./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 35987657 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-?-3598765 [2022-07-21 08:32:27,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:32:27,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:32:27,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:32:27,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:32:27,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:32:27,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:32:27,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:32:27,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:32:27,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:32:27,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:32:27,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:32:27,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:32:27,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:32:27,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:32:27,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:32:27,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:32:27,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:32:27,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:32:27,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:32:27,274 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:32:27,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:32:27,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:32:27,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:32:27,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:32:27,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:32:27,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:32:27,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:32:27,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:32:27,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:32:27,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:32:27,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:32:27,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:32:27,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:32:27,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:32:27,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:32:27,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:32:27,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:32:27,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:32:27,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:32:27,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:32:27,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:32:27,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:32:27,324 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:32:27,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:32:27,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:32:27,325 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:32:27,325 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:32:27,326 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:32:27,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:32:27,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:32:27,327 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:32:27,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:32:27,328 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:32:27,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:32:27,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:32:27,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:32:27,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:32:27,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:32:27,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:32:27,329 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:32:27,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:32:27,330 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:32:27,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:32:27,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:32:27,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:32:27,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:32:27,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:32:27,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:32:27,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:32:27,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:32:27,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:32:27,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:32:27,332 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:32:27,332 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:32:27,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:32:27,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 236a73c15e935747b9f2e95e881c26c921eba2f2ad7a2b23cf05552665b9f683 [2022-07-21 08:32:27,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:32:27,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:32:27,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:32:27,685 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:32:27,686 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:32:27,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/sigma.i [2022-07-21 08:32:27,727 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b8627d25/f55b3070e9ec4706ab2458fc4cb1310d/FLAG153ce2e11 [2022-07-21 08:32:28,234 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:32:28,235 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/sigma.i [2022-07-21 08:32:28,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b8627d25/f55b3070e9ec4706ab2458fc4cb1310d/FLAG153ce2e11 [2022-07-21 08:32:28,560 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b8627d25/f55b3070e9ec4706ab2458fc4cb1310d [2022-07-21 08:32:28,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:32:28,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:32:28,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:32:28,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:32:28,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:32:28,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:32:28" (1/1) ... [2022-07-21 08:32:28,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@199dfcc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:32:28, skipping insertion in model container [2022-07-21 08:32:28,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:32:28" (1/1) ... [2022-07-21 08:32:28,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:32:28,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:32:29,112 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] [2022-07-21 08:32:29,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:32:29,137 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:32:29,172 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] [2022-07-21 08:32:29,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:32:29,254 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:32:29,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:32:29 WrapperNode [2022-07-21 08:32:29,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:32:29,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:32:29,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:32:29,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:32:29,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:32:29" (1/1) ... [2022-07-21 08:32:29,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:32:29" (1/1) ... [2022-07-21 08:32:29,296 INFO L137 Inliner]: procedures = 323, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 88 [2022-07-21 08:32:29,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:32:29,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:32:29,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:32:29,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:32:29,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:32:29" (1/1) ... [2022-07-21 08:32:29,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:32:29" (1/1) ... [2022-07-21 08:32:29,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:32:29" (1/1) ... [2022-07-21 08:32:29,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:32:29" (1/1) ... [2022-07-21 08:32:29,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:32:29" (1/1) ... [2022-07-21 08:32:29,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:32:29" (1/1) ... [2022-07-21 08:32:29,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:32:29" (1/1) ... [2022-07-21 08:32:29,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:32:29,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:32:29,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:32:29,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:32:29,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:32:29" (1/1) ... [2022-07-21 08:32:29,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:32:29,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:32:29,362 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) [2022-07-21 08:32:29,371 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 [2022-07-21 08:32:29,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:32:29,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 08:32:29,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:32:29,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:32:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:32:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 08:32:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:32:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 08:32:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:32:29,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-07-21 08:32:29,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-07-21 08:32:29,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:32:29,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:32:29,402 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:32:29,494 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:32:29,495 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:32:29,739 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:32:29,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:32:29,749 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 08:32:29,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:32:29 BoogieIcfgContainer [2022-07-21 08:32:29,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:32:29,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:32:29,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:32:29,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:32:29,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:32:28" (1/3) ... [2022-07-21 08:32:29,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673781f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:32:29, skipping insertion in model container [2022-07-21 08:32:29,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:32:29" (2/3) ... [2022-07-21 08:32:29,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673781f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:32:29, skipping insertion in model container [2022-07-21 08:32:29,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:32:29" (3/3) ... [2022-07-21 08:32:29,759 INFO L111 eAbstractionObserver]: Analyzing ICFG sigma.i [2022-07-21 08:32:29,764 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:32:29,782 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:32:29,782 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:32:29,782 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:32:29,840 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-21 08:32:29,881 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 104 transitions, 216 flow [2022-07-21 08:32:29,946 INFO L129 PetriNetUnfolder]: 13/147 cut-off events. [2022-07-21 08:32:29,947 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:32:29,950 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. [2022-07-21 08:32:29,950 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 104 transitions, 216 flow [2022-07-21 08:32:29,957 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 94 transitions, 196 flow [2022-07-21 08:32:29,971 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:32:29,979 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@4f9d16d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b475044 [2022-07-21 08:32:29,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:32:30,006 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-07-21 08:32:30,007 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:32:30,011 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:30,012 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] [2022-07-21 08:32:30,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:30,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1933087549, now seen corresponding path program 1 times [2022-07-21 08:32:30,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:30,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735073502] [2022-07-21 08:32:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:30,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:30,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:30,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735073502] [2022-07-21 08:32:30,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735073502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:30,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:30,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:32:30,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685297974] [2022-07-21 08:32:30,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:30,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:32:30,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:30,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:32:30,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:32:30,317 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 104 [2022-07-21 08:32:30,320 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) [2022-07-21 08:32:30,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:30,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 104 [2022-07-21 08:32:30,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:30,368 INFO L129 PetriNetUnfolder]: 3/119 cut-off events. [2022-07-21 08:32:30,369 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:32:30,369 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. [2022-07-21 08:32:30,371 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 2 selfloop transitions, 0 changer transitions 2/89 dead transitions. [2022-07-21 08:32:30,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 89 transitions, 190 flow [2022-07-21 08:32:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:32:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:32:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 197 transitions. [2022-07-21 08:32:30,384 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9471153846153846 [2022-07-21 08:32:30,385 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 197 transitions. [2022-07-21 08:32:30,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 197 transitions. [2022-07-21 08:32:30,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:30,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 197 transitions. [2022-07-21 08:32:30,395 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) [2022-07-21 08:32:30,401 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) [2022-07-21 08:32:30,401 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) [2022-07-21 08:32:30,403 INFO L186 Difference]: Start difference. First operand has 90 places, 94 transitions, 196 flow. Second operand 2 states and 197 transitions. [2022-07-21 08:32:30,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 89 transitions, 190 flow [2022-07-21 08:32:30,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 89 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:30,413 INFO L242 Difference]: Finished difference. Result has 91 places, 87 transitions, 182 flow [2022-07-21 08:32:30,415 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} [2022-07-21 08:32:30,420 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2022-07-21 08:32:30,420 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 182 flow [2022-07-21 08:32:30,421 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) [2022-07-21 08:32:30,421 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:30,422 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] [2022-07-21 08:32:30,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:32:30,423 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:30,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:30,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1541806852, now seen corresponding path program 1 times [2022-07-21 08:32:30,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:30,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909378410] [2022-07-21 08:32:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:30,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:30,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:30,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909378410] [2022-07-21 08:32:30,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909378410] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:30,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:30,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:32:30,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678251814] [2022-07-21 08:32:30,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:30,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:32:30,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:30,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:32:30,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:32:30,588 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 104 [2022-07-21 08:32:30,588 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) [2022-07-21 08:32:30,589 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:30,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 104 [2022-07-21 08:32:30,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:30,662 INFO L129 PetriNetUnfolder]: 1/98 cut-off events. [2022-07-21 08:32:30,662 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:32:30,664 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. [2022-07-21 08:32:30,664 INFO L132 encePairwiseOnDemand]: 97/104 looper letters, 23 selfloop transitions, 5 changer transitions 2/91 dead transitions. [2022-07-21 08:32:30,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 91 transitions, 250 flow [2022-07-21 08:32:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:32:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:32:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2022-07-21 08:32:30,671 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7596153846153846 [2022-07-21 08:32:30,671 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 316 transitions. [2022-07-21 08:32:30,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 316 transitions. [2022-07-21 08:32:30,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:30,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 316 transitions. [2022-07-21 08:32:30,673 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) [2022-07-21 08:32:30,676 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) [2022-07-21 08:32:30,676 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) [2022-07-21 08:32:30,677 INFO L186 Difference]: Start difference. First operand has 91 places, 87 transitions, 182 flow. Second operand 4 states and 316 transitions. [2022-07-21 08:32:30,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 91 transitions, 250 flow [2022-07-21 08:32:30,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 91 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:30,681 INFO L242 Difference]: Finished difference. Result has 93 places, 87 transitions, 200 flow [2022-07-21 08:32:30,681 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} [2022-07-21 08:32:30,682 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 3 predicate places. [2022-07-21 08:32:30,682 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 200 flow [2022-07-21 08:32:30,682 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) [2022-07-21 08:32:30,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:30,683 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] [2022-07-21 08:32:30,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:32:30,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:30,685 INFO L85 PathProgramCache]: Analyzing trace with hash 190155836, now seen corresponding path program 1 times [2022-07-21 08:32:30,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:30,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588832252] [2022-07-21 08:32:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:30,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:30,753 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:32:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:30,814 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:32:30,814 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:32:30,815 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:32:30,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:32:30,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:32:30,818 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:32:30,822 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:32:30,822 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:32:30,844 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 08:32:30,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 106 places, 110 transitions, 238 flow [2022-07-21 08:32:30,867 INFO L129 PetriNetUnfolder]: 24/246 cut-off events. [2022-07-21 08:32:30,868 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:32:30,868 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. [2022-07-21 08:32:30,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 110 transitions, 238 flow [2022-07-21 08:32:30,870 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 100 transitions, 218 flow [2022-07-21 08:32:30,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:32:30,872 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@4f9d16d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b475044 [2022-07-21 08:32:30,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:32:30,878 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-21 08:32:30,878 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:32:30,878 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:30,878 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] [2022-07-21 08:32:30,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash -282255285, now seen corresponding path program 1 times [2022-07-21 08:32:30,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:30,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349828797] [2022-07-21 08:32:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:30,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:30,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:30,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349828797] [2022-07-21 08:32:30,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349828797] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:30,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:30,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:32:30,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207501283] [2022-07-21 08:32:30,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:30,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:32:30,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:30,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:32:30,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:32:30,935 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 110 [2022-07-21 08:32:30,935 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) [2022-07-21 08:32:30,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:30,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 110 [2022-07-21 08:32:30,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:30,957 INFO L129 PetriNetUnfolder]: 7/193 cut-off events. [2022-07-21 08:32:30,957 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-21 08:32:30,958 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. [2022-07-21 08:32:30,958 INFO L132 encePairwiseOnDemand]: 105/110 looper letters, 4 selfloop transitions, 0 changer transitions 2/95 dead transitions. [2022-07-21 08:32:30,958 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 216 flow [2022-07-21 08:32:30,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:32:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:32:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 207 transitions. [2022-07-21 08:32:30,960 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9409090909090909 [2022-07-21 08:32:30,960 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 207 transitions. [2022-07-21 08:32:30,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 207 transitions. [2022-07-21 08:32:30,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:30,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 207 transitions. [2022-07-21 08:32:30,961 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) [2022-07-21 08:32:30,962 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) [2022-07-21 08:32:30,962 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) [2022-07-21 08:32:30,963 INFO L186 Difference]: Start difference. First operand has 97 places, 100 transitions, 218 flow. Second operand 2 states and 207 transitions. [2022-07-21 08:32:30,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 216 flow [2022-07-21 08:32:30,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 95 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:30,965 INFO L242 Difference]: Finished difference. Result has 98 places, 93 transitions, 204 flow [2022-07-21 08:32:30,966 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} [2022-07-21 08:32:30,966 INFO L279 CegarLoopForPetriNet]: 97 programPoint places, 1 predicate places. [2022-07-21 08:32:30,967 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 204 flow [2022-07-21 08:32:30,967 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) [2022-07-21 08:32:30,967 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:30,967 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] [2022-07-21 08:32:30,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:32:30,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:30,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:30,968 INFO L85 PathProgramCache]: Analyzing trace with hash -153172566, now seen corresponding path program 1 times [2022-07-21 08:32:30,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:30,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074704669] [2022-07-21 08:32:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:30,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:31,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:31,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074704669] [2022-07-21 08:32:31,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074704669] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:31,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:31,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:32:31,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414279586] [2022-07-21 08:32:31,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:31,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:32:31,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:31,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:32:31,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:32:31,030 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 110 [2022-07-21 08:32:31,030 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) [2022-07-21 08:32:31,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:31,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 110 [2022-07-21 08:32:31,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:31,090 INFO L129 PetriNetUnfolder]: 5/180 cut-off events. [2022-07-21 08:32:31,091 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:32:31,091 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. [2022-07-21 08:32:31,092 INFO L132 encePairwiseOnDemand]: 103/110 looper letters, 33 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2022-07-21 08:32:31,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 103 transitions, 306 flow [2022-07-21 08:32:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:32:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:32:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 340 transitions. [2022-07-21 08:32:31,094 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7727272727272727 [2022-07-21 08:32:31,094 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 340 transitions. [2022-07-21 08:32:31,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 340 transitions. [2022-07-21 08:32:31,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:31,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 340 transitions. [2022-07-21 08:32:31,095 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) [2022-07-21 08:32:31,097 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) [2022-07-21 08:32:31,097 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) [2022-07-21 08:32:31,097 INFO L186 Difference]: Start difference. First operand has 98 places, 93 transitions, 204 flow. Second operand 4 states and 340 transitions. [2022-07-21 08:32:31,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 103 transitions, 306 flow [2022-07-21 08:32:31,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 103 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:31,100 INFO L242 Difference]: Finished difference. Result has 100 places, 95 transitions, 230 flow [2022-07-21 08:32:31,101 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} [2022-07-21 08:32:31,101 INFO L279 CegarLoopForPetriNet]: 97 programPoint places, 3 predicate places. [2022-07-21 08:32:31,102 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 230 flow [2022-07-21 08:32:31,102 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) [2022-07-21 08:32:31,102 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:31,102 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] [2022-07-21 08:32:31,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:32:31,103 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:31,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:31,103 INFO L85 PathProgramCache]: Analyzing trace with hash -571975030, now seen corresponding path program 1 times [2022-07-21 08:32:31,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:31,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617230058] [2022-07-21 08:32:31,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:31,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:31,140 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:32:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:31,212 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:32:31,217 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:32:31,217 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:32:31,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:32:31,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:32:31,218 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:32:31,219 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:32:31,219 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:32:31,239 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 08:32:31,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 113 places, 116 transitions, 262 flow [2022-07-21 08:32:31,288 INFO L129 PetriNetUnfolder]: 46/424 cut-off events. [2022-07-21 08:32:31,289 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-21 08:32:31,290 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. [2022-07-21 08:32:31,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 116 transitions, 262 flow [2022-07-21 08:32:31,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 242 flow [2022-07-21 08:32:31,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:32:31,301 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@4f9d16d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b475044 [2022-07-21 08:32:31,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:32:31,306 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-21 08:32:31,307 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:32:31,307 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:31,307 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] [2022-07-21 08:32:31,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:31,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:31,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1231702782, now seen corresponding path program 1 times [2022-07-21 08:32:31,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:31,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836316587] [2022-07-21 08:32:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:31,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:31,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:31,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836316587] [2022-07-21 08:32:31,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836316587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:31,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:31,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:32:31,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530176105] [2022-07-21 08:32:31,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:31,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:32:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:31,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:32:31,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:32:31,360 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 116 [2022-07-21 08:32:31,361 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) [2022-07-21 08:32:31,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:31,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 116 [2022-07-21 08:32:31,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:31,407 INFO L129 PetriNetUnfolder]: 16/322 cut-off events. [2022-07-21 08:32:31,407 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-21 08:32:31,408 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. [2022-07-21 08:32:31,409 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 6 selfloop transitions, 0 changer transitions 2/101 dead transitions. [2022-07-21 08:32:31,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 101 transitions, 244 flow [2022-07-21 08:32:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:32:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:32:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 217 transitions. [2022-07-21 08:32:31,410 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9353448275862069 [2022-07-21 08:32:31,410 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 217 transitions. [2022-07-21 08:32:31,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 217 transitions. [2022-07-21 08:32:31,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:31,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 217 transitions. [2022-07-21 08:32:31,411 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) [2022-07-21 08:32:31,412 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) [2022-07-21 08:32:31,412 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) [2022-07-21 08:32:31,412 INFO L186 Difference]: Start difference. First operand has 104 places, 106 transitions, 242 flow. Second operand 2 states and 217 transitions. [2022-07-21 08:32:31,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 101 transitions, 244 flow [2022-07-21 08:32:31,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 101 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:31,415 INFO L242 Difference]: Finished difference. Result has 105 places, 99 transitions, 228 flow [2022-07-21 08:32:31,415 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} [2022-07-21 08:32:31,416 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2022-07-21 08:32:31,416 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 99 transitions, 228 flow [2022-07-21 08:32:31,416 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) [2022-07-21 08:32:31,416 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:31,416 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] [2022-07-21 08:32:31,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:32:31,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:31,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:31,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2046678114, now seen corresponding path program 1 times [2022-07-21 08:32:31,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:31,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491567172] [2022-07-21 08:32:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:31,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:31,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:31,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491567172] [2022-07-21 08:32:31,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491567172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:31,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:31,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:32:31,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558988691] [2022-07-21 08:32:31,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:31,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:32:31,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:31,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:32:31,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:32:31,461 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 116 [2022-07-21 08:32:31,462 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) [2022-07-21 08:32:31,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:31,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 116 [2022-07-21 08:32:31,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:31,576 INFO L129 PetriNetUnfolder]: 15/322 cut-off events. [2022-07-21 08:32:31,576 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-21 08:32:31,577 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. [2022-07-21 08:32:31,578 INFO L132 encePairwiseOnDemand]: 109/116 looper letters, 36 selfloop transitions, 5 changer transitions 0/110 dead transitions. [2022-07-21 08:32:31,578 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 341 flow [2022-07-21 08:32:31,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:32:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:32:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 359 transitions. [2022-07-21 08:32:31,579 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7737068965517241 [2022-07-21 08:32:31,579 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 359 transitions. [2022-07-21 08:32:31,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 359 transitions. [2022-07-21 08:32:31,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:31,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 359 transitions. [2022-07-21 08:32:31,582 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) [2022-07-21 08:32:31,583 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) [2022-07-21 08:32:31,583 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) [2022-07-21 08:32:31,583 INFO L186 Difference]: Start difference. First operand has 105 places, 99 transitions, 228 flow. Second operand 4 states and 359 transitions. [2022-07-21 08:32:31,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 341 flow [2022-07-21 08:32:31,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 110 transitions, 341 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:31,587 INFO L242 Difference]: Finished difference. Result has 107 places, 101 transitions, 254 flow [2022-07-21 08:32:31,587 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} [2022-07-21 08:32:31,588 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 3 predicate places. [2022-07-21 08:32:31,588 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 254 flow [2022-07-21 08:32:31,589 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) [2022-07-21 08:32:31,589 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:31,589 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] [2022-07-21 08:32:31,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:32:31,589 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:31,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1460763493, now seen corresponding path program 1 times [2022-07-21 08:32:31,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:31,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887267558] [2022-07-21 08:32:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:31,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:31,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887267558] [2022-07-21 08:32:31,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887267558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:31,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:31,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:32:31,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782431158] [2022-07-21 08:32:31,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:31,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:32:31,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:31,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:32:31,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:32:31,679 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 116 [2022-07-21 08:32:31,680 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) [2022-07-21 08:32:31,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:31,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 116 [2022-07-21 08:32:31,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:31,792 INFO L129 PetriNetUnfolder]: 15/364 cut-off events. [2022-07-21 08:32:31,793 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-21 08:32:31,794 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. [2022-07-21 08:32:31,795 INFO L132 encePairwiseOnDemand]: 106/116 looper letters, 40 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2022-07-21 08:32:31,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 389 flow [2022-07-21 08:32:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:32:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:32:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 506 transitions. [2022-07-21 08:32:31,797 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7270114942528736 [2022-07-21 08:32:31,797 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 506 transitions. [2022-07-21 08:32:31,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 506 transitions. [2022-07-21 08:32:31,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:31,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 506 transitions. [2022-07-21 08:32:31,799 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) [2022-07-21 08:32:31,800 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) [2022-07-21 08:32:31,801 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) [2022-07-21 08:32:31,801 INFO L186 Difference]: Start difference. First operand has 107 places, 101 transitions, 254 flow. Second operand 6 states and 506 transitions. [2022-07-21 08:32:31,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 389 flow [2022-07-21 08:32:31,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 383 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:32:31,804 INFO L242 Difference]: Finished difference. Result has 112 places, 103 transitions, 284 flow [2022-07-21 08:32:31,804 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} [2022-07-21 08:32:31,805 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 8 predicate places. [2022-07-21 08:32:31,805 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 103 transitions, 284 flow [2022-07-21 08:32:31,805 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) [2022-07-21 08:32:31,806 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:31,806 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] [2022-07-21 08:32:31,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:32:31,806 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:31,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1914262696, now seen corresponding path program 1 times [2022-07-21 08:32:31,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:31,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9279700] [2022-07-21 08:32:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:31,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:31,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:31,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9279700] [2022-07-21 08:32:31,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9279700] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:32:31,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123352923] [2022-07-21 08:32:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:31,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:32:31,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:32:31,879 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) [2022-07-21 08:32:31,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:32:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:31,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 08:32:31,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:32:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:32,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:32:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:32,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123352923] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:32:32,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:32:32,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-21 08:32:32,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872503777] [2022-07-21 08:32:32,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:32:32,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:32:32,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:32,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:32:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-21 08:32:32,309 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 116 [2022-07-21 08:32:32,310 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) [2022-07-21 08:32:32,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:32,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 116 [2022-07-21 08:32:32,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:32,498 INFO L129 PetriNetUnfolder]: 12/339 cut-off events. [2022-07-21 08:32:32,498 INFO L130 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2022-07-21 08:32:32,499 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. [2022-07-21 08:32:32,499 INFO L132 encePairwiseOnDemand]: 104/116 looper letters, 33 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2022-07-21 08:32:32,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 119 transitions, 427 flow [2022-07-21 08:32:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:32:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:32:32,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 831 transitions. [2022-07-21 08:32:32,502 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7163793103448276 [2022-07-21 08:32:32,502 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 831 transitions. [2022-07-21 08:32:32,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 831 transitions. [2022-07-21 08:32:32,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:32,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 831 transitions. [2022-07-21 08:32:32,504 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) [2022-07-21 08:32:32,506 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) [2022-07-21 08:32:32,507 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) [2022-07-21 08:32:32,507 INFO L186 Difference]: Start difference. First operand has 112 places, 103 transitions, 284 flow. Second operand 10 states and 831 transitions. [2022-07-21 08:32:32,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 119 transitions, 427 flow [2022-07-21 08:32:32,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 119 transitions, 417 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:32:32,510 INFO L242 Difference]: Finished difference. Result has 121 places, 110 transitions, 357 flow [2022-07-21 08:32:32,511 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} [2022-07-21 08:32:32,511 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 17 predicate places. [2022-07-21 08:32:32,511 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 110 transitions, 357 flow [2022-07-21 08:32:32,512 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) [2022-07-21 08:32:32,512 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:32,512 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] [2022-07-21 08:32:32,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:32:32,727 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 [2022-07-21 08:32:32,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:32,728 INFO L85 PathProgramCache]: Analyzing trace with hash 929108029, now seen corresponding path program 1 times [2022-07-21 08:32:32,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:32,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999320901] [2022-07-21 08:32:32,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:32,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:32,765 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:32:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:32,797 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:32:32,797 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:32:32,797 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:32:32,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:32:32,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:32:32,798 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:32:32,798 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:32:32,798 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:32:32,809 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 08:32:32,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 120 places, 122 transitions, 288 flow [2022-07-21 08:32:32,865 INFO L129 PetriNetUnfolder]: 92/762 cut-off events. [2022-07-21 08:32:32,865 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-21 08:32:32,867 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. [2022-07-21 08:32:32,867 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 122 transitions, 288 flow [2022-07-21 08:32:32,870 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 112 transitions, 268 flow [2022-07-21 08:32:32,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:32:32,871 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@4f9d16d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b475044 [2022-07-21 08:32:32,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:32:32,875 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-07-21 08:32:32,876 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:32:32,876 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:32,876 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] [2022-07-21 08:32:32,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:32,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:32,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1238528377, now seen corresponding path program 1 times [2022-07-21 08:32:32,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:32,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530023868] [2022-07-21 08:32:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:32,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:32,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:32,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530023868] [2022-07-21 08:32:32,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530023868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:32,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:32,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:32:32,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262369700] [2022-07-21 08:32:32,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:32,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:32:32,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:32,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:32:32,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:32:32,896 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 122 [2022-07-21 08:32:32,896 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) [2022-07-21 08:32:32,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:32,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 122 [2022-07-21 08:32:32,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:32,961 INFO L129 PetriNetUnfolder]: 37/563 cut-off events. [2022-07-21 08:32:32,961 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-07-21 08:32:32,962 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. [2022-07-21 08:32:32,963 INFO L132 encePairwiseOnDemand]: 117/122 looper letters, 8 selfloop transitions, 0 changer transitions 2/107 dead transitions. [2022-07-21 08:32:32,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 107 transitions, 274 flow [2022-07-21 08:32:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:32:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:32:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 227 transitions. [2022-07-21 08:32:32,965 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.930327868852459 [2022-07-21 08:32:32,965 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 227 transitions. [2022-07-21 08:32:32,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 227 transitions. [2022-07-21 08:32:32,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:32,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 227 transitions. [2022-07-21 08:32:32,966 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) [2022-07-21 08:32:32,967 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) [2022-07-21 08:32:32,967 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) [2022-07-21 08:32:32,967 INFO L186 Difference]: Start difference. First operand has 111 places, 112 transitions, 268 flow. Second operand 2 states and 227 transitions. [2022-07-21 08:32:32,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 107 transitions, 274 flow [2022-07-21 08:32:32,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 107 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:32,970 INFO L242 Difference]: Finished difference. Result has 112 places, 105 transitions, 254 flow [2022-07-21 08:32:32,970 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} [2022-07-21 08:32:32,970 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 1 predicate places. [2022-07-21 08:32:32,971 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 105 transitions, 254 flow [2022-07-21 08:32:32,971 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) [2022-07-21 08:32:32,971 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:32,971 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] [2022-07-21 08:32:32,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:32:32,971 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:32,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1367611096, now seen corresponding path program 1 times [2022-07-21 08:32:32,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:32,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022555300] [2022-07-21 08:32:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:32,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:33,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:33,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022555300] [2022-07-21 08:32:33,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022555300] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:33,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:33,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:32:33,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968933391] [2022-07-21 08:32:33,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:33,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:32:33,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:33,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:32:33,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:32:33,009 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 122 [2022-07-21 08:32:33,009 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) [2022-07-21 08:32:33,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:33,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 122 [2022-07-21 08:32:33,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:33,112 INFO L129 PetriNetUnfolder]: 38/581 cut-off events. [2022-07-21 08:32:33,112 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-21 08:32:33,113 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. [2022-07-21 08:32:33,115 INFO L132 encePairwiseOnDemand]: 115/122 looper letters, 39 selfloop transitions, 5 changer transitions 0/117 dead transitions. [2022-07-21 08:32:33,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 117 transitions, 378 flow [2022-07-21 08:32:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:32:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:32:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 378 transitions. [2022-07-21 08:32:33,116 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7745901639344263 [2022-07-21 08:32:33,116 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 378 transitions. [2022-07-21 08:32:33,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 378 transitions. [2022-07-21 08:32:33,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:33,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 378 transitions. [2022-07-21 08:32:33,118 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) [2022-07-21 08:32:33,118 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) [2022-07-21 08:32:33,119 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) [2022-07-21 08:32:33,119 INFO L186 Difference]: Start difference. First operand has 112 places, 105 transitions, 254 flow. Second operand 4 states and 378 transitions. [2022-07-21 08:32:33,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 117 transitions, 378 flow [2022-07-21 08:32:33,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 117 transitions, 378 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:33,122 INFO L242 Difference]: Finished difference. Result has 114 places, 107 transitions, 280 flow [2022-07-21 08:32:33,123 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} [2022-07-21 08:32:33,123 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 3 predicate places. [2022-07-21 08:32:33,123 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 107 transitions, 280 flow [2022-07-21 08:32:33,124 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) [2022-07-21 08:32:33,124 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:33,124 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] [2022-07-21 08:32:33,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 08:32:33,124 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:33,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2116980692, now seen corresponding path program 1 times [2022-07-21 08:32:33,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:33,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995253855] [2022-07-21 08:32:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:33,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:33,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:33,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995253855] [2022-07-21 08:32:33,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995253855] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:33,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:33,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:32:33,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791789299] [2022-07-21 08:32:33,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:33,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:32:33,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:33,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:32:33,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:32:33,192 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 122 [2022-07-21 08:32:33,193 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) [2022-07-21 08:32:33,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:33,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 122 [2022-07-21 08:32:33,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:33,321 INFO L129 PetriNetUnfolder]: 38/671 cut-off events. [2022-07-21 08:32:33,321 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-21 08:32:33,322 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. [2022-07-21 08:32:33,324 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 43 selfloop transitions, 9 changer transitions 0/122 dead transitions. [2022-07-21 08:32:33,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 122 transitions, 426 flow [2022-07-21 08:32:33,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:32:33,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:32:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 533 transitions. [2022-07-21 08:32:33,326 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7281420765027322 [2022-07-21 08:32:33,327 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 533 transitions. [2022-07-21 08:32:33,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 533 transitions. [2022-07-21 08:32:33,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:33,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 533 transitions. [2022-07-21 08:32:33,328 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) [2022-07-21 08:32:33,330 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) [2022-07-21 08:32:33,330 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) [2022-07-21 08:32:33,330 INFO L186 Difference]: Start difference. First operand has 114 places, 107 transitions, 280 flow. Second operand 6 states and 533 transitions. [2022-07-21 08:32:33,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 122 transitions, 426 flow [2022-07-21 08:32:33,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 122 transitions, 420 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:32:33,333 INFO L242 Difference]: Finished difference. Result has 119 places, 109 transitions, 310 flow [2022-07-21 08:32:33,334 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} [2022-07-21 08:32:33,334 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 8 predicate places. [2022-07-21 08:32:33,334 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 109 transitions, 310 flow [2022-07-21 08:32:33,335 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) [2022-07-21 08:32:33,335 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:33,335 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] [2022-07-21 08:32:33,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 08:32:33,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:33,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:33,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1026582369, now seen corresponding path program 1 times [2022-07-21 08:32:33,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:33,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944708787] [2022-07-21 08:32:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:33,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:33,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:33,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944708787] [2022-07-21 08:32:33,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944708787] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:32:33,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777570534] [2022-07-21 08:32:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:33,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:32:33,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:32:33,394 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) [2022-07-21 08:32:33,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:32:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:33,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 08:32:33,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:32:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:33,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:32:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:33,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777570534] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:32:33,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:32:33,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-21 08:32:33,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395785290] [2022-07-21 08:32:33,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:32:33,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:32:33,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:33,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:32:33,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-21 08:32:33,710 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 122 [2022-07-21 08:32:33,711 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) [2022-07-21 08:32:33,711 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:33,711 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 122 [2022-07-21 08:32:33,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:33,924 INFO L129 PetriNetUnfolder]: 35/646 cut-off events. [2022-07-21 08:32:33,924 INFO L130 PetriNetUnfolder]: For 128/128 co-relation queries the response was YES. [2022-07-21 08:32:33,925 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. [2022-07-21 08:32:33,927 INFO L132 encePairwiseOnDemand]: 110/122 looper letters, 36 selfloop transitions, 17 changer transitions 0/126 dead transitions. [2022-07-21 08:32:33,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 126 transitions, 464 flow [2022-07-21 08:32:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:32:33,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:32:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 874 transitions. [2022-07-21 08:32:33,930 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7163934426229508 [2022-07-21 08:32:33,930 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 874 transitions. [2022-07-21 08:32:33,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 874 transitions. [2022-07-21 08:32:33,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:33,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 874 transitions. [2022-07-21 08:32:33,933 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) [2022-07-21 08:32:33,935 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) [2022-07-21 08:32:33,935 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) [2022-07-21 08:32:33,936 INFO L186 Difference]: Start difference. First operand has 119 places, 109 transitions, 310 flow. Second operand 10 states and 874 transitions. [2022-07-21 08:32:33,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 126 transitions, 464 flow [2022-07-21 08:32:33,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 126 transitions, 454 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:32:33,939 INFO L242 Difference]: Finished difference. Result has 128 places, 116 transitions, 383 flow [2022-07-21 08:32:33,939 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} [2022-07-21 08:32:33,940 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 17 predicate places. [2022-07-21 08:32:33,940 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 116 transitions, 383 flow [2022-07-21 08:32:33,940 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) [2022-07-21 08:32:33,940 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:33,941 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] [2022-07-21 08:32:33,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:32:34,163 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 [2022-07-21 08:32:34,163 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:34,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1600686865, now seen corresponding path program 1 times [2022-07-21 08:32:34,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:34,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254321298] [2022-07-21 08:32:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:34,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:34,196 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:32:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:34,228 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:32:34,229 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:32:34,229 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:32:34,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:32:34,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 08:32:34,229 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-21 08:32:34,230 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:32:34,230 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:32:34,247 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-21 08:32:34,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 127 places, 128 transitions, 316 flow [2022-07-21 08:32:34,372 INFO L129 PetriNetUnfolder]: 190/1424 cut-off events. [2022-07-21 08:32:34,372 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-21 08:32:34,374 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. [2022-07-21 08:32:34,374 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 128 transitions, 316 flow [2022-07-21 08:32:34,377 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 118 transitions, 296 flow [2022-07-21 08:32:34,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:32:34,378 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@4f9d16d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b475044 [2022-07-21 08:32:34,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:32:34,383 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-07-21 08:32:34,383 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:32:34,383 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:34,383 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] [2022-07-21 08:32:34,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1696273977, now seen corresponding path program 1 times [2022-07-21 08:32:34,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:34,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189047561] [2022-07-21 08:32:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:34,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:34,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:34,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189047561] [2022-07-21 08:32:34,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189047561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:34,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:34,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:32:34,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736301314] [2022-07-21 08:32:34,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:34,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:32:34,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:32:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:32:34,401 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 128 [2022-07-21 08:32:34,402 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) [2022-07-21 08:32:34,402 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:34,402 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 128 [2022-07-21 08:32:34,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:34,502 INFO L129 PetriNetUnfolder]: 86/1032 cut-off events. [2022-07-21 08:32:34,503 INFO L130 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2022-07-21 08:32:34,506 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. [2022-07-21 08:32:34,508 INFO L132 encePairwiseOnDemand]: 123/128 looper letters, 10 selfloop transitions, 0 changer transitions 2/113 dead transitions. [2022-07-21 08:32:34,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 113 transitions, 306 flow [2022-07-21 08:32:34,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:32:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:32:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 237 transitions. [2022-07-21 08:32:34,510 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.92578125 [2022-07-21 08:32:34,510 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 237 transitions. [2022-07-21 08:32:34,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 237 transitions. [2022-07-21 08:32:34,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:34,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 237 transitions. [2022-07-21 08:32:34,511 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) [2022-07-21 08:32:34,512 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) [2022-07-21 08:32:34,512 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) [2022-07-21 08:32:34,512 INFO L186 Difference]: Start difference. First operand has 118 places, 118 transitions, 296 flow. Second operand 2 states and 237 transitions. [2022-07-21 08:32:34,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 113 transitions, 306 flow [2022-07-21 08:32:34,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 113 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:34,514 INFO L242 Difference]: Finished difference. Result has 119 places, 111 transitions, 282 flow [2022-07-21 08:32:34,515 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} [2022-07-21 08:32:34,515 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2022-07-21 08:32:34,515 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 111 transitions, 282 flow [2022-07-21 08:32:34,516 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) [2022-07-21 08:32:34,516 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:34,516 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] [2022-07-21 08:32:34,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 08:32:34,516 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:34,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1499760472, now seen corresponding path program 1 times [2022-07-21 08:32:34,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:34,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633623837] [2022-07-21 08:32:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:34,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:34,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:34,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633623837] [2022-07-21 08:32:34,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633623837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:34,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:34,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:32:34,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647291730] [2022-07-21 08:32:34,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:34,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:32:34,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:34,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:32:34,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:32:34,549 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 128 [2022-07-21 08:32:34,549 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) [2022-07-21 08:32:34,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:34,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 128 [2022-07-21 08:32:34,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:34,696 INFO L129 PetriNetUnfolder]: 90/1073 cut-off events. [2022-07-21 08:32:34,697 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-07-21 08:32:34,699 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. [2022-07-21 08:32:34,702 INFO L132 encePairwiseOnDemand]: 121/128 looper letters, 42 selfloop transitions, 5 changer transitions 0/124 dead transitions. [2022-07-21 08:32:34,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 124 transitions, 417 flow [2022-07-21 08:32:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:32:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:32:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 397 transitions. [2022-07-21 08:32:34,704 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.775390625 [2022-07-21 08:32:34,704 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 397 transitions. [2022-07-21 08:32:34,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 397 transitions. [2022-07-21 08:32:34,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:34,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 397 transitions. [2022-07-21 08:32:34,706 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) [2022-07-21 08:32:34,707 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) [2022-07-21 08:32:34,707 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) [2022-07-21 08:32:34,707 INFO L186 Difference]: Start difference. First operand has 119 places, 111 transitions, 282 flow. Second operand 4 states and 397 transitions. [2022-07-21 08:32:34,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 124 transitions, 417 flow [2022-07-21 08:32:34,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 124 transitions, 417 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:34,710 INFO L242 Difference]: Finished difference. Result has 121 places, 113 transitions, 308 flow [2022-07-21 08:32:34,711 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} [2022-07-21 08:32:34,711 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 3 predicate places. [2022-07-21 08:32:34,711 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 113 transitions, 308 flow [2022-07-21 08:32:34,711 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) [2022-07-21 08:32:34,712 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:34,712 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] [2022-07-21 08:32:34,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 08:32:34,712 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:34,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:34,712 INFO L85 PathProgramCache]: Analyzing trace with hash 548525699, now seen corresponding path program 1 times [2022-07-21 08:32:34,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:34,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212472081] [2022-07-21 08:32:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:34,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:34,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:34,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212472081] [2022-07-21 08:32:34,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212472081] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:34,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:34,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:32:34,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996693549] [2022-07-21 08:32:34,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:34,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:32:34,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:34,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:32:34,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:32:34,771 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 128 [2022-07-21 08:32:34,772 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) [2022-07-21 08:32:34,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:34,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 128 [2022-07-21 08:32:34,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:34,983 INFO L129 PetriNetUnfolder]: 90/1259 cut-off events. [2022-07-21 08:32:34,983 INFO L130 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2022-07-21 08:32:34,987 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. [2022-07-21 08:32:34,991 INFO L132 encePairwiseOnDemand]: 118/128 looper letters, 46 selfloop transitions, 9 changer transitions 0/129 dead transitions. [2022-07-21 08:32:34,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 129 transitions, 465 flow [2022-07-21 08:32:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:32:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:32:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 560 transitions. [2022-07-21 08:32:34,993 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2022-07-21 08:32:34,993 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 560 transitions. [2022-07-21 08:32:34,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 560 transitions. [2022-07-21 08:32:34,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:34,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 560 transitions. [2022-07-21 08:32:34,995 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) [2022-07-21 08:32:34,997 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) [2022-07-21 08:32:34,997 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) [2022-07-21 08:32:34,997 INFO L186 Difference]: Start difference. First operand has 121 places, 113 transitions, 308 flow. Second operand 6 states and 560 transitions. [2022-07-21 08:32:34,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 129 transitions, 465 flow [2022-07-21 08:32:34,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 129 transitions, 459 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:32:35,001 INFO L242 Difference]: Finished difference. Result has 126 places, 115 transitions, 338 flow [2022-07-21 08:32:35,001 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} [2022-07-21 08:32:35,002 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 8 predicate places. [2022-07-21 08:32:35,002 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 115 transitions, 338 flow [2022-07-21 08:32:35,002 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) [2022-07-21 08:32:35,002 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:35,003 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] [2022-07-21 08:32:35,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 08:32:35,003 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:35,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:35,003 INFO L85 PathProgramCache]: Analyzing trace with hash -815664214, now seen corresponding path program 1 times [2022-07-21 08:32:35,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:35,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902533383] [2022-07-21 08:32:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:35,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:35,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:35,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902533383] [2022-07-21 08:32:35,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902533383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:32:35,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302042968] [2022-07-21 08:32:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:35,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:32:35,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:32:35,061 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) [2022-07-21 08:32:35,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:32:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:35,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 08:32:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:32:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:35,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:32:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:35,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302042968] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:32:35,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:32:35,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-21 08:32:35,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562159469] [2022-07-21 08:32:35,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:32:35,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:32:35,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:35,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:32:35,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-21 08:32:35,372 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 128 [2022-07-21 08:32:35,373 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) [2022-07-21 08:32:35,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:35,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 128 [2022-07-21 08:32:35,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:35,633 INFO L129 PetriNetUnfolder]: 87/1234 cut-off events. [2022-07-21 08:32:35,633 INFO L130 PetriNetUnfolder]: For 264/264 co-relation queries the response was YES. [2022-07-21 08:32:35,636 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. [2022-07-21 08:32:35,639 INFO L132 encePairwiseOnDemand]: 116/128 looper letters, 39 selfloop transitions, 17 changer transitions 0/133 dead transitions. [2022-07-21 08:32:35,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 133 transitions, 503 flow [2022-07-21 08:32:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:32:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:32:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 917 transitions. [2022-07-21 08:32:35,642 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.71640625 [2022-07-21 08:32:35,642 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 917 transitions. [2022-07-21 08:32:35,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 917 transitions. [2022-07-21 08:32:35,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:35,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 917 transitions. [2022-07-21 08:32:35,644 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) [2022-07-21 08:32:35,647 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) [2022-07-21 08:32:35,647 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) [2022-07-21 08:32:35,647 INFO L186 Difference]: Start difference. First operand has 126 places, 115 transitions, 338 flow. Second operand 10 states and 917 transitions. [2022-07-21 08:32:35,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 133 transitions, 503 flow [2022-07-21 08:32:35,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 133 transitions, 493 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:32:35,651 INFO L242 Difference]: Finished difference. Result has 135 places, 122 transitions, 411 flow [2022-07-21 08:32:35,652 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} [2022-07-21 08:32:35,652 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 17 predicate places. [2022-07-21 08:32:35,652 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 122 transitions, 411 flow [2022-07-21 08:32:35,653 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) [2022-07-21 08:32:35,653 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:35,653 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] [2022-07-21 08:32:35,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 08:32:35,876 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 [2022-07-21 08:32:35,877 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:35,877 INFO L85 PathProgramCache]: Analyzing trace with hash -396988049, now seen corresponding path program 1 times [2022-07-21 08:32:35,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:35,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860421215] [2022-07-21 08:32:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:35,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-21 08:32:35,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:35,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860421215] [2022-07-21 08:32:35,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860421215] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:32:35,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631496844] [2022-07-21 08:32:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:35,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:32:35,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:32:35,950 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) [2022-07-21 08:32:35,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:32:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:36,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 08:32:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:32:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:36,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:32:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:36,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631496844] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:32:36,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:32:36,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-07-21 08:32:36,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127471914] [2022-07-21 08:32:36,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:32:36,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 08:32:36,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 08:32:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-07-21 08:32:36,428 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 128 [2022-07-21 08:32:36,430 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) [2022-07-21 08:32:36,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:36,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 128 [2022-07-21 08:32:36,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:36,645 INFO L129 PetriNetUnfolder]: 0/143 cut-off events. [2022-07-21 08:32:36,645 INFO L130 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-07-21 08:32:36,646 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. [2022-07-21 08:32:36,646 INFO L132 encePairwiseOnDemand]: 122/128 looper letters, 21 selfloop transitions, 17 changer transitions 0/101 dead transitions. [2022-07-21 08:32:36,646 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 101 transitions, 402 flow [2022-07-21 08:32:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 08:32:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-21 08:32:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1656 transitions. [2022-07-21 08:32:36,650 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.680921052631579 [2022-07-21 08:32:36,650 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1656 transitions. [2022-07-21 08:32:36,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1656 transitions. [2022-07-21 08:32:36,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:36,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1656 transitions. [2022-07-21 08:32:36,655 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) [2022-07-21 08:32:36,658 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) [2022-07-21 08:32:36,659 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) [2022-07-21 08:32:36,659 INFO L186 Difference]: Start difference. First operand has 135 places, 122 transitions, 411 flow. Second operand 19 states and 1656 transitions. [2022-07-21 08:32:36,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 101 transitions, 402 flow [2022-07-21 08:32:36,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 101 transitions, 356 flow, removed 14 selfloop flow, removed 7 redundant places. [2022-07-21 08:32:36,662 INFO L242 Difference]: Finished difference. Result has 119 places, 92 transitions, 286 flow [2022-07-21 08:32:36,662 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} [2022-07-21 08:32:36,662 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2022-07-21 08:32:36,663 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 92 transitions, 286 flow [2022-07-21 08:32:36,663 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) [2022-07-21 08:32:36,664 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:36,664 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] [2022-07-21 08:32:36,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 08:32:36,878 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 [2022-07-21 08:32:36,878 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:36,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:36,878 INFO L85 PathProgramCache]: Analyzing trace with hash 530958294, now seen corresponding path program 1 times [2022-07-21 08:32:36,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:36,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869969425] [2022-07-21 08:32:36,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:36,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:36,924 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:32:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:36,971 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:32:36,972 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:32:36,972 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:32:36,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:32:36,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 08:32:36,973 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:32:36,974 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:32:36,975 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-21 08:32:36,991 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-21 08:32:36,992 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 134 transitions, 346 flow [2022-07-21 08:32:37,250 INFO L129 PetriNetUnfolder]: 400/2742 cut-off events. [2022-07-21 08:32:37,250 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-21 08:32:37,257 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. [2022-07-21 08:32:37,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 134 transitions, 346 flow [2022-07-21 08:32:37,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 124 transitions, 326 flow [2022-07-21 08:32:37,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:32:37,265 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@4f9d16d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b475044 [2022-07-21 08:32:37,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:32:37,269 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-07-21 08:32:37,269 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:32:37,269 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:37,270 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] [2022-07-21 08:32:37,270 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:37,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1953747134, now seen corresponding path program 1 times [2022-07-21 08:32:37,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:37,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873659383] [2022-07-21 08:32:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:37,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:37,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:37,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873659383] [2022-07-21 08:32:37,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873659383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:37,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:37,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:32:37,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144351260] [2022-07-21 08:32:37,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:37,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:32:37,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:37,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:32:37,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:32:37,287 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 134 [2022-07-21 08:32:37,287 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) [2022-07-21 08:32:37,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:37,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 134 [2022-07-21 08:32:37,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:37,499 INFO L129 PetriNetUnfolder]: 199/1965 cut-off events. [2022-07-21 08:32:37,500 INFO L130 PetriNetUnfolder]: For 647/647 co-relation queries the response was YES. [2022-07-21 08:32:37,506 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. [2022-07-21 08:32:37,511 INFO L132 encePairwiseOnDemand]: 129/134 looper letters, 12 selfloop transitions, 0 changer transitions 2/119 dead transitions. [2022-07-21 08:32:37,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 119 transitions, 340 flow [2022-07-21 08:32:37,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:32:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:32:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 247 transitions. [2022-07-21 08:32:37,513 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9216417910447762 [2022-07-21 08:32:37,513 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 247 transitions. [2022-07-21 08:32:37,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 247 transitions. [2022-07-21 08:32:37,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:37,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 247 transitions. [2022-07-21 08:32:37,514 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) [2022-07-21 08:32:37,515 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) [2022-07-21 08:32:37,515 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) [2022-07-21 08:32:37,515 INFO L186 Difference]: Start difference. First operand has 125 places, 124 transitions, 326 flow. Second operand 2 states and 247 transitions. [2022-07-21 08:32:37,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 119 transitions, 340 flow [2022-07-21 08:32:37,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 119 transitions, 340 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:37,518 INFO L242 Difference]: Finished difference. Result has 126 places, 117 transitions, 312 flow [2022-07-21 08:32:37,518 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} [2022-07-21 08:32:37,518 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, 1 predicate places. [2022-07-21 08:32:37,518 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 117 transitions, 312 flow [2022-07-21 08:32:37,519 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) [2022-07-21 08:32:37,519 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:37,519 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] [2022-07-21 08:32:37,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 08:32:37,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:37,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:37,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1650229986, now seen corresponding path program 1 times [2022-07-21 08:32:37,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:37,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326802963] [2022-07-21 08:32:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:37,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:37,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:37,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326802963] [2022-07-21 08:32:37,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326802963] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:37,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:37,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:32:37,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700743126] [2022-07-21 08:32:37,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:37,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:32:37,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:37,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:32:37,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:32:37,553 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 134 [2022-07-21 08:32:37,553 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) [2022-07-21 08:32:37,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:37,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 134 [2022-07-21 08:32:37,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:37,824 INFO L129 PetriNetUnfolder]: 207/2034 cut-off events. [2022-07-21 08:32:37,824 INFO L130 PetriNetUnfolder]: For 257/257 co-relation queries the response was YES. [2022-07-21 08:32:37,830 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. [2022-07-21 08:32:37,836 INFO L132 encePairwiseOnDemand]: 127/134 looper letters, 45 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2022-07-21 08:32:37,836 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 131 transitions, 458 flow [2022-07-21 08:32:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:32:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:32:37,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 416 transitions. [2022-07-21 08:32:37,838 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7761194029850746 [2022-07-21 08:32:37,838 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 416 transitions. [2022-07-21 08:32:37,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 416 transitions. [2022-07-21 08:32:37,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:37,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 416 transitions. [2022-07-21 08:32:37,839 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) [2022-07-21 08:32:37,840 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) [2022-07-21 08:32:37,841 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) [2022-07-21 08:32:37,841 INFO L186 Difference]: Start difference. First operand has 126 places, 117 transitions, 312 flow. Second operand 4 states and 416 transitions. [2022-07-21 08:32:37,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 131 transitions, 458 flow [2022-07-21 08:32:37,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 131 transitions, 458 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:37,844 INFO L242 Difference]: Finished difference. Result has 128 places, 119 transitions, 338 flow [2022-07-21 08:32:37,844 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} [2022-07-21 08:32:37,845 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, 3 predicate places. [2022-07-21 08:32:37,845 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 119 transitions, 338 flow [2022-07-21 08:32:37,845 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) [2022-07-21 08:32:37,845 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:37,845 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] [2022-07-21 08:32:37,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 08:32:37,846 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:37,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:37,846 INFO L85 PathProgramCache]: Analyzing trace with hash -22498912, now seen corresponding path program 1 times [2022-07-21 08:32:37,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:37,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639672947] [2022-07-21 08:32:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:37,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:37,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:37,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639672947] [2022-07-21 08:32:37,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639672947] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:37,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:37,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:32:37,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20838986] [2022-07-21 08:32:37,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:37,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:32:37,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:32:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:32:37,901 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 134 [2022-07-21 08:32:37,902 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) [2022-07-21 08:32:37,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:37,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 134 [2022-07-21 08:32:37,902 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:38,268 INFO L129 PetriNetUnfolder]: 207/2412 cut-off events. [2022-07-21 08:32:38,268 INFO L130 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-07-21 08:32:38,274 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. [2022-07-21 08:32:38,282 INFO L132 encePairwiseOnDemand]: 124/134 looper letters, 49 selfloop transitions, 9 changer transitions 0/136 dead transitions. [2022-07-21 08:32:38,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 136 transitions, 506 flow [2022-07-21 08:32:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:32:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:32:38,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 587 transitions. [2022-07-21 08:32:38,284 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7300995024875622 [2022-07-21 08:32:38,284 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 587 transitions. [2022-07-21 08:32:38,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 587 transitions. [2022-07-21 08:32:38,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:38,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 587 transitions. [2022-07-21 08:32:38,286 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) [2022-07-21 08:32:38,287 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) [2022-07-21 08:32:38,288 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) [2022-07-21 08:32:38,288 INFO L186 Difference]: Start difference. First operand has 128 places, 119 transitions, 338 flow. Second operand 6 states and 587 transitions. [2022-07-21 08:32:38,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 136 transitions, 506 flow [2022-07-21 08:32:38,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 136 transitions, 500 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:32:38,291 INFO L242 Difference]: Finished difference. Result has 133 places, 121 transitions, 368 flow [2022-07-21 08:32:38,292 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} [2022-07-21 08:32:38,292 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, 8 predicate places. [2022-07-21 08:32:38,292 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 121 transitions, 368 flow [2022-07-21 08:32:38,293 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) [2022-07-21 08:32:38,293 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:38,293 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] [2022-07-21 08:32:38,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 08:32:38,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:38,294 INFO L85 PathProgramCache]: Analyzing trace with hash 702817143, now seen corresponding path program 1 times [2022-07-21 08:32:38,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:38,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968444659] [2022-07-21 08:32:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:38,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:38,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:38,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968444659] [2022-07-21 08:32:38,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968444659] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:32:38,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518235689] [2022-07-21 08:32:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:38,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:32:38,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:32:38,348 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) [2022-07-21 08:32:38,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 08:32:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:38,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 08:32:38,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:32:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:38,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:32:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:38,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518235689] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:32:38,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:32:38,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-21 08:32:38,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740284565] [2022-07-21 08:32:38,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:32:38,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:32:38,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:38,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:32:38,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-21 08:32:38,667 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 134 [2022-07-21 08:32:38,668 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) [2022-07-21 08:32:38,668 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:38,668 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 134 [2022-07-21 08:32:38,668 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:39,109 INFO L129 PetriNetUnfolder]: 204/2387 cut-off events. [2022-07-21 08:32:39,109 INFO L130 PetriNetUnfolder]: For 536/536 co-relation queries the response was YES. [2022-07-21 08:32:39,118 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. [2022-07-21 08:32:39,125 INFO L132 encePairwiseOnDemand]: 122/134 looper letters, 42 selfloop transitions, 17 changer transitions 0/140 dead transitions. [2022-07-21 08:32:39,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 140 transitions, 544 flow [2022-07-21 08:32:39,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:32:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:32:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 960 transitions. [2022-07-21 08:32:39,128 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7164179104477612 [2022-07-21 08:32:39,128 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 960 transitions. [2022-07-21 08:32:39,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 960 transitions. [2022-07-21 08:32:39,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:39,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 960 transitions. [2022-07-21 08:32:39,130 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) [2022-07-21 08:32:39,132 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) [2022-07-21 08:32:39,133 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) [2022-07-21 08:32:39,133 INFO L186 Difference]: Start difference. First operand has 133 places, 121 transitions, 368 flow. Second operand 10 states and 960 transitions. [2022-07-21 08:32:39,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 140 transitions, 544 flow [2022-07-21 08:32:39,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 140 transitions, 534 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:32:39,139 INFO L242 Difference]: Finished difference. Result has 142 places, 128 transitions, 441 flow [2022-07-21 08:32:39,140 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} [2022-07-21 08:32:39,140 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, 17 predicate places. [2022-07-21 08:32:39,140 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 128 transitions, 441 flow [2022-07-21 08:32:39,141 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) [2022-07-21 08:32:39,141 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:39,141 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] [2022-07-21 08:32:39,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 08:32:39,355 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 [2022-07-21 08:32:39,355 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:39,356 INFO L85 PathProgramCache]: Analyzing trace with hash 318277048, now seen corresponding path program 1 times [2022-07-21 08:32:39,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:39,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216751526] [2022-07-21 08:32:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:39,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-21 08:32:39,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:39,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216751526] [2022-07-21 08:32:39,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216751526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:32:39,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358660269] [2022-07-21 08:32:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:39,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:32:39,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:32:39,444 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) [2022-07-21 08:32:39,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 08:32:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:39,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 08:32:39,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:32:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:39,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:32:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:39,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358660269] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:32:39,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:32:39,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-07-21 08:32:39,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315143284] [2022-07-21 08:32:39,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:32:39,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 08:32:39,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:39,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 08:32:39,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-07-21 08:32:39,944 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 134 [2022-07-21 08:32:39,946 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) [2022-07-21 08:32:39,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:39,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 134 [2022-07-21 08:32:39,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:40,187 INFO L129 PetriNetUnfolder]: 0/162 cut-off events. [2022-07-21 08:32:40,187 INFO L130 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-07-21 08:32:40,188 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. [2022-07-21 08:32:40,188 INFO L132 encePairwiseOnDemand]: 128/134 looper letters, 24 selfloop transitions, 20 changer transitions 0/111 dead transitions. [2022-07-21 08:32:40,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 111 transitions, 463 flow [2022-07-21 08:32:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 08:32:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-21 08:32:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2006 transitions. [2022-07-21 08:32:40,194 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.680461329715061 [2022-07-21 08:32:40,194 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2006 transitions. [2022-07-21 08:32:40,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2006 transitions. [2022-07-21 08:32:40,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:40,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2006 transitions. [2022-07-21 08:32:40,199 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) [2022-07-21 08:32:40,215 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) [2022-07-21 08:32:40,217 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) [2022-07-21 08:32:40,217 INFO L186 Difference]: Start difference. First operand has 142 places, 128 transitions, 441 flow. Second operand 22 states and 2006 transitions. [2022-07-21 08:32:40,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 111 transitions, 463 flow [2022-07-21 08:32:40,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 111 transitions, 403 flow, removed 20 selfloop flow, removed 7 redundant places. [2022-07-21 08:32:40,220 INFO L242 Difference]: Finished difference. Result has 129 places, 100 transitions, 320 flow [2022-07-21 08:32:40,220 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} [2022-07-21 08:32:40,221 INFO L279 CegarLoopForPetriNet]: 125 programPoint places, 4 predicate places. [2022-07-21 08:32:40,221 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 100 transitions, 320 flow [2022-07-21 08:32:40,222 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) [2022-07-21 08:32:40,222 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:40,222 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] [2022-07-21 08:32:40,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 08:32:40,436 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 [2022-07-21 08:32:40,437 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:40,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:40,437 INFO L85 PathProgramCache]: Analyzing trace with hash 66243864, now seen corresponding path program 1 times [2022-07-21 08:32:40,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:40,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156344231] [2022-07-21 08:32:40,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:40,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:40,481 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:32:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:40,532 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:32:40,532 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:32:40,533 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:32:40,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:32:40,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-21 08:32:40,533 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:32:40,535 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:32:40,535 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-21 08:32:40,558 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-21 08:32:40,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 140 transitions, 378 flow [2022-07-21 08:32:41,153 INFO L129 PetriNetUnfolder]: 850/5388 cut-off events. [2022-07-21 08:32:41,155 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-21 08:32:41,170 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. [2022-07-21 08:32:41,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 140 transitions, 378 flow [2022-07-21 08:32:41,183 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 130 transitions, 358 flow [2022-07-21 08:32:41,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:32:41,184 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@4f9d16d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b475044 [2022-07-21 08:32:41,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:32:41,188 INFO L129 PetriNetUnfolder]: 6/81 cut-off events. [2022-07-21 08:32:41,188 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:32:41,188 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:41,189 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] [2022-07-21 08:32:41,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:41,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:41,189 INFO L85 PathProgramCache]: Analyzing trace with hash -379929367, now seen corresponding path program 1 times [2022-07-21 08:32:41,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:41,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615854267] [2022-07-21 08:32:41,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:41,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:41,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:41,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615854267] [2022-07-21 08:32:41,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615854267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:41,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:41,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:32:41,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672862101] [2022-07-21 08:32:41,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:41,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:32:41,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:41,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:32:41,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:32:41,206 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 140 [2022-07-21 08:32:41,207 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) [2022-07-21 08:32:41,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:41,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 140 [2022-07-21 08:32:41,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:41,673 INFO L129 PetriNetUnfolder]: 456/3842 cut-off events. [2022-07-21 08:32:41,673 INFO L130 PetriNetUnfolder]: For 1449/1449 co-relation queries the response was YES. [2022-07-21 08:32:41,682 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. [2022-07-21 08:32:41,690 INFO L132 encePairwiseOnDemand]: 135/140 looper letters, 14 selfloop transitions, 0 changer transitions 2/125 dead transitions. [2022-07-21 08:32:41,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 125 transitions, 376 flow [2022-07-21 08:32:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:32:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:32:41,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 257 transitions. [2022-07-21 08:32:41,692 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9178571428571428 [2022-07-21 08:32:41,692 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 257 transitions. [2022-07-21 08:32:41,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 257 transitions. [2022-07-21 08:32:41,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:41,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 257 transitions. [2022-07-21 08:32:41,693 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) [2022-07-21 08:32:41,694 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) [2022-07-21 08:32:41,694 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) [2022-07-21 08:32:41,694 INFO L186 Difference]: Start difference. First operand has 132 places, 130 transitions, 358 flow. Second operand 2 states and 257 transitions. [2022-07-21 08:32:41,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 125 transitions, 376 flow [2022-07-21 08:32:41,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 125 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:41,697 INFO L242 Difference]: Finished difference. Result has 133 places, 123 transitions, 344 flow [2022-07-21 08:32:41,697 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} [2022-07-21 08:32:41,698 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, 1 predicate places. [2022-07-21 08:32:41,698 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 123 transitions, 344 flow [2022-07-21 08:32:41,698 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) [2022-07-21 08:32:41,698 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:41,698 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] [2022-07-21 08:32:41,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-21 08:32:41,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:41,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:41,699 INFO L85 PathProgramCache]: Analyzing trace with hash 507574314, now seen corresponding path program 1 times [2022-07-21 08:32:41,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:41,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135703594] [2022-07-21 08:32:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:41,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:41,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:41,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135703594] [2022-07-21 08:32:41,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135703594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:41,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:41,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:32:41,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395725288] [2022-07-21 08:32:41,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:41,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:32:41,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:41,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:32:41,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:32:41,730 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 140 [2022-07-21 08:32:41,730 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) [2022-07-21 08:32:41,730 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:41,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 140 [2022-07-21 08:32:41,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:42,290 INFO L129 PetriNetUnfolder]: 469/3944 cut-off events. [2022-07-21 08:32:42,290 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-21 08:32:42,302 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. [2022-07-21 08:32:42,311 INFO L132 encePairwiseOnDemand]: 133/140 looper letters, 48 selfloop transitions, 5 changer transitions 0/138 dead transitions. [2022-07-21 08:32:42,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 138 transitions, 501 flow [2022-07-21 08:32:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:32:42,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:32:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 435 transitions. [2022-07-21 08:32:42,313 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7767857142857143 [2022-07-21 08:32:42,313 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 435 transitions. [2022-07-21 08:32:42,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 435 transitions. [2022-07-21 08:32:42,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:42,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 435 transitions. [2022-07-21 08:32:42,314 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) [2022-07-21 08:32:42,315 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) [2022-07-21 08:32:42,315 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) [2022-07-21 08:32:42,315 INFO L186 Difference]: Start difference. First operand has 133 places, 123 transitions, 344 flow. Second operand 4 states and 435 transitions. [2022-07-21 08:32:42,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 138 transitions, 501 flow [2022-07-21 08:32:42,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 138 transitions, 501 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:42,319 INFO L242 Difference]: Finished difference. Result has 135 places, 125 transitions, 370 flow [2022-07-21 08:32:42,319 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} [2022-07-21 08:32:42,320 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, 3 predicate places. [2022-07-21 08:32:42,320 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 125 transitions, 370 flow [2022-07-21 08:32:42,320 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) [2022-07-21 08:32:42,320 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:42,320 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] [2022-07-21 08:32:42,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-21 08:32:42,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:42,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:42,321 INFO L85 PathProgramCache]: Analyzing trace with hash -319319933, now seen corresponding path program 1 times [2022-07-21 08:32:42,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:42,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537037735] [2022-07-21 08:32:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:42,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:42,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:42,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537037735] [2022-07-21 08:32:42,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537037735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:42,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:42,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:32:42,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587312539] [2022-07-21 08:32:42,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:42,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:32:42,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:32:42,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:32:42,378 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 140 [2022-07-21 08:32:42,379 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) [2022-07-21 08:32:42,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:42,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 140 [2022-07-21 08:32:42,379 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:43,094 INFO L129 PetriNetUnfolder]: 469/4706 cut-off events. [2022-07-21 08:32:43,095 INFO L130 PetriNetUnfolder]: For 684/684 co-relation queries the response was YES. [2022-07-21 08:32:43,108 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. [2022-07-21 08:32:43,118 INFO L132 encePairwiseOnDemand]: 130/140 looper letters, 52 selfloop transitions, 9 changer transitions 0/143 dead transitions. [2022-07-21 08:32:43,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 143 transitions, 549 flow [2022-07-21 08:32:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:32:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:32:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 614 transitions. [2022-07-21 08:32:43,120 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7309523809523809 [2022-07-21 08:32:43,120 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 614 transitions. [2022-07-21 08:32:43,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 614 transitions. [2022-07-21 08:32:43,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:43,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 614 transitions. [2022-07-21 08:32:43,122 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) [2022-07-21 08:32:43,123 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) [2022-07-21 08:32:43,123 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) [2022-07-21 08:32:43,123 INFO L186 Difference]: Start difference. First operand has 135 places, 125 transitions, 370 flow. Second operand 6 states and 614 transitions. [2022-07-21 08:32:43,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 143 transitions, 549 flow [2022-07-21 08:32:43,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 143 transitions, 543 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:32:43,128 INFO L242 Difference]: Finished difference. Result has 140 places, 127 transitions, 400 flow [2022-07-21 08:32:43,129 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} [2022-07-21 08:32:43,129 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, 8 predicate places. [2022-07-21 08:32:43,129 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 127 transitions, 400 flow [2022-07-21 08:32:43,129 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) [2022-07-21 08:32:43,130 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:43,130 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] [2022-07-21 08:32:43,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-21 08:32:43,130 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:43,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:43,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1184050624, now seen corresponding path program 1 times [2022-07-21 08:32:43,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:43,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131077830] [2022-07-21 08:32:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:43,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:43,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:43,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131077830] [2022-07-21 08:32:43,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131077830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:32:43,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974606337] [2022-07-21 08:32:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:43,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:32:43,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:32:43,192 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) [2022-07-21 08:32:43,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 08:32:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:43,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 08:32:43,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:32:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:43,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:32:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:43,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974606337] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:32:43,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:32:43,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-21 08:32:43,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151686110] [2022-07-21 08:32:43,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:32:43,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:32:43,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:43,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:32:43,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-21 08:32:43,511 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 140 [2022-07-21 08:32:43,512 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) [2022-07-21 08:32:43,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:43,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 140 [2022-07-21 08:32:43,512 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:44,282 INFO L129 PetriNetUnfolder]: 466/4681 cut-off events. [2022-07-21 08:32:44,283 INFO L130 PetriNetUnfolder]: For 1089/1089 co-relation queries the response was YES. [2022-07-21 08:32:44,295 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. [2022-07-21 08:32:44,305 INFO L132 encePairwiseOnDemand]: 128/140 looper letters, 45 selfloop transitions, 17 changer transitions 0/147 dead transitions. [2022-07-21 08:32:44,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 147 transitions, 587 flow [2022-07-21 08:32:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:32:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:32:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1003 transitions. [2022-07-21 08:32:44,308 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7164285714285714 [2022-07-21 08:32:44,308 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1003 transitions. [2022-07-21 08:32:44,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1003 transitions. [2022-07-21 08:32:44,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:44,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1003 transitions. [2022-07-21 08:32:44,310 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) [2022-07-21 08:32:44,312 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) [2022-07-21 08:32:44,312 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) [2022-07-21 08:32:44,312 INFO L186 Difference]: Start difference. First operand has 140 places, 127 transitions, 400 flow. Second operand 10 states and 1003 transitions. [2022-07-21 08:32:44,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 147 transitions, 587 flow [2022-07-21 08:32:44,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 147 transitions, 577 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:32:44,324 INFO L242 Difference]: Finished difference. Result has 149 places, 134 transitions, 473 flow [2022-07-21 08:32:44,324 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} [2022-07-21 08:32:44,325 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, 17 predicate places. [2022-07-21 08:32:44,325 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 134 transitions, 473 flow [2022-07-21 08:32:44,326 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) [2022-07-21 08:32:44,326 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:44,326 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] [2022-07-21 08:32:44,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 08:32:44,551 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 [2022-07-21 08:32:44,551 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:44,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1469236097, now seen corresponding path program 1 times [2022-07-21 08:32:44,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:44,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485076432] [2022-07-21 08:32:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:44,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-21 08:32:44,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:44,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485076432] [2022-07-21 08:32:44,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485076432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:32:44,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477890138] [2022-07-21 08:32:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:44,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:32:44,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:32:44,631 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) [2022-07-21 08:32:44,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 08:32:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:44,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 08:32:44,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:32:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:45,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:32:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:45,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477890138] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:32:45,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:32:45,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-07-21 08:32:45,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644418429] [2022-07-21 08:32:45,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:32:45,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 08:32:45,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:45,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 08:32:45,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-07-21 08:32:45,185 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 140 [2022-07-21 08:32:45,186 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) [2022-07-21 08:32:45,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:45,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 140 [2022-07-21 08:32:45,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:46,190 INFO L129 PetriNetUnfolder]: 441/4410 cut-off events. [2022-07-21 08:32:46,190 INFO L130 PetriNetUnfolder]: For 2652/2652 co-relation queries the response was YES. [2022-07-21 08:32:46,200 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. [2022-07-21 08:32:46,209 INFO L132 encePairwiseOnDemand]: 125/140 looper letters, 63 selfloop transitions, 32 changer transitions 0/179 dead transitions. [2022-07-21 08:32:46,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 179 transitions, 865 flow [2022-07-21 08:32:46,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 08:32:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-21 08:32:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2331 transitions. [2022-07-21 08:32:46,215 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.69375 [2022-07-21 08:32:46,215 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2331 transitions. [2022-07-21 08:32:46,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2331 transitions. [2022-07-21 08:32:46,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:46,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2331 transitions. [2022-07-21 08:32:46,223 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) [2022-07-21 08:32:46,227 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) [2022-07-21 08:32:46,228 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) [2022-07-21 08:32:46,229 INFO L186 Difference]: Start difference. First operand has 149 places, 134 transitions, 473 flow. Second operand 24 states and 2331 transitions. [2022-07-21 08:32:46,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 179 transitions, 865 flow [2022-07-21 08:32:46,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 179 transitions, 844 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-07-21 08:32:46,249 INFO L242 Difference]: Finished difference. Result has 178 places, 151 transitions, 661 flow [2022-07-21 08:32:46,250 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} [2022-07-21 08:32:46,250 INFO L279 CegarLoopForPetriNet]: 132 programPoint places, 46 predicate places. [2022-07-21 08:32:46,250 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 151 transitions, 661 flow [2022-07-21 08:32:46,251 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) [2022-07-21 08:32:46,251 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:46,251 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] [2022-07-21 08:32:46,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 08:32:46,462 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 [2022-07-21 08:32:46,463 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:46,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:46,463 INFO L85 PathProgramCache]: Analyzing trace with hash -770212857, now seen corresponding path program 1 times [2022-07-21 08:32:46,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:46,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207473515] [2022-07-21 08:32:46,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:46,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:46,507 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:32:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:46,579 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:32:46,580 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:32:46,580 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:32:46,580 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:32:46,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-21 08:32:46,581 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:32:46,582 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:32:46,582 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-21 08:32:46,599 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-21 08:32:46,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 412 flow [2022-07-21 08:32:47,462 INFO L129 PetriNetUnfolder]: 1812/10722 cut-off events. [2022-07-21 08:32:47,462 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-07-21 08:32:47,491 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. [2022-07-21 08:32:47,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 412 flow [2022-07-21 08:32:47,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 136 transitions, 392 flow [2022-07-21 08:32:47,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:32:47,511 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@4f9d16d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b475044 [2022-07-21 08:32:47,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:32:47,515 INFO L129 PetriNetUnfolder]: 6/80 cut-off events. [2022-07-21 08:32:47,515 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:32:47,515 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:47,515 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] [2022-07-21 08:32:47,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash -420247715, now seen corresponding path program 1 times [2022-07-21 08:32:47,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:47,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969979483] [2022-07-21 08:32:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:47,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:47,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:47,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969979483] [2022-07-21 08:32:47,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969979483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:47,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:47,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:32:47,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646615227] [2022-07-21 08:32:47,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:47,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:32:47,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:32:47,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:32:47,531 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 146 [2022-07-21 08:32:47,531 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) [2022-07-21 08:32:47,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:47,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 146 [2022-07-21 08:32:47,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:48,361 INFO L129 PetriNetUnfolder]: 1033/7639 cut-off events. [2022-07-21 08:32:48,361 INFO L130 PetriNetUnfolder]: For 3220/3220 co-relation queries the response was YES. [2022-07-21 08:32:48,393 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. [2022-07-21 08:32:48,412 INFO L132 encePairwiseOnDemand]: 141/146 looper letters, 16 selfloop transitions, 0 changer transitions 2/131 dead transitions. [2022-07-21 08:32:48,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 131 transitions, 414 flow [2022-07-21 08:32:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:32:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:32:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 267 transitions. [2022-07-21 08:32:48,413 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9143835616438356 [2022-07-21 08:32:48,413 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 267 transitions. [2022-07-21 08:32:48,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 267 transitions. [2022-07-21 08:32:48,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:48,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 267 transitions. [2022-07-21 08:32:48,414 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) [2022-07-21 08:32:48,415 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) [2022-07-21 08:32:48,415 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) [2022-07-21 08:32:48,415 INFO L186 Difference]: Start difference. First operand has 139 places, 136 transitions, 392 flow. Second operand 2 states and 267 transitions. [2022-07-21 08:32:48,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 131 transitions, 414 flow [2022-07-21 08:32:48,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 131 transitions, 414 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:48,419 INFO L242 Difference]: Finished difference. Result has 140 places, 129 transitions, 378 flow [2022-07-21 08:32:48,419 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} [2022-07-21 08:32:48,419 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 1 predicate places. [2022-07-21 08:32:48,419 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 129 transitions, 378 flow [2022-07-21 08:32:48,420 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) [2022-07-21 08:32:48,420 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:48,420 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:32:48,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-21 08:32:48,420 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:48,421 INFO L85 PathProgramCache]: Analyzing trace with hash -616761220, now seen corresponding path program 1 times [2022-07-21 08:32:48,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:48,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157427830] [2022-07-21 08:32:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:48,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:48,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:48,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157427830] [2022-07-21 08:32:48,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157427830] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:48,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:48,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:32:48,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737823097] [2022-07-21 08:32:48,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:48,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:32:48,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:48,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:32:48,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:32:48,450 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 146 [2022-07-21 08:32:48,451 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) [2022-07-21 08:32:48,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:48,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 146 [2022-07-21 08:32:48,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:49,425 INFO L129 PetriNetUnfolder]: 1052/7779 cut-off events. [2022-07-21 08:32:49,425 INFO L130 PetriNetUnfolder]: For 1164/1164 co-relation queries the response was YES. [2022-07-21 08:32:49,456 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. [2022-07-21 08:32:49,471 INFO L132 encePairwiseOnDemand]: 139/146 looper letters, 51 selfloop transitions, 5 changer transitions 0/145 dead transitions. [2022-07-21 08:32:49,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 145 transitions, 546 flow [2022-07-21 08:32:49,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:32:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:32:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 454 transitions. [2022-07-21 08:32:49,473 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7773972602739726 [2022-07-21 08:32:49,473 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 454 transitions. [2022-07-21 08:32:49,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 454 transitions. [2022-07-21 08:32:49,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:49,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 454 transitions. [2022-07-21 08:32:49,474 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) [2022-07-21 08:32:49,475 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) [2022-07-21 08:32:49,475 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) [2022-07-21 08:32:49,475 INFO L186 Difference]: Start difference. First operand has 140 places, 129 transitions, 378 flow. Second operand 4 states and 454 transitions. [2022-07-21 08:32:49,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 145 transitions, 546 flow [2022-07-21 08:32:49,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 145 transitions, 546 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:49,479 INFO L242 Difference]: Finished difference. Result has 142 places, 131 transitions, 404 flow [2022-07-21 08:32:49,480 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} [2022-07-21 08:32:49,480 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 3 predicate places. [2022-07-21 08:32:49,481 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 131 transitions, 404 flow [2022-07-21 08:32:49,481 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) [2022-07-21 08:32:49,481 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:49,481 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] [2022-07-21 08:32:49,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-21 08:32:49,482 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:49,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:49,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1535337772, now seen corresponding path program 1 times [2022-07-21 08:32:49,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:49,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425712156] [2022-07-21 08:32:49,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:49,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:49,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:49,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425712156] [2022-07-21 08:32:49,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425712156] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:49,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:49,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:32:49,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099548012] [2022-07-21 08:32:49,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:49,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:32:49,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:49,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:32:49,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:32:49,539 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 146 [2022-07-21 08:32:49,539 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) [2022-07-21 08:32:49,539 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:49,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 146 [2022-07-21 08:32:49,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:50,661 INFO L129 PetriNetUnfolder]: 1052/9309 cut-off events. [2022-07-21 08:32:50,662 INFO L130 PetriNetUnfolder]: For 1431/1431 co-relation queries the response was YES. [2022-07-21 08:32:50,692 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. [2022-07-21 08:32:50,706 INFO L132 encePairwiseOnDemand]: 136/146 looper letters, 55 selfloop transitions, 9 changer transitions 0/150 dead transitions. [2022-07-21 08:32:50,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 150 transitions, 594 flow [2022-07-21 08:32:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:32:50,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:32:50,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 641 transitions. [2022-07-21 08:32:50,708 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7317351598173516 [2022-07-21 08:32:50,708 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 641 transitions. [2022-07-21 08:32:50,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 641 transitions. [2022-07-21 08:32:50,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:50,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 641 transitions. [2022-07-21 08:32:50,709 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) [2022-07-21 08:32:50,710 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) [2022-07-21 08:32:50,711 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) [2022-07-21 08:32:50,711 INFO L186 Difference]: Start difference. First operand has 142 places, 131 transitions, 404 flow. Second operand 6 states and 641 transitions. [2022-07-21 08:32:50,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 150 transitions, 594 flow [2022-07-21 08:32:50,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 150 transitions, 588 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:32:50,716 INFO L242 Difference]: Finished difference. Result has 147 places, 133 transitions, 434 flow [2022-07-21 08:32:50,716 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} [2022-07-21 08:32:50,717 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 8 predicate places. [2022-07-21 08:32:50,717 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 133 transitions, 434 flow [2022-07-21 08:32:50,717 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) [2022-07-21 08:32:50,717 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:50,717 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] [2022-07-21 08:32:50,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-21 08:32:50,718 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:50,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1355363639, now seen corresponding path program 1 times [2022-07-21 08:32:50,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:50,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318157470] [2022-07-21 08:32:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:50,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:50,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:50,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318157470] [2022-07-21 08:32:50,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318157470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:32:50,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871572063] [2022-07-21 08:32:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:50,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:32:50,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:32:50,765 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) [2022-07-21 08:32:50,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 08:32:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:50,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 08:32:50,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:32:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:51,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:32:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:51,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871572063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:32:51,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:32:51,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-21 08:32:51,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897517877] [2022-07-21 08:32:51,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:32:51,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:32:51,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:51,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:32:51,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-21 08:32:51,107 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 146 [2022-07-21 08:32:51,108 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) [2022-07-21 08:32:51,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:51,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 146 [2022-07-21 08:32:51,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:52,357 INFO L129 PetriNetUnfolder]: 1049/9284 cut-off events. [2022-07-21 08:32:52,358 INFO L130 PetriNetUnfolder]: For 2228/2228 co-relation queries the response was YES. [2022-07-21 08:32:52,382 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. [2022-07-21 08:32:52,396 INFO L132 encePairwiseOnDemand]: 134/146 looper letters, 48 selfloop transitions, 17 changer transitions 0/154 dead transitions. [2022-07-21 08:32:52,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 154 transitions, 632 flow [2022-07-21 08:32:52,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:32:52,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:32:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1046 transitions. [2022-07-21 08:32:52,398 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7164383561643836 [2022-07-21 08:32:52,398 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1046 transitions. [2022-07-21 08:32:52,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1046 transitions. [2022-07-21 08:32:52,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:52,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1046 transitions. [2022-07-21 08:32:52,400 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) [2022-07-21 08:32:52,402 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) [2022-07-21 08:32:52,402 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) [2022-07-21 08:32:52,402 INFO L186 Difference]: Start difference. First operand has 147 places, 133 transitions, 434 flow. Second operand 10 states and 1046 transitions. [2022-07-21 08:32:52,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 154 transitions, 632 flow [2022-07-21 08:32:52,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 154 transitions, 622 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:32:52,427 INFO L242 Difference]: Finished difference. Result has 156 places, 140 transitions, 507 flow [2022-07-21 08:32:52,427 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} [2022-07-21 08:32:52,428 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 17 predicate places. [2022-07-21 08:32:52,428 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 140 transitions, 507 flow [2022-07-21 08:32:52,429 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) [2022-07-21 08:32:52,429 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:52,429 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] [2022-07-21 08:32:52,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 08:32:52,643 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 [2022-07-21 08:32:52,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1772614602, now seen corresponding path program 1 times [2022-07-21 08:32:52,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:52,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004059376] [2022-07-21 08:32:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:52,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-21 08:32:52,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:52,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004059376] [2022-07-21 08:32:52,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004059376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:32:52,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463233961] [2022-07-21 08:32:52,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:52,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:32:52,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:32:52,712 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) [2022-07-21 08:32:52,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 08:32:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:52,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 08:32:52,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:32:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:53,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:32:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:32:53,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463233961] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:32:53,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:32:53,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-07-21 08:32:53,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422508258] [2022-07-21 08:32:53,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:32:53,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 08:32:53,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:53,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 08:32:53,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-07-21 08:32:53,276 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 146 [2022-07-21 08:32:53,283 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) [2022-07-21 08:32:53,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:53,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 146 [2022-07-21 08:32:53,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:54,807 INFO L129 PetriNetUnfolder]: 1058/9144 cut-off events. [2022-07-21 08:32:54,808 INFO L130 PetriNetUnfolder]: For 5596/5596 co-relation queries the response was YES. [2022-07-21 08:32:54,836 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. [2022-07-21 08:32:54,855 INFO L132 encePairwiseOnDemand]: 131/146 looper letters, 67 selfloop transitions, 32 changer transitions 0/187 dead transitions. [2022-07-21 08:32:54,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 187 transitions, 917 flow [2022-07-21 08:32:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 08:32:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-21 08:32:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2431 transitions. [2022-07-21 08:32:54,858 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6937785388127854 [2022-07-21 08:32:54,858 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2431 transitions. [2022-07-21 08:32:54,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2431 transitions. [2022-07-21 08:32:54,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:54,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2431 transitions. [2022-07-21 08:32:54,862 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) [2022-07-21 08:32:54,865 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) [2022-07-21 08:32:54,866 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) [2022-07-21 08:32:54,866 INFO L186 Difference]: Start difference. First operand has 156 places, 140 transitions, 507 flow. Second operand 24 states and 2431 transitions. [2022-07-21 08:32:54,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 187 transitions, 917 flow [2022-07-21 08:32:54,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 187 transitions, 896 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-07-21 08:32:54,900 INFO L242 Difference]: Finished difference. Result has 185 places, 157 transitions, 695 flow [2022-07-21 08:32:54,900 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} [2022-07-21 08:32:54,901 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 46 predicate places. [2022-07-21 08:32:54,901 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 157 transitions, 695 flow [2022-07-21 08:32:54,902 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) [2022-07-21 08:32:54,902 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:54,902 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] [2022-07-21 08:32:54,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 08:32:55,127 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 [2022-07-21 08:32:55,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:55,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:55,128 INFO L85 PathProgramCache]: Analyzing trace with hash 734599071, now seen corresponding path program 1 times [2022-07-21 08:32:55,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:55,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77458239] [2022-07-21 08:32:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:55,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:55,175 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:32:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:32:55,229 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:32:55,229 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:32:55,229 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:32:55,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:32:55,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-21 08:32:55,230 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:32:55,232 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:32:55,232 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-21 08:32:55,252 INFO L135 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-07-21 08:32:55,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 152 transitions, 448 flow [2022-07-21 08:32:57,599 INFO L129 PetriNetUnfolder]: 3862/21496 cut-off events. [2022-07-21 08:32:57,599 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-07-21 08:32:57,700 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. [2022-07-21 08:32:57,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 152 transitions, 448 flow [2022-07-21 08:32:57,738 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 142 transitions, 428 flow [2022-07-21 08:32:57,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:32:57,739 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@4f9d16d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b475044 [2022-07-21 08:32:57,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:32:57,743 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-21 08:32:57,743 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:32:57,743 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:57,743 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] [2022-07-21 08:32:57,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:57,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1615772973, now seen corresponding path program 1 times [2022-07-21 08:32:57,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:57,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739802784] [2022-07-21 08:32:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:57,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:57,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739802784] [2022-07-21 08:32:57,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739802784] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:57,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:57,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:32:57,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608743885] [2022-07-21 08:32:57,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:57,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:32:57,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:57,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:32:57,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:32:57,761 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 152 [2022-07-21 08:32:57,762 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) [2022-07-21 08:32:57,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:57,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 152 [2022-07-21 08:32:57,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:32:59,333 INFO L129 PetriNetUnfolder]: 2314/15340 cut-off events. [2022-07-21 08:32:59,333 INFO L130 PetriNetUnfolder]: For 7113/7113 co-relation queries the response was YES. [2022-07-21 08:32:59,379 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. [2022-07-21 08:32:59,404 INFO L132 encePairwiseOnDemand]: 147/152 looper letters, 18 selfloop transitions, 0 changer transitions 2/137 dead transitions. [2022-07-21 08:32:59,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 137 transitions, 454 flow [2022-07-21 08:32:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:32:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:32:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 277 transitions. [2022-07-21 08:32:59,405 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9111842105263158 [2022-07-21 08:32:59,405 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 277 transitions. [2022-07-21 08:32:59,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 277 transitions. [2022-07-21 08:32:59,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:32:59,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 277 transitions. [2022-07-21 08:32:59,406 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) [2022-07-21 08:32:59,406 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) [2022-07-21 08:32:59,406 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) [2022-07-21 08:32:59,406 INFO L186 Difference]: Start difference. First operand has 146 places, 142 transitions, 428 flow. Second operand 2 states and 277 transitions. [2022-07-21 08:32:59,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 137 transitions, 454 flow [2022-07-21 08:32:59,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 137 transitions, 454 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:32:59,411 INFO L242 Difference]: Finished difference. Result has 147 places, 135 transitions, 414 flow [2022-07-21 08:32:59,411 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} [2022-07-21 08:32:59,411 INFO L279 CegarLoopForPetriNet]: 146 programPoint places, 1 predicate places. [2022-07-21 08:32:59,411 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 135 transitions, 414 flow [2022-07-21 08:32:59,412 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) [2022-07-21 08:32:59,412 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:32:59,412 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] [2022-07-21 08:32:59,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-21 08:32:59,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:32:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:32:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash -728269292, now seen corresponding path program 1 times [2022-07-21 08:32:59,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:32:59,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037338912] [2022-07-21 08:32:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:32:59,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:32:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:32:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:32:59,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:32:59,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037338912] [2022-07-21 08:32:59,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037338912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:32:59,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:32:59,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:32:59,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41503657] [2022-07-21 08:32:59,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:32:59,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:32:59,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:32:59,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:32:59,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:32:59,451 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 152 [2022-07-21 08:32:59,452 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) [2022-07-21 08:32:59,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:32:59,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 152 [2022-07-21 08:32:59,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:01,265 INFO L129 PetriNetUnfolder]: 2340/15523 cut-off events. [2022-07-21 08:33:01,265 INFO L130 PetriNetUnfolder]: For 2496/2496 co-relation queries the response was YES. [2022-07-21 08:33:01,307 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. [2022-07-21 08:33:01,334 INFO L132 encePairwiseOnDemand]: 145/152 looper letters, 54 selfloop transitions, 5 changer transitions 0/152 dead transitions. [2022-07-21 08:33:01,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 152 transitions, 593 flow [2022-07-21 08:33:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:33:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:33:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 473 transitions. [2022-07-21 08:33:01,335 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7779605263157895 [2022-07-21 08:33:01,335 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 473 transitions. [2022-07-21 08:33:01,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 473 transitions. [2022-07-21 08:33:01,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:01,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 473 transitions. [2022-07-21 08:33:01,336 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) [2022-07-21 08:33:01,337 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) [2022-07-21 08:33:01,337 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) [2022-07-21 08:33:01,338 INFO L186 Difference]: Start difference. First operand has 147 places, 135 transitions, 414 flow. Second operand 4 states and 473 transitions. [2022-07-21 08:33:01,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 152 transitions, 593 flow [2022-07-21 08:33:01,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 152 transitions, 593 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:33:01,343 INFO L242 Difference]: Finished difference. Result has 149 places, 137 transitions, 440 flow [2022-07-21 08:33:01,343 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} [2022-07-21 08:33:01,344 INFO L279 CegarLoopForPetriNet]: 146 programPoint places, 3 predicate places. [2022-07-21 08:33:01,344 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 137 transitions, 440 flow [2022-07-21 08:33:01,344 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) [2022-07-21 08:33:01,344 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:01,344 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] [2022-07-21 08:33:01,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-21 08:33:01,345 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:33:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1969732575, now seen corresponding path program 1 times [2022-07-21 08:33:01,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:01,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662193254] [2022-07-21 08:33:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:01,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:33:01,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:01,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662193254] [2022-07-21 08:33:01,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662193254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:33:01,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:33:01,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:33:01,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90985852] [2022-07-21 08:33:01,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:33:01,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:33:01,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:01,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:33:01,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:33:01,392 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 152 [2022-07-21 08:33:01,392 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) [2022-07-21 08:33:01,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:01,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 152 [2022-07-21 08:33:01,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:03,707 INFO L129 PetriNetUnfolder]: 2340/18589 cut-off events. [2022-07-21 08:33:03,707 INFO L130 PetriNetUnfolder]: For 3020/3020 co-relation queries the response was YES. [2022-07-21 08:33:03,789 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. [2022-07-21 08:33:03,826 INFO L132 encePairwiseOnDemand]: 142/152 looper letters, 58 selfloop transitions, 9 changer transitions 0/157 dead transitions. [2022-07-21 08:33:03,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 157 transitions, 641 flow [2022-07-21 08:33:03,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:33:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:33:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 668 transitions. [2022-07-21 08:33:03,827 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7324561403508771 [2022-07-21 08:33:03,827 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 668 transitions. [2022-07-21 08:33:03,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 668 transitions. [2022-07-21 08:33:03,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:03,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 668 transitions. [2022-07-21 08:33:03,828 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) [2022-07-21 08:33:03,829 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) [2022-07-21 08:33:03,829 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) [2022-07-21 08:33:03,830 INFO L186 Difference]: Start difference. First operand has 149 places, 137 transitions, 440 flow. Second operand 6 states and 668 transitions. [2022-07-21 08:33:03,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 157 transitions, 641 flow [2022-07-21 08:33:03,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 157 transitions, 635 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:33:03,835 INFO L242 Difference]: Finished difference. Result has 154 places, 139 transitions, 470 flow [2022-07-21 08:33:03,835 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} [2022-07-21 08:33:03,835 INFO L279 CegarLoopForPetriNet]: 146 programPoint places, 8 predicate places. [2022-07-21 08:33:03,836 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 139 transitions, 470 flow [2022-07-21 08:33:03,836 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) [2022-07-21 08:33:03,836 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:03,836 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] [2022-07-21 08:33:03,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-21 08:33:03,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:33:03,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1139235218, now seen corresponding path program 1 times [2022-07-21 08:33:03,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:03,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664884178] [2022-07-21 08:33:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:03,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:33:03,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:03,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664884178] [2022-07-21 08:33:03,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664884178] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:33:03,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221921193] [2022-07-21 08:33:03,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:03,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:33:03,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:33:03,894 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) [2022-07-21 08:33:03,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 08:33:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:04,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 08:33:04,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:33:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:33:04,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:33:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:33:04,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221921193] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:33:04,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:33:04,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-21 08:33:04,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834048286] [2022-07-21 08:33:04,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:33:04,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:33:04,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:33:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-21 08:33:04,233 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 152 [2022-07-21 08:33:04,234 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) [2022-07-21 08:33:04,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:04,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 152 [2022-07-21 08:33:04,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:06,872 INFO L129 PetriNetUnfolder]: 2337/18564 cut-off events. [2022-07-21 08:33:06,875 INFO L130 PetriNetUnfolder]: For 4594/4594 co-relation queries the response was YES. [2022-07-21 08:33:06,995 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. [2022-07-21 08:33:07,042 INFO L132 encePairwiseOnDemand]: 140/152 looper letters, 51 selfloop transitions, 17 changer transitions 0/161 dead transitions. [2022-07-21 08:33:07,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 161 transitions, 679 flow [2022-07-21 08:33:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:33:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:33:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1089 transitions. [2022-07-21 08:33:07,045 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7164473684210526 [2022-07-21 08:33:07,045 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1089 transitions. [2022-07-21 08:33:07,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1089 transitions. [2022-07-21 08:33:07,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:07,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1089 transitions. [2022-07-21 08:33:07,047 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) [2022-07-21 08:33:07,049 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) [2022-07-21 08:33:07,049 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) [2022-07-21 08:33:07,049 INFO L186 Difference]: Start difference. First operand has 154 places, 139 transitions, 470 flow. Second operand 10 states and 1089 transitions. [2022-07-21 08:33:07,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 161 transitions, 679 flow [2022-07-21 08:33:07,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 161 transitions, 669 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:33:07,120 INFO L242 Difference]: Finished difference. Result has 163 places, 146 transitions, 543 flow [2022-07-21 08:33:07,121 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} [2022-07-21 08:33:07,121 INFO L279 CegarLoopForPetriNet]: 146 programPoint places, 17 predicate places. [2022-07-21 08:33:07,121 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 146 transitions, 543 flow [2022-07-21 08:33:07,121 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) [2022-07-21 08:33:07,121 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:07,122 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] [2022-07-21 08:33:07,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-21 08:33:07,322 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 [2022-07-21 08:33:07,322 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:33:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:07,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1823789293, now seen corresponding path program 1 times [2022-07-21 08:33:07,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:07,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21231185] [2022-07-21 08:33:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:07,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-21 08:33:07,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:07,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21231185] [2022-07-21 08:33:07,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21231185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:33:07,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188331991] [2022-07-21 08:33:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:07,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:33:07,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:33:07,388 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) [2022-07-21 08:33:07,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 08:33:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:07,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 08:33:07,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:33:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:33:07,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:33:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:33:07,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188331991] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:33:07,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:33:07,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-07-21 08:33:07,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744410273] [2022-07-21 08:33:07,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:33:07,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 08:33:07,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:07,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 08:33:07,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-07-21 08:33:07,952 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 152 [2022-07-21 08:33:07,954 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) [2022-07-21 08:33:07,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:07,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 152 [2022-07-21 08:33:07,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:11,124 INFO L129 PetriNetUnfolder]: 2393/18601 cut-off events. [2022-07-21 08:33:11,124 INFO L130 PetriNetUnfolder]: For 11472/11472 co-relation queries the response was YES. [2022-07-21 08:33:11,208 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. [2022-07-21 08:33:11,250 INFO L132 encePairwiseOnDemand]: 137/152 looper letters, 71 selfloop transitions, 32 changer transitions 0/195 dead transitions. [2022-07-21 08:33:11,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 195 transitions, 971 flow [2022-07-21 08:33:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 08:33:11,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-21 08:33:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2531 transitions. [2022-07-21 08:33:11,254 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6938048245614035 [2022-07-21 08:33:11,254 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2531 transitions. [2022-07-21 08:33:11,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2531 transitions. [2022-07-21 08:33:11,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:11,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2531 transitions. [2022-07-21 08:33:11,258 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) [2022-07-21 08:33:11,261 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) [2022-07-21 08:33:11,262 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) [2022-07-21 08:33:11,262 INFO L186 Difference]: Start difference. First operand has 163 places, 146 transitions, 543 flow. Second operand 24 states and 2531 transitions. [2022-07-21 08:33:11,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 195 transitions, 971 flow [2022-07-21 08:33:11,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 195 transitions, 950 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-07-21 08:33:11,335 INFO L242 Difference]: Finished difference. Result has 192 places, 163 transitions, 731 flow [2022-07-21 08:33:11,335 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} [2022-07-21 08:33:11,336 INFO L279 CegarLoopForPetriNet]: 146 programPoint places, 46 predicate places. [2022-07-21 08:33:11,336 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 163 transitions, 731 flow [2022-07-21 08:33:11,336 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) [2022-07-21 08:33:11,336 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:11,336 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] [2022-07-21 08:33:11,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-21 08:33:11,537 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 [2022-07-21 08:33:11,537 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:33:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash -302615088, now seen corresponding path program 1 times [2022-07-21 08:33:11,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:11,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555841703] [2022-07-21 08:33:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:11,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:33:11,589 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:33:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:33:11,659 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:33:11,660 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:33:11,660 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:33:11,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:33:11,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-21 08:33:11,661 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 08:33:11,661 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:33:11,661 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-21 08:33:11,679 INFO L135 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-07-21 08:33:11,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 162 places, 158 transitions, 486 flow [2022-07-21 08:33:16,382 INFO L129 PetriNetUnfolder]: 8216/43278 cut-off events. [2022-07-21 08:33:16,382 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-07-21 08:33:16,686 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. [2022-07-21 08:33:16,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 158 transitions, 486 flow [2022-07-21 08:33:16,761 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 148 transitions, 466 flow [2022-07-21 08:33:16,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:33:16,761 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@4f9d16d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b475044 [2022-07-21 08:33:16,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:33:16,764 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-21 08:33:16,764 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:33:16,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:16,764 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] [2022-07-21 08:33:16,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:33:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:16,764 INFO L85 PathProgramCache]: Analyzing trace with hash -714453583, now seen corresponding path program 1 times [2022-07-21 08:33:16,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:16,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757021733] [2022-07-21 08:33:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:16,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:16,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757021733] [2022-07-21 08:33:16,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757021733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:33:16,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:33:16,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:33:16,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159877480] [2022-07-21 08:33:16,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:33:16,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:33:16,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:16,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:33:16,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:33:16,782 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 158 [2022-07-21 08:33:16,782 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) [2022-07-21 08:33:16,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:16,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 158 [2022-07-21 08:33:16,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:20,020 INFO L129 PetriNetUnfolder]: 5131/30977 cut-off events. [2022-07-21 08:33:20,020 INFO L130 PetriNetUnfolder]: For 15625/15625 co-relation queries the response was YES. [2022-07-21 08:33:20,275 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. [2022-07-21 08:33:20,348 INFO L132 encePairwiseOnDemand]: 153/158 looper letters, 20 selfloop transitions, 0 changer transitions 2/143 dead transitions. [2022-07-21 08:33:20,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 143 transitions, 496 flow [2022-07-21 08:33:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:33:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:33:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 287 transitions. [2022-07-21 08:33:20,349 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9082278481012658 [2022-07-21 08:33:20,349 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 287 transitions. [2022-07-21 08:33:20,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 287 transitions. [2022-07-21 08:33:20,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:20,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 287 transitions. [2022-07-21 08:33:20,350 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) [2022-07-21 08:33:20,350 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) [2022-07-21 08:33:20,350 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) [2022-07-21 08:33:20,350 INFO L186 Difference]: Start difference. First operand has 153 places, 148 transitions, 466 flow. Second operand 2 states and 287 transitions. [2022-07-21 08:33:20,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 143 transitions, 496 flow [2022-07-21 08:33:20,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 143 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:33:20,355 INFO L242 Difference]: Finished difference. Result has 154 places, 141 transitions, 452 flow [2022-07-21 08:33:20,355 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} [2022-07-21 08:33:20,356 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 1 predicate places. [2022-07-21 08:33:20,356 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 141 transitions, 452 flow [2022-07-21 08:33:20,356 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) [2022-07-21 08:33:20,356 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:20,356 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] [2022-07-21 08:33:20,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-21 08:33:20,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:33:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash 173050098, now seen corresponding path program 1 times [2022-07-21 08:33:20,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:20,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941382430] [2022-07-21 08:33:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:20,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:20,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:20,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941382430] [2022-07-21 08:33:20,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941382430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:33:20,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:33:20,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:33:20,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581984363] [2022-07-21 08:33:20,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:33:20,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:33:20,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:33:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:33:20,391 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 158 [2022-07-21 08:33:20,391 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) [2022-07-21 08:33:20,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:20,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 158 [2022-07-21 08:33:20,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:24,179 INFO L129 PetriNetUnfolder]: 5165/31208 cut-off events. [2022-07-21 08:33:24,180 INFO L130 PetriNetUnfolder]: For 5375/5375 co-relation queries the response was YES. [2022-07-21 08:33:24,462 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. [2022-07-21 08:33:24,549 INFO L132 encePairwiseOnDemand]: 151/158 looper letters, 57 selfloop transitions, 5 changer transitions 0/159 dead transitions. [2022-07-21 08:33:24,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 159 transitions, 642 flow [2022-07-21 08:33:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 08:33:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 08:33:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 492 transitions. [2022-07-21 08:33:24,551 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7784810126582279 [2022-07-21 08:33:24,551 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 492 transitions. [2022-07-21 08:33:24,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 492 transitions. [2022-07-21 08:33:24,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:24,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 492 transitions. [2022-07-21 08:33:24,552 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) [2022-07-21 08:33:24,553 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) [2022-07-21 08:33:24,553 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) [2022-07-21 08:33:24,553 INFO L186 Difference]: Start difference. First operand has 154 places, 141 transitions, 452 flow. Second operand 4 states and 492 transitions. [2022-07-21 08:33:24,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 159 transitions, 642 flow [2022-07-21 08:33:24,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 159 transitions, 642 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:33:24,564 INFO L242 Difference]: Finished difference. Result has 156 places, 143 transitions, 478 flow [2022-07-21 08:33:24,564 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} [2022-07-21 08:33:24,565 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 3 predicate places. [2022-07-21 08:33:24,566 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 143 transitions, 478 flow [2022-07-21 08:33:24,566 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) [2022-07-21 08:33:24,566 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:24,566 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] [2022-07-21 08:33:24,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-21 08:33:24,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:33:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1976180716, now seen corresponding path program 1 times [2022-07-21 08:33:24,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:24,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903432347] [2022-07-21 08:33:24,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:24,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:33:24,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:24,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903432347] [2022-07-21 08:33:24,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903432347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:33:24,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:33:24,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:33:24,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207467963] [2022-07-21 08:33:24,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:33:24,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:33:24,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:24,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:33:24,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:33:24,620 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 158 [2022-07-21 08:33:24,620 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) [2022-07-21 08:33:24,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:24,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 158 [2022-07-21 08:33:24,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:29,839 INFO L129 PetriNetUnfolder]: 5165/37346 cut-off events. [2022-07-21 08:33:29,839 INFO L130 PetriNetUnfolder]: For 6412/6412 co-relation queries the response was YES. [2022-07-21 08:33:30,102 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. [2022-07-21 08:33:30,183 INFO L132 encePairwiseOnDemand]: 148/158 looper letters, 61 selfloop transitions, 9 changer transitions 0/164 dead transitions. [2022-07-21 08:33:30,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 164 transitions, 690 flow [2022-07-21 08:33:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 08:33:30,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 08:33:30,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 695 transitions. [2022-07-21 08:33:30,184 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7331223628691983 [2022-07-21 08:33:30,184 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 695 transitions. [2022-07-21 08:33:30,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 695 transitions. [2022-07-21 08:33:30,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:30,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 695 transitions. [2022-07-21 08:33:30,185 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) [2022-07-21 08:33:30,186 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) [2022-07-21 08:33:30,186 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) [2022-07-21 08:33:30,186 INFO L186 Difference]: Start difference. First operand has 156 places, 143 transitions, 478 flow. Second operand 6 states and 695 transitions. [2022-07-21 08:33:30,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 164 transitions, 690 flow [2022-07-21 08:33:30,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 164 transitions, 684 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:33:30,192 INFO L242 Difference]: Finished difference. Result has 161 places, 145 transitions, 508 flow [2022-07-21 08:33:30,192 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} [2022-07-21 08:33:30,193 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 8 predicate places. [2022-07-21 08:33:30,193 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 145 transitions, 508 flow [2022-07-21 08:33:30,193 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) [2022-07-21 08:33:30,193 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:30,194 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] [2022-07-21 08:33:30,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-21 08:33:30,194 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:33:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:30,194 INFO L85 PathProgramCache]: Analyzing trace with hash 672067995, now seen corresponding path program 1 times [2022-07-21 08:33:30,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:30,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416926685] [2022-07-21 08:33:30,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:30,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:33:30,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:30,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416926685] [2022-07-21 08:33:30,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416926685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:33:30,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002682300] [2022-07-21 08:33:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:30,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:33:30,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:33:30,248 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) [2022-07-21 08:33:30,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 08:33:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:30,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 08:33:30,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:33:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:33:30,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:33:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:33:30,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002682300] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:33:30,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:33:30,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-21 08:33:30,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188216376] [2022-07-21 08:33:30,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:33:30,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 08:33:30,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 08:33:30,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-21 08:33:30,604 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 158 [2022-07-21 08:33:30,605 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) [2022-07-21 08:33:30,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:30,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 158 [2022-07-21 08:33:30,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:36,115 INFO L129 PetriNetUnfolder]: 5162/37321 cut-off events. [2022-07-21 08:33:36,116 INFO L130 PetriNetUnfolder]: For 9532/9532 co-relation queries the response was YES. [2022-07-21 08:33:36,546 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. [2022-07-21 08:33:36,645 INFO L132 encePairwiseOnDemand]: 146/158 looper letters, 54 selfloop transitions, 17 changer transitions 0/168 dead transitions. [2022-07-21 08:33:36,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 168 transitions, 728 flow [2022-07-21 08:33:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:33:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:33:36,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1132 transitions. [2022-07-21 08:33:36,646 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7164556962025317 [2022-07-21 08:33:36,646 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1132 transitions. [2022-07-21 08:33:36,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1132 transitions. [2022-07-21 08:33:36,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:36,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1132 transitions. [2022-07-21 08:33:36,648 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) [2022-07-21 08:33:36,650 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) [2022-07-21 08:33:36,650 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) [2022-07-21 08:33:36,650 INFO L186 Difference]: Start difference. First operand has 161 places, 145 transitions, 508 flow. Second operand 10 states and 1132 transitions. [2022-07-21 08:33:36,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 168 transitions, 728 flow [2022-07-21 08:33:37,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 168 transitions, 718 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:33:37,377 INFO L242 Difference]: Finished difference. Result has 170 places, 152 transitions, 581 flow [2022-07-21 08:33:37,377 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} [2022-07-21 08:33:37,378 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 17 predicate places. [2022-07-21 08:33:37,378 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 152 transitions, 581 flow [2022-07-21 08:33:37,378 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) [2022-07-21 08:33:37,378 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:37,378 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] [2022-07-21 08:33:37,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 08:33:37,579 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 [2022-07-21 08:33:37,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:33:37,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:37,579 INFO L85 PathProgramCache]: Analyzing trace with hash -54614692, now seen corresponding path program 1 times [2022-07-21 08:33:37,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:37,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759758626] [2022-07-21 08:33:37,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:37,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-21 08:33:37,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:37,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759758626] [2022-07-21 08:33:37,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759758626] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:33:37,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74007937] [2022-07-21 08:33:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:37,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:33:37,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:33:37,944 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) [2022-07-21 08:33:37,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 08:33:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:38,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 08:33:38,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:33:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:33:38,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:33:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 08:33:38,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74007937] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:33:38,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:33:38,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-07-21 08:33:38,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593012423] [2022-07-21 08:33:38,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:33:38,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 08:33:38,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:38,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 08:33:38,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-07-21 08:33:38,427 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 158 [2022-07-21 08:33:38,428 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) [2022-07-21 08:33:38,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:38,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 158 [2022-07-21 08:33:38,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:44,361 INFO L129 PetriNetUnfolder]: 5280/37587 cut-off events. [2022-07-21 08:33:44,362 INFO L130 PetriNetUnfolder]: For 23294/23294 co-relation queries the response was YES. [2022-07-21 08:33:44,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87759 conditions, 37587 events. 5280/37587 cut-off events. For 23294/23294 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 514349 event pairs, 1332 based on Foata normal form. 38/37625 useless extension candidates. Maximal degree in co-relation 87739. Up to 14111 conditions per place. [2022-07-21 08:33:44,739 INFO L132 encePairwiseOnDemand]: 143/158 looper letters, 75 selfloop transitions, 32 changer transitions 0/203 dead transitions. [2022-07-21 08:33:44,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 203 transitions, 1027 flow [2022-07-21 08:33:44,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 08:33:44,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-21 08:33:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2631 transitions. [2022-07-21 08:33:44,742 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6938291139240507 [2022-07-21 08:33:44,742 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2631 transitions. [2022-07-21 08:33:44,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2631 transitions. [2022-07-21 08:33:44,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:44,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2631 transitions. [2022-07-21 08:33:44,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 109.625) internal successors, (2631), 24 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:33:44,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 158.0) internal successors, (3950), 25 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:33:44,749 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 158.0) internal successors, (3950), 25 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:33:44,749 INFO L186 Difference]: Start difference. First operand has 170 places, 152 transitions, 581 flow. Second operand 24 states and 2631 transitions. [2022-07-21 08:33:44,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 203 transitions, 1027 flow [2022-07-21 08:33:45,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 203 transitions, 1006 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-07-21 08:33:45,028 INFO L242 Difference]: Finished difference. Result has 199 places, 169 transitions, 769 flow [2022-07-21 08:33:45,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=769, PETRI_PLACES=199, PETRI_TRANSITIONS=169} [2022-07-21 08:33:45,029 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 46 predicate places. [2022-07-21 08:33:45,029 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 169 transitions, 769 flow [2022-07-21 08:33:45,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-07-21 08:33:45,030 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:45,030 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:33:45,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 08:33:45,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:33:45,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:33:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:45,231 INFO L85 PathProgramCache]: Analyzing trace with hash 295137116, now seen corresponding path program 1 times [2022-07-21 08:33:45,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:45,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090683421] [2022-07-21 08:33:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:45,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-07-21 08:33:45,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:45,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090683421] [2022-07-21 08:33:45,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090683421] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:33:45,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829719496] [2022-07-21 08:33:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:45,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:33:45,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:33:45,337 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:33:45,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 08:33:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:45,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 08:33:45,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:33:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 08:33:46,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:33:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 08:33:46,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829719496] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:33:46,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:33:46,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18, 18] total 38 [2022-07-21 08:33:46,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772217716] [2022-07-21 08:33:46,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:33:46,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 08:33:46,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:46,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 08:33:46,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 08:33:46,356 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 158 [2022-07-21 08:33:46,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 169 transitions, 769 flow. Second operand has 38 states, 38 states have (on average 105.92105263157895) internal successors, (4025), 38 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:33:46,359 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:46,360 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 158 [2022-07-21 08:33:46,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:33:46,831 INFO L129 PetriNetUnfolder]: 0/238 cut-off events. [2022-07-21 08:33:46,831 INFO L130 PetriNetUnfolder]: For 358/358 co-relation queries the response was YES. [2022-07-21 08:33:46,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 238 events. 0/238 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 80 event pairs, 0 based on Foata normal form. 4/242 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-21 08:33:46,832 INFO L132 encePairwiseOnDemand]: 152/158 looper letters, 37 selfloop transitions, 32 changer transitions 0/151 dead transitions. [2022-07-21 08:33:46,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 151 transitions, 817 flow [2022-07-21 08:33:46,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 08:33:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 08:33:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3541 transitions. [2022-07-21 08:33:46,835 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6591586001489204 [2022-07-21 08:33:46,835 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3541 transitions. [2022-07-21 08:33:46,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3541 transitions. [2022-07-21 08:33:46,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:33:46,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3541 transitions. [2022-07-21 08:33:46,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 104.1470588235294) internal successors, (3541), 34 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:33:46,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 158.0) internal successors, (5530), 35 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:33:46,843 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 158.0) internal successors, (5530), 35 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:33:46,843 INFO L186 Difference]: Start difference. First operand has 199 places, 169 transitions, 769 flow. Second operand 34 states and 3541 transitions. [2022-07-21 08:33:46,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 151 transitions, 817 flow [2022-07-21 08:33:46,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 151 transitions, 652 flow, removed 54 selfloop flow, removed 18 redundant places. [2022-07-21 08:33:46,847 INFO L242 Difference]: Finished difference. Result has 185 places, 133 transitions, 505 flow [2022-07-21 08:33:46,847 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=505, PETRI_PLACES=185, PETRI_TRANSITIONS=133} [2022-07-21 08:33:46,847 INFO L279 CegarLoopForPetriNet]: 153 programPoint places, 32 predicate places. [2022-07-21 08:33:46,847 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 133 transitions, 505 flow [2022-07-21 08:33:46,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 105.92105263157895) internal successors, (4025), 38 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:33:46,848 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:46,849 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:33:46,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 08:33:47,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:33:47,052 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:33:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:47,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1945166246, now seen corresponding path program 1 times [2022-07-21 08:33:47,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:47,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467103549] [2022-07-21 08:33:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:47,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:33:47,234 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:33:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:33:47,289 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:33:47,289 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:33:47,290 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-21 08:33:47,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 08:33:47,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-21 08:33:47,290 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:33:47,291 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:33:47,291 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-21 08:33:47,307 INFO L135 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2022-07-21 08:33:47,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 164 transitions, 526 flow [2022-07-21 08:33:58,043 INFO L129 PetriNetUnfolder]: 17434/87332 cut-off events. [2022-07-21 08:33:58,043 INFO L130 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2022-07-21 08:33:58,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98696 conditions, 87332 events. 17434/87332 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1381. Compared 1227704 event pairs, 7181 based on Foata normal form. 0/75018 useless extension candidates. Maximal degree in co-relation 48462. Up to 11264 conditions per place. [2022-07-21 08:33:58,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 164 transitions, 526 flow [2022-07-21 08:33:58,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 154 transitions, 506 flow [2022-07-21 08:33:58,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:33:58,869 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@4f9d16d0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b475044 [2022-07-21 08:33:58,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:33:58,872 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2022-07-21 08:33:58,872 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:33:58,872 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:33:58,872 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] [2022-07-21 08:33:58,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:33:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:33:58,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1267124055, now seen corresponding path program 1 times [2022-07-21 08:33:58,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:33:58,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435024302] [2022-07-21 08:33:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:33:58,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:33:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:33:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:33:58,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:33:58,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435024302] [2022-07-21 08:33:58,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435024302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:33:58,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:33:58,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:33:58,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012127681] [2022-07-21 08:33:58,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:33:58,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:33:58,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:33:58,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:33:58,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:33:58,891 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 164 [2022-07-21 08:33:58,891 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 154 transitions, 506 flow. Second operand has 2 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:33:58,891 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:33:58,891 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 164 [2022-07-21 08:33:58,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand