./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/popl20-commit-2.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 f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:13:01,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:13:01,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:13:01,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:13:01,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:13:01,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:13:01,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:13:01,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:13:01,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:13:01,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:13:01,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:13:01,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:13:01,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:13:01,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:13:01,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:13:01,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:13:01,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:13:01,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:13:01,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:13:01,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:13:01,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:13:01,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:13:01,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:13:01,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:13:01,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:13:01,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:13:01,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:13:01,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:13:01,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:13:01,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:13:01,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:13:01,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:13:01,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:13:01,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:13:01,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:13:01,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:13:01,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:13:01,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:13:01,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:13:01,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:13:01,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:13:01,340 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:13:01,381 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:13:01,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:13:01,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:13:01,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:13:01,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:13:01,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:13:01,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:13:01,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:13:01,385 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:13:01,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:13:01,386 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:13:01,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:13:01,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:13:01,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:13:01,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:13:01,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:13:01,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:13:01,387 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:13:01,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:13:01,388 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:13:01,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:13:01,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:13:01,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:13:01,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:13:01,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:13:01,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:13:01,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:13:01,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:13:01,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:13:01,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:13:01,390 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:13:01,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:13:01,390 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:13:01,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:13:01,391 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:13:01,391 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:13:01,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:13:01,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:13:01,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:13:01,692 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:13:01,692 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:13:01,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c [2023-08-30 20:13:02,733 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:13:02,929 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:13:02,931 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c [2023-08-30 20:13:02,942 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f50ab3a86/9fa5122f4fe9479b8397a910c158e50d/FLAGc781dd695 [2023-08-30 20:13:02,960 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f50ab3a86/9fa5122f4fe9479b8397a910c158e50d [2023-08-30 20:13:02,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:13:02,965 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:13:02,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:13:02,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:13:02,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:13:02,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:13:02" (1/1) ... [2023-08-30 20:13:02,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45b24d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:02, skipping insertion in model container [2023-08-30 20:13:02,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:13:02" (1/1) ... [2023-08-30 20:13:02,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:13:03,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:13:03,229 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c[5846,5859] [2023-08-30 20:13:03,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:13:03,254 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:13:03,294 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-commit-2.wvr.c[5846,5859] [2023-08-30 20:13:03,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:13:03,316 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:13:03,317 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:13:03,322 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:13:03,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:03 WrapperNode [2023-08-30 20:13:03,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:13:03,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:13:03,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:13:03,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:13:03,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:03" (1/1) ... [2023-08-30 20:13:03,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:03" (1/1) ... [2023-08-30 20:13:03,398 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 474 [2023-08-30 20:13:03,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:13:03,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:13:03,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:13:03,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:13:03,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:03" (1/1) ... [2023-08-30 20:13:03,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:03" (1/1) ... [2023-08-30 20:13:03,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:03" (1/1) ... [2023-08-30 20:13:03,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:03" (1/1) ... [2023-08-30 20:13:03,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:03" (1/1) ... [2023-08-30 20:13:03,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:03" (1/1) ... [2023-08-30 20:13:03,444 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:03" (1/1) ... [2023-08-30 20:13:03,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:03" (1/1) ... [2023-08-30 20:13:03,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:13:03,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:13:03,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:13:03,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:13:03,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:03" (1/1) ... [2023-08-30 20:13:03,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:13:03,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:13:03,494 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) [2023-08-30 20:13:03,524 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 [2023-08-30 20:13:03,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:13:03,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:13:03,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:13:03,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:13:03,540 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:13:03,540 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:13:03,540 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:13:03,540 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:13:03,540 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 20:13:03,540 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 20:13:03,540 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 20:13:03,541 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 20:13:03,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:13:03,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:13:03,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:13:03,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 20:13:03,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:13:03,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:13:03,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:13:03,543 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:13:03,715 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:13:03,725 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:13:04,291 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:13:04,465 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:13:04,466 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-30 20:13:04,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:13:04 BoogieIcfgContainer [2023-08-30 20:13:04,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:13:04,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:13:04,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:13:04,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:13:04,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:13:02" (1/3) ... [2023-08-30 20:13:04,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@403416f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:13:04, skipping insertion in model container [2023-08-30 20:13:04,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:13:03" (2/3) ... [2023-08-30 20:13:04,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@403416f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:13:04, skipping insertion in model container [2023-08-30 20:13:04,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:13:04" (3/3) ... [2023-08-30 20:13:04,474 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-2.wvr.c [2023-08-30 20:13:04,480 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:13:04,488 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:13:04,489 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:13:04,489 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:13:04,616 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 20:13:04,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 309 places, 321 transitions, 674 flow [2023-08-30 20:13:04,806 INFO L130 PetriNetUnfolder]: 25/317 cut-off events. [2023-08-30 20:13:04,806 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 20:13:04,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 317 events. 25/317 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 205 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 278. Up to 2 conditions per place. [2023-08-30 20:13:04,813 INFO L82 GeneralOperation]: Start removeDead. Operand has 309 places, 321 transitions, 674 flow [2023-08-30 20:13:04,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 305 transitions, 634 flow [2023-08-30 20:13:04,826 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:13:04,840 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 305 transitions, 634 flow [2023-08-30 20:13:04,844 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 305 transitions, 634 flow [2023-08-30 20:13:04,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 305 transitions, 634 flow [2023-08-30 20:13:04,905 INFO L130 PetriNetUnfolder]: 25/305 cut-off events. [2023-08-30 20:13:04,905 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 20:13:04,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 305 events. 25/305 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 278. Up to 2 conditions per place. [2023-08-30 20:13:04,911 INFO L119 LiptonReduction]: Number of co-enabled transitions 2928 [2023-08-30 20:13:15,209 INFO L134 LiptonReduction]: Checked pairs total: 6242 [2023-08-30 20:13:15,209 INFO L136 LiptonReduction]: Total number of compositions: 323 [2023-08-30 20:13:15,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:13:15,225 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6bb7f230, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:13:15,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 20:13:15,235 INFO L130 PetriNetUnfolder]: 8/40 cut-off events. [2023-08-30 20:13:15,235 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 20:13:15,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:15,236 INFO L208 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] [2023-08-30 20:13:15,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:15,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash -349444433, now seen corresponding path program 1 times [2023-08-30 20:13:15,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:15,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654798752] [2023-08-30 20:13:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:15,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:13:15,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:15,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654798752] [2023-08-30 20:13:15,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654798752] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:13:15,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:13:15,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 20:13:15,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443289564] [2023-08-30 20:13:15,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:13:15,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:13:15,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:15,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:13:15,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:13:15,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 644 [2023-08-30 20:13:15,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:15,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:15,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 644 [2023-08-30 20:13:15,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:16,407 INFO L130 PetriNetUnfolder]: 2346/3110 cut-off events. [2023-08-30 20:13:16,408 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2023-08-30 20:13:16,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6500 conditions, 3110 events. 2346/3110 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11954 event pairs, 381 based on Foata normal form. 1/2317 useless extension candidates. Maximal degree in co-relation 5552. Up to 2810 conditions per place. [2023-08-30 20:13:16,426 INFO L137 encePairwiseOnDemand]: 638/644 looper letters, 58 selfloop transitions, 5 changer transitions 1/64 dead transitions. [2023-08-30 20:13:16,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 301 flow [2023-08-30 20:13:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:13:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:13:16,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2023-08-30 20:13:16,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699792960662526 [2023-08-30 20:13:16,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2023-08-30 20:13:16,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2023-08-30 20:13:16,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:16,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2023-08-30 20:13:16,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:16,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:16,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:16,468 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 106 flow. Second operand 3 states and 908 transitions. [2023-08-30 20:13:16,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 301 flow [2023-08-30 20:13:16,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 20:13:16,478 INFO L231 Difference]: Finished difference. Result has 41 places, 45 transitions, 123 flow [2023-08-30 20:13:16,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=41, PETRI_TRANSITIONS=45} [2023-08-30 20:13:16,483 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2023-08-30 20:13:16,485 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 123 flow [2023-08-30 20:13:16,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:16,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:16,486 INFO L208 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] [2023-08-30 20:13:16,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:13:16,487 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:16,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:16,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1893474723, now seen corresponding path program 1 times [2023-08-30 20:13:16,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:16,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648374834] [2023-08-30 20:13:16,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:16,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:13:16,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:16,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648374834] [2023-08-30 20:13:16,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648374834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:13:16,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:13:16,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:13:16,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683475780] [2023-08-30 20:13:16,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:13:16,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:13:16,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:16,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:13:16,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:13:16,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 644 [2023-08-30 20:13:16,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 271.75) internal successors, (1087), 4 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:16,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:16,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 644 [2023-08-30 20:13:16,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:17,329 INFO L130 PetriNetUnfolder]: 2646/3592 cut-off events. [2023-08-30 20:13:17,330 INFO L131 PetriNetUnfolder]: For 811/811 co-relation queries the response was YES. [2023-08-30 20:13:17,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8455 conditions, 3592 events. 2646/3592 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13439 event pairs, 1817 based on Foata normal form. 166/3568 useless extension candidates. Maximal degree in co-relation 3795. Up to 3111 conditions per place. [2023-08-30 20:13:17,346 INFO L137 encePairwiseOnDemand]: 637/644 looper letters, 44 selfloop transitions, 2 changer transitions 30/76 dead transitions. [2023-08-30 20:13:17,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 76 transitions, 355 flow [2023-08-30 20:13:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:13:17,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:13:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1134 transitions. [2023-08-30 20:13:17,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44021739130434784 [2023-08-30 20:13:17,349 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1134 transitions. [2023-08-30 20:13:17,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1134 transitions. [2023-08-30 20:13:17,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:17,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1134 transitions. [2023-08-30 20:13:17,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.5) internal successors, (1134), 4 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:17,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 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) [2023-08-30 20:13:17,358 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 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) [2023-08-30 20:13:17,358 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 123 flow. Second operand 4 states and 1134 transitions. [2023-08-30 20:13:17,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 76 transitions, 355 flow [2023-08-30 20:13:17,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 76 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:13:17,360 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 140 flow [2023-08-30 20:13:17,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-08-30 20:13:17,361 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-08-30 20:13:17,361 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 140 flow [2023-08-30 20:13:17,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.75) internal successors, (1087), 4 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:17,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:17,362 INFO L208 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] [2023-08-30 20:13:17,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:13:17,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:17,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:17,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1954963629, now seen corresponding path program 1 times [2023-08-30 20:13:17,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:17,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017440645] [2023-08-30 20:13:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:17,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:13:17,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:17,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017440645] [2023-08-30 20:13:17,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017440645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:13:17,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:13:17,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:13:17,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128728391] [2023-08-30 20:13:17,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:13:17,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:13:17,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:17,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:13:17,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:13:17,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 644 [2023-08-30 20:13:17,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:17,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:17,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 644 [2023-08-30 20:13:17,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:18,035 INFO L130 PetriNetUnfolder]: 2852/3829 cut-off events. [2023-08-30 20:13:18,035 INFO L131 PetriNetUnfolder]: For 1529/1529 co-relation queries the response was YES. [2023-08-30 20:13:18,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9573 conditions, 3829 events. 2852/3829 cut-off events. For 1529/1529 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14402 event pairs, 765 based on Foata normal form. 140/3965 useless extension candidates. Maximal degree in co-relation 9559. Up to 2698 conditions per place. [2023-08-30 20:13:18,055 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 68 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-30 20:13:18,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 70 transitions, 347 flow [2023-08-30 20:13:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:13:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:13:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-08-30 20:13:18,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46790890269151136 [2023-08-30 20:13:18,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-08-30 20:13:18,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-08-30 20:13:18,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:18,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-08-30 20:13:18,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:18,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:18,065 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:18,066 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 140 flow. Second operand 3 states and 904 transitions. [2023-08-30 20:13:18,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 70 transitions, 347 flow [2023-08-30 20:13:18,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 343 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 20:13:18,069 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 144 flow [2023-08-30 20:13:18,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-30 20:13:18,070 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2023-08-30 20:13:18,070 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 144 flow [2023-08-30 20:13:18,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:18,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:18,071 INFO L208 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] [2023-08-30 20:13:18,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 20:13:18,071 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:18,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:18,072 INFO L85 PathProgramCache]: Analyzing trace with hash -418605730, now seen corresponding path program 1 times [2023-08-30 20:13:18,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:18,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897094877] [2023-08-30 20:13:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:18,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:13:18,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:18,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897094877] [2023-08-30 20:13:18,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897094877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:13:18,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:13:18,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:13:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60130036] [2023-08-30 20:13:18,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:13:18,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:13:18,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:18,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:13:18,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:13:18,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 644 [2023-08-30 20:13:18,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:18,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:18,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 644 [2023-08-30 20:13:18,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:18,819 INFO L130 PetriNetUnfolder]: 2676/3627 cut-off events. [2023-08-30 20:13:18,819 INFO L131 PetriNetUnfolder]: For 1635/1635 co-relation queries the response was YES. [2023-08-30 20:13:18,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9333 conditions, 3627 events. 2676/3627 cut-off events. For 1635/1635 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13554 event pairs, 689 based on Foata normal form. 132/3755 useless extension candidates. Maximal degree in co-relation 9313. Up to 2700 conditions per place. [2023-08-30 20:13:18,838 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 68 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-30 20:13:18,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 353 flow [2023-08-30 20:13:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:13:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:13:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 899 transitions. [2023-08-30 20:13:18,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46532091097308487 [2023-08-30 20:13:18,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 899 transitions. [2023-08-30 20:13:18,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 899 transitions. [2023-08-30 20:13:18,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:18,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 899 transitions. [2023-08-30 20:13:18,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:18,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:18,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:18,849 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 144 flow. Second operand 3 states and 899 transitions. [2023-08-30 20:13:18,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 353 flow [2023-08-30 20:13:18,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 351 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:13:18,854 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 150 flow [2023-08-30 20:13:18,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-30 20:13:18,857 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-30 20:13:18,857 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 150 flow [2023-08-30 20:13:18,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:18,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:18,858 INFO L208 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] [2023-08-30 20:13:18,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 20:13:18,858 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:18,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:18,859 INFO L85 PathProgramCache]: Analyzing trace with hash -354281914, now seen corresponding path program 1 times [2023-08-30 20:13:18,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:18,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926510911] [2023-08-30 20:13:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:18,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:13:19,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:19,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926510911] [2023-08-30 20:13:19,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926510911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:13:19,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:13:19,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:13:19,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423450812] [2023-08-30 20:13:19,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:13:19,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:13:19,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:19,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:13:19,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:13:19,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 644 [2023-08-30 20:13:19,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:19,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:19,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 644 [2023-08-30 20:13:19,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:19,621 INFO L130 PetriNetUnfolder]: 3151/4250 cut-off events. [2023-08-30 20:13:19,621 INFO L131 PetriNetUnfolder]: For 2502/2502 co-relation queries the response was YES. [2023-08-30 20:13:19,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11311 conditions, 4250 events. 3151/4250 cut-off events. For 2502/2502 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 15712 event pairs, 896 based on Foata normal form. 104/4350 useless extension candidates. Maximal degree in co-relation 11289. Up to 2724 conditions per place. [2023-08-30 20:13:19,651 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 61 selfloop transitions, 2 changer transitions 8/71 dead transitions. [2023-08-30 20:13:19,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 361 flow [2023-08-30 20:13:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:13:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:13:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 902 transitions. [2023-08-30 20:13:19,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668737060041408 [2023-08-30 20:13:19,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 902 transitions. [2023-08-30 20:13:19,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 902 transitions. [2023-08-30 20:13:19,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:19,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 902 transitions. [2023-08-30 20:13:19,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.6666666666667) internal successors, (902), 3 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:19,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:19,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:19,661 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 150 flow. Second operand 3 states and 902 transitions. [2023-08-30 20:13:19,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 361 flow [2023-08-30 20:13:19,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:13:19,667 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 156 flow [2023-08-30 20:13:19,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-30 20:13:19,669 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-30 20:13:19,669 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 156 flow [2023-08-30 20:13:19,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:19,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:19,670 INFO L208 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] [2023-08-30 20:13:19,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 20:13:19,670 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:19,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash -556616439, now seen corresponding path program 1 times [2023-08-30 20:13:19,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:19,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411925125] [2023-08-30 20:13:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:19,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:13:19,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:19,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411925125] [2023-08-30 20:13:19,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411925125] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:13:19,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:13:19,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:13:19,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463155691] [2023-08-30 20:13:19,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:13:19,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:13:19,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:19,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:13:19,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:13:20,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 644 [2023-08-30 20:13:20,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:20,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:20,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 644 [2023-08-30 20:13:20,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:20,699 INFO L130 PetriNetUnfolder]: 4217/5773 cut-off events. [2023-08-30 20:13:20,699 INFO L131 PetriNetUnfolder]: For 3607/3607 co-relation queries the response was YES. [2023-08-30 20:13:20,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15544 conditions, 5773 events. 4217/5773 cut-off events. For 3607/3607 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 23145 event pairs, 3251 based on Foata normal form. 80/5846 useless extension candidates. Maximal degree in co-relation 15520. Up to 4248 conditions per place. [2023-08-30 20:13:20,719 INFO L137 encePairwiseOnDemand]: 639/644 looper letters, 44 selfloop transitions, 3 changer transitions 34/81 dead transitions. [2023-08-30 20:13:20,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 81 transitions, 418 flow [2023-08-30 20:13:20,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:13:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:13:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1137 transitions. [2023-08-30 20:13:20,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44138198757763975 [2023-08-30 20:13:20,724 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1137 transitions. [2023-08-30 20:13:20,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1137 transitions. [2023-08-30 20:13:20,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:20,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1137 transitions. [2023-08-30 20:13:20,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:20,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 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) [2023-08-30 20:13:20,734 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 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) [2023-08-30 20:13:20,734 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 156 flow. Second operand 4 states and 1137 transitions. [2023-08-30 20:13:20,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 81 transitions, 418 flow [2023-08-30 20:13:20,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:13:20,738 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 172 flow [2023-08-30 20:13:20,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-08-30 20:13:20,741 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-30 20:13:20,741 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 172 flow [2023-08-30 20:13:20,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:20,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:20,742 INFO L208 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] [2023-08-30 20:13:20,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 20:13:20,743 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:20,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:20,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2129506320, now seen corresponding path program 1 times [2023-08-30 20:13:20,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:20,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768125363] [2023-08-30 20:13:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:20,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 20:13:20,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:20,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768125363] [2023-08-30 20:13:20,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768125363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:13:20,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:13:20,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:13:20,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691582780] [2023-08-30 20:13:20,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:13:20,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:13:20,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:20,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:13:20,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:13:21,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 644 [2023-08-30 20:13:21,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 273.25) internal successors, (1093), 4 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:21,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:21,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 644 [2023-08-30 20:13:21,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:21,606 INFO L130 PetriNetUnfolder]: 3401/4661 cut-off events. [2023-08-30 20:13:21,606 INFO L131 PetriNetUnfolder]: For 3070/3070 co-relation queries the response was YES. [2023-08-30 20:13:21,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12616 conditions, 4661 events. 3401/4661 cut-off events. For 3070/3070 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 18054 event pairs, 2604 based on Foata normal form. 38/4694 useless extension candidates. Maximal degree in co-relation 12587. Up to 4246 conditions per place. [2023-08-30 20:13:21,628 INFO L137 encePairwiseOnDemand]: 639/644 looper letters, 45 selfloop transitions, 3 changer transitions 24/72 dead transitions. [2023-08-30 20:13:21,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 380 flow [2023-08-30 20:13:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:13:21,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:13:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1127 transitions. [2023-08-30 20:13:21,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-08-30 20:13:21,632 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1127 transitions. [2023-08-30 20:13:21,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1127 transitions. [2023-08-30 20:13:21,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:21,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1127 transitions. [2023-08-30 20:13:21,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 281.75) internal successors, (1127), 4 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:21,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 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) [2023-08-30 20:13:21,639 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 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) [2023-08-30 20:13:21,639 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 172 flow. Second operand 4 states and 1127 transitions. [2023-08-30 20:13:21,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 380 flow [2023-08-30 20:13:21,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 72 transitions, 370 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 20:13:21,644 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 180 flow [2023-08-30 20:13:21,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-08-30 20:13:21,645 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-30 20:13:21,645 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 180 flow [2023-08-30 20:13:21,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.25) internal successors, (1093), 4 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:21,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:21,646 INFO L208 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] [2023-08-30 20:13:21,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 20:13:21,647 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:21,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:21,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1842908479, now seen corresponding path program 1 times [2023-08-30 20:13:21,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:21,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538357725] [2023-08-30 20:13:21,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:21,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:21,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:21,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538357725] [2023-08-30 20:13:21,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538357725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:13:21,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:13:21,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:13:21,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285647073] [2023-08-30 20:13:21,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:13:21,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:13:21,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:21,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:13:21,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:13:21,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 644 [2023-08-30 20:13:21,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 273.5) internal successors, (1094), 4 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:21,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:21,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 644 [2023-08-30 20:13:21,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:22,530 INFO L130 PetriNetUnfolder]: 3522/4838 cut-off events. [2023-08-30 20:13:22,530 INFO L131 PetriNetUnfolder]: For 3203/3203 co-relation queries the response was YES. [2023-08-30 20:13:22,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13084 conditions, 4838 events. 3522/4838 cut-off events. For 3203/3203 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 18911 event pairs, 2708 based on Foata normal form. 56/4891 useless extension candidates. Maximal degree in co-relation 13055. Up to 4244 conditions per place. [2023-08-30 20:13:22,551 INFO L137 encePairwiseOnDemand]: 634/644 looper letters, 41 selfloop transitions, 8 changer transitions 25/74 dead transitions. [2023-08-30 20:13:22,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 404 flow [2023-08-30 20:13:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:13:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:13:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1396 transitions. [2023-08-30 20:13:22,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335403726708075 [2023-08-30 20:13:22,557 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1396 transitions. [2023-08-30 20:13:22,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1396 transitions. [2023-08-30 20:13:22,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:22,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1396 transitions. [2023-08-30 20:13:22,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 279.2) internal successors, (1396), 5 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:22,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 644.0) internal successors, (3864), 6 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:22,565 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 644.0) internal successors, (3864), 6 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:22,565 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 180 flow. Second operand 5 states and 1396 transitions. [2023-08-30 20:13:22,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 404 flow [2023-08-30 20:13:22,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 392 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 20:13:22,571 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 202 flow [2023-08-30 20:13:22,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-30 20:13:22,572 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2023-08-30 20:13:22,573 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 202 flow [2023-08-30 20:13:22,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.5) internal successors, (1094), 4 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:22,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:22,574 INFO L208 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] [2023-08-30 20:13:22,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 20:13:22,574 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:22,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:22,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1999596867, now seen corresponding path program 1 times [2023-08-30 20:13:22,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:22,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49370627] [2023-08-30 20:13:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:22,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:13:22,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:22,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49370627] [2023-08-30 20:13:22,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49370627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:13:22,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:13:22,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 20:13:22,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757555271] [2023-08-30 20:13:22,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:13:22,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:13:22,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:22,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:13:22,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:13:22,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 644 [2023-08-30 20:13:22,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:22,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:22,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 644 [2023-08-30 20:13:22,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:23,107 INFO L130 PetriNetUnfolder]: 1883/2543 cut-off events. [2023-08-30 20:13:23,107 INFO L131 PetriNetUnfolder]: For 1868/1868 co-relation queries the response was YES. [2023-08-30 20:13:23,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6966 conditions, 2543 events. 1883/2543 cut-off events. For 1868/1868 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8435 event pairs, 709 based on Foata normal form. 30/2572 useless extension candidates. Maximal degree in co-relation 6933. Up to 2325 conditions per place. [2023-08-30 20:13:23,121 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 51 selfloop transitions, 2 changer transitions 9/62 dead transitions. [2023-08-30 20:13:23,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 62 transitions, 358 flow [2023-08-30 20:13:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:13:23,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:13:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 892 transitions. [2023-08-30 20:13:23,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4616977225672878 [2023-08-30 20:13:23,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 892 transitions. [2023-08-30 20:13:23,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 892 transitions. [2023-08-30 20:13:23,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:23,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 892 transitions. [2023-08-30 20:13:23,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.3333333333333) internal successors, (892), 3 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:23,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:23,130 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 644.0) internal successors, (2576), 4 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:23,130 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 202 flow. Second operand 3 states and 892 transitions. [2023-08-30 20:13:23,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 62 transitions, 358 flow [2023-08-30 20:13:23,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 340 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 20:13:23,135 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 198 flow [2023-08-30 20:13:23,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-08-30 20:13:23,136 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2023-08-30 20:13:23,136 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 198 flow [2023-08-30 20:13:23,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:23,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:23,137 INFO L208 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] [2023-08-30 20:13:23,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 20:13:23,138 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:23,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:23,138 INFO L85 PathProgramCache]: Analyzing trace with hash -852059088, now seen corresponding path program 1 times [2023-08-30 20:13:23,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:23,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710883731] [2023-08-30 20:13:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:23,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:13:23,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:23,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710883731] [2023-08-30 20:13:23,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710883731] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:13:23,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:13:23,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:13:23,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099657023] [2023-08-30 20:13:23,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:13:23,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:13:23,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:23,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:13:23,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:13:23,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 644 [2023-08-30 20:13:23,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 288.25) internal successors, (1153), 4 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:23,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:23,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 644 [2023-08-30 20:13:23,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:24,266 INFO L130 PetriNetUnfolder]: 5057/6765 cut-off events. [2023-08-30 20:13:24,267 INFO L131 PetriNetUnfolder]: For 5355/5355 co-relation queries the response was YES. [2023-08-30 20:13:24,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19325 conditions, 6765 events. 5057/6765 cut-off events. For 5355/5355 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 26305 event pairs, 1639 based on Foata normal form. 198/6962 useless extension candidates. Maximal degree in co-relation 19294. Up to 2697 conditions per place. [2023-08-30 20:13:24,302 INFO L137 encePairwiseOnDemand]: 637/644 looper letters, 89 selfloop transitions, 12 changer transitions 0/101 dead transitions. [2023-08-30 20:13:24,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 578 flow [2023-08-30 20:13:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:13:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:13:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1207 transitions. [2023-08-30 20:13:24,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468555900621118 [2023-08-30 20:13:24,306 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1207 transitions. [2023-08-30 20:13:24,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1207 transitions. [2023-08-30 20:13:24,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:24,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1207 transitions. [2023-08-30 20:13:24,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 301.75) internal successors, (1207), 4 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:24,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 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) [2023-08-30 20:13:24,326 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 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) [2023-08-30 20:13:24,327 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 198 flow. Second operand 4 states and 1207 transitions. [2023-08-30 20:13:24,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 578 flow [2023-08-30 20:13:24,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 101 transitions, 574 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 20:13:24,332 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 294 flow [2023-08-30 20:13:24,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-08-30 20:13:24,333 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 17 predicate places. [2023-08-30 20:13:24,333 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 294 flow [2023-08-30 20:13:24,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 288.25) internal successors, (1153), 4 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:24,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:24,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:13:24,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 20:13:24,334 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:24,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:24,335 INFO L85 PathProgramCache]: Analyzing trace with hash 335744450, now seen corresponding path program 1 times [2023-08-30 20:13:24,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:24,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846928764] [2023-08-30 20:13:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:24,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:24,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:24,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846928764] [2023-08-30 20:13:24,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846928764] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:13:24,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792199952] [2023-08-30 20:13:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:24,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:24,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:13:24,636 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) [2023-08-30 20:13:24,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:13:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:24,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:13:24,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:13:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:13:25,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:13:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 20:13:25,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792199952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:13:25,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:13:25,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 20:13:25,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687658998] [2023-08-30 20:13:25,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:13:25,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:13:25,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:25,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:13:25,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:13:25,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 644 [2023-08-30 20:13:25,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 294 flow. Second operand has 12 states, 12 states have (on average 260.3333333333333) internal successors, (3124), 12 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:25,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:25,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 644 [2023-08-30 20:13:25,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:26,393 INFO L130 PetriNetUnfolder]: 5288/7161 cut-off events. [2023-08-30 20:13:26,393 INFO L131 PetriNetUnfolder]: For 10275/10275 co-relation queries the response was YES. [2023-08-30 20:13:26,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23568 conditions, 7161 events. 5288/7161 cut-off events. For 10275/10275 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 28333 event pairs, 3732 based on Foata normal form. 16/7175 useless extension candidates. Maximal degree in co-relation 22532. Up to 6765 conditions per place. [2023-08-30 20:13:26,442 INFO L137 encePairwiseOnDemand]: 638/644 looper letters, 57 selfloop transitions, 3 changer transitions 45/105 dead transitions. [2023-08-30 20:13:26,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 662 flow [2023-08-30 20:13:26,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:13:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:13:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1617 transitions. [2023-08-30 20:13:26,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41847826086956524 [2023-08-30 20:13:26,447 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1617 transitions. [2023-08-30 20:13:26,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1617 transitions. [2023-08-30 20:13:26,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:26,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1617 transitions. [2023-08-30 20:13:26,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.5) internal successors, (1617), 6 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:26,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 644.0) internal successors, (4508), 7 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:26,456 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 644.0) internal successors, (4508), 7 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:26,456 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 294 flow. Second operand 6 states and 1617 transitions. [2023-08-30 20:13:26,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 662 flow [2023-08-30 20:13:26,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 636 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-30 20:13:26,470 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 294 flow [2023-08-30 20:13:26,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-08-30 20:13:26,471 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2023-08-30 20:13:26,471 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 294 flow [2023-08-30 20:13:26,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 260.3333333333333) internal successors, (3124), 12 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:26,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:26,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:13:26,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 20:13:26,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 20:13:26,679 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:26,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:26,679 INFO L85 PathProgramCache]: Analyzing trace with hash -493373472, now seen corresponding path program 2 times [2023-08-30 20:13:26,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:26,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268935777] [2023-08-30 20:13:26,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:26,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:26,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:26,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268935777] [2023-08-30 20:13:26,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268935777] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:13:26,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197796500] [2023-08-30 20:13:26,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:13:26,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:26,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:13:26,981 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) [2023-08-30 20:13:26,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:13:27,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:13:27,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:13:27,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:13:27,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:13:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:27,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:13:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:27,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197796500] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:13:27,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:13:27,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 20:13:27,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132191433] [2023-08-30 20:13:27,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:13:27,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:13:27,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:27,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:13:27,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:13:27,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 644 [2023-08-30 20:13:27,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 258.8888888888889) internal successors, (4660), 18 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:27,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:27,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 644 [2023-08-30 20:13:27,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:29,055 INFO L130 PetriNetUnfolder]: 5372/7294 cut-off events. [2023-08-30 20:13:29,056 INFO L131 PetriNetUnfolder]: For 8521/8521 co-relation queries the response was YES. [2023-08-30 20:13:29,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23031 conditions, 7294 events. 5372/7294 cut-off events. For 8521/8521 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 28948 event pairs, 3740 based on Foata normal form. 28/7320 useless extension candidates. Maximal degree in co-relation 22993. Up to 6765 conditions per place. [2023-08-30 20:13:29,089 INFO L137 encePairwiseOnDemand]: 638/644 looper letters, 57 selfloop transitions, 4 changer transitions 54/115 dead transitions. [2023-08-30 20:13:29,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 115 transitions, 728 flow [2023-08-30 20:13:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:13:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:13:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2137 transitions. [2023-08-30 20:13:29,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41479037267080743 [2023-08-30 20:13:29,095 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2137 transitions. [2023-08-30 20:13:29,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2137 transitions. [2023-08-30 20:13:29,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:29,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2137 transitions. [2023-08-30 20:13:29,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 267.125) internal successors, (2137), 8 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:29,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 644.0) internal successors, (5796), 9 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:29,105 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 644.0) internal successors, (5796), 9 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:29,106 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 294 flow. Second operand 8 states and 2137 transitions. [2023-08-30 20:13:29,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 115 transitions, 728 flow [2023-08-30 20:13:29,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 115 transitions, 708 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-30 20:13:29,115 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 314 flow [2023-08-30 20:13:29,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2023-08-30 20:13:29,116 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 30 predicate places. [2023-08-30 20:13:29,116 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 314 flow [2023-08-30 20:13:29,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 258.8888888888889) internal successors, (4660), 18 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:29,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:29,118 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:13:29,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:13:29,328 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,SelfDestructingSolverStorable11 [2023-08-30 20:13:29,330 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:29,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:29,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2111651186, now seen corresponding path program 3 times [2023-08-30 20:13:29,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:29,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668147563] [2023-08-30 20:13:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:29,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 20:13:29,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:29,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668147563] [2023-08-30 20:13:29,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668147563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:13:29,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826960147] [2023-08-30 20:13:29,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:13:29,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:29,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:13:29,789 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) [2023-08-30 20:13:29,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:13:30,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:13:30,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:13:30,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:13:30,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:13:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 20:13:30,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:13:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 20:13:30,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826960147] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:13:30,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:13:30,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-08-30 20:13:30,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725464885] [2023-08-30 20:13:30,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:13:30,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:13:30,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:30,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:13:30,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:13:30,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 644 [2023-08-30 20:13:30,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 314 flow. Second operand has 12 states, 12 states have (on average 257.5) internal successors, (3090), 12 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:30,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:30,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 644 [2023-08-30 20:13:30,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:33,285 INFO L130 PetriNetUnfolder]: 18348/25227 cut-off events. [2023-08-30 20:13:33,285 INFO L131 PetriNetUnfolder]: For 40134/40134 co-relation queries the response was YES. [2023-08-30 20:13:33,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82252 conditions, 25227 events. 18348/25227 cut-off events. For 40134/40134 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 126503 event pairs, 6024 based on Foata normal form. 1976/27199 useless extension candidates. Maximal degree in co-relation 82207. Up to 6441 conditions per place. [2023-08-30 20:13:33,418 INFO L137 encePairwiseOnDemand]: 634/644 looper letters, 139 selfloop transitions, 14 changer transitions 161/314 dead transitions. [2023-08-30 20:13:33,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 314 transitions, 2022 flow [2023-08-30 20:13:33,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 20:13:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 20:13:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5525 transitions. [2023-08-30 20:13:33,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4085329784087548 [2023-08-30 20:13:33,431 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5525 transitions. [2023-08-30 20:13:33,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5525 transitions. [2023-08-30 20:13:33,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:33,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5525 transitions. [2023-08-30 20:13:33,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 263.0952380952381) internal successors, (5525), 21 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:33,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 644.0) internal successors, (14168), 22 states have internal predecessors, (14168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:33,593 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 644.0) internal successors, (14168), 22 states have internal predecessors, (14168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:33,593 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 314 flow. Second operand 21 states and 5525 transitions. [2023-08-30 20:13:33,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 314 transitions, 2022 flow [2023-08-30 20:13:33,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 314 transitions, 1930 flow, removed 43 selfloop flow, removed 6 redundant places. [2023-08-30 20:13:33,626 INFO L231 Difference]: Finished difference. Result has 95 places, 67 transitions, 383 flow [2023-08-30 20:13:33,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=383, PETRI_PLACES=95, PETRI_TRANSITIONS=67} [2023-08-30 20:13:33,627 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 49 predicate places. [2023-08-30 20:13:33,627 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 67 transitions, 383 flow [2023-08-30 20:13:33,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 257.5) internal successors, (3090), 12 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:33,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:33,629 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:13:33,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:13:33,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:33,835 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:33,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:33,835 INFO L85 PathProgramCache]: Analyzing trace with hash -990366533, now seen corresponding path program 1 times [2023-08-30 20:13:33,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:33,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196183670] [2023-08-30 20:13:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:33,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 20:13:34,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:34,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196183670] [2023-08-30 20:13:34,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196183670] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:13:34,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:13:34,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:13:34,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039080787] [2023-08-30 20:13:34,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:13:34,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:13:34,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:13:34,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:13:34,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:13:34,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 644 [2023-08-30 20:13:34,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 67 transitions, 383 flow. Second operand has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:34,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:13:34,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 644 [2023-08-30 20:13:34,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:39,639 INFO L130 PetriNetUnfolder]: 37552/50260 cut-off events. [2023-08-30 20:13:39,640 INFO L131 PetriNetUnfolder]: For 133074/133074 co-relation queries the response was YES. [2023-08-30 20:13:39,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179980 conditions, 50260 events. 37552/50260 cut-off events. For 133074/133074 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 246066 event pairs, 12155 based on Foata normal form. 1340/51598 useless extension candidates. Maximal degree in co-relation 179921. Up to 17334 conditions per place. [2023-08-30 20:13:40,138 INFO L137 encePairwiseOnDemand]: 641/644 looper letters, 134 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2023-08-30 20:13:40,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1045 flow [2023-08-30 20:13:40,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:13:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:13:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1207 transitions. [2023-08-30 20:13:40,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468555900621118 [2023-08-30 20:13:40,142 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1207 transitions. [2023-08-30 20:13:40,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1207 transitions. [2023-08-30 20:13:40,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:40,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1207 transitions. [2023-08-30 20:13:40,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 301.75) internal successors, (1207), 4 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:40,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 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) [2023-08-30 20:13:40,149 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 644.0) internal successors, (3220), 5 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) [2023-08-30 20:13:40,149 INFO L175 Difference]: Start difference. First operand has 95 places, 67 transitions, 383 flow. Second operand 4 states and 1207 transitions. [2023-08-30 20:13:40,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1045 flow [2023-08-30 20:13:40,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 139 transitions, 994 flow, removed 19 selfloop flow, removed 9 redundant places. [2023-08-30 20:13:40,286 INFO L231 Difference]: Finished difference. Result has 84 places, 70 transitions, 386 flow [2023-08-30 20:13:40,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=644, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=386, PETRI_PLACES=84, PETRI_TRANSITIONS=70} [2023-08-30 20:13:40,287 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 38 predicate places. [2023-08-30 20:13:40,287 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 70 transitions, 386 flow [2023-08-30 20:13:40,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:40,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:13:40,287 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:13:40,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 20:13:40,288 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:13:40,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:13:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash -156124942, now seen corresponding path program 1 times [2023-08-30 20:13:40,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:13:40,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412068308] [2023-08-30 20:13:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:40,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:13:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:13:48,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:13:48,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412068308] [2023-08-30 20:13:48,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412068308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:13:48,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233910762] [2023-08-30 20:13:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:13:48,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:13:48,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:13:48,806 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) [2023-08-30 20:13:48,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:13:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:13:49,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 133 conjunts are in the unsatisfiable core [2023-08-30 20:13:49,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:13:49,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 20:13:50,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:13:50,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:13:50,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:13:50,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 20:13:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:13:52,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:03,144 WARN L222 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:14:27,492 WARN L222 SmtUtils]: Spent 24.12s on a formula simplification. DAG size of input: 61 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:15:15,883 WARN L222 SmtUtils]: Spent 48.14s on a formula simplification. DAG size of input: 65 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:15:42,105 WARN L222 SmtUtils]: Spent 26.09s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:16:06,388 WARN L222 SmtUtils]: Spent 24.07s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:17:07,042 WARN L222 SmtUtils]: Spent 1.00m on a formula simplification. DAG size of input: 88 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:18:01,469 WARN L222 SmtUtils]: Spent 54.17s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:20:18,468 WARN L222 SmtUtils]: Spent 2.24m on a formula simplification. DAG size of input: 105 DAG size of output: 102 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:21:05,124 WARN L222 SmtUtils]: Spent 46.14s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 20:21:19,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:21:19,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 192 [2023-08-30 20:21:19,864 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:21:19,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 6961241 treesize of output 6694659 [2023-08-30 20:21:27,253 WARN L222 SmtUtils]: Spent 7.38s on a formula simplification. DAG size of input: 3537 DAG size of output: 828 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 20:21:27,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:21:27,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 20027 treesize of output 19619 [2023-08-30 20:21:27,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:21:27,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 19421 treesize of output 14771 [2023-08-30 20:21:28,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:21:28,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 14573 treesize of output 13559 [2023-08-30 20:21:28,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:21:28,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 13361 treesize of output 11135 Killed by 15