./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/fibonacci.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/fibonacci.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:27:46,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:27:46,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:27:46,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:27:46,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:27:46,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:27:46,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:27:46,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:27:46,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:27:46,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:27:46,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:27:46,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:27:46,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:27:46,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:27:46,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:27:46,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:27:46,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:27:46,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:27:46,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:27:46,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:27:46,398 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:27:46,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:27:46,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:27:46,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:27:46,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:27:46,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:27:46,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:27:46,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:27:46,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:27:46,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:27:46,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:27:46,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:27:46,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:27:46,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:27:46,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:27:46,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:27:46,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:27:46,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:27:46,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:27:46,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:27:46,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:27:46,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:27:46,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:27:46,464 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:27:46,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:27:46,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:27:46,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:27:46,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:27:46,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:27:46,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:27:46,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:27:46,467 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:27:46,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:27:46,467 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:27:46,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:27:46,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:27:46,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:27:46,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:27:46,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:27:46,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:27:46,468 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:27:46,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:27:46,470 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:27:46,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:27:46,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:27:46,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:27:46,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:27:46,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:27:46,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:27:46,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:27:46,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:27:46,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:27:46,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:27:46,472 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:27:46,473 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:27:46,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:27:46,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e [2022-07-19 21:27:46,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:27:46,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:27:46,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:27:46,751 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:27:46,751 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:27:46,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-07-19 21:27:46,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/317db5792/488657b60d9b4040a484d8abd676d7fe/FLAG4483f3f9a [2022-07-19 21:27:47,230 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:27:47,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/fibonacci.wvr.c [2022-07-19 21:27:47,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/317db5792/488657b60d9b4040a484d8abd676d7fe/FLAG4483f3f9a [2022-07-19 21:27:47,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/317db5792/488657b60d9b4040a484d8abd676d7fe [2022-07-19 21:27:47,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:27:47,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:27:47,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:27:47,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:27:47,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:27:47,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:27:47" (1/1) ... [2022-07-19 21:27:47,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fd646b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:47, skipping insertion in model container [2022-07-19 21:27:47,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:27:47" (1/1) ... [2022-07-19 21:27:47,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:27:47,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:27:47,431 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2022-07-19 21:27:47,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:27:47,444 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:27:47,479 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/fibonacci.wvr.c[2330,2343] [2022-07-19 21:27:47,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:27:47,505 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:27:47,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:47 WrapperNode [2022-07-19 21:27:47,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:27:47,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:27:47,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:27:47,507 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:27:47,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:47" (1/1) ... [2022-07-19 21:27:47,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:47" (1/1) ... [2022-07-19 21:27:47,562 INFO L137 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 170 [2022-07-19 21:27:47,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:27:47,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:27:47,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:27:47,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:27:47,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:47" (1/1) ... [2022-07-19 21:27:47,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:47" (1/1) ... [2022-07-19 21:27:47,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:47" (1/1) ... [2022-07-19 21:27:47,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:47" (1/1) ... [2022-07-19 21:27:47,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:47" (1/1) ... [2022-07-19 21:27:47,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:47" (1/1) ... [2022-07-19 21:27:47,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:47" (1/1) ... [2022-07-19 21:27:47,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:27:47,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:27:47,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:27:47,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:27:47,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:47" (1/1) ... [2022-07-19 21:27:47,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:27:47,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:27:47,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:27:47,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:27:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:27:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:27:47,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:27:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:27:47,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:27:47,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:27:47,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:27:47,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:27:47,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:27:47,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:27:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:27:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:27:47,658 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:27:47,728 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:27:47,730 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:27:48,031 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:27:48,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:27:48,043 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:27:48,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:27:48 BoogieIcfgContainer [2022-07-19 21:27:48,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:27:48,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:27:48,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:27:48,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:27:48,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:27:47" (1/3) ... [2022-07-19 21:27:48,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3846090e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:27:48, skipping insertion in model container [2022-07-19 21:27:48,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:27:47" (2/3) ... [2022-07-19 21:27:48,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3846090e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:27:48, skipping insertion in model container [2022-07-19 21:27:48,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:27:48" (3/3) ... [2022-07-19 21:27:48,053 INFO L111 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2022-07-19 21:27:48,059 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:27:48,068 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:27:48,068 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:27:48,069 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:27:48,173 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:27:48,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 221 places, 230 transitions, 476 flow [2022-07-19 21:27:48,290 INFO L129 PetriNetUnfolder]: 16/228 cut-off events. [2022-07-19 21:27:48,291 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:27:48,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 228 events. 16/228 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 382 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2022-07-19 21:27:48,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 230 transitions, 476 flow [2022-07-19 21:27:48,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 219 transitions, 450 flow [2022-07-19 21:27:48,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:27:48,330 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@3873f72d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3dc7f2a4 [2022-07-19 21:27:48,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:27:48,380 INFO L129 PetriNetUnfolder]: 11/174 cut-off events. [2022-07-19 21:27:48,381 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:27:48,381 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:48,382 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:48,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:48,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:48,389 INFO L85 PathProgramCache]: Analyzing trace with hash 926680244, now seen corresponding path program 1 times [2022-07-19 21:27:48,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:48,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773234880] [2022-07-19 21:27:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:48,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:48,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:48,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773234880] [2022-07-19 21:27:48,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773234880] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:48,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:48,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:27:48,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676788829] [2022-07-19 21:27:48,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:48,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:27:48,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:48,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:27:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:27:48,654 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 230 [2022-07-19 21:27:48,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 219 transitions, 450 flow. Second operand has 2 states, 2 states have (on average 216.0) internal successors, (432), 2 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:48,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:48,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 230 [2022-07-19 21:27:48,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:48,745 INFO L129 PetriNetUnfolder]: 4/207 cut-off events. [2022-07-19 21:27:48,745 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:27:48,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 207 events. 4/207 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 331 event pairs, 0 based on Foata normal form. 14/207 useless extension candidates. Maximal degree in co-relation 144. Up to 5 conditions per place. [2022-07-19 21:27:48,752 INFO L132 encePairwiseOnDemand]: 218/230 looper letters, 4 selfloop transitions, 0 changer transitions 2/207 dead transitions. [2022-07-19 21:27:48,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 207 transitions, 434 flow [2022-07-19 21:27:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:27:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:27:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 442 transitions. [2022-07-19 21:27:48,767 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9608695652173913 [2022-07-19 21:27:48,768 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 442 transitions. [2022-07-19 21:27:48,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 442 transitions. [2022-07-19 21:27:48,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:48,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 442 transitions. [2022-07-19 21:27:48,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 221.0) internal successors, (442), 2 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:48,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:48,784 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:48,786 INFO L186 Difference]: Start difference. First operand has 210 places, 219 transitions, 450 flow. Second operand 2 states and 442 transitions. [2022-07-19 21:27:48,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 207 transitions, 434 flow [2022-07-19 21:27:48,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 207 transitions, 426 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:27:48,794 INFO L242 Difference]: Finished difference. Result has 207 places, 205 transitions, 414 flow [2022-07-19 21:27:48,796 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=414, PETRI_PLACES=207, PETRI_TRANSITIONS=205} [2022-07-19 21:27:48,800 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, -3 predicate places. [2022-07-19 21:27:48,800 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 205 transitions, 414 flow [2022-07-19 21:27:48,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 216.0) internal successors, (432), 2 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:48,801 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:48,801 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:48,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:27:48,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:48,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash -584350222, now seen corresponding path program 1 times [2022-07-19 21:27:48,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:48,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470993785] [2022-07-19 21:27:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:48,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:48,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:48,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470993785] [2022-07-19 21:27:48,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470993785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:48,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:48,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:27:48,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368056885] [2022-07-19 21:27:48,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:48,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:27:48,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:27:48,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:27:48,985 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-19 21:27:48,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 205 transitions, 414 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:48,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:48,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-19 21:27:48,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:49,239 INFO L129 PetriNetUnfolder]: 44/341 cut-off events. [2022-07-19 21:27:49,244 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-19 21:27:49,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 341 events. 44/341 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1267 event pairs, 15 based on Foata normal form. 1/328 useless extension candidates. Maximal degree in co-relation 465. Up to 58 conditions per place. [2022-07-19 21:27:49,248 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 42 selfloop transitions, 3 changer transitions 16/242 dead transitions. [2022-07-19 21:27:49,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 242 transitions, 619 flow [2022-07-19 21:27:49,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:27:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:27:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2545 transitions. [2022-07-19 21:27:49,257 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8511705685618729 [2022-07-19 21:27:49,258 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2545 transitions. [2022-07-19 21:27:49,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2545 transitions. [2022-07-19 21:27:49,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:49,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2545 transitions. [2022-07-19 21:27:49,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 195.76923076923077) internal successors, (2545), 13 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:49,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:49,278 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:49,278 INFO L186 Difference]: Start difference. First operand has 207 places, 205 transitions, 414 flow. Second operand 13 states and 2545 transitions. [2022-07-19 21:27:49,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 242 transitions, 619 flow [2022-07-19 21:27:49,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 242 transitions, 619 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:27:49,292 INFO L242 Difference]: Finished difference. Result has 228 places, 207 transitions, 457 flow [2022-07-19 21:27:49,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=457, PETRI_PLACES=228, PETRI_TRANSITIONS=207} [2022-07-19 21:27:49,293 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 18 predicate places. [2022-07-19 21:27:49,294 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 207 transitions, 457 flow [2022-07-19 21:27:49,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:49,295 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:49,295 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:49,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:27:49,296 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:49,296 INFO L85 PathProgramCache]: Analyzing trace with hash -16394332, now seen corresponding path program 2 times [2022-07-19 21:27:49,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:49,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222122487] [2022-07-19 21:27:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:49,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:49,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:49,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222122487] [2022-07-19 21:27:49,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222122487] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:49,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:49,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:27:49,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908383571] [2022-07-19 21:27:49,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:49,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:27:49,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:49,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:27:49,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:27:49,442 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-19 21:27:49,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 207 transitions, 457 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:49,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:49,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-19 21:27:49,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:49,673 INFO L129 PetriNetUnfolder]: 55/420 cut-off events. [2022-07-19 21:27:49,674 INFO L130 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2022-07-19 21:27:49,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 420 events. 55/420 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1929 event pairs, 30 based on Foata normal form. 1/405 useless extension candidates. Maximal degree in co-relation 785. Up to 92 conditions per place. [2022-07-19 21:27:49,678 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 49 selfloop transitions, 3 changer transitions 15/248 dead transitions. [2022-07-19 21:27:49,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 248 transitions, 789 flow [2022-07-19 21:27:49,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:27:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:27:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2543 transitions. [2022-07-19 21:27:49,684 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8505016722408026 [2022-07-19 21:27:49,684 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2543 transitions. [2022-07-19 21:27:49,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2543 transitions. [2022-07-19 21:27:49,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:49,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2543 transitions. [2022-07-19 21:27:49,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 195.6153846153846) internal successors, (2543), 13 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:49,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:49,699 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:49,699 INFO L186 Difference]: Start difference. First operand has 228 places, 207 transitions, 457 flow. Second operand 13 states and 2543 transitions. [2022-07-19 21:27:49,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 248 transitions, 789 flow [2022-07-19 21:27:49,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 248 transitions, 747 flow, removed 19 selfloop flow, removed 7 redundant places. [2022-07-19 21:27:49,708 INFO L242 Difference]: Finished difference. Result has 236 places, 209 transitions, 491 flow [2022-07-19 21:27:49,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=491, PETRI_PLACES=236, PETRI_TRANSITIONS=209} [2022-07-19 21:27:49,710 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 26 predicate places. [2022-07-19 21:27:49,711 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 209 transitions, 491 flow [2022-07-19 21:27:49,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:49,712 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:49,712 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:49,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:27:49,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:49,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1238953426, now seen corresponding path program 1 times [2022-07-19 21:27:49,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:49,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859220858] [2022-07-19 21:27:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:49,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:49,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:49,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859220858] [2022-07-19 21:27:49,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859220858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:49,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:49,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:27:49,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013302609] [2022-07-19 21:27:49,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:49,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:27:49,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:49,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:27:49,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:27:49,849 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 230 [2022-07-19 21:27:49,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 209 transitions, 491 flow. Second operand has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:49,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:49,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 230 [2022-07-19 21:27:49,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:50,086 INFO L129 PetriNetUnfolder]: 122/1239 cut-off events. [2022-07-19 21:27:50,086 INFO L130 PetriNetUnfolder]: For 409/427 co-relation queries the response was YES. [2022-07-19 21:27:50,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 1239 events. 122/1239 cut-off events. For 409/427 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 8010 event pairs, 31 based on Foata normal form. 7/1117 useless extension candidates. Maximal degree in co-relation 1842. Up to 116 conditions per place. [2022-07-19 21:27:50,097 INFO L132 encePairwiseOnDemand]: 218/230 looper letters, 53 selfloop transitions, 14 changer transitions 0/250 dead transitions. [2022-07-19 21:27:50,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 250 transitions, 734 flow [2022-07-19 21:27:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:27:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:27:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1391 transitions. [2022-07-19 21:27:50,101 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8639751552795031 [2022-07-19 21:27:50,101 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1391 transitions. [2022-07-19 21:27:50,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1391 transitions. [2022-07-19 21:27:50,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:50,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1391 transitions. [2022-07-19 21:27:50,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.71428571428572) internal successors, (1391), 7 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:50,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:50,109 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:50,111 INFO L186 Difference]: Start difference. First operand has 236 places, 209 transitions, 491 flow. Second operand 7 states and 1391 transitions. [2022-07-19 21:27:50,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 250 transitions, 734 flow [2022-07-19 21:27:50,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 250 transitions, 703 flow, removed 15 selfloop flow, removed 7 redundant places. [2022-07-19 21:27:50,122 INFO L242 Difference]: Finished difference. Result has 230 places, 217 transitions, 553 flow [2022-07-19 21:27:50,122 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=553, PETRI_PLACES=230, PETRI_TRANSITIONS=217} [2022-07-19 21:27:50,124 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 20 predicate places. [2022-07-19 21:27:50,124 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 217 transitions, 553 flow [2022-07-19 21:27:50,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:50,127 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:50,128 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:50,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:27:50,128 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1406417816, now seen corresponding path program 3 times [2022-07-19 21:27:50,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:50,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799541816] [2022-07-19 21:27:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:50,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:50,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:50,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799541816] [2022-07-19 21:27:50,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799541816] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:50,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:50,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:27:50,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422890325] [2022-07-19 21:27:50,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:50,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:27:50,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:50,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:27:50,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:27:50,258 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-19 21:27:50,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 217 transitions, 553 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:50,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:50,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-19 21:27:50,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:50,570 INFO L129 PetriNetUnfolder]: 155/1300 cut-off events. [2022-07-19 21:27:50,570 INFO L130 PetriNetUnfolder]: For 910/942 co-relation queries the response was YES. [2022-07-19 21:27:50,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2448 conditions, 1300 events. 155/1300 cut-off events. For 910/942 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 7579 event pairs, 73 based on Foata normal form. 6/1220 useless extension candidates. Maximal degree in co-relation 2431. Up to 277 conditions per place. [2022-07-19 21:27:50,581 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 34 selfloop transitions, 8 changer transitions 12/243 dead transitions. [2022-07-19 21:27:50,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 243 transitions, 820 flow [2022-07-19 21:27:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:27:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:27:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2343 transitions. [2022-07-19 21:27:50,586 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8489130434782609 [2022-07-19 21:27:50,587 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2343 transitions. [2022-07-19 21:27:50,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2343 transitions. [2022-07-19 21:27:50,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:50,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2343 transitions. [2022-07-19 21:27:50,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 195.25) internal successors, (2343), 12 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:50,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:50,599 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:50,600 INFO L186 Difference]: Start difference. First operand has 230 places, 217 transitions, 553 flow. Second operand 12 states and 2343 transitions. [2022-07-19 21:27:50,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 243 transitions, 820 flow [2022-07-19 21:27:50,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 243 transitions, 816 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:27:50,608 INFO L242 Difference]: Finished difference. Result has 246 places, 224 transitions, 652 flow [2022-07-19 21:27:50,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=652, PETRI_PLACES=246, PETRI_TRANSITIONS=224} [2022-07-19 21:27:50,610 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 36 predicate places. [2022-07-19 21:27:50,610 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 224 transitions, 652 flow [2022-07-19 21:27:50,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:50,611 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:50,611 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:50,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:27:50,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:50,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1954405362, now seen corresponding path program 4 times [2022-07-19 21:27:50,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:50,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50904588] [2022-07-19 21:27:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:50,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:50,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:50,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50904588] [2022-07-19 21:27:50,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50904588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:50,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:50,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:27:50,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527359916] [2022-07-19 21:27:50,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:50,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:27:50,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:50,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:27:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:27:50,702 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-19 21:27:50,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 224 transitions, 652 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:50,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:50,704 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-19 21:27:50,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:51,003 INFO L129 PetriNetUnfolder]: 145/1286 cut-off events. [2022-07-19 21:27:51,003 INFO L130 PetriNetUnfolder]: For 1485/1540 co-relation queries the response was YES. [2022-07-19 21:27:51,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2612 conditions, 1286 events. 145/1286 cut-off events. For 1485/1540 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 7565 event pairs, 79 based on Foata normal form. 10/1208 useless extension candidates. Maximal degree in co-relation 2587. Up to 277 conditions per place. [2022-07-19 21:27:51,019 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 32 selfloop transitions, 2 changer transitions 16/239 dead transitions. [2022-07-19 21:27:51,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 239 transitions, 858 flow [2022-07-19 21:27:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:27:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:27:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2148 transitions. [2022-07-19 21:27:51,025 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8490118577075099 [2022-07-19 21:27:51,025 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2148 transitions. [2022-07-19 21:27:51,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2148 transitions. [2022-07-19 21:27:51,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:51,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2148 transitions. [2022-07-19 21:27:51,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.27272727272728) internal successors, (2148), 11 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,039 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,039 INFO L186 Difference]: Start difference. First operand has 246 places, 224 transitions, 652 flow. Second operand 11 states and 2148 transitions. [2022-07-19 21:27:51,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 239 transitions, 858 flow [2022-07-19 21:27:51,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 239 transitions, 832 flow, removed 13 selfloop flow, removed 3 redundant places. [2022-07-19 21:27:51,050 INFO L242 Difference]: Finished difference. Result has 252 places, 218 transitions, 589 flow [2022-07-19 21:27:51,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=589, PETRI_PLACES=252, PETRI_TRANSITIONS=218} [2022-07-19 21:27:51,053 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 42 predicate places. [2022-07-19 21:27:51,053 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 218 transitions, 589 flow [2022-07-19 21:27:51,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,054 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:51,055 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:51,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:27:51,055 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:51,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1105414098, now seen corresponding path program 2 times [2022-07-19 21:27:51,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:51,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488665971] [2022-07-19 21:27:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:51,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:51,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:51,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488665971] [2022-07-19 21:27:51,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488665971] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:51,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:51,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:27:51,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071163256] [2022-07-19 21:27:51,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:51,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:27:51,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:51,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:27:51,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:27:51,179 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 230 [2022-07-19 21:27:51,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 218 transitions, 589 flow. Second operand has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:51,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 230 [2022-07-19 21:27:51,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:51,398 INFO L129 PetriNetUnfolder]: 121/1242 cut-off events. [2022-07-19 21:27:51,398 INFO L130 PetriNetUnfolder]: For 846/873 co-relation queries the response was YES. [2022-07-19 21:27:51,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2114 conditions, 1242 events. 121/1242 cut-off events. For 846/873 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 8036 event pairs, 28 based on Foata normal form. 9/1161 useless extension candidates. Maximal degree in co-relation 2086. Up to 128 conditions per place. [2022-07-19 21:27:51,410 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 57 selfloop transitions, 14 changer transitions 0/255 dead transitions. [2022-07-19 21:27:51,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 255 transitions, 858 flow [2022-07-19 21:27:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:27:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:27:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1390 transitions. [2022-07-19 21:27:51,414 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8633540372670807 [2022-07-19 21:27:51,414 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1390 transitions. [2022-07-19 21:27:51,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1390 transitions. [2022-07-19 21:27:51,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:51,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1390 transitions. [2022-07-19 21:27:51,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.57142857142858) internal successors, (1390), 7 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,440 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,440 INFO L186 Difference]: Start difference. First operand has 252 places, 218 transitions, 589 flow. Second operand 7 states and 1390 transitions. [2022-07-19 21:27:51,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 255 transitions, 858 flow [2022-07-19 21:27:51,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 255 transitions, 820 flow, removed 17 selfloop flow, removed 10 redundant places. [2022-07-19 21:27:51,449 INFO L242 Difference]: Finished difference. Result has 240 places, 224 transitions, 648 flow [2022-07-19 21:27:51,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=648, PETRI_PLACES=240, PETRI_TRANSITIONS=224} [2022-07-19 21:27:51,450 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 30 predicate places. [2022-07-19 21:27:51,450 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 224 transitions, 648 flow [2022-07-19 21:27:51,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,451 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:51,451 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:51,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:27:51,452 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:51,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:51,452 INFO L85 PathProgramCache]: Analyzing trace with hash 815955232, now seen corresponding path program 5 times [2022-07-19 21:27:51,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:51,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205573524] [2022-07-19 21:27:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:51,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:51,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:51,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205573524] [2022-07-19 21:27:51,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205573524] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:51,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:51,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:27:51,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726264051] [2022-07-19 21:27:51,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:51,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:27:51,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:51,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:27:51,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:27:51,519 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-19 21:27:51,533 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 224 transitions, 648 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,533 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:51,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-19 21:27:51,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:51,830 INFO L129 PetriNetUnfolder]: 132/1310 cut-off events. [2022-07-19 21:27:51,831 INFO L130 PetriNetUnfolder]: For 1031/1066 co-relation queries the response was YES. [2022-07-19 21:27:51,837 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2422 conditions, 1310 events. 132/1310 cut-off events. For 1031/1066 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 8081 event pairs, 60 based on Foata normal form. 2/1232 useless extension candidates. Maximal degree in co-relation 2399. Up to 230 conditions per place. [2022-07-19 21:27:51,841 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 32 selfloop transitions, 8 changer transitions 12/247 dead transitions. [2022-07-19 21:27:51,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 247 transitions, 903 flow [2022-07-19 21:27:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:27:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:27:51,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2152 transitions. [2022-07-19 21:27:51,847 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.850592885375494 [2022-07-19 21:27:51,848 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2152 transitions. [2022-07-19 21:27:51,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2152 transitions. [2022-07-19 21:27:51,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:51,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2152 transitions. [2022-07-19 21:27:51,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.63636363636363) internal successors, (2152), 11 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,859 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,860 INFO L186 Difference]: Start difference. First operand has 240 places, 224 transitions, 648 flow. Second operand 11 states and 2152 transitions. [2022-07-19 21:27:51,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 247 transitions, 903 flow [2022-07-19 21:27:51,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 247 transitions, 897 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-07-19 21:27:51,869 INFO L242 Difference]: Finished difference. Result has 256 places, 229 transitions, 737 flow [2022-07-19 21:27:51,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=737, PETRI_PLACES=256, PETRI_TRANSITIONS=229} [2022-07-19 21:27:51,872 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 46 predicate places. [2022-07-19 21:27:51,872 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 229 transitions, 737 flow [2022-07-19 21:27:51,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,873 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:51,873 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:51,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:27:51,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:51,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1297533230, now seen corresponding path program 1 times [2022-07-19 21:27:51,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:51,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90177518] [2022-07-19 21:27:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:51,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:51,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:51,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90177518] [2022-07-19 21:27:51,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90177518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:51,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:51,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:27:51,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405178190] [2022-07-19 21:27:51,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:51,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:27:51,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:51,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:27:51,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:27:51,956 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 230 [2022-07-19 21:27:51,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 229 transitions, 737 flow. Second operand has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:51,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:51,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 230 [2022-07-19 21:27:51,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:52,208 INFO L129 PetriNetUnfolder]: 124/1277 cut-off events. [2022-07-19 21:27:52,209 INFO L130 PetriNetUnfolder]: For 1325/1372 co-relation queries the response was YES. [2022-07-19 21:27:52,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2401 conditions, 1277 events. 124/1277 cut-off events. For 1325/1372 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8431 event pairs, 31 based on Foata normal form. 9/1196 useless extension candidates. Maximal degree in co-relation 2369. Up to 123 conditions per place. [2022-07-19 21:27:52,221 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 59 selfloop transitions, 13 changer transitions 0/261 dead transitions. [2022-07-19 21:27:52,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 261 transitions, 989 flow [2022-07-19 21:27:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:27:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:27:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1390 transitions. [2022-07-19 21:27:52,225 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8633540372670807 [2022-07-19 21:27:52,225 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1390 transitions. [2022-07-19 21:27:52,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1390 transitions. [2022-07-19 21:27:52,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:52,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1390 transitions. [2022-07-19 21:27:52,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.57142857142858) internal successors, (1390), 7 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:52,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:52,232 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:52,233 INFO L186 Difference]: Start difference. First operand has 256 places, 229 transitions, 737 flow. Second operand 7 states and 1390 transitions. [2022-07-19 21:27:52,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 261 transitions, 989 flow [2022-07-19 21:27:52,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 261 transitions, 938 flow, removed 23 selfloop flow, removed 5 redundant places. [2022-07-19 21:27:52,245 INFO L242 Difference]: Finished difference. Result has 255 places, 231 transitions, 761 flow [2022-07-19 21:27:52,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=761, PETRI_PLACES=255, PETRI_TRANSITIONS=231} [2022-07-19 21:27:52,247 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 45 predicate places. [2022-07-19 21:27:52,247 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 231 transitions, 761 flow [2022-07-19 21:27:52,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:52,247 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:52,248 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:52,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:27:52,249 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:52,250 INFO L85 PathProgramCache]: Analyzing trace with hash 344522756, now seen corresponding path program 2 times [2022-07-19 21:27:52,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:52,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643266535] [2022-07-19 21:27:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:52,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:52,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:52,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643266535] [2022-07-19 21:27:52,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643266535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:52,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:52,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:27:52,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484156076] [2022-07-19 21:27:52,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:52,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:27:52,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:52,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:27:52,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:27:52,339 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 230 [2022-07-19 21:27:52,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 231 transitions, 761 flow. Second operand has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:52,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:52,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 230 [2022-07-19 21:27:52,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:52,582 INFO L129 PetriNetUnfolder]: 121/1266 cut-off events. [2022-07-19 21:27:52,583 INFO L130 PetriNetUnfolder]: For 1305/1333 co-relation queries the response was YES. [2022-07-19 21:27:52,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2294 conditions, 1266 events. 121/1266 cut-off events. For 1305/1333 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8347 event pairs, 29 based on Foata normal form. 5/1179 useless extension candidates. Maximal degree in co-relation 2264. Up to 135 conditions per place. [2022-07-19 21:27:52,595 INFO L132 encePairwiseOnDemand]: 219/230 looper letters, 56 selfloop transitions, 16 changer transitions 0/261 dead transitions. [2022-07-19 21:27:52,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 261 transitions, 992 flow [2022-07-19 21:27:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:27:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:27:52,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1389 transitions. [2022-07-19 21:27:52,599 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8627329192546583 [2022-07-19 21:27:52,599 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1389 transitions. [2022-07-19 21:27:52,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1389 transitions. [2022-07-19 21:27:52,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:52,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1389 transitions. [2022-07-19 21:27:52,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.42857142857142) internal successors, (1389), 7 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:52,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:52,606 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:52,606 INFO L186 Difference]: Start difference. First operand has 255 places, 231 transitions, 761 flow. Second operand 7 states and 1389 transitions. [2022-07-19 21:27:52,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 261 transitions, 992 flow [2022-07-19 21:27:52,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 261 transitions, 969 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-07-19 21:27:52,618 INFO L242 Difference]: Finished difference. Result has 259 places, 233 transitions, 813 flow [2022-07-19 21:27:52,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=813, PETRI_PLACES=259, PETRI_TRANSITIONS=233} [2022-07-19 21:27:52,620 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 49 predicate places. [2022-07-19 21:27:52,620 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 233 transitions, 813 flow [2022-07-19 21:27:52,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:52,621 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:52,621 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:52,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:27:52,622 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:52,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:52,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2001444932, now seen corresponding path program 1 times [2022-07-19 21:27:52,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:52,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841414412] [2022-07-19 21:27:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:52,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:52,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:52,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841414412] [2022-07-19 21:27:52,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841414412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:52,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:52,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:27:52,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52857976] [2022-07-19 21:27:52,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:52,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:27:52,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:52,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:27:52,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:27:52,726 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-19 21:27:52,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 233 transitions, 813 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:52,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:52,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-19 21:27:52,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:53,000 INFO L129 PetriNetUnfolder]: 128/1303 cut-off events. [2022-07-19 21:27:53,000 INFO L130 PetriNetUnfolder]: For 1489/1531 co-relation queries the response was YES. [2022-07-19 21:27:53,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2559 conditions, 1303 events. 128/1303 cut-off events. For 1489/1531 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 8216 event pairs, 30 based on Foata normal form. 2/1231 useless extension candidates. Maximal degree in co-relation 2527. Up to 159 conditions per place. [2022-07-19 21:27:53,014 INFO L132 encePairwiseOnDemand]: 218/230 looper letters, 53 selfloop transitions, 6 changer transitions 16/274 dead transitions. [2022-07-19 21:27:53,015 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 274 transitions, 1216 flow [2022-07-19 21:27:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:27:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:27:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2545 transitions. [2022-07-19 21:27:53,022 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8511705685618729 [2022-07-19 21:27:53,022 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2545 transitions. [2022-07-19 21:27:53,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2545 transitions. [2022-07-19 21:27:53,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:53,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2545 transitions. [2022-07-19 21:27:53,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 195.76923076923077) internal successors, (2545), 13 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,037 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,037 INFO L186 Difference]: Start difference. First operand has 259 places, 233 transitions, 813 flow. Second operand 13 states and 2545 transitions. [2022-07-19 21:27:53,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 274 transitions, 1216 flow [2022-07-19 21:27:53,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 274 transitions, 1205 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:27:53,049 INFO L242 Difference]: Finished difference. Result has 277 places, 233 transitions, 839 flow [2022-07-19 21:27:53,049 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=839, PETRI_PLACES=277, PETRI_TRANSITIONS=233} [2022-07-19 21:27:53,050 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 67 predicate places. [2022-07-19 21:27:53,050 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 233 transitions, 839 flow [2022-07-19 21:27:53,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,051 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:53,051 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:53,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:27:53,052 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:53,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1733805134, now seen corresponding path program 2 times [2022-07-19 21:27:53,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:53,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721435392] [2022-07-19 21:27:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:53,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:53,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:53,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721435392] [2022-07-19 21:27:53,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721435392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:53,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:53,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:27:53,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930749508] [2022-07-19 21:27:53,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:53,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:27:53,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:53,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:27:53,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:27:53,143 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-19 21:27:53,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 233 transitions, 839 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:53,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-19 21:27:53,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:53,417 INFO L129 PetriNetUnfolder]: 125/1268 cut-off events. [2022-07-19 21:27:53,417 INFO L130 PetriNetUnfolder]: For 2147/2191 co-relation queries the response was YES. [2022-07-19 21:27:53,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2829 conditions, 1268 events. 125/1268 cut-off events. For 2147/2191 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7810 event pairs, 52 based on Foata normal form. 2/1195 useless extension candidates. Maximal degree in co-relation 2787. Up to 243 conditions per place. [2022-07-19 21:27:53,431 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 39 selfloop transitions, 8 changer transitions 11/257 dead transitions. [2022-07-19 21:27:53,431 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 257 transitions, 1171 flow [2022-07-19 21:27:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:27:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:27:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2150 transitions. [2022-07-19 21:27:53,435 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.849802371541502 [2022-07-19 21:27:53,435 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2150 transitions. [2022-07-19 21:27:53,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2150 transitions. [2022-07-19 21:27:53,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:53,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2150 transitions. [2022-07-19 21:27:53,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.45454545454547) internal successors, (2150), 11 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,444 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,444 INFO L186 Difference]: Start difference. First operand has 277 places, 233 transitions, 839 flow. Second operand 11 states and 2150 transitions. [2022-07-19 21:27:53,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 257 transitions, 1171 flow [2022-07-19 21:27:53,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 257 transitions, 1079 flow, removed 25 selfloop flow, removed 13 redundant places. [2022-07-19 21:27:53,456 INFO L242 Difference]: Finished difference. Result has 275 places, 239 transitions, 894 flow [2022-07-19 21:27:53,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=894, PETRI_PLACES=275, PETRI_TRANSITIONS=239} [2022-07-19 21:27:53,457 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 65 predicate places. [2022-07-19 21:27:53,458 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 239 transitions, 894 flow [2022-07-19 21:27:53,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,458 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:53,459 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:53,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:27:53,459 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:53,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:53,459 INFO L85 PathProgramCache]: Analyzing trace with hash 978295640, now seen corresponding path program 3 times [2022-07-19 21:27:53,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:53,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679226514] [2022-07-19 21:27:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:53,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:53,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:53,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679226514] [2022-07-19 21:27:53,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679226514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:53,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:53,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:27:53,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208733204] [2022-07-19 21:27:53,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:53,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:27:53,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:53,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:27:53,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:27:53,525 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-19 21:27:53,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 239 transitions, 894 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:53,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-19 21:27:53,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:53,833 INFO L129 PetriNetUnfolder]: 127/1357 cut-off events. [2022-07-19 21:27:53,834 INFO L130 PetriNetUnfolder]: For 2108/2168 co-relation queries the response was YES. [2022-07-19 21:27:53,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 1357 events. 127/1357 cut-off events. For 2108/2168 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 8638 event pairs, 46 based on Foata normal form. 2/1281 useless extension candidates. Maximal degree in co-relation 2891. Up to 243 conditions per place. [2022-07-19 21:27:53,850 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 43 selfloop transitions, 10 changer transitions 12/264 dead transitions. [2022-07-19 21:27:53,850 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 264 transitions, 1227 flow [2022-07-19 21:27:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:27:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:27:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2152 transitions. [2022-07-19 21:27:53,854 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.850592885375494 [2022-07-19 21:27:53,854 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2152 transitions. [2022-07-19 21:27:53,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2152 transitions. [2022-07-19 21:27:53,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:53,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2152 transitions. [2022-07-19 21:27:53,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.63636363636363) internal successors, (2152), 11 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,862 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,862 INFO L186 Difference]: Start difference. First operand has 275 places, 239 transitions, 894 flow. Second operand 11 states and 2152 transitions. [2022-07-19 21:27:53,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 264 transitions, 1227 flow [2022-07-19 21:27:53,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 264 transitions, 1164 flow, removed 27 selfloop flow, removed 5 redundant places. [2022-07-19 21:27:53,876 INFO L242 Difference]: Finished difference. Result has 283 places, 245 transitions, 959 flow [2022-07-19 21:27:53,877 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=959, PETRI_PLACES=283, PETRI_TRANSITIONS=245} [2022-07-19 21:27:53,877 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 73 predicate places. [2022-07-19 21:27:53,878 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 245 transitions, 959 flow [2022-07-19 21:27:53,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,879 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:53,879 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:53,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:27:53,879 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash 54580004, now seen corresponding path program 4 times [2022-07-19 21:27:53,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:53,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67172336] [2022-07-19 21:27:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:53,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:53,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:53,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67172336] [2022-07-19 21:27:53,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67172336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:53,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:53,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:27:53,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872701875] [2022-07-19 21:27:53,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:53,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:27:53,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:53,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:27:53,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:27:53,940 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-19 21:27:53,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 245 transitions, 959 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:53,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:53,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-19 21:27:53,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:54,252 INFO L129 PetriNetUnfolder]: 123/1369 cut-off events. [2022-07-19 21:27:54,252 INFO L130 PetriNetUnfolder]: For 2546/2624 co-relation queries the response was YES. [2022-07-19 21:27:54,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3065 conditions, 1369 events. 123/1369 cut-off events. For 2546/2624 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 8830 event pairs, 36 based on Foata normal form. 6/1303 useless extension candidates. Maximal degree in co-relation 3019. Up to 175 conditions per place. [2022-07-19 21:27:54,268 INFO L132 encePairwiseOnDemand]: 219/230 looper letters, 55 selfloop transitions, 11 changer transitions 17/282 dead transitions. [2022-07-19 21:27:54,268 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 282 transitions, 1420 flow [2022-07-19 21:27:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:27:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:27:54,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2543 transitions. [2022-07-19 21:27:54,272 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8505016722408026 [2022-07-19 21:27:54,272 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2543 transitions. [2022-07-19 21:27:54,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2543 transitions. [2022-07-19 21:27:54,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:54,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2543 transitions. [2022-07-19 21:27:54,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 195.6153846153846) internal successors, (2543), 13 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,281 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,281 INFO L186 Difference]: Start difference. First operand has 283 places, 245 transitions, 959 flow. Second operand 13 states and 2543 transitions. [2022-07-19 21:27:54,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 282 transitions, 1420 flow [2022-07-19 21:27:54,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 282 transitions, 1296 flow, removed 57 selfloop flow, removed 5 redundant places. [2022-07-19 21:27:54,296 INFO L242 Difference]: Finished difference. Result has 294 places, 245 transitions, 956 flow [2022-07-19 21:27:54,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=956, PETRI_PLACES=294, PETRI_TRANSITIONS=245} [2022-07-19 21:27:54,297 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 84 predicate places. [2022-07-19 21:27:54,298 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 245 transitions, 956 flow [2022-07-19 21:27:54,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,298 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:54,298 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:54,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:27:54,299 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:54,299 INFO L85 PathProgramCache]: Analyzing trace with hash 99211608, now seen corresponding path program 5 times [2022-07-19 21:27:54,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:54,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90197657] [2022-07-19 21:27:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:54,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:54,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:54,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90197657] [2022-07-19 21:27:54,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90197657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:54,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:54,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:27:54,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794459573] [2022-07-19 21:27:54,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:54,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:27:54,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:54,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:27:54,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:27:54,362 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-19 21:27:54,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 245 transitions, 956 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:54,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-19 21:27:54,363 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:54,650 INFO L129 PetriNetUnfolder]: 113/1356 cut-off events. [2022-07-19 21:27:54,651 INFO L130 PetriNetUnfolder]: For 2504/2578 co-relation queries the response was YES. [2022-07-19 21:27:54,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2952 conditions, 1356 events. 113/1356 cut-off events. For 2504/2578 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 8707 event pairs, 44 based on Foata normal form. 10/1289 useless extension candidates. Maximal degree in co-relation 2901. Up to 231 conditions per place. [2022-07-19 21:27:54,668 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 41 selfloop transitions, 4 changer transitions 18/262 dead transitions. [2022-07-19 21:27:54,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 262 transitions, 1219 flow [2022-07-19 21:27:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:27:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:27:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2341 transitions. [2022-07-19 21:27:54,673 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8481884057971014 [2022-07-19 21:27:54,673 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2341 transitions. [2022-07-19 21:27:54,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2341 transitions. [2022-07-19 21:27:54,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:54,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2341 transitions. [2022-07-19 21:27:54,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 195.08333333333334) internal successors, (2341), 12 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,682 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,682 INFO L186 Difference]: Start difference. First operand has 294 places, 245 transitions, 956 flow. Second operand 12 states and 2341 transitions. [2022-07-19 21:27:54,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 262 transitions, 1219 flow [2022-07-19 21:27:54,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 262 transitions, 1140 flow, removed 16 selfloop flow, removed 12 redundant places. [2022-07-19 21:27:54,698 INFO L242 Difference]: Finished difference. Result has 291 places, 239 transitions, 882 flow [2022-07-19 21:27:54,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=882, PETRI_PLACES=291, PETRI_TRANSITIONS=239} [2022-07-19 21:27:54,700 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 81 predicate places. [2022-07-19 21:27:54,700 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 239 transitions, 882 flow [2022-07-19 21:27:54,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,701 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:54,701 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:54,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:27:54,701 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:54,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1404127444, now seen corresponding path program 6 times [2022-07-19 21:27:54,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:54,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204044328] [2022-07-19 21:27:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:54,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:54,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:54,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204044328] [2022-07-19 21:27:54,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204044328] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:54,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:54,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:27:54,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064316433] [2022-07-19 21:27:54,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:54,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:27:54,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:54,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:27:54,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:27:54,772 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-19 21:27:54,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 239 transitions, 882 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:54,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:54,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-19 21:27:54,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:55,053 INFO L129 PetriNetUnfolder]: 105/1261 cut-off events. [2022-07-19 21:27:55,054 INFO L130 PetriNetUnfolder]: For 2078/2149 co-relation queries the response was YES. [2022-07-19 21:27:55,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 1261 events. 105/1261 cut-off events. For 2078/2149 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7824 event pairs, 44 based on Foata normal form. 4/1191 useless extension candidates. Maximal degree in co-relation 2568. Up to 207 conditions per place. [2022-07-19 21:27:55,069 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 36 selfloop transitions, 2 changer transitions 19/254 dead transitions. [2022-07-19 21:27:55,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 254 transitions, 1097 flow [2022-07-19 21:27:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:27:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:27:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2340 transitions. [2022-07-19 21:27:55,072 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8478260869565217 [2022-07-19 21:27:55,072 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2340 transitions. [2022-07-19 21:27:55,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2340 transitions. [2022-07-19 21:27:55,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:55,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2340 transitions. [2022-07-19 21:27:55,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,079 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,080 INFO L186 Difference]: Start difference. First operand has 291 places, 239 transitions, 882 flow. Second operand 12 states and 2340 transitions. [2022-07-19 21:27:55,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 254 transitions, 1097 flow [2022-07-19 21:27:55,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 254 transitions, 1035 flow, removed 18 selfloop flow, removed 13 redundant places. [2022-07-19 21:27:55,093 INFO L242 Difference]: Finished difference. Result has 283 places, 231 transitions, 807 flow [2022-07-19 21:27:55,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=807, PETRI_PLACES=283, PETRI_TRANSITIONS=231} [2022-07-19 21:27:55,094 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 73 predicate places. [2022-07-19 21:27:55,096 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 231 transitions, 807 flow [2022-07-19 21:27:55,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,097 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:55,097 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:55,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:27:55,097 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:55,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:55,098 INFO L85 PathProgramCache]: Analyzing trace with hash 595118248, now seen corresponding path program 6 times [2022-07-19 21:27:55,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:55,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329279259] [2022-07-19 21:27:55,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:55,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:55,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:55,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329279259] [2022-07-19 21:27:55,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329279259] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:55,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:55,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:27:55,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377566144] [2022-07-19 21:27:55,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:55,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:27:55,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:55,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:27:55,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:27:55,158 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 230 [2022-07-19 21:27:55,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 231 transitions, 807 flow. Second operand has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:55,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 230 [2022-07-19 21:27:55,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:55,417 INFO L129 PetriNetUnfolder]: 98/1174 cut-off events. [2022-07-19 21:27:55,417 INFO L130 PetriNetUnfolder]: For 1494/1545 co-relation queries the response was YES. [2022-07-19 21:27:55,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2292 conditions, 1174 events. 98/1174 cut-off events. For 1494/1545 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 7003 event pairs, 44 based on Foata normal form. 4/1104 useless extension candidates. Maximal degree in co-relation 2247. Up to 164 conditions per place. [2022-07-19 21:27:55,429 INFO L132 encePairwiseOnDemand]: 221/230 looper letters, 30 selfloop transitions, 2 changer transitions 19/246 dead transitions. [2022-07-19 21:27:55,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 246 transitions, 997 flow [2022-07-19 21:27:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:27:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:27:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2340 transitions. [2022-07-19 21:27:55,433 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8478260869565217 [2022-07-19 21:27:55,433 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2340 transitions. [2022-07-19 21:27:55,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2340 transitions. [2022-07-19 21:27:55,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:55,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2340 transitions. [2022-07-19 21:27:55,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,441 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,441 INFO L186 Difference]: Start difference. First operand has 283 places, 231 transitions, 807 flow. Second operand 12 states and 2340 transitions. [2022-07-19 21:27:55,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 246 transitions, 997 flow [2022-07-19 21:27:55,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 246 transitions, 947 flow, removed 16 selfloop flow, removed 14 redundant places. [2022-07-19 21:27:55,451 INFO L242 Difference]: Finished difference. Result has 274 places, 223 transitions, 724 flow [2022-07-19 21:27:55,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=724, PETRI_PLACES=274, PETRI_TRANSITIONS=223} [2022-07-19 21:27:55,452 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 64 predicate places. [2022-07-19 21:27:55,452 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 223 transitions, 724 flow [2022-07-19 21:27:55,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.75) internal successors, (1550), 8 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,453 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:55,453 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:55,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 21:27:55,454 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:55,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:55,454 INFO L85 PathProgramCache]: Analyzing trace with hash 327908216, now seen corresponding path program 1 times [2022-07-19 21:27:55,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:55,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851607023] [2022-07-19 21:27:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:55,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:55,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:55,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851607023] [2022-07-19 21:27:55,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851607023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:55,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:55,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:27:55,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890590431] [2022-07-19 21:27:55,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:55,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:27:55,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:55,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:27:55,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:27:55,505 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-19 21:27:55,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 223 transitions, 724 flow. Second operand has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:55,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-19 21:27:55,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:55,799 INFO L129 PetriNetUnfolder]: 139/2099 cut-off events. [2022-07-19 21:27:55,799 INFO L130 PetriNetUnfolder]: For 1573/1600 co-relation queries the response was YES. [2022-07-19 21:27:55,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3390 conditions, 2099 events. 139/2099 cut-off events. For 1573/1600 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 15067 event pairs, 57 based on Foata normal form. 1/1932 useless extension candidates. Maximal degree in co-relation 3349. Up to 121 conditions per place. [2022-07-19 21:27:55,816 INFO L132 encePairwiseOnDemand]: 223/230 looper letters, 27 selfloop transitions, 5 changer transitions 3/242 dead transitions. [2022-07-19 21:27:55,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 242 transitions, 836 flow [2022-07-19 21:27:55,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:27:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:27:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1242 transitions. [2022-07-19 21:27:55,819 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-19 21:27:55,819 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1242 transitions. [2022-07-19 21:27:55,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1242 transitions. [2022-07-19 21:27:55,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:55,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1242 transitions. [2022-07-19 21:27:55,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,823 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,823 INFO L186 Difference]: Start difference. First operand has 274 places, 223 transitions, 724 flow. Second operand 6 states and 1242 transitions. [2022-07-19 21:27:55,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 242 transitions, 836 flow [2022-07-19 21:27:55,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 242 transitions, 795 flow, removed 10 selfloop flow, removed 14 redundant places. [2022-07-19 21:27:55,835 INFO L242 Difference]: Finished difference. Result has 256 places, 225 transitions, 709 flow [2022-07-19 21:27:55,836 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=709, PETRI_PLACES=256, PETRI_TRANSITIONS=225} [2022-07-19 21:27:55,836 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 46 predicate places. [2022-07-19 21:27:55,836 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 225 transitions, 709 flow [2022-07-19 21:27:55,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:55,837 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:55,837 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:55,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 21:27:55,837 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:55,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1398640822, now seen corresponding path program 2 times [2022-07-19 21:27:55,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:55,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011665487] [2022-07-19 21:27:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:55,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:55,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:55,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011665487] [2022-07-19 21:27:55,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011665487] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:27:55,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763520496] [2022-07-19 21:27:55,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:27:55,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:55,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:27:55,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:27:55,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:27:56,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:27:56,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:27:56,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:27:56,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:27:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:56,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:27:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:56,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763520496] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:27:56,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:27:56,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-19 21:27:56,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040597461] [2022-07-19 21:27:56,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:27:56,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:27:56,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:56,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:27:56,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-19 21:27:56,333 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-19 21:27:56,334 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 225 transitions, 709 flow. Second operand has 9 states, 9 states have (on average 203.44444444444446) internal successors, (1831), 9 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:56,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:56,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-19 21:27:56,334 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:56,932 INFO L129 PetriNetUnfolder]: 204/3253 cut-off events. [2022-07-19 21:27:56,932 INFO L130 PetriNetUnfolder]: For 1596/1641 co-relation queries the response was YES. [2022-07-19 21:27:56,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4900 conditions, 3253 events. 204/3253 cut-off events. For 1596/1641 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 25693 event pairs, 57 based on Foata normal form. 9/3062 useless extension candidates. Maximal degree in co-relation 4866. Up to 86 conditions per place. [2022-07-19 21:27:56,956 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 51 selfloop transitions, 31 changer transitions 1/290 dead transitions. [2022-07-19 21:27:56,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 290 transitions, 1089 flow [2022-07-19 21:27:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:27:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:27:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2890 transitions. [2022-07-19 21:27:56,960 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8975155279503105 [2022-07-19 21:27:56,960 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2890 transitions. [2022-07-19 21:27:56,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2890 transitions. [2022-07-19 21:27:56,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:56,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2890 transitions. [2022-07-19 21:27:56,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 206.42857142857142) internal successors, (2890), 14 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:56,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 230.0) internal successors, (3450), 15 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:56,969 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 230.0) internal successors, (3450), 15 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:56,969 INFO L186 Difference]: Start difference. First operand has 256 places, 225 transitions, 709 flow. Second operand 14 states and 2890 transitions. [2022-07-19 21:27:56,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 290 transitions, 1089 flow [2022-07-19 21:27:56,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 290 transitions, 1062 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-07-19 21:27:56,983 INFO L242 Difference]: Finished difference. Result has 272 places, 257 transitions, 921 flow [2022-07-19 21:27:56,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=921, PETRI_PLACES=272, PETRI_TRANSITIONS=257} [2022-07-19 21:27:56,984 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 62 predicate places. [2022-07-19 21:27:56,984 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 257 transitions, 921 flow [2022-07-19 21:27:56,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 203.44444444444446) internal successors, (1831), 9 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:56,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:56,985 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:57,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:27:57,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:57,200 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:57,200 INFO L85 PathProgramCache]: Analyzing trace with hash -943829332, now seen corresponding path program 3 times [2022-07-19 21:27:57,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:57,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437270740] [2022-07-19 21:27:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:57,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:57,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:57,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437270740] [2022-07-19 21:27:57,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437270740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:27:57,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:27:57,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:27:57,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486420823] [2022-07-19 21:27:57,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:27:57,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:27:57,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:57,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:27:57,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:27:57,266 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-19 21:27:57,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 257 transitions, 921 flow. Second operand has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:57,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:57,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-19 21:27:57,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:57,858 INFO L129 PetriNetUnfolder]: 243/3590 cut-off events. [2022-07-19 21:27:57,859 INFO L130 PetriNetUnfolder]: For 2357/2404 co-relation queries the response was YES. [2022-07-19 21:27:57,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5802 conditions, 3590 events. 243/3590 cut-off events. For 2357/2404 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 28823 event pairs, 96 based on Foata normal form. 8/3368 useless extension candidates. Maximal degree in co-relation 5762. Up to 205 conditions per place. [2022-07-19 21:27:57,897 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 61 selfloop transitions, 18 changer transitions 6/292 dead transitions. [2022-07-19 21:27:57,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 292 transitions, 1279 flow [2022-07-19 21:27:57,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:27:57,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:27:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1257 transitions. [2022-07-19 21:27:57,899 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9108695652173913 [2022-07-19 21:27:57,899 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1257 transitions. [2022-07-19 21:27:57,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1257 transitions. [2022-07-19 21:27:57,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:57,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1257 transitions. [2022-07-19 21:27:57,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 209.5) internal successors, (1257), 6 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:57,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:57,904 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:57,904 INFO L186 Difference]: Start difference. First operand has 272 places, 257 transitions, 921 flow. Second operand 6 states and 1257 transitions. [2022-07-19 21:27:57,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 292 transitions, 1279 flow [2022-07-19 21:27:57,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 292 transitions, 1277 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-19 21:27:57,921 INFO L242 Difference]: Finished difference. Result has 279 places, 265 transitions, 1036 flow [2022-07-19 21:27:57,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1036, PETRI_PLACES=279, PETRI_TRANSITIONS=265} [2022-07-19 21:27:57,922 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 69 predicate places. [2022-07-19 21:27:57,922 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 265 transitions, 1036 flow [2022-07-19 21:27:57,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:57,923 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:57,923 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:57,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 21:27:57,924 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:57,924 INFO L85 PathProgramCache]: Analyzing trace with hash -737684930, now seen corresponding path program 4 times [2022-07-19 21:27:57,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:57,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107864614] [2022-07-19 21:27:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:57,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:58,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:58,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107864614] [2022-07-19 21:27:58,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107864614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:27:58,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662308624] [2022-07-19 21:27:58,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:27:58,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:58,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:27:58,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:27:58,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:27:58,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:27:58,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:27:58,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:27:58,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:27:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:58,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:27:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:58,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662308624] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:27:58,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:27:58,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-19 21:27:58,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843463215] [2022-07-19 21:27:58,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:27:58,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:27:58,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:27:58,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:27:58,436 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-19 21:27:58,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 265 transitions, 1036 flow. Second operand has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:58,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:58,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-19 21:27:58,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:27:59,138 INFO L129 PetriNetUnfolder]: 269/4115 cut-off events. [2022-07-19 21:27:59,139 INFO L130 PetriNetUnfolder]: For 3063/3121 co-relation queries the response was YES. [2022-07-19 21:27:59,158 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6730 conditions, 4115 events. 269/4115 cut-off events. For 3063/3121 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 35286 event pairs, 103 based on Foata normal form. 12/3858 useless extension candidates. Maximal degree in co-relation 6687. Up to 147 conditions per place. [2022-07-19 21:27:59,166 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 59 selfloop transitions, 50 changer transitions 0/316 dead transitions. [2022-07-19 21:27:59,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 316 transitions, 1519 flow [2022-07-19 21:27:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:27:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:27:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1873 transitions. [2022-07-19 21:27:59,169 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9048309178743962 [2022-07-19 21:27:59,169 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1873 transitions. [2022-07-19 21:27:59,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1873 transitions. [2022-07-19 21:27:59,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:27:59,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1873 transitions. [2022-07-19 21:27:59,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 208.11111111111111) internal successors, (1873), 9 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:59,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:59,175 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:59,175 INFO L186 Difference]: Start difference. First operand has 279 places, 265 transitions, 1036 flow. Second operand 9 states and 1873 transitions. [2022-07-19 21:27:59,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 316 transitions, 1519 flow [2022-07-19 21:27:59,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 316 transitions, 1502 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-19 21:27:59,195 INFO L242 Difference]: Finished difference. Result has 291 places, 286 transitions, 1327 flow [2022-07-19 21:27:59,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1327, PETRI_PLACES=291, PETRI_TRANSITIONS=286} [2022-07-19 21:27:59,196 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 81 predicate places. [2022-07-19 21:27:59,196 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 286 transitions, 1327 flow [2022-07-19 21:27:59,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:59,197 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:27:59,197 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:27:59,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:27:59,411 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,SelfDestructingSolverStorable20 [2022-07-19 21:27:59,411 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:27:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:27:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash 791573158, now seen corresponding path program 1 times [2022-07-19 21:27:59,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:27:59,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496698016] [2022-07-19 21:27:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:59,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:27:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:59,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:27:59,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496698016] [2022-07-19 21:27:59,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496698016] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:27:59,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275750701] [2022-07-19 21:27:59,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:27:59,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:27:59,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:27:59,467 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:27:59,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:27:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:27:59,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:27:59,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:27:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:59,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:27:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:27:59,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275750701] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:27:59,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:27:59,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-19 21:27:59,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224415355] [2022-07-19 21:27:59,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:27:59,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:27:59,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:27:59,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:27:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-19 21:27:59,734 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-19 21:27:59,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 286 transitions, 1327 flow. Second operand has 9 states, 9 states have (on average 203.22222222222223) internal successors, (1829), 9 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:27:59,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:27:59,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-19 21:27:59,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:00,628 INFO L129 PetriNetUnfolder]: 297/4716 cut-off events. [2022-07-19 21:28:00,628 INFO L130 PetriNetUnfolder]: For 4113/4168 co-relation queries the response was YES. [2022-07-19 21:28:00,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7974 conditions, 4716 events. 297/4716 cut-off events. For 4113/4168 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 42499 event pairs, 91 based on Foata normal form. 6/4416 useless extension candidates. Maximal degree in co-relation 7926. Up to 125 conditions per place. [2022-07-19 21:28:00,665 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 67 selfloop transitions, 77 changer transitions 2/353 dead transitions. [2022-07-19 21:28:00,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 353 transitions, 2070 flow [2022-07-19 21:28:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:28:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:28:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2886 transitions. [2022-07-19 21:28:00,669 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8962732919254658 [2022-07-19 21:28:00,669 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2886 transitions. [2022-07-19 21:28:00,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2886 transitions. [2022-07-19 21:28:00,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:00,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2886 transitions. [2022-07-19 21:28:00,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 206.14285714285714) internal successors, (2886), 14 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:00,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 230.0) internal successors, (3450), 15 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:00,679 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 230.0) internal successors, (3450), 15 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:00,679 INFO L186 Difference]: Start difference. First operand has 291 places, 286 transitions, 1327 flow. Second operand 14 states and 2886 transitions. [2022-07-19 21:28:00,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 353 transitions, 2070 flow [2022-07-19 21:28:00,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 353 transitions, 2034 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-07-19 21:28:00,705 INFO L242 Difference]: Finished difference. Result has 308 places, 320 transitions, 1808 flow [2022-07-19 21:28:00,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1808, PETRI_PLACES=308, PETRI_TRANSITIONS=320} [2022-07-19 21:28:00,706 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 98 predicate places. [2022-07-19 21:28:00,707 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 320 transitions, 1808 flow [2022-07-19 21:28:00,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 203.22222222222223) internal successors, (1829), 9 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:00,707 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:00,708 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:00,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:00,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:00,920 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:28:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:00,920 INFO L85 PathProgramCache]: Analyzing trace with hash 292599124, now seen corresponding path program 5 times [2022-07-19 21:28:00,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:00,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297632389] [2022-07-19 21:28:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:00,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:00,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:00,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297632389] [2022-07-19 21:28:00,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297632389] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:00,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584312339] [2022-07-19 21:28:00,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:28:00,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:00,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:00,995 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:28:00,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:28:01,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:28:01,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:28:01,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:28:01,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:01,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:01,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584312339] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:28:01,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:28:01,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-19 21:28:01,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794597601] [2022-07-19 21:28:01,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:28:01,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:28:01,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:01,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:28:01,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:28:01,337 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-19 21:28:01,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 320 transitions, 1808 flow. Second operand has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:01,339 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:01,339 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-19 21:28:01,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:02,315 INFO L129 PetriNetUnfolder]: 313/5434 cut-off events. [2022-07-19 21:28:02,316 INFO L130 PetriNetUnfolder]: For 4844/4897 co-relation queries the response was YES. [2022-07-19 21:28:02,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8935 conditions, 5434 events. 313/5434 cut-off events. For 4844/4897 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 50757 event pairs, 90 based on Foata normal form. 11/5081 useless extension candidates. Maximal degree in co-relation 8882. Up to 135 conditions per place. [2022-07-19 21:28:02,362 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 77 selfloop transitions, 78 changer transitions 2/364 dead transitions. [2022-07-19 21:28:02,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 364 transitions, 2375 flow [2022-07-19 21:28:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:28:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:28:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2691 transitions. [2022-07-19 21:28:02,365 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-19 21:28:02,366 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2691 transitions. [2022-07-19 21:28:02,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2691 transitions. [2022-07-19 21:28:02,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:02,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2691 transitions. [2022-07-19 21:28:02,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 207.0) internal successors, (2691), 13 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:02,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:02,373 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 230.0) internal successors, (3220), 14 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:02,373 INFO L186 Difference]: Start difference. First operand has 308 places, 320 transitions, 1808 flow. Second operand 13 states and 2691 transitions. [2022-07-19 21:28:02,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 364 transitions, 2375 flow [2022-07-19 21:28:02,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 364 transitions, 2240 flow, removed 43 selfloop flow, removed 2 redundant places. [2022-07-19 21:28:02,402 INFO L242 Difference]: Finished difference. Result has 320 places, 328 transitions, 1944 flow [2022-07-19 21:28:02,403 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1944, PETRI_PLACES=320, PETRI_TRANSITIONS=328} [2022-07-19 21:28:02,404 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 110 predicate places. [2022-07-19 21:28:02,404 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 328 transitions, 1944 flow [2022-07-19 21:28:02,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:02,404 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:02,405 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:02,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:02,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:02,615 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:28:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1917545100, now seen corresponding path program 2 times [2022-07-19 21:28:02,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:02,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542226494] [2022-07-19 21:28:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:02,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:02,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:02,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542226494] [2022-07-19 21:28:02,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542226494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:02,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956452115] [2022-07-19 21:28:02,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:28:02,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:02,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:02,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:28:02,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:28:02,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:28:02,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:28:02,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:28:02,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:02,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:03,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956452115] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:28:03,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:28:03,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-19 21:28:03,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682643479] [2022-07-19 21:28:03,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:28:03,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:28:03,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:03,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:28:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:28:03,035 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-19 21:28:03,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 328 transitions, 1944 flow. Second operand has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:03,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:03,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-19 21:28:03,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:03,887 INFO L129 PetriNetUnfolder]: 314/5772 cut-off events. [2022-07-19 21:28:03,887 INFO L130 PetriNetUnfolder]: For 5293/5347 co-relation queries the response was YES. [2022-07-19 21:28:03,928 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9488 conditions, 5772 events. 314/5772 cut-off events. For 5293/5347 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 54834 event pairs, 144 based on Foata normal form. 5/5384 useless extension candidates. Maximal degree in co-relation 9434. Up to 277 conditions per place. [2022-07-19 21:28:03,941 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 96 selfloop transitions, 53 changer transitions 1/357 dead transitions. [2022-07-19 21:28:03,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 357 transitions, 2420 flow [2022-07-19 21:28:03,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:28:04,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:28:04,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1865 transitions. [2022-07-19 21:28:04,014 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9009661835748792 [2022-07-19 21:28:04,014 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1865 transitions. [2022-07-19 21:28:04,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1865 transitions. [2022-07-19 21:28:04,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:04,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1865 transitions. [2022-07-19 21:28:04,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.22222222222223) internal successors, (1865), 9 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:04,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:04,018 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:04,018 INFO L186 Difference]: Start difference. First operand has 320 places, 328 transitions, 1944 flow. Second operand 9 states and 1865 transitions. [2022-07-19 21:28:04,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 357 transitions, 2420 flow [2022-07-19 21:28:04,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 357 transitions, 2392 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-07-19 21:28:04,075 INFO L242 Difference]: Finished difference. Result has 327 places, 338 transitions, 2168 flow [2022-07-19 21:28:04,075 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2168, PETRI_PLACES=327, PETRI_TRANSITIONS=338} [2022-07-19 21:28:04,076 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 117 predicate places. [2022-07-19 21:28:04,076 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 338 transitions, 2168 flow [2022-07-19 21:28:04,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:04,077 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:04,077 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:04,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:04,291 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,SelfDestructingSolverStorable23 [2022-07-19 21:28:04,291 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:28:04,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:04,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1082551282, now seen corresponding path program 3 times [2022-07-19 21:28:04,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:04,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292688792] [2022-07-19 21:28:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:04,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:04,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:04,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292688792] [2022-07-19 21:28:04,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292688792] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:28:04,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:28:04,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:28:04,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984847638] [2022-07-19 21:28:04,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:28:04,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:28:04,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:28:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:28:04,403 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-19 21:28:04,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 338 transitions, 2168 flow. Second operand has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:04,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:04,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-19 21:28:04,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:05,268 INFO L129 PetriNetUnfolder]: 291/4843 cut-off events. [2022-07-19 21:28:05,268 INFO L130 PetriNetUnfolder]: For 5151/5193 co-relation queries the response was YES. [2022-07-19 21:28:05,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8278 conditions, 4843 events. 291/4843 cut-off events. For 5151/5193 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 44627 event pairs, 140 based on Foata normal form. 4/4504 useless extension candidates. Maximal degree in co-relation 8222. Up to 311 conditions per place. [2022-07-19 21:28:05,298 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 102 selfloop transitions, 34 changer transitions 10/345 dead transitions. [2022-07-19 21:28:05,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 345 transitions, 2504 flow [2022-07-19 21:28:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:28:05,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:28:05,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1245 transitions. [2022-07-19 21:28:05,302 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9021739130434783 [2022-07-19 21:28:05,302 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1245 transitions. [2022-07-19 21:28:05,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1245 transitions. [2022-07-19 21:28:05,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:05,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1245 transitions. [2022-07-19 21:28:05,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.5) internal successors, (1245), 6 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:05,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:05,306 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:05,306 INFO L186 Difference]: Start difference. First operand has 327 places, 338 transitions, 2168 flow. Second operand 6 states and 1245 transitions. [2022-07-19 21:28:05,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 345 transitions, 2504 flow [2022-07-19 21:28:05,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 345 transitions, 2377 flow, removed 15 selfloop flow, removed 6 redundant places. [2022-07-19 21:28:05,335 INFO L242 Difference]: Finished difference. Result has 328 places, 329 transitions, 2017 flow [2022-07-19 21:28:05,335 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2017, PETRI_PLACES=328, PETRI_TRANSITIONS=329} [2022-07-19 21:28:05,336 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 118 predicate places. [2022-07-19 21:28:05,336 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 329 transitions, 2017 flow [2022-07-19 21:28:05,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:05,336 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:05,336 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:05,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-19 21:28:05,337 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:28:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:05,337 INFO L85 PathProgramCache]: Analyzing trace with hash -914373658, now seen corresponding path program 4 times [2022-07-19 21:28:05,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:05,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580827857] [2022-07-19 21:28:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:05,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:05,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:05,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580827857] [2022-07-19 21:28:05,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580827857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:05,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373061345] [2022-07-19 21:28:05,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:28:05,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:05,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:05,404 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:28:05,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:28:05,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:28:05,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:28:05,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:28:05,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:05,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:05,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373061345] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:28:05,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:28:05,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-19 21:28:05,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088423110] [2022-07-19 21:28:05,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:28:05,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:28:05,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:05,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:28:05,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:28:05,745 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 230 [2022-07-19 21:28:05,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 329 transitions, 2017 flow. Second operand has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:05,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:05,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 230 [2022-07-19 21:28:05,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:06,719 INFO L129 PetriNetUnfolder]: 284/5083 cut-off events. [2022-07-19 21:28:06,719 INFO L130 PetriNetUnfolder]: For 4606/4648 co-relation queries the response was YES. [2022-07-19 21:28:06,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8341 conditions, 5083 events. 284/5083 cut-off events. For 4606/4648 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 47734 event pairs, 105 based on Foata normal form. 4/4737 useless extension candidates. Maximal degree in co-relation 8286. Up to 170 conditions per place. [2022-07-19 21:28:06,756 INFO L132 encePairwiseOnDemand]: 222/230 looper letters, 78 selfloop transitions, 85 changer transitions 1/363 dead transitions. [2022-07-19 21:28:06,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 363 transitions, 2555 flow [2022-07-19 21:28:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:28:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:28:06,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2476 transitions. [2022-07-19 21:28:06,760 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8971014492753623 [2022-07-19 21:28:06,760 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2476 transitions. [2022-07-19 21:28:06,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2476 transitions. [2022-07-19 21:28:06,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:06,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2476 transitions. [2022-07-19 21:28:06,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 206.33333333333334) internal successors, (2476), 12 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:06,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:06,766 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:06,766 INFO L186 Difference]: Start difference. First operand has 328 places, 329 transitions, 2017 flow. Second operand 12 states and 2476 transitions. [2022-07-19 21:28:06,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 363 transitions, 2555 flow [2022-07-19 21:28:06,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 363 transitions, 2373 flow, removed 5 selfloop flow, removed 19 redundant places. [2022-07-19 21:28:06,785 INFO L242 Difference]: Finished difference. Result has 317 places, 339 transitions, 2119 flow [2022-07-19 21:28:06,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2119, PETRI_PLACES=317, PETRI_TRANSITIONS=339} [2022-07-19 21:28:06,786 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 107 predicate places. [2022-07-19 21:28:06,786 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 339 transitions, 2119 flow [2022-07-19 21:28:06,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.36363636363637) internal successors, (2237), 11 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:06,787 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:06,787 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:06,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:07,009 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,SelfDestructingSolverStorable25 [2022-07-19 21:28:07,009 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:28:07,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:07,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1340311248, now seen corresponding path program 1 times [2022-07-19 21:28:07,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:07,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908219557] [2022-07-19 21:28:07,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:07,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:07,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:07,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908219557] [2022-07-19 21:28:07,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908219557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:07,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725942021] [2022-07-19 21:28:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:07,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:07,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:07,226 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:28:07,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:28:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:07,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 21:28:07,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:07,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:08,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725942021] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:28:08,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:28:08,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 39 [2022-07-19 21:28:08,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768460864] [2022-07-19 21:28:08,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:28:08,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 21:28:08,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:08,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 21:28:08,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 21:28:08,471 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 230 [2022-07-19 21:28:08,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 339 transitions, 2119 flow. Second operand has 39 states, 39 states have (on average 165.53846153846155) internal successors, (6456), 39 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:08,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:08,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 230 [2022-07-19 21:28:08,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:19,316 INFO L129 PetriNetUnfolder]: 6477/37839 cut-off events. [2022-07-19 21:28:19,316 INFO L130 PetriNetUnfolder]: For 25955/26122 co-relation queries the response was YES. [2022-07-19 21:28:19,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67955 conditions, 37839 events. 6477/37839 cut-off events. For 25955/26122 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 513011 event pairs, 984 based on Foata normal form. 34/35817 useless extension candidates. Maximal degree in co-relation 67913. Up to 5697 conditions per place. [2022-07-19 21:28:19,733 INFO L132 encePairwiseOnDemand]: 199/230 looper letters, 580 selfloop transitions, 228 changer transitions 9/1098 dead transitions. [2022-07-19 21:28:19,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1098 transitions, 5738 flow [2022-07-19 21:28:19,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-07-19 21:28:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2022-07-19 21:28:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 21840 transitions. [2022-07-19 21:28:19,765 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7360970677451971 [2022-07-19 21:28:19,765 INFO L72 ComplementDD]: Start complementDD. Operand 129 states and 21840 transitions. [2022-07-19 21:28:19,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 21840 transitions. [2022-07-19 21:28:19,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:19,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 129 states and 21840 transitions. [2022-07-19 21:28:19,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 130 states, 129 states have (on average 169.30232558139534) internal successors, (21840), 129 states have internal predecessors, (21840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:19,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 130 states, 130 states have (on average 230.0) internal successors, (29900), 130 states have internal predecessors, (29900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:19,967 INFO L81 ComplementDD]: Finished complementDD. Result has 130 states, 130 states have (on average 230.0) internal successors, (29900), 130 states have internal predecessors, (29900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:19,968 INFO L186 Difference]: Start difference. First operand has 317 places, 339 transitions, 2119 flow. Second operand 129 states and 21840 transitions. [2022-07-19 21:28:19,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1098 transitions, 5738 flow [2022-07-19 21:28:20,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1098 transitions, 5607 flow, removed 4 selfloop flow, removed 7 redundant places. [2022-07-19 21:28:20,274 INFO L242 Difference]: Finished difference. Result has 525 places, 578 transitions, 3837 flow [2022-07-19 21:28:20,275 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=129, PETRI_FLOW=3837, PETRI_PLACES=525, PETRI_TRANSITIONS=578} [2022-07-19 21:28:20,275 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 315 predicate places. [2022-07-19 21:28:20,276 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 578 transitions, 3837 flow [2022-07-19 21:28:20,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 165.53846153846155) internal successors, (6456), 39 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:20,277 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:20,277 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:20,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:20,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:20,484 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:28:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:20,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1059582534, now seen corresponding path program 2 times [2022-07-19 21:28:20,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:20,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902541468] [2022-07-19 21:28:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:20,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:20,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:20,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902541468] [2022-07-19 21:28:20,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902541468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:20,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893518613] [2022-07-19 21:28:20,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:28:20,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:20,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:20,731 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:28:20,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:28:20,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:28:20,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:28:20,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 21:28:20,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:21,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:21,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893518613] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:28:21,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:28:21,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 39 [2022-07-19 21:28:21,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159735097] [2022-07-19 21:28:21,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:28:21,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 21:28:21,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:21,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 21:28:21,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 21:28:21,897 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 230 [2022-07-19 21:28:21,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 578 transitions, 3837 flow. Second operand has 39 states, 39 states have (on average 165.53846153846155) internal successors, (6456), 39 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:21,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:21,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 230 [2022-07-19 21:28:21,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:35,348 INFO L129 PetriNetUnfolder]: 7767/45287 cut-off events. [2022-07-19 21:28:35,349 INFO L130 PetriNetUnfolder]: For 265095/266001 co-relation queries the response was YES. [2022-07-19 21:28:36,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129585 conditions, 45287 events. 7767/45287 cut-off events. For 265095/266001 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 637527 event pairs, 2638 based on Foata normal form. 172/42669 useless extension candidates. Maximal degree in co-relation 129460. Up to 9436 conditions per place. [2022-07-19 21:28:36,720 INFO L132 encePairwiseOnDemand]: 201/230 looper letters, 523 selfloop transitions, 145 changer transitions 5/954 dead transitions. [2022-07-19 21:28:36,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 954 transitions, 7924 flow [2022-07-19 21:28:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:28:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:28:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 7735 transitions. [2022-07-19 21:28:36,890 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7473429951690821 [2022-07-19 21:28:36,890 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 7735 transitions. [2022-07-19 21:28:36,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 7735 transitions. [2022-07-19 21:28:36,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:36,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 7735 transitions. [2022-07-19 21:28:36,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 171.88888888888889) internal successors, (7735), 45 states have internal predecessors, (7735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:36,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 230.0) internal successors, (10580), 46 states have internal predecessors, (10580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:36,925 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 230.0) internal successors, (10580), 46 states have internal predecessors, (10580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:36,925 INFO L186 Difference]: Start difference. First operand has 525 places, 578 transitions, 3837 flow. Second operand 45 states and 7735 transitions. [2022-07-19 21:28:36,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 954 transitions, 7924 flow [2022-07-19 21:28:38,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 954 transitions, 7640 flow, removed 110 selfloop flow, removed 7 redundant places. [2022-07-19 21:28:38,345 INFO L242 Difference]: Finished difference. Result has 593 places, 678 transitions, 5017 flow [2022-07-19 21:28:38,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5017, PETRI_PLACES=593, PETRI_TRANSITIONS=678} [2022-07-19 21:28:38,347 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 383 predicate places. [2022-07-19 21:28:38,347 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 678 transitions, 5017 flow [2022-07-19 21:28:38,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 165.53846153846155) internal successors, (6456), 39 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:38,348 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:38,349 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:38,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 21:28:38,571 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,SelfDestructingSolverStorable27 [2022-07-19 21:28:38,571 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:28:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash -600668230, now seen corresponding path program 3 times [2022-07-19 21:28:38,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:38,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361968888] [2022-07-19 21:28:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:38,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:38,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:38,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361968888] [2022-07-19 21:28:38,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361968888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:28:38,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390222749] [2022-07-19 21:28:38,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:28:38,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:28:38,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:38,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:28:38,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:28:38,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:28:38,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:28:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 21:28:38,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:28:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:39,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:28:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:40,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390222749] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:28:40,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:28:40,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 41 [2022-07-19 21:28:40,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061630412] [2022-07-19 21:28:40,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:28:40,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 21:28:40,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:40,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 21:28:40,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1516, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 21:28:40,070 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 230 [2022-07-19 21:28:40,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 678 transitions, 5017 flow. Second operand has 41 states, 41 states have (on average 165.5121951219512) internal successors, (6786), 41 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:28:40,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:40,073 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 230 [2022-07-19 21:28:40,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand