=411, PETRI_PLACES=135, PETRI_TRANSITIONS=122} [2022-07-19 20:59:40,830 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 17 predicate places. [2022-07-19 20:59:40,830 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 122 transitions, 411 flow [2022-07-19 20:59:40,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 89.6923076923077) internal successors, (1166), 13 states have internal predecessors, (1166), 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 20:59:40,831 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:40,831 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:59:40,858 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 20:59:41,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:59:41,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:41,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:41,048 INFO L85 PathProgramCache]: Analyzing trace with hash -396988049, now seen corresponding path program 1 times [2022-07-19 20:59:41,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:41,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076917594] [2022-07-19 20:59:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:41,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-19 20:59:41,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:41,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076917594] [2022-07-19 20:59:41,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076917594] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:59:41,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331534802] [2022-07-19 20:59:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:41,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:59:41,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:59:41,113 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:59:41,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 20:59:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:41,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 20:59:41,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:59:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:41,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:59:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:41,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331534802] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:59:41,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:59:41,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-07-19 20:59:41,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546999645] [2022-07-19 20:59:41,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:59:41,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 20:59:41,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:41,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 20:59:41,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-07-19 20:59:41,563 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 128 [2022-07-19 20:59:41,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 122 transitions, 411 flow. Second operand has 21 states, 21 states have (on average 88.95238095238095) internal successors, (1868), 21 states have internal predecessors, (1868), 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 20:59:41,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:41,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 128 [2022-07-19 20:59:41,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:41,743 INFO L129 PetriNetUnfolder]: 0/143 cut-off events. [2022-07-19 20:59:41,744 INFO L130 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-07-19 20:59:41,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 143 events. 0/143 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 40 event pairs, 0 based on Foata normal form. 3/146 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2022-07-19 20:59:41,744 INFO L132 encePairwiseOnDemand]: 122/128 looper letters, 21 selfloop transitions, 17 changer transitions 0/101 dead transitions. [2022-07-19 20:59:41,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 101 transitions, 402 flow [2022-07-19 20:59:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 20:59:41,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-19 20:59:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1656 transitions. [2022-07-19 20:59:41,747 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.680921052631579 [2022-07-19 20:59:41,747 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1656 transitions. [2022-07-19 20:59:41,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1656 transitions. [2022-07-19 20:59:41,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:41,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1656 transitions. [2022-07-19 20:59:41,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 87.15789473684211) internal successors, (1656), 19 states have internal predecessors, (1656), 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 20:59:41,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 128.0) internal successors, (2560), 20 states have internal predecessors, (2560), 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 20:59:41,754 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 128.0) internal successors, (2560), 20 states have internal predecessors, (2560), 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 20:59:41,754 INFO L186 Difference]: Start difference. First operand has 135 places, 122 transitions, 411 flow. Second operand 19 states and 1656 transitions. [2022-07-19 20:59:41,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 101 transitions, 402 flow [2022-07-19 20:59:41,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 101 transitions, 356 flow, removed 14 selfloop flow, removed 7 redundant places. [2022-07-19 20:59:41,756 INFO L242 Difference]: Finished difference. Result has 119 places, 92 transitions, 286 flow [2022-07-19 20:59:41,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=286, PETRI_PLACES=119, PETRI_TRANSITIONS=92} [2022-07-19 20:59:41,757 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2022-07-19 20:59:41,757 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 92 transitions, 286 flow [2022-07-19 20:59:41,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 88.95238095238095) internal successors, (1868), 21 states have internal predecessors, (1868), 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 20:59:41,757 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:41,758 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:59:41,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 20:59:41,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:59:41,974 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:41,974 INFO L85 PathProgramCache]: Analyzing trace with hash 530958294, now seen corresponding path program 1 times [2022-07-19 20:59:41,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:41,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908968023] [2022-07-19 20:59:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:41,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:42,003 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 20:59:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:42,034 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 20:59:42,034 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 20:59:42,034 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 20:59:42,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 20:59:42,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 20:59:42,035 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 20:59:42,036 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 20:59:42,036 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-19 20:59:42,050 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-19 20:59:42,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 134 transitions, 346 flow [2022-07-19 20:59:42,247 INFO L129 PetriNetUnfolder]: 400/2742 cut-off events. [2022-07-19 20:59:42,247 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-19 20:59:42,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2974 conditions, 2742 events. 400/2742 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 18330 event pairs, 72 based on Foata normal form. 0/2342 useless extension candidates. Maximal degree in co-relation 1523. Up to 192 conditions per place. [2022-07-19 20:59:42,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 134 transitions, 346 flow [2022-07-19 20:59:42,255 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 124 transitions, 326 flow [2022-07-19 20:59:42,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:59:42,256 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@10267f85, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71b028f4 [2022-07-19 20:59:42,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:59:42,259 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-07-19 20:59:42,259 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 20:59:42,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:42,259 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:42,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1953747134, now seen corresponding path program 1 times [2022-07-19 20:59:42,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:42,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072779095] [2022-07-19 20:59:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:42,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:42,271 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 20:59:42,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:42,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072779095] [2022-07-19 20:59:42,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072779095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:42,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:42,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 20:59:42,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292566372] [2022-07-19 20:59:42,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:42,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 20:59:42,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:42,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 20:59:42,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 20:59:42,273 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 134 [2022-07-19 20:59:42,273 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 124 transitions, 326 flow. Second operand has 2 states, 2 states have (on average 116.0) internal successors, (232), 2 states have internal predecessors, (232), 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 20:59:42,273 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:42,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 134 [2022-07-19 20:59:42,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:42,413 INFO L129 PetriNetUnfolder]: 199/1965 cut-off events. [2022-07-19 20:59:42,413 INFO L130 PetriNetUnfolder]: For 647/647 co-relation queries the response was YES. [2022-07-19 20:59:42,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2396 conditions, 1965 events. 199/1965 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 12599 event pairs, 72 based on Foata normal form. 137/1965 useless extension candidates. Maximal degree in co-relation 1216. Up to 199 conditions per place. [2022-07-19 20:59:42,422 INFO L132 encePairwiseOnDemand]: 129/134 looper letters, 12 selfloop transitions, 0 changer transitions 2/119 dead transitions. [2022-07-19 20:59:42,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 119 transitions, 340 flow [2022-07-19 20:59:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 20:59:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 20:59:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 247 transitions. [2022-07-19 20:59:42,423 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9216417910447762 [2022-07-19 20:59:42,423 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 247 transitions. [2022-07-19 20:59:42,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 247 transitions. [2022-07-19 20:59:42,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:42,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 247 transitions. [2022-07-19 20:59:42,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 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 20:59:42,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 20:59:42,424 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 20:59:42,425 INFO L186 Difference]: Start difference. First operand has 125 places, 124 transitions, 326 flow. Second operand 2 states and 247 transitions. [2022-07-19 20:59:42,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 119 transitions, 340 flow [2022-07-19 20:59:42,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 119 transitions, 340 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:42,456 INFO L242 Difference]: Finished difference. Result has 126 places, 117 transitions, 312 flow [2022-07-19 20:59:42,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=312, PETRI_PLACES=126, PETRI_TRANSITIONS=117} [2022-07-19 20:59:42,456 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, 1 predicate places. [2022-07-19 20:59:42,456 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 117 transitions, 312 flow [2022-07-19 20:59:42,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 116.0) internal successors, (232), 2 states have internal predecessors, (232), 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 20:59:42,457 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:42,457 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:42,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 20:59:42,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1650229986, now seen corresponding path program 1 times [2022-07-19 20:59:42,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:42,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943873280] [2022-07-19 20:59:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:42,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:42,477 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 20:59:42,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:42,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943873280] [2022-07-19 20:59:42,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943873280] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:42,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:42,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:59:42,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319726525] [2022-07-19 20:59:42,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:42,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:59:42,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:42,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:59:42,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:59:42,479 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 134 [2022-07-19 20:59:42,479 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 117 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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 20:59:42,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:42,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 134 [2022-07-19 20:59:42,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:42,670 INFO L129 PetriNetUnfolder]: 207/2034 cut-off events. [2022-07-19 20:59:42,670 INFO L130 PetriNetUnfolder]: For 257/257 co-relation queries the response was YES. [2022-07-19 20:59:42,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3338 conditions, 2034 events. 207/2034 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 13474 event pairs, 30 based on Foata normal form. 0/1902 useless extension candidates. Maximal degree in co-relation 3329. Up to 990 conditions per place. [2022-07-19 20:59:42,679 INFO L132 encePairwiseOnDemand]: 127/134 looper letters, 45 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2022-07-19 20:59:42,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 131 transitions, 458 flow [2022-07-19 20:59:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 20:59:42,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 20:59:42,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 416 transitions. [2022-07-19 20:59:42,681 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7761194029850746 [2022-07-19 20:59:42,681 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 416 transitions. [2022-07-19 20:59:42,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 416 transitions. [2022-07-19 20:59:42,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:42,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 416 transitions. [2022-07-19 20:59:42,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 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 20:59:42,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 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 20:59:42,683 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 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 20:59:42,683 INFO L186 Difference]: Start difference. First operand has 126 places, 117 transitions, 312 flow. Second operand 4 states and 416 transitions. [2022-07-19 20:59:42,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 131 transitions, 458 flow [2022-07-19 20:59:42,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 131 transitions, 458 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:42,699 INFO L242 Difference]: Finished difference. Result has 128 places, 119 transitions, 338 flow [2022-07-19 20:59:42,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=338, PETRI_PLACES=128, PETRI_TRANSITIONS=119} [2022-07-19 20:59:42,699 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, 3 predicate places. [2022-07-19 20:59:42,699 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 119 transitions, 338 flow [2022-07-19 20:59:42,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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 20:59:42,700 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:42,700 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:42,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 20:59:42,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:42,701 INFO L85 PathProgramCache]: Analyzing trace with hash -22498912, now seen corresponding path program 1 times [2022-07-19 20:59:42,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:42,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121048048] [2022-07-19 20:59:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:42,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:42,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:42,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121048048] [2022-07-19 20:59:42,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121048048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:42,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:42,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:59:42,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368639720] [2022-07-19 20:59:42,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:42,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:59:42,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:42,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:59:42,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:59:42,743 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 134 [2022-07-19 20:59:42,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 119 transitions, 338 flow. Second operand has 5 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 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 20:59:42,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:42,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 134 [2022-07-19 20:59:42,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:43,008 INFO L129 PetriNetUnfolder]: 207/2412 cut-off events. [2022-07-19 20:59:43,008 INFO L130 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-07-19 20:59:43,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 2412 events. 207/2412 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 17319 event pairs, 30 based on Foata normal form. 0/2349 useless extension candidates. Maximal degree in co-relation 4332. Up to 1054 conditions per place. [2022-07-19 20:59:43,021 INFO L132 encePairwiseOnDemand]: 124/134 looper letters, 49 selfloop transitions, 9 changer transitions 0/136 dead transitions. [2022-07-19 20:59:43,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 136 transitions, 506 flow [2022-07-19 20:59:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:59:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 20:59:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 587 transitions. [2022-07-19 20:59:43,023 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7300995024875622 [2022-07-19 20:59:43,023 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 587 transitions. [2022-07-19 20:59:43,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 587 transitions. [2022-07-19 20:59:43,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:43,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 587 transitions. [2022-07-19 20:59:43,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.83333333333333) internal successors, (587), 6 states have internal predecessors, (587), 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 20:59:43,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 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 20:59:43,026 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 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 20:59:43,026 INFO L186 Difference]: Start difference. First operand has 128 places, 119 transitions, 338 flow. Second operand 6 states and 587 transitions. [2022-07-19 20:59:43,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 136 transitions, 506 flow [2022-07-19 20:59:43,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 136 transitions, 500 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 20:59:43,029 INFO L242 Difference]: Finished difference. Result has 133 places, 121 transitions, 368 flow [2022-07-19 20:59:43,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=368, PETRI_PLACES=133, PETRI_TRANSITIONS=121} [2022-07-19 20:59:43,029 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, 8 predicate places. [2022-07-19 20:59:43,029 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 121 transitions, 368 flow [2022-07-19 20:59:43,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 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 20:59:43,030 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:43,030 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:43,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-19 20:59:43,030 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:43,030 INFO L85 PathProgramCache]: Analyzing trace with hash 702817143, now seen corresponding path program 1 times [2022-07-19 20:59:43,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:43,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222722042] [2022-07-19 20:59:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:43,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:43,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222722042] [2022-07-19 20:59:43,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222722042] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:59:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535322883] [2022-07-19 20:59:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:43,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:59:43,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:59:43,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:59:43,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 20:59:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:43,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 20:59:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:59:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:43,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:59:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:43,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535322883] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:59:43,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:59:43,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-19 20:59:43,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746326289] [2022-07-19 20:59:43,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:59:43,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 20:59:43,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:43,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 20:59:43,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-19 20:59:43,282 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 134 [2022-07-19 20:59:43,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 121 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 93.6923076923077) internal successors, (1218), 13 states have internal predecessors, (1218), 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 20:59:43,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:43,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 134 [2022-07-19 20:59:43,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:43,574 INFO L129 PetriNetUnfolder]: 204/2387 cut-off events. [2022-07-19 20:59:43,575 INFO L130 PetriNetUnfolder]: For 536/536 co-relation queries the response was YES. [2022-07-19 20:59:43,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4697 conditions, 2387 events. 204/2387 cut-off events. For 536/536 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 17644 event pairs, 31 based on Foata normal form. 2/2389 useless extension candidates. Maximal degree in co-relation 4684. Up to 766 conditions per place. [2022-07-19 20:59:43,587 INFO L132 encePairwiseOnDemand]: 122/134 looper letters, 42 selfloop transitions, 17 changer transitions 0/140 dead transitions. [2022-07-19 20:59:43,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 140 transitions, 544 flow [2022-07-19 20:59:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:59:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 20:59:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 960 transitions. [2022-07-19 20:59:43,613 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7164179104477612 [2022-07-19 20:59:43,614 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 960 transitions. [2022-07-19 20:59:43,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 960 transitions. [2022-07-19 20:59:43,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:43,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 960 transitions. [2022-07-19 20:59:43,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 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 20:59:43,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 134.0) internal successors, (1474), 11 states have internal predecessors, (1474), 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 20:59:43,617 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 134.0) internal successors, (1474), 11 states have internal predecessors, (1474), 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 20:59:43,617 INFO L186 Difference]: Start difference. First operand has 133 places, 121 transitions, 368 flow. Second operand 10 states and 960 transitions. [2022-07-19 20:59:43,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 140 transitions, 544 flow [2022-07-19 20:59:43,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 140 transitions, 534 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 20:59:43,621 INFO L242 Difference]: Finished difference. Result has 142 places, 128 transitions, 441 flow [2022-07-19 20:59:43,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=441, PETRI_PLACES=142, PETRI_TRANSITIONS=128} [2022-07-19 20:59:43,621 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, 17 predicate places. [2022-07-19 20:59:43,622 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 128 transitions, 441 flow [2022-07-19 20:59:43,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 93.6923076923077) internal successors, (1218), 13 states have internal predecessors, (1218), 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 20:59:43,622 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:43,622 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:59:43,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 20:59:43,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-19 20:59:43,823 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash 318277048, now seen corresponding path program 1 times [2022-07-19 20:59:43,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:43,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870630021] [2022-07-19 20:59:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:43,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-19 20:59:43,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:43,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870630021] [2022-07-19 20:59:43,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870630021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:59:43,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610476715] [2022-07-19 20:59:43,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:43,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:59:43,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:59:43,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:59:43,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 20:59:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:43,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 20:59:43,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:59:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:44,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:59:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:44,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610476715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:59:44,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:59:44,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-07-19 20:59:44,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633151841] [2022-07-19 20:59:44,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:59:44,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 20:59:44,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:44,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 20:59:44,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-07-19 20:59:44,255 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 134 [2022-07-19 20:59:44,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 128 transitions, 441 flow. Second operand has 21 states, 21 states have (on average 92.95238095238095) internal successors, (1952), 21 states have internal predecessors, (1952), 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 20:59:44,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:44,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 134 [2022-07-19 20:59:44,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:44,457 INFO L129 PetriNetUnfolder]: 0/162 cut-off events. [2022-07-19 20:59:44,457 INFO L130 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-07-19 20:59:44,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 162 events. 0/162 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 48 event pairs, 0 based on Foata normal form. 4/166 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-19 20:59:44,458 INFO L132 encePairwiseOnDemand]: 128/134 looper letters, 24 selfloop transitions, 20 changer transitions 0/111 dead transitions. [2022-07-19 20:59:44,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 111 transitions, 463 flow [2022-07-19 20:59:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 20:59:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-19 20:59:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2006 transitions. [2022-07-19 20:59:44,460 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.680461329715061 [2022-07-19 20:59:44,460 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2006 transitions. [2022-07-19 20:59:44,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2006 transitions. [2022-07-19 20:59:44,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:44,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2006 transitions. [2022-07-19 20:59:44,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 91.18181818181819) internal successors, (2006), 22 states have internal predecessors, (2006), 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 20:59:44,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 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 20:59:44,466 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 134.0) internal successors, (3082), 23 states have internal predecessors, (3082), 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 20:59:44,466 INFO L186 Difference]: Start difference. First operand has 142 places, 128 transitions, 441 flow. Second operand 22 states and 2006 transitions. [2022-07-19 20:59:44,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 111 transitions, 463 flow [2022-07-19 20:59:44,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 111 transitions, 403 flow, removed 20 selfloop flow, removed 7 redundant places. [2022-07-19 20:59:44,468 INFO L242 Difference]: Finished difference. Result has 129 places, 100 transitions, 320 flow [2022-07-19 20:59:44,468 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=320, PETRI_PLACES=129, PETRI_TRANSITIONS=100} [2022-07-19 20:59:44,469 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, 4 predicate places. [2022-07-19 20:59:44,469 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 100 transitions, 320 flow [2022-07-19 20:59:44,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 92.95238095238095) internal successors, (1952), 21 states have internal predecessors, (1952), 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 20:59:44,469 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:44,470 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:59:44,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 20:59:44,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-19 20:59:44,686 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:44,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:44,687 INFO L85 PathProgramCache]: Analyzing trace with hash 66243864, now seen corresponding path program 1 times [2022-07-19 20:59:44,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:44,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585287431] [2022-07-19 20:59:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:44,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:44,716 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 20:59:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:44,746 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 20:59:44,746 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 20:59:44,746 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 20:59:44,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 20:59:44,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-19 20:59:44,747 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 20:59:44,748 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 20:59:44,749 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-19 20:59:44,766 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-19 20:59:44,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 140 transitions, 378 flow [2022-07-19 20:59:45,160 INFO L129 PetriNetUnfolder]: 850/5388 cut-off events. [2022-07-19 20:59:45,160 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-19 20:59:45,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5886 conditions, 5388 events. 850/5388 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 44396 event pairs, 201 based on Foata normal form. 0/4602 useless extension candidates. Maximal degree in co-relation 2960. Up to 448 conditions per place. [2022-07-19 20:59:45,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 140 transitions, 378 flow [2022-07-19 20:59:45,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 130 transitions, 358 flow [2022-07-19 20:59:45,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:59:45,177 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@10267f85, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71b028f4 [2022-07-19 20:59:45,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:59:45,180 INFO L129 PetriNetUnfolder]: 6/81 cut-off events. [2022-07-19 20:59:45,180 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 20:59:45,180 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:45,180 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:45,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:45,180 INFO L85 PathProgramCache]: Analyzing trace with hash -379929367, now seen corresponding path program 1 times [2022-07-19 20:59:45,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:45,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059283564] [2022-07-19 20:59:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:45,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:45,194 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 20:59:45,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:45,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059283564] [2022-07-19 20:59:45,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059283564] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:45,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:45,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 20:59:45,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992786993] [2022-07-19 20:59:45,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:45,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 20:59:45,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:45,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 20:59:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 20:59:45,196 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 140 [2022-07-19 20:59:45,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 130 transitions, 358 flow. Second operand has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 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 20:59:45,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:45,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 140 [2022-07-19 20:59:45,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:45,535 INFO L129 PetriNetUnfolder]: 456/3842 cut-off events. [2022-07-19 20:59:45,536 INFO L130 PetriNetUnfolder]: For 1449/1449 co-relation queries the response was YES. [2022-07-19 20:59:45,542 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4796 conditions, 3842 events. 456/3842 cut-off events. For 1449/1449 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 30190 event pairs, 201 based on Foata normal form. 266/3842 useless extension candidates. Maximal degree in co-relation 2381. Up to 456 conditions per place. [2022-07-19 20:59:45,547 INFO L132 encePairwiseOnDemand]: 135/140 looper letters, 14 selfloop transitions, 0 changer transitions 2/125 dead transitions. [2022-07-19 20:59:45,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 125 transitions, 376 flow [2022-07-19 20:59:45,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 20:59:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 20:59:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 257 transitions. [2022-07-19 20:59:45,548 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9178571428571428 [2022-07-19 20:59:45,548 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 257 transitions. [2022-07-19 20:59:45,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 257 transitions. [2022-07-19 20:59:45,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:45,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 257 transitions. [2022-07-19 20:59:45,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 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 20:59:45,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 20:59:45,550 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 20:59:45,550 INFO L186 Difference]: Start difference. First operand has 132 places, 130 transitions, 358 flow. Second operand 2 states and 257 transitions. [2022-07-19 20:59:45,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 125 transitions, 376 flow [2022-07-19 20:59:45,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 125 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:45,552 INFO L242 Difference]: Finished difference. Result has 133 places, 123 transitions, 344 flow [2022-07-19 20:59:45,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=344, PETRI_PLACES=133, PETRI_TRANSITIONS=123} [2022-07-19 20:59:45,552 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, 1 predicate places. [2022-07-19 20:59:45,553 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 123 transitions, 344 flow [2022-07-19 20:59:45,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 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 20:59:45,553 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:45,553 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:45,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-19 20:59:45,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:45,554 INFO L85 PathProgramCache]: Analyzing trace with hash 507574314, now seen corresponding path program 1 times [2022-07-19 20:59:45,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:45,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945951616] [2022-07-19 20:59:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:45,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:45,578 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 20:59:45,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:45,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945951616] [2022-07-19 20:59:45,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945951616] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:45,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:45,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:59:45,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775882106] [2022-07-19 20:59:45,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:45,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:59:45,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:45,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:59:45,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:59:45,580 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 140 [2022-07-19 20:59:45,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 123 transitions, 344 flow. Second operand has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 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 20:59:45,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:45,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 140 [2022-07-19 20:59:45,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:45,975 INFO L129 PetriNetUnfolder]: 469/3944 cut-off events. [2022-07-19 20:59:45,975 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-19 20:59:45,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6571 conditions, 3944 events. 469/3944 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 31861 event pairs, 102 based on Foata normal form. 0/3683 useless extension candidates. Maximal degree in co-relation 6561. Up to 2024 conditions per place. [2022-07-19 20:59:45,987 INFO L132 encePairwiseOnDemand]: 133/140 looper letters, 48 selfloop transitions, 5 changer transitions 0/138 dead transitions. [2022-07-19 20:59:45,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 138 transitions, 501 flow [2022-07-19 20:59:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 20:59:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 20:59:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 435 transitions. [2022-07-19 20:59:45,989 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7767857142857143 [2022-07-19 20:59:45,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 435 transitions. [2022-07-19 20:59:45,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 435 transitions. [2022-07-19 20:59:45,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:45,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 435 transitions. [2022-07-19 20:59:45,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 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 20:59:45,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 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 20:59:45,990 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 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 20:59:45,990 INFO L186 Difference]: Start difference. First operand has 133 places, 123 transitions, 344 flow. Second operand 4 states and 435 transitions. [2022-07-19 20:59:45,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 138 transitions, 501 flow [2022-07-19 20:59:45,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 138 transitions, 501 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:45,993 INFO L242 Difference]: Finished difference. Result has 135 places, 125 transitions, 370 flow [2022-07-19 20:59:45,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=370, PETRI_PLACES=135, PETRI_TRANSITIONS=125} [2022-07-19 20:59:45,994 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, 3 predicate places. [2022-07-19 20:59:45,994 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 125 transitions, 370 flow [2022-07-19 20:59:45,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 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 20:59:45,994 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:45,994 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:45,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-19 20:59:45,994 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:45,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:45,995 INFO L85 PathProgramCache]: Analyzing trace with hash -319319933, now seen corresponding path program 1 times [2022-07-19 20:59:45,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:45,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351575467] [2022-07-19 20:59:45,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:45,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:46,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:46,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351575467] [2022-07-19 20:59:46,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351575467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:46,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:46,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:59:46,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076023195] [2022-07-19 20:59:46,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:46,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:59:46,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:59:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:59:46,032 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 140 [2022-07-19 20:59:46,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 125 transitions, 370 flow. Second operand has 5 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 20:59:46,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:46,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 140 [2022-07-19 20:59:46,033 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:46,495 INFO L129 PetriNetUnfolder]: 469/4706 cut-off events. [2022-07-19 20:59:46,495 INFO L130 PetriNetUnfolder]: For 684/684 co-relation queries the response was YES. [2022-07-19 20:59:46,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8552 conditions, 4706 events. 469/4706 cut-off events. For 684/684 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 41077 event pairs, 102 based on Foata normal form. 0/4579 useless extension candidates. Maximal degree in co-relation 8540. Up to 2152 conditions per place. [2022-07-19 20:59:46,512 INFO L132 encePairwiseOnDemand]: 130/140 looper letters, 52 selfloop transitions, 9 changer transitions 0/143 dead transitions. [2022-07-19 20:59:46,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 143 transitions, 549 flow [2022-07-19 20:59:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:59:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 20:59:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 614 transitions. [2022-07-19 20:59:46,514 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7309523809523809 [2022-07-19 20:59:46,514 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 614 transitions. [2022-07-19 20:59:46,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 614 transitions. [2022-07-19 20:59:46,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:46,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 614 transitions. [2022-07-19 20:59:46,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.33333333333333) internal successors, (614), 6 states have internal predecessors, (614), 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 20:59:46,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 140.0) internal successors, (980), 7 states have internal predecessors, (980), 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 20:59:46,516 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 140.0) internal successors, (980), 7 states have internal predecessors, (980), 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 20:59:46,516 INFO L186 Difference]: Start difference. First operand has 135 places, 125 transitions, 370 flow. Second operand 6 states and 614 transitions. [2022-07-19 20:59:46,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 143 transitions, 549 flow [2022-07-19 20:59:46,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 143 transitions, 543 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 20:59:46,519 INFO L242 Difference]: Finished difference. Result has 140 places, 127 transitions, 400 flow [2022-07-19 20:59:46,519 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=400, PETRI_PLACES=140, PETRI_TRANSITIONS=127} [2022-07-19 20:59:46,519 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, 8 predicate places. [2022-07-19 20:59:46,519 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 127 transitions, 400 flow [2022-07-19 20:59:46,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 20:59:46,520 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:46,520 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:46,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-19 20:59:46,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1184050624, now seen corresponding path program 1 times [2022-07-19 20:59:46,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:46,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460419525] [2022-07-19 20:59:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:46,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:46,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:46,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460419525] [2022-07-19 20:59:46,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460419525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:59:46,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177292817] [2022-07-19 20:59:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:46,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:59:46,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:59:46,556 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:59:46,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 20:59:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:46,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 20:59:46,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:59:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:46,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:59:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:46,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177292817] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:59:46,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:59:46,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-19 20:59:46,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683721007] [2022-07-19 20:59:46,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:59:46,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 20:59:46,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:46,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 20:59:46,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-19 20:59:46,818 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 140 [2022-07-19 20:59:46,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 127 transitions, 400 flow. Second operand has 13 states, 13 states have (on average 97.6923076923077) internal successors, (1270), 13 states have internal predecessors, (1270), 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 20:59:46,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:46,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 140 [2022-07-19 20:59:46,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:47,434 INFO L129 PetriNetUnfolder]: 466/4681 cut-off events. [2022-07-19 20:59:47,434 INFO L130 PetriNetUnfolder]: For 1089/1089 co-relation queries the response was YES. [2022-07-19 20:59:47,452 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9299 conditions, 4681 events. 466/4681 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 41362 event pairs, 103 based on Foata normal form. 2/4683 useless extension candidates. Maximal degree in co-relation 9285. Up to 1600 conditions per place. [2022-07-19 20:59:47,462 INFO L132 encePairwiseOnDemand]: 128/140 looper letters, 45 selfloop transitions, 17 changer transitions 0/147 dead transitions. [2022-07-19 20:59:47,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 147 transitions, 587 flow [2022-07-19 20:59:47,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:59:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 20:59:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1003 transitions. [2022-07-19 20:59:47,463 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7164285714285714 [2022-07-19 20:59:47,463 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1003 transitions. [2022-07-19 20:59:47,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1003 transitions. [2022-07-19 20:59:47,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:47,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1003 transitions. [2022-07-19 20:59:47,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 100.3) internal successors, (1003), 10 states have internal predecessors, (1003), 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 20:59:47,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 140.0) internal successors, (1540), 11 states have internal predecessors, (1540), 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 20:59:47,467 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 140.0) internal successors, (1540), 11 states have internal predecessors, (1540), 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 20:59:47,467 INFO L186 Difference]: Start difference. First operand has 140 places, 127 transitions, 400 flow. Second operand 10 states and 1003 transitions. [2022-07-19 20:59:47,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 147 transitions, 587 flow [2022-07-19 20:59:47,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 147 transitions, 577 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 20:59:47,477 INFO L242 Difference]: Finished difference. Result has 149 places, 134 transitions, 473 flow [2022-07-19 20:59:47,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=473, PETRI_PLACES=149, PETRI_TRANSITIONS=134} [2022-07-19 20:59:47,477 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, 17 predicate places. [2022-07-19 20:59:47,478 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 134 transitions, 473 flow [2022-07-19 20:59:47,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 97.6923076923077) internal successors, (1270), 13 states have internal predecessors, (1270), 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 20:59:47,478 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:47,479 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:59:47,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 20:59:47,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:59:47,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:47,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:47,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1469236097, now seen corresponding path program 1 times [2022-07-19 20:59:47,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:47,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846277468] [2022-07-19 20:59:47,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:47,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-19 20:59:47,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:47,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846277468] [2022-07-19 20:59:47,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846277468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:59:47,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111023087] [2022-07-19 20:59:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:47,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:59:47,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:59:47,743 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:59:47,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 20:59:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:47,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 20:59:47,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:59:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:48,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:59:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:48,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111023087] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:59:48,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:59:48,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-07-19 20:59:48,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805925372] [2022-07-19 20:59:48,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:59:48,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 20:59:48,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:48,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 20:59:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-07-19 20:59:48,170 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 140 [2022-07-19 20:59:48,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 134 transitions, 473 flow. Second operand has 21 states, 21 states have (on average 96.95238095238095) internal successors, (2036), 21 states have internal predecessors, (2036), 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 20:59:48,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:48,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 140 [2022-07-19 20:59:48,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:48,921 INFO L129 PetriNetUnfolder]: 441/4410 cut-off events. [2022-07-19 20:59:48,921 INFO L130 PetriNetUnfolder]: For 2652/2652 co-relation queries the response was YES. [2022-07-19 20:59:48,935 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10110 conditions, 4410 events. 441/4410 cut-off events. For 2652/2652 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 42830 event pairs, 102 based on Foata normal form. 11/4421 useless extension candidates. Maximal degree in co-relation 10093. Up to 1465 conditions per place. [2022-07-19 20:59:48,945 INFO L132 encePairwiseOnDemand]: 125/140 looper letters, 63 selfloop transitions, 32 changer transitions 0/179 dead transitions. [2022-07-19 20:59:48,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 179 transitions, 865 flow [2022-07-19 20:59:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 20:59:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-19 20:59:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2331 transitions. [2022-07-19 20:59:48,950 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.69375 [2022-07-19 20:59:48,950 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2331 transitions. [2022-07-19 20:59:48,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2331 transitions. [2022-07-19 20:59:48,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:48,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2331 transitions. [2022-07-19 20:59:48,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 97.125) internal successors, (2331), 24 states have internal predecessors, (2331), 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 20:59:48,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 140.0) internal successors, (3500), 25 states have internal predecessors, (3500), 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 20:59:48,956 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 140.0) internal successors, (3500), 25 states have internal predecessors, (3500), 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 20:59:48,956 INFO L186 Difference]: Start difference. First operand has 149 places, 134 transitions, 473 flow. Second operand 24 states and 2331 transitions. [2022-07-19 20:59:48,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 179 transitions, 865 flow [2022-07-19 20:59:48,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 179 transitions, 844 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-07-19 20:59:48,970 INFO L242 Difference]: Finished difference. Result has 178 places, 151 transitions, 661 flow [2022-07-19 20:59:48,970 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=661, PETRI_PLACES=178, PETRI_TRANSITIONS=151} [2022-07-19 20:59:48,970 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, 46 predicate places. [2022-07-19 20:59:48,970 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 151 transitions, 661 flow [2022-07-19 20:59:48,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 96.95238095238095) internal successors, (2036), 21 states have internal predecessors, (2036), 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 20:59:48,971 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:48,971 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:59:48,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 20:59:49,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-19 20:59:49,200 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:49,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:49,200 INFO L85 PathProgramCache]: Analyzing trace with hash -770212857, now seen corresponding path program 1 times [2022-07-19 20:59:49,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:49,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514417879] [2022-07-19 20:59:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:49,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:49,243 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 20:59:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:49,292 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 20:59:49,293 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 20:59:49,293 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 20:59:49,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 20:59:49,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-19 20:59:49,293 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 20:59:49,294 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 20:59:49,294 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-19 20:59:49,306 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-19 20:59:49,308 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 412 flow [2022-07-19 20:59:50,164 INFO L129 PetriNetUnfolder]: 1812/10722 cut-off events. [2022-07-19 20:59:50,165 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-07-19 20:59:50,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11807 conditions, 10722 events. 1812/10722 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 104685 event pairs, 522 based on Foata normal form. 0/9166 useless extension candidates. Maximal degree in co-relation 5870. Up to 1024 conditions per place. [2022-07-19 20:59:50,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 412 flow [2022-07-19 20:59:50,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 136 transitions, 392 flow [2022-07-19 20:59:50,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:59:50,201 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@10267f85, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71b028f4 [2022-07-19 20:59:50,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:59:50,204 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-07-19 20:59:50,211 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 20:59:50,211 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:50,211 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:50,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:50,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash -420247715, now seen corresponding path program 1 times [2022-07-19 20:59:50,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:50,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139098092] [2022-07-19 20:59:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:50,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:50,224 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 20:59:50,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:50,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139098092] [2022-07-19 20:59:50,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139098092] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:50,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:50,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 20:59:50,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510264292] [2022-07-19 20:59:50,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:50,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 20:59:50,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:50,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 20:59:50,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 20:59:50,226 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 146 [2022-07-19 20:59:50,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 136 transitions, 392 flow. Second operand has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 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 20:59:50,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:50,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 146 [2022-07-19 20:59:50,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:50,912 INFO L129 PetriNetUnfolder]: 1033/7639 cut-off events. [2022-07-19 20:59:50,912 INFO L130 PetriNetUnfolder]: For 3220/3220 co-relation queries the response was YES. [2022-07-19 20:59:50,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9757 conditions, 7639 events. 1033/7639 cut-off events. For 3220/3220 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 72481 event pairs, 522 based on Foata normal form. 523/7639 useless extension candidates. Maximal degree in co-relation 4779. Up to 1033 conditions per place. [2022-07-19 20:59:50,945 INFO L132 encePairwiseOnDemand]: 141/146 looper letters, 16 selfloop transitions, 0 changer transitions 2/131 dead transitions. [2022-07-19 20:59:50,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 131 transitions, 414 flow [2022-07-19 20:59:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 20:59:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 20:59:50,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 267 transitions. [2022-07-19 20:59:50,946 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9143835616438356 [2022-07-19 20:59:50,947 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 267 transitions. [2022-07-19 20:59:50,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 267 transitions. [2022-07-19 20:59:50,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:50,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 267 transitions. [2022-07-19 20:59:50,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 133.5) internal successors, (267), 2 states have internal predecessors, (267), 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 20:59:50,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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 20:59:50,948 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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 20:59:50,948 INFO L186 Difference]: Start difference. First operand has 139 places, 136 transitions, 392 flow. Second operand 2 states and 267 transitions. [2022-07-19 20:59:50,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 131 transitions, 414 flow [2022-07-19 20:59:50,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 131 transitions, 414 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:50,950 INFO L242 Difference]: Finished difference. Result has 140 places, 129 transitions, 378 flow [2022-07-19 20:59:50,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=378, PETRI_PLACES=140, PETRI_TRANSITIONS=129} [2022-07-19 20:59:50,951 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 1 predicate places. [2022-07-19 20:59:50,951 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 129 transitions, 378 flow [2022-07-19 20:59:50,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 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 20:59:50,951 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:50,951 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:50,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-19 20:59:50,952 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash -616761220, now seen corresponding path program 1 times [2022-07-19 20:59:50,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:50,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276347473] [2022-07-19 20:59:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:50,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:50,971 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 20:59:50,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:50,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276347473] [2022-07-19 20:59:50,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276347473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:50,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:50,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:59:50,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426406192] [2022-07-19 20:59:50,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:50,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:59:50,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:59:50,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:59:50,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 146 [2022-07-19 20:59:50,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 129 transitions, 378 flow. Second operand has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 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 20:59:50,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:50,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 146 [2022-07-19 20:59:50,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:51,829 INFO L129 PetriNetUnfolder]: 1052/7779 cut-off events. [2022-07-19 20:59:51,829 INFO L130 PetriNetUnfolder]: For 1164/1164 co-relation queries the response was YES. [2022-07-19 20:59:51,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13142 conditions, 7779 events. 1052/7779 cut-off events. For 1164/1164 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 74250 event pairs, 303 based on Foata normal form. 0/7261 useless extension candidates. Maximal degree in co-relation 13131. Up to 4147 conditions per place. [2022-07-19 20:59:51,868 INFO L132 encePairwiseOnDemand]: 139/146 looper letters, 51 selfloop transitions, 5 changer transitions 0/145 dead transitions. [2022-07-19 20:59:51,868 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 145 transitions, 546 flow [2022-07-19 20:59:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 20:59:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 20:59:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 454 transitions. [2022-07-19 20:59:51,869 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7773972602739726 [2022-07-19 20:59:51,869 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 454 transitions. [2022-07-19 20:59:51,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 454 transitions. [2022-07-19 20:59:51,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:51,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 454 transitions. [2022-07-19 20:59:51,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 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 20:59:51,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 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 20:59:51,871 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 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 20:59:51,871 INFO L186 Difference]: Start difference. First operand has 140 places, 129 transitions, 378 flow. Second operand 4 states and 454 transitions. [2022-07-19 20:59:51,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 145 transitions, 546 flow [2022-07-19 20:59:51,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 145 transitions, 546 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:59:51,874 INFO L242 Difference]: Finished difference. Result has 142 places, 131 transitions, 404 flow [2022-07-19 20:59:51,874 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=404, PETRI_PLACES=142, PETRI_TRANSITIONS=131} [2022-07-19 20:59:51,875 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 3 predicate places. [2022-07-19 20:59:51,875 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 131 transitions, 404 flow [2022-07-19 20:59:51,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 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 20:59:51,875 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:51,875 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:51,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-19 20:59:51,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:51,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:51,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1535337772, now seen corresponding path program 1 times [2022-07-19 20:59:51,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:51,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57396938] [2022-07-19 20:59:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:51,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:51,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:51,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57396938] [2022-07-19 20:59:51,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57396938] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:51,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:51,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:59:51,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117401218] [2022-07-19 20:59:51,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:51,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:59:51,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:59:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:59:51,909 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 146 [2022-07-19 20:59:51,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 131 transitions, 404 flow. Second operand has 5 states, 5 states have (on average 100.8) internal successors, (504), 5 states have internal predecessors, (504), 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 20:59:51,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:51,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 146 [2022-07-19 20:59:51,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:52,873 INFO L129 PetriNetUnfolder]: 1052/9309 cut-off events. [2022-07-19 20:59:52,873 INFO L130 PetriNetUnfolder]: For 1431/1431 co-relation queries the response was YES. [2022-07-19 20:59:52,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17061 conditions, 9309 events. 1052/9309 cut-off events. For 1431/1431 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 95459 event pairs, 303 based on Foata normal form. 0/9054 useless extension candidates. Maximal degree in co-relation 17048. Up to 4403 conditions per place. [2022-07-19 20:59:52,923 INFO L132 encePairwiseOnDemand]: 136/146 looper letters, 55 selfloop transitions, 9 changer transitions 0/150 dead transitions. [2022-07-19 20:59:52,923 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 150 transitions, 594 flow [2022-07-19 20:59:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:59:52,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 20:59:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 641 transitions. [2022-07-19 20:59:52,925 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7317351598173516 [2022-07-19 20:59:52,925 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 641 transitions. [2022-07-19 20:59:52,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 641 transitions. [2022-07-19 20:59:52,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:52,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 641 transitions. [2022-07-19 20:59:52,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.83333333333333) internal successors, (641), 6 states have internal predecessors, (641), 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 20:59:52,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 146.0) internal successors, (1022), 7 states have internal predecessors, (1022), 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 20:59:52,927 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 146.0) internal successors, (1022), 7 states have internal predecessors, (1022), 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 20:59:52,927 INFO L186 Difference]: Start difference. First operand has 142 places, 131 transitions, 404 flow. Second operand 6 states and 641 transitions. [2022-07-19 20:59:52,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 150 transitions, 594 flow [2022-07-19 20:59:52,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 150 transitions, 588 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 20:59:52,931 INFO L242 Difference]: Finished difference. Result has 147 places, 133 transitions, 434 flow [2022-07-19 20:59:52,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=147, PETRI_TRANSITIONS=133} [2022-07-19 20:59:52,931 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 8 predicate places. [2022-07-19 20:59:52,931 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 133 transitions, 434 flow [2022-07-19 20:59:52,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.8) internal successors, (504), 5 states have internal predecessors, (504), 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 20:59:52,932 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:52,932 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:52,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-19 20:59:52,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:52,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1355363639, now seen corresponding path program 1 times [2022-07-19 20:59:52,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:52,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639148430] [2022-07-19 20:59:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:52,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:52,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:52,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639148430] [2022-07-19 20:59:52,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639148430] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:59:52,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109054814] [2022-07-19 20:59:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:52,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:59:52,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:59:52,968 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:59:52,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 20:59:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:53,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 20:59:53,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:59:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:53,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:59:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:53,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109054814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:59:53,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:59:53,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-19 20:59:53,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726903468] [2022-07-19 20:59:53,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:59:53,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 20:59:53,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:53,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 20:59:53,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-19 20:59:53,210 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 146 [2022-07-19 20:59:53,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 133 transitions, 434 flow. Second operand has 13 states, 13 states have (on average 101.6923076923077) internal successors, (1322), 13 states have internal predecessors, (1322), 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 20:59:53,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:53,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 146 [2022-07-19 20:59:53,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:54,307 INFO L129 PetriNetUnfolder]: 1049/9284 cut-off events. [2022-07-19 20:59:54,308 INFO L130 PetriNetUnfolder]: For 2228/2228 co-relation queries the response was YES. [2022-07-19 20:59:54,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18586 conditions, 9284 events. 1049/9284 cut-off events. For 2228/2228 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 95742 event pairs, 304 based on Foata normal form. 2/9286 useless extension candidates. Maximal degree in co-relation 18571. Up to 3330 conditions per place. [2022-07-19 20:59:54,340 INFO L132 encePairwiseOnDemand]: 134/146 looper letters, 48 selfloop transitions, 17 changer transitions 0/154 dead transitions. [2022-07-19 20:59:54,340 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 154 transitions, 632 flow [2022-07-19 20:59:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:59:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 20:59:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1046 transitions. [2022-07-19 20:59:54,341 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7164383561643836 [2022-07-19 20:59:54,341 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1046 transitions. [2022-07-19 20:59:54,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1046 transitions. [2022-07-19 20:59:54,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:54,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1046 transitions. [2022-07-19 20:59:54,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 104.6) internal successors, (1046), 10 states have internal predecessors, (1046), 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 20:59:54,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 146.0) internal successors, (1606), 11 states have internal predecessors, (1606), 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 20:59:54,344 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 146.0) internal successors, (1606), 11 states have internal predecessors, (1606), 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 20:59:54,344 INFO L186 Difference]: Start difference. First operand has 147 places, 133 transitions, 434 flow. Second operand 10 states and 1046 transitions. [2022-07-19 20:59:54,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 154 transitions, 632 flow [2022-07-19 20:59:54,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 154 transitions, 622 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 20:59:54,358 INFO L242 Difference]: Finished difference. Result has 156 places, 140 transitions, 507 flow [2022-07-19 20:59:54,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=507, PETRI_PLACES=156, PETRI_TRANSITIONS=140} [2022-07-19 20:59:54,359 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 17 predicate places. [2022-07-19 20:59:54,359 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 140 transitions, 507 flow [2022-07-19 20:59:54,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 101.6923076923077) internal successors, (1322), 13 states have internal predecessors, (1322), 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 20:59:54,359 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:54,360 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:59:54,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 20:59:54,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-19 20:59:54,578 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:54,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1772614602, now seen corresponding path program 1 times [2022-07-19 20:59:54,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:54,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695720138] [2022-07-19 20:59:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:54,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-19 20:59:54,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:54,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695720138] [2022-07-19 20:59:54,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695720138] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:59:54,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360063434] [2022-07-19 20:59:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:54,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:59:54,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:59:54,626 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:59:54,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 20:59:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:54,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 20:59:54,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:59:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:54,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:59:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:59:55,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360063434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:59:55,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:59:55,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-07-19 20:59:55,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186977660] [2022-07-19 20:59:55,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:59:55,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 20:59:55,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:55,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 20:59:55,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-07-19 20:59:55,048 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 146 [2022-07-19 20:59:55,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 140 transitions, 507 flow. Second operand has 21 states, 21 states have (on average 100.95238095238095) internal successors, (2120), 21 states have internal predecessors, (2120), 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 20:59:55,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:55,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 146 [2022-07-19 20:59:55,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:59:56,414 INFO L129 PetriNetUnfolder]: 1058/9144 cut-off events. [2022-07-19 20:59:56,414 INFO L130 PetriNetUnfolder]: For 5596/5596 co-relation queries the response was YES. [2022-07-19 20:59:56,441 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21141 conditions, 9144 events. 1058/9144 cut-off events. For 5596/5596 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 103983 event pairs, 204 based on Foata normal form. 19/9163 useless extension candidates. Maximal degree in co-relation 21123. Up to 3166 conditions per place. [2022-07-19 20:59:56,458 INFO L132 encePairwiseOnDemand]: 131/146 looper letters, 67 selfloop transitions, 32 changer transitions 0/187 dead transitions. [2022-07-19 20:59:56,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 187 transitions, 917 flow [2022-07-19 20:59:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 20:59:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-19 20:59:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2431 transitions. [2022-07-19 20:59:56,461 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6937785388127854 [2022-07-19 20:59:56,461 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2431 transitions. [2022-07-19 20:59:56,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2431 transitions. [2022-07-19 20:59:56,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:59:56,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2431 transitions. [2022-07-19 20:59:56,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 101.29166666666667) internal successors, (2431), 24 states have internal predecessors, (2431), 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 20:59:56,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 146.0) internal successors, (3650), 25 states have internal predecessors, (3650), 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 20:59:56,467 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 146.0) internal successors, (3650), 25 states have internal predecessors, (3650), 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 20:59:56,467 INFO L186 Difference]: Start difference. First operand has 156 places, 140 transitions, 507 flow. Second operand 24 states and 2431 transitions. [2022-07-19 20:59:56,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 187 transitions, 917 flow [2022-07-19 20:59:56,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 187 transitions, 896 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-07-19 20:59:56,490 INFO L242 Difference]: Finished difference. Result has 185 places, 157 transitions, 695 flow [2022-07-19 20:59:56,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=695, PETRI_PLACES=185, PETRI_TRANSITIONS=157} [2022-07-19 20:59:56,491 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 46 predicate places. [2022-07-19 20:59:56,491 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 157 transitions, 695 flow [2022-07-19 20:59:56,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 100.95238095238095) internal successors, (2120), 21 states have internal predecessors, (2120), 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 20:59:56,492 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:56,492 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:59:56,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 20:59:56,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-19 20:59:56,707 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:56,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:56,708 INFO L85 PathProgramCache]: Analyzing trace with hash 734599071, now seen corresponding path program 1 times [2022-07-19 20:59:56,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:56,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605245346] [2022-07-19 20:59:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:56,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:56,740 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 20:59:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 20:59:56,772 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 20:59:56,772 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 20:59:56,772 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 20:59:56,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 20:59:56,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-19 20:59:56,772 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 20:59:56,774 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 20:59:56,774 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-19 20:59:56,787 INFO L135 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-07-19 20:59:56,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 152 transitions, 448 flow [2022-07-19 20:59:58,985 INFO L129 PetriNetUnfolder]: 3862/21496 cut-off events. [2022-07-19 20:59:58,985 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-07-19 20:59:59,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23873 conditions, 21496 events. 3862/21496 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 240520 event pairs, 1291 based on Foata normal form. 0/18402 useless extension candidates. Maximal degree in co-relation 11789. Up to 2304 conditions per place. [2022-07-19 20:59:59,025 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 152 transitions, 448 flow [2022-07-19 20:59:59,054 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 142 transitions, 428 flow [2022-07-19 20:59:59,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:59:59,054 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@10267f85, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71b028f4 [2022-07-19 20:59:59,054 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:59:59,057 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-19 20:59:59,057 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 20:59:59,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:59:59,057 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:59:59,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 20:59:59,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:59:59,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1615772973, now seen corresponding path program 1 times [2022-07-19 20:59:59,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:59:59,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443201378] [2022-07-19 20:59:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:59:59,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:59:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:59:59,070 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 20:59:59,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:59:59,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443201378] [2022-07-19 20:59:59,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443201378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:59:59,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:59:59,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 20:59:59,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739538549] [2022-07-19 20:59:59,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:59:59,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 20:59:59,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:59:59,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 20:59:59,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 20:59:59,072 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 152 [2022-07-19 20:59:59,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 142 transitions, 428 flow. Second operand has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 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 20:59:59,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:59:59,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 152 [2022-07-19 20:59:59,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:00,621 INFO L129 PetriNetUnfolder]: 2314/15340 cut-off events. [2022-07-19 21:00:00,621 INFO L130 PetriNetUnfolder]: For 7113/7113 co-relation queries the response was YES. [2022-07-19 21:00:00,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20031 conditions, 15340 events. 2314/15340 cut-off events. For 7113/7113 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 166824 event pairs, 1291 based on Foata normal form. 1036/15340 useless extension candidates. Maximal degree in co-relation 9738. Up to 2314 conditions per place. [2022-07-19 21:00:00,688 INFO L132 encePairwiseOnDemand]: 147/152 looper letters, 18 selfloop transitions, 0 changer transitions 2/137 dead transitions. [2022-07-19 21:00:00,688 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 137 transitions, 454 flow [2022-07-19 21:00:00,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:00:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:00:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 277 transitions. [2022-07-19 21:00:00,689 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9111842105263158 [2022-07-19 21:00:00,689 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 277 transitions. [2022-07-19 21:00:00,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 277 transitions. [2022-07-19 21:00:00,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:00,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 277 transitions. [2022-07-19 21:00:00,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 138.5) internal successors, (277), 2 states have internal predecessors, (277), 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 21:00:00,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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 21:00:00,691 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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 21:00:00,691 INFO L186 Difference]: Start difference. First operand has 146 places, 142 transitions, 428 flow. Second operand 2 states and 277 transitions. [2022-07-19 21:00:00,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 137 transitions, 454 flow [2022-07-19 21:00:00,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 137 transitions, 454 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:00:00,694 INFO L242 Difference]: Finished difference. Result has 147 places, 135 transitions, 414 flow [2022-07-19 21:00:00,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=414, PETRI_PLACES=147, PETRI_TRANSITIONS=135} [2022-07-19 21:00:00,695 INFO L279 CegarLoopForPetriNet]: 146 programPoint places, 1 predicate places. [2022-07-19 21:00:00,695 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 135 transitions, 414 flow [2022-07-19 21:00:00,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 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 21:00:00,695 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:00,696 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:00,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-19 21:00:00,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:00:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:00,696 INFO L85 PathProgramCache]: Analyzing trace with hash -728269292, now seen corresponding path program 1 times [2022-07-19 21:00:00,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:00,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692309213] [2022-07-19 21:00:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:00,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:00,717 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 21:00:00,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:00,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692309213] [2022-07-19 21:00:00,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692309213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:00:00,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:00:00,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:00:00,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632829709] [2022-07-19 21:00:00,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:00:00,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:00:00,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:00,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:00:00,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:00:00,719 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 152 [2022-07-19 21:00:00,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 135 transitions, 414 flow. Second operand has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 21:00:00,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:00,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 152 [2022-07-19 21:00:00,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:02,589 INFO L129 PetriNetUnfolder]: 2340/15523 cut-off events. [2022-07-19 21:00:02,589 INFO L130 PetriNetUnfolder]: For 2496/2496 co-relation queries the response was YES. [2022-07-19 21:00:02,628 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26571 conditions, 15523 events. 2340/15523 cut-off events. For 2496/2496 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 170290 event pairs, 825 based on Foata normal form. 0/14492 useless extension candidates. Maximal degree in co-relation 26559. Up to 8511 conditions per place. [2022-07-19 21:00:02,657 INFO L132 encePairwiseOnDemand]: 145/152 looper letters, 54 selfloop transitions, 5 changer transitions 0/152 dead transitions. [2022-07-19 21:00:02,657 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 152 transitions, 593 flow [2022-07-19 21:00:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:00:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:00:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 473 transitions. [2022-07-19 21:00:02,658 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7779605263157895 [2022-07-19 21:00:02,658 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 473 transitions. [2022-07-19 21:00:02,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 473 transitions. [2022-07-19 21:00:02,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:02,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 473 transitions. [2022-07-19 21:00:02,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.25) internal successors, (473), 4 states have internal predecessors, (473), 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 21:00:02,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 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 21:00:02,660 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 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 21:00:02,660 INFO L186 Difference]: Start difference. First operand has 147 places, 135 transitions, 414 flow. Second operand 4 states and 473 transitions. [2022-07-19 21:00:02,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 152 transitions, 593 flow [2022-07-19 21:00:02,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 152 transitions, 593 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:00:02,664 INFO L242 Difference]: Finished difference. Result has 149 places, 137 transitions, 440 flow [2022-07-19 21:00:02,664 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=440, PETRI_PLACES=149, PETRI_TRANSITIONS=137} [2022-07-19 21:00:02,664 INFO L279 CegarLoopForPetriNet]: 146 programPoint places, 3 predicate places. [2022-07-19 21:00:02,664 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 137 transitions, 440 flow [2022-07-19 21:00:02,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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 21:00:02,665 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:02,665 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:02,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-19 21:00:02,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:00:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1969732575, now seen corresponding path program 1 times [2022-07-19 21:00:02,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:02,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395946402] [2022-07-19 21:00:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:02,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:00:02,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:02,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395946402] [2022-07-19 21:00:02,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395946402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:00:02,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:00:02,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:00:02,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665989658] [2022-07-19 21:00:02,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:00:02,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:00:02,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:02,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:00:02,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:00:02,701 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 152 [2022-07-19 21:00:02,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 137 transitions, 440 flow. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 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 21:00:02,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:02,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 152 [2022-07-19 21:00:02,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:05,125 INFO L129 PetriNetUnfolder]: 2340/18589 cut-off events. [2022-07-19 21:00:05,125 INFO L130 PetriNetUnfolder]: For 3020/3020 co-relation queries the response was YES. [2022-07-19 21:00:05,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34350 conditions, 18589 events. 2340/18589 cut-off events. For 3020/3020 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 218862 event pairs, 825 based on Foata normal form. 0/18078 useless extension candidates. Maximal degree in co-relation 34336. Up to 9023 conditions per place. [2022-07-19 21:00:05,219 INFO L132 encePairwiseOnDemand]: 142/152 looper letters, 58 selfloop transitions, 9 changer transitions 0/157 dead transitions. [2022-07-19 21:00:05,219 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 157 transitions, 641 flow [2022-07-19 21:00:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:00:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:00:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 668 transitions. [2022-07-19 21:00:05,221 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7324561403508771 [2022-07-19 21:00:05,221 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 668 transitions. [2022-07-19 21:00:05,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 668 transitions. [2022-07-19 21:00:05,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:05,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 668 transitions. [2022-07-19 21:00:05,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.33333333333333) internal successors, (668), 6 states have internal predecessors, (668), 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 21:00:05,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 152.0) internal successors, (1064), 7 states have internal predecessors, (1064), 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 21:00:05,223 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 152.0) internal successors, (1064), 7 states have internal predecessors, (1064), 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 21:00:05,223 INFO L186 Difference]: Start difference. First operand has 149 places, 137 transitions, 440 flow. Second operand 6 states and 668 transitions. [2022-07-19 21:00:05,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 157 transitions, 641 flow [2022-07-19 21:00:05,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 157 transitions, 635 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:00:05,226 INFO L242 Difference]: Finished difference. Result has 154 places, 139 transitions, 470 flow [2022-07-19 21:00:05,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=470, PETRI_PLACES=154, PETRI_TRANSITIONS=139} [2022-07-19 21:00:05,227 INFO L279 CegarLoopForPetriNet]: 146 programPoint places, 8 predicate places. [2022-07-19 21:00:05,227 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 139 transitions, 470 flow [2022-07-19 21:00:05,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 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 21:00:05,227 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:05,227 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:05,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-19 21:00:05,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:00:05,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:05,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1139235218, now seen corresponding path program 1 times [2022-07-19 21:00:05,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:05,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847929422] [2022-07-19 21:00:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:05,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:00:05,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:05,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847929422] [2022-07-19 21:00:05,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847929422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:00:05,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578935084] [2022-07-19 21:00:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:05,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:00:05,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:00:05,266 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:00:05,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:00:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:05,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 21:00:05,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:00:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:00:05,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:00:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:00:05,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578935084] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:00:05,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:00:05,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-19 21:00:05,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49918604] [2022-07-19 21:00:05,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:00:05,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:00:05,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:05,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:00:05,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:00:05,525 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 152 [2022-07-19 21:00:05,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 139 transitions, 470 flow. Second operand has 13 states, 13 states have (on average 105.6923076923077) internal successors, (1374), 13 states have internal predecessors, (1374), 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 21:00:05,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:05,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 152 [2022-07-19 21:00:05,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:08,236 INFO L129 PetriNetUnfolder]: 2337/18564 cut-off events. [2022-07-19 21:00:08,237 INFO L130 PetriNetUnfolder]: For 4594/4594 co-relation queries the response was YES. [2022-07-19 21:00:08,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37422 conditions, 18564 events. 2337/18564 cut-off events. For 4594/4594 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 219058 event pairs, 826 based on Foata normal form. 2/18566 useless extension candidates. Maximal degree in co-relation 37406. Up to 6916 conditions per place. [2022-07-19 21:00:08,311 INFO L132 encePairwiseOnDemand]: 140/152 looper letters, 51 selfloop transitions, 17 changer transitions 0/161 dead transitions. [2022-07-19 21:00:08,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 161 transitions, 679 flow [2022-07-19 21:00:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:00:08,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:00:08,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1089 transitions. [2022-07-19 21:00:08,312 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7164473684210526 [2022-07-19 21:00:08,312 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1089 transitions. [2022-07-19 21:00:08,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1089 transitions. [2022-07-19 21:00:08,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:08,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1089 transitions. [2022-07-19 21:00:08,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 108.9) internal successors, (1089), 10 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:00:08,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 152.0) internal successors, (1672), 11 states have internal predecessors, (1672), 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 21:00:08,315 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 152.0) internal successors, (1672), 11 states have internal predecessors, (1672), 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 21:00:08,315 INFO L186 Difference]: Start difference. First operand has 154 places, 139 transitions, 470 flow. Second operand 10 states and 1089 transitions. [2022-07-19 21:00:08,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 161 transitions, 679 flow [2022-07-19 21:00:08,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 161 transitions, 669 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:00:08,360 INFO L242 Difference]: Finished difference. Result has 163 places, 146 transitions, 543 flow [2022-07-19 21:00:08,360 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=543, PETRI_PLACES=163, PETRI_TRANSITIONS=146} [2022-07-19 21:00:08,360 INFO L279 CegarLoopForPetriNet]: 146 programPoint places, 17 predicate places. [2022-07-19 21:00:08,360 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 146 transitions, 543 flow [2022-07-19 21:00:08,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 105.6923076923077) internal successors, (1374), 13 states have internal predecessors, (1374), 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 21:00:08,361 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:08,361 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:08,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:00:08,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-19 21:00:08,562 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:00:08,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:08,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1823789293, now seen corresponding path program 1 times [2022-07-19 21:00:08,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:08,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311927394] [2022-07-19 21:00:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:08,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-19 21:00:08,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:08,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311927394] [2022-07-19 21:00:08,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311927394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:00:08,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220238377] [2022-07-19 21:00:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:08,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:00:08,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:00:08,609 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:00:08,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:00:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:08,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:00:08,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:00:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:00:08,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:00:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:00:09,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220238377] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:00:09,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:00:09,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-07-19 21:00:09,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217465872] [2022-07-19 21:00:09,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:00:09,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 21:00:09,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 21:00:09,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-07-19 21:00:09,075 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 152 [2022-07-19 21:00:09,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 146 transitions, 543 flow. Second operand has 21 states, 21 states have (on average 104.95238095238095) internal successors, (2204), 21 states have internal predecessors, (2204), 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 21:00:09,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:09,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 152 [2022-07-19 21:00:09,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:12,015 INFO L129 PetriNetUnfolder]: 2393/18601 cut-off events. [2022-07-19 21:00:12,016 INFO L130 PetriNetUnfolder]: For 11472/11472 co-relation queries the response was YES. [2022-07-19 21:00:12,071 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43243 conditions, 18601 events. 2393/18601 cut-off events. For 11472/11472 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 232878 event pairs, 507 based on Foata normal form. 28/18629 useless extension candidates. Maximal degree in co-relation 43224. Up to 6720 conditions per place. [2022-07-19 21:00:12,112 INFO L132 encePairwiseOnDemand]: 137/152 looper letters, 71 selfloop transitions, 32 changer transitions 0/195 dead transitions. [2022-07-19 21:00:12,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 195 transitions, 971 flow [2022-07-19 21:00:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 21:00:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-19 21:00:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2531 transitions. [2022-07-19 21:00:12,115 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6938048245614035 [2022-07-19 21:00:12,115 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2531 transitions. [2022-07-19 21:00:12,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2531 transitions. [2022-07-19 21:00:12,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:12,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2531 transitions. [2022-07-19 21:00:12,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 105.45833333333333) internal successors, (2531), 24 states have internal predecessors, (2531), 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 21:00:12,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 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 21:00:12,121 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 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 21:00:12,121 INFO L186 Difference]: Start difference. First operand has 163 places, 146 transitions, 543 flow. Second operand 24 states and 2531 transitions. [2022-07-19 21:00:12,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 195 transitions, 971 flow [2022-07-19 21:00:12,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 195 transitions, 950 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-07-19 21:00:12,179 INFO L242 Difference]: Finished difference. Result has 192 places, 163 transitions, 731 flow [2022-07-19 21:00:12,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=731, PETRI_PLACES=192, PETRI_TRANSITIONS=163} [2022-07-19 21:00:12,180 INFO L279 CegarLoopForPetriNet]: 146 programPoint places, 46 predicate places. [2022-07-19 21:00:12,180 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 163 transitions, 731 flow [2022-07-19 21:00:12,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 104.95238095238095) internal successors, (2204), 21 states have internal predecessors, (2204), 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 21:00:12,180 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:12,180 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:12,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 21:00:12,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-19 21:00:12,391 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:00:12,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:12,392 INFO L85 PathProgramCache]: Analyzing trace with hash -302615088, now seen corresponding path program 1 times [2022-07-19 21:00:12,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:12,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616962272] [2022-07-19 21:00:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:12,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:00:12,435 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:00:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:00:12,473 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:00:12,474 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:00:12,474 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:00:12,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:00:12,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-19 21:00:12,474 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:00:12,475 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:00:12,475 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-19 21:00:12,488 INFO L135 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-07-19 21:00:12,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 162 places, 158 transitions, 486 flow [2022-07-19 21:00:17,266 INFO L129 PetriNetUnfolder]: 8216/43278 cut-off events. [2022-07-19 21:00:17,266 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-07-19 21:00:17,367 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48484 conditions, 43278 events. 8216/43278 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 547213 event pairs, 3084 based on Foata normal form. 0/37110 useless extension candidates. Maximal degree in co-relation 23853. Up to 5120 conditions per place. [2022-07-19 21:00:17,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 158 transitions, 486 flow [2022-07-19 21:00:17,432 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 148 transitions, 466 flow [2022-07-19 21:00:17,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:00:17,433 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@10267f85, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71b028f4 [2022-07-19 21:00:17,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:00:17,436 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-19 21:00:17,436 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:00:17,436 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:17,436 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:17,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:00:17,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash -714453583, now seen corresponding path program 1 times [2022-07-19 21:00:17,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:17,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13627313] [2022-07-19 21:00:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:17,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:17,451 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 21:00:17,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:17,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13627313] [2022-07-19 21:00:17,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13627313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:00:17,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:00:17,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:00:17,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078249924] [2022-07-19 21:00:17,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:00:17,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:00:17,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:17,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:00:17,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:00:17,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 158 [2022-07-19 21:00:17,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 148 transitions, 466 flow. Second operand has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 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 21:00:17,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:17,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 158 [2022-07-19 21:00:17,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:21,082 INFO L129 PetriNetUnfolder]: 5131/30977 cut-off events. [2022-07-19 21:00:21,082 INFO L130 PetriNetUnfolder]: For 15625/15625 co-relation queries the response was YES. [2022-07-19 21:00:21,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41314 conditions, 30977 events. 5131/30977 cut-off events. For 15625/15625 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 382077 event pairs, 3084 based on Foata normal form. 2061/30977 useless extension candidates. Maximal degree in co-relation 20010. Up to 5131 conditions per place. [2022-07-19 21:00:21,207 INFO L132 encePairwiseOnDemand]: 153/158 looper letters, 20 selfloop transitions, 0 changer transitions 2/143 dead transitions. [2022-07-19 21:00:21,207 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 143 transitions, 496 flow [2022-07-19 21:00:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:00:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:00:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 287 transitions. [2022-07-19 21:00:21,208 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9082278481012658 [2022-07-19 21:00:21,208 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 287 transitions. [2022-07-19 21:00:21,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 287 transitions. [2022-07-19 21:00:21,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:21,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 287 transitions. [2022-07-19 21:00:21,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 143.5) internal successors, (287), 2 states have internal predecessors, (287), 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 21:00:21,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 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 21:00:21,209 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 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 21:00:21,209 INFO L186 Difference]: Start difference. First operand has 153 places, 148 transitions, 466 flow. Second operand 2 states and 287 transitions. [2022-07-19 21:00:21,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 143 transitions, 496 flow [2022-07-19 21:00:21,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 143 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:00:21,212 INFO L242 Difference]: Finished difference. Result has 154 places, 141 transitions, 452 flow [2022-07-19 21:00:21,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=452, PETRI_PLACES=154, PETRI_TRANSITIONS=141} [2022-07-19 21:00:21,212 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 1 predicate places. [2022-07-19 21:00:21,212 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 141 transitions, 452 flow [2022-07-19 21:00:21,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 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 21:00:21,212 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:21,213 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:21,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-19 21:00:21,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:00:21,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:21,213 INFO L85 PathProgramCache]: Analyzing trace with hash 173050098, now seen corresponding path program 1 times [2022-07-19 21:00:21,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:21,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757610653] [2022-07-19 21:00:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:21,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:21,231 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 21:00:21,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:21,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757610653] [2022-07-19 21:00:21,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757610653] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:00:21,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:00:21,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:00:21,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459912922] [2022-07-19 21:00:21,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:00:21,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:00:21,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:21,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:00:21,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:00:21,232 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 158 [2022-07-19 21:00:21,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 141 transitions, 452 flow. Second operand has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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 21:00:21,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:21,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 158 [2022-07-19 21:00:21,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:25,246 INFO L129 PetriNetUnfolder]: 5165/31208 cut-off events. [2022-07-19 21:00:25,246 INFO L130 PetriNetUnfolder]: For 5375/5375 co-relation queries the response was YES. [2022-07-19 21:00:25,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54090 conditions, 31208 events. 5165/31208 cut-off events. For 5375/5375 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 387211 event pairs, 2116 based on Foata normal form. 0/29152 useless extension candidates. Maximal degree in co-relation 54077. Up to 17484 conditions per place. [2022-07-19 21:00:25,416 INFO L132 encePairwiseOnDemand]: 151/158 looper letters, 57 selfloop transitions, 5 changer transitions 0/159 dead transitions. [2022-07-19 21:00:25,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 159 transitions, 642 flow [2022-07-19 21:00:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:00:25,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:00:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 492 transitions. [2022-07-19 21:00:25,417 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7784810126582279 [2022-07-19 21:00:25,417 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 492 transitions. [2022-07-19 21:00:25,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 492 transitions. [2022-07-19 21:00:25,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:25,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 492 transitions. [2022-07-19 21:00:25,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 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 21:00:25,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 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 21:00:25,418 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 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 21:00:25,419 INFO L186 Difference]: Start difference. First operand has 154 places, 141 transitions, 452 flow. Second operand 4 states and 492 transitions. [2022-07-19 21:00:25,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 159 transitions, 642 flow [2022-07-19 21:00:25,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 159 transitions, 642 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:00:25,424 INFO L242 Difference]: Finished difference. Result has 156 places, 143 transitions, 478 flow [2022-07-19 21:00:25,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=478, PETRI_PLACES=156, PETRI_TRANSITIONS=143} [2022-07-19 21:00:25,425 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 3 predicate places. [2022-07-19 21:00:25,425 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 143 transitions, 478 flow [2022-07-19 21:00:25,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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 21:00:25,425 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:25,425 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:25,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-19 21:00:25,425 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:00:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1976180716, now seen corresponding path program 1 times [2022-07-19 21:00:25,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:25,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612773515] [2022-07-19 21:00:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:25,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:00:25,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:25,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612773515] [2022-07-19 21:00:25,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612773515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:00:25,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:00:25,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:00:25,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269197315] [2022-07-19 21:00:25,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:00:25,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:00:25,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:25,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:00:25,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:00:25,457 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 158 [2022-07-19 21:00:25,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 143 transitions, 478 flow. Second operand has 5 states, 5 states have (on average 108.8) internal successors, (544), 5 states have internal predecessors, (544), 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 21:00:25,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:25,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 158 [2022-07-19 21:00:25,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:30,569 INFO L129 PetriNetUnfolder]: 5165/37346 cut-off events. [2022-07-19 21:00:30,570 INFO L130 PetriNetUnfolder]: For 6412/6412 co-relation queries the response was YES. [2022-07-19 21:00:30,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69571 conditions, 37346 events. 5165/37346 cut-off events. For 6412/6412 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 495975 event pairs, 2116 based on Foata normal form. 0/36323 useless extension candidates. Maximal degree in co-relation 69556. Up to 18508 conditions per place. [2022-07-19 21:00:30,770 INFO L132 encePairwiseOnDemand]: 148/158 looper letters, 61 selfloop transitions, 9 changer transitions 0/164 dead transitions. [2022-07-19 21:00:30,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 164 transitions, 690 flow [2022-07-19 21:00:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:00:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:00:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 695 transitions. [2022-07-19 21:00:30,771 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7331223628691983 [2022-07-19 21:00:30,771 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 695 transitions. [2022-07-19 21:00:30,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 695 transitions. [2022-07-19 21:00:30,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:30,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 695 transitions. [2022-07-19 21:00:30,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 115.83333333333333) internal successors, (695), 6 states have internal predecessors, (695), 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 21:00:30,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 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 21:00:30,773 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 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 21:00:30,773 INFO L186 Difference]: Start difference. First operand has 156 places, 143 transitions, 478 flow. Second operand 6 states and 695 transitions. [2022-07-19 21:00:30,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 164 transitions, 690 flow [2022-07-19 21:00:30,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 164 transitions, 684 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:00:30,777 INFO L242 Difference]: Finished difference. Result has 161 places, 145 transitions, 508 flow [2022-07-19 21:00:30,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=508, PETRI_PLACES=161, PETRI_TRANSITIONS=145} [2022-07-19 21:00:30,777 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 8 predicate places. [2022-07-19 21:00:30,777 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 145 transitions, 508 flow [2022-07-19 21:00:30,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.8) internal successors, (544), 5 states have internal predecessors, (544), 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 21:00:30,778 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:30,778 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:00:30,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-19 21:00:30,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:00:30,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:30,778 INFO L85 PathProgramCache]: Analyzing trace with hash 672067995, now seen corresponding path program 1 times [2022-07-19 21:00:30,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:30,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434553654] [2022-07-19 21:00:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:30,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:00:30,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:30,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434553654] [2022-07-19 21:00:30,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434553654] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:00:30,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905716981] [2022-07-19 21:00:30,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:30,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:00:30,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:00:30,822 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:00:30,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:00:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:30,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 21:00:30,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:00:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:00:31,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:00:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:00:31,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905716981] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:00:31,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:00:31,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-19 21:00:31,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486004251] [2022-07-19 21:00:31,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:00:31,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:00:31,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:00:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:00:31,119 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 158 [2022-07-19 21:00:31,120 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 145 transitions, 508 flow. Second operand has 13 states, 13 states have (on average 109.6923076923077) internal successors, (1426), 13 states have internal predecessors, (1426), 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 21:00:31,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:31,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 158 [2022-07-19 21:00:31,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:00:36,362 INFO L129 PetriNetUnfolder]: 5162/37321 cut-off events. [2022-07-19 21:00:36,363 INFO L130 PetriNetUnfolder]: For 9532/9532 co-relation queries the response was YES. [2022-07-19 21:00:36,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75727 conditions, 37321 events. 5162/37321 cut-off events. For 9532/9532 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 496216 event pairs, 2117 based on Foata normal form. 2/37323 useless extension candidates. Maximal degree in co-relation 75710. Up to 14342 conditions per place. [2022-07-19 21:00:36,805 INFO L132 encePairwiseOnDemand]: 146/158 looper letters, 54 selfloop transitions, 17 changer transitions 0/168 dead transitions. [2022-07-19 21:00:36,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 168 transitions, 728 flow [2022-07-19 21:00:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:00:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:00:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1132 transitions. [2022-07-19 21:00:36,806 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7164556962025317 [2022-07-19 21:00:36,806 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1132 transitions. [2022-07-19 21:00:36,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1132 transitions. [2022-07-19 21:00:36,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:00:36,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1132 transitions. [2022-07-19 21:00:36,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 113.2) internal successors, (1132), 10 states have internal predecessors, (1132), 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 21:00:36,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 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 21:00:36,809 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 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 21:00:36,809 INFO L186 Difference]: Start difference. First operand has 161 places, 145 transitions, 508 flow. Second operand 10 states and 1132 transitions. [2022-07-19 21:00:36,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 168 transitions, 728 flow [2022-07-19 21:00:36,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 168 transitions, 718 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:00:36,982 INFO L242 Difference]: Finished difference. Result has 170 places, 152 transitions, 581 flow [2022-07-19 21:00:36,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=581, PETRI_PLACES=170, PETRI_TRANSITIONS=152} [2022-07-19 21:00:36,983 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 17 predicate places. [2022-07-19 21:00:36,983 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 152 transitions, 581 flow [2022-07-19 21:00:36,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 109.6923076923077) internal successors, (1426), 13 states have internal predecessors, (1426), 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 21:00:36,984 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:00:36,984 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:00:37,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:00:37,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-19 21:00:37,192 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:00:37,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:00:37,192 INFO L85 PathProgramCache]: Analyzing trace with hash -54614692, now seen corresponding path program 1 times [2022-07-19 21:00:37,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:00:37,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964123769] [2022-07-19 21:00:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:37,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:00:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-19 21:00:37,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:00:37,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964123769] [2022-07-19 21:00:37,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964123769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:00:37,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960300460] [2022-07-19 21:00:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:00:37,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:00:37,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:00:37,243 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:00:37,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:00:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:00:37,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:00:37,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:00:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:00:37,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:00:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:00:37,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960300460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:00:37,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:00:37,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-07-19 21:00:37,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833610055] [2022-07-19 21:00:37,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:00:37,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 21:00:37,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:00:37,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 21:00:37,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-07-19 21:00:37,701 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 158 [2022-07-19 21:00:37,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 152 transitions, 581 flow. Second operand has 21 states, 21 states have (on average 108.95238095238095) internal successors, (2288), 21 states have internal predecessors, (2288), 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 21:00:37,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:00:37,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 158 [2022-07-19 21:00:37,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand