./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.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-proofs-counter-add-4-semi-Q67.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 ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 --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 21:22:26,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:22:26,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:22:26,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:22:26,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:22:26,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:22:26,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:22:26,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:22:26,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:22:26,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:22:26,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:22:26,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:22:26,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:22:26,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:22:26,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:22:26,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:22:26,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:22:26,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:22:26,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:22:26,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:22:26,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:22:26,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:22:26,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:22:26,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:22:26,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:22:26,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:22:26,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:22:26,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:22:26,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:22:26,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:22:26,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:22:26,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:22:26,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:22:26,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:22:26,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:22:26,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:22:26,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:22:26,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:22:26,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:22:26,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:22:26,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:22:26,412 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:22:26,448 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:22:26,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:22:26,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:22:26,453 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:22:26,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:22:26,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:22:26,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:22:26,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:22:26,455 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:22:26,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:22:26,456 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:22:26,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:22:26,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:22:26,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:22:26,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:22:26,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:22:26,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:22:26,458 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:22:26,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:22:26,458 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:22:26,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:22:26,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:22:26,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:22:26,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:22:26,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:22:26,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:22:26,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:22:26,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:22:26,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:22:26,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:22:26,460 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:22:26,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:22:26,461 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:22:26,461 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:22:26,461 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:22:26,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:22:26,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:22:26,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:22:26,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:22:26,785 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:22:26,785 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:22:26,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-08-30 21:22:27,973 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:22:28,181 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:22:28,181 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-08-30 21:22:28,187 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f7f0f9bf/576638cec6a54d4ea186ad418af01b11/FLAGbb5ca850a [2023-08-30 21:22:28,200 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f7f0f9bf/576638cec6a54d4ea186ad418af01b11 [2023-08-30 21:22:28,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:22:28,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:22:28,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:22:28,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:22:28,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:22:28,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:22:28" (1/1) ... [2023-08-30 21:22:28,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79862c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28, skipping insertion in model container [2023-08-30 21:22:28,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:22:28" (1/1) ... [2023-08-30 21:22:28,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:22:28,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:22:28,366 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-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2023-08-30 21:22:28,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:22:28,380 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:22:28,398 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-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2023-08-30 21:22:28,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:22:28,406 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:22:28,407 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:22:28,412 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:22:28,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28 WrapperNode [2023-08-30 21:22:28,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:22:28,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:22:28,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:22:28,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:22:28,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28" (1/1) ... [2023-08-30 21:22:28,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28" (1/1) ... [2023-08-30 21:22:28,446 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 137 [2023-08-30 21:22:28,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:22:28,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:22:28,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:22:28,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:22:28,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28" (1/1) ... [2023-08-30 21:22:28,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28" (1/1) ... [2023-08-30 21:22:28,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28" (1/1) ... [2023-08-30 21:22:28,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28" (1/1) ... [2023-08-30 21:22:28,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28" (1/1) ... [2023-08-30 21:22:28,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28" (1/1) ... [2023-08-30 21:22:28,468 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28" (1/1) ... [2023-08-30 21:22:28,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28" (1/1) ... [2023-08-30 21:22:28,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:22:28,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:22:28,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:22:28,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:22:28,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28" (1/1) ... [2023-08-30 21:22:28,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:22:28,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:22:28,513 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 21:22:28,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:22:28,550 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:22:28,550 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:22:28,550 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:22:28,551 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:22:28,551 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 21:22:28,552 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 21:22:28,552 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 21:22:28,552 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 21:22:28,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:22:28,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:22:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:22:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 21:22:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 21:22:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:22:28,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:22:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:22:28,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:22:28,555 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 21:22:28,539 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 21:22:28,705 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:22:28,706 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:22:28,920 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:22:29,013 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:22:29,013 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 21:22:29,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:22:29 BoogieIcfgContainer [2023-08-30 21:22:29,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:22:29,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:22:29,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:22:29,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:22:29,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:22:28" (1/3) ... [2023-08-30 21:22:29,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c38a77c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:22:29, skipping insertion in model container [2023-08-30 21:22:29,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:22:28" (2/3) ... [2023-08-30 21:22:29,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c38a77c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:22:29, skipping insertion in model container [2023-08-30 21:22:29,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:22:29" (3/3) ... [2023-08-30 21:22:29,023 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-08-30 21:22:29,030 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:22:29,049 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:22:29,049 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:22:29,049 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:22:29,146 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 21:22:29,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 128 transitions, 288 flow [2023-08-30 21:22:29,265 INFO L130 PetriNetUnfolder]: 10/124 cut-off events. [2023-08-30 21:22:29,265 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 21:22:29,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 124 events. 10/124 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-30 21:22:29,272 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 128 transitions, 288 flow [2023-08-30 21:22:29,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 112 transitions, 248 flow [2023-08-30 21:22:29,284 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:22:29,302 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 112 transitions, 248 flow [2023-08-30 21:22:29,308 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 112 transitions, 248 flow [2023-08-30 21:22:29,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 112 transitions, 248 flow [2023-08-30 21:22:29,351 INFO L130 PetriNetUnfolder]: 10/112 cut-off events. [2023-08-30 21:22:29,351 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 21:22:29,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 112 events. 10/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-30 21:22:29,355 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224 [2023-08-30 21:22:33,436 INFO L134 LiptonReduction]: Checked pairs total: 1470 [2023-08-30 21:22:33,437 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-30 21:22:33,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:22:33,457 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;@12c54952, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:22:33,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 21:22:33,473 INFO L130 PetriNetUnfolder]: 4/24 cut-off events. [2023-08-30 21:22:33,474 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 21:22:33,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:33,475 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] [2023-08-30 21:22:33,475 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 21:22:33,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:33,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1331677596, now seen corresponding path program 1 times [2023-08-30 21:22:33,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:33,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158645317] [2023-08-30 21:22:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:33,845 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 21:22:33,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:33,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158645317] [2023-08-30 21:22:33,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158645317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:22:33,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:22:33,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 21:22:33,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181524576] [2023-08-30 21:22:33,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:33,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:22:33,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:33,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:22:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:22:33,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 228 [2023-08-30 21:22:33,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 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 21:22:33,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:33,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 228 [2023-08-30 21:22:33,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:34,039 INFO L130 PetriNetUnfolder]: 431/611 cut-off events. [2023-08-30 21:22:34,040 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-30 21:22:34,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 611 events. 431/611 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1720 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 928. Up to 405 conditions per place. [2023-08-30 21:22:34,049 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 39 selfloop transitions, 3 changer transitions 3/45 dead transitions. [2023-08-30 21:22:34,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 225 flow [2023-08-30 21:22:34,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:22:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:22:34,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-08-30 21:22:34,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2023-08-30 21:22:34,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-08-30 21:22:34,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-08-30 21:22:34,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:34,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-08-30 21:22:34,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 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 21:22:34,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 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 21:22:34,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 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 21:22:34,090 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 372 transitions. [2023-08-30 21:22:34,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 225 flow [2023-08-30 21:22:34,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 45 transitions, 195 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 21:22:34,095 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 81 flow [2023-08-30 21:22:34,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2023-08-30 21:22:34,099 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2023-08-30 21:22:34,099 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 81 flow [2023-08-30 21:22:34,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 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 21:22:34,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:34,100 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] [2023-08-30 21:22:34,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:22:34,101 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 21:22:34,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:34,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1009097346, now seen corresponding path program 1 times [2023-08-30 21:22:34,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:34,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770167422] [2023-08-30 21:22:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:34,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:34,329 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 21:22:34,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:34,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770167422] [2023-08-30 21:22:34,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770167422] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:22:34,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:22:34,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:22:34,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860021788] [2023-08-30 21:22:34,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:34,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:22:34,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:34,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:22:34,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:22:34,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2023-08-30 21:22:34,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 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 21:22:34,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:34,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2023-08-30 21:22:34,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:34,516 INFO L130 PetriNetUnfolder]: 395/575 cut-off events. [2023-08-30 21:22:34,516 INFO L131 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2023-08-30 21:22:34,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 575 events. 395/575 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1711 event pairs, 45 based on Foata normal form. 36/611 useless extension candidates. Maximal degree in co-relation 474. Up to 369 conditions per place. [2023-08-30 21:22:34,519 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 33 selfloop transitions, 3 changer transitions 20/56 dead transitions. [2023-08-30 21:22:34,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 56 transitions, 261 flow [2023-08-30 21:22:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:22:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:22:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 450 transitions. [2023-08-30 21:22:34,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934210526315789 [2023-08-30 21:22:34,534 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 450 transitions. [2023-08-30 21:22:34,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 450 transitions. [2023-08-30 21:22:34,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:34,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 450 transitions. [2023-08-30 21:22:34,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 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 21:22:34,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:34,537 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:34,538 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 81 flow. Second operand 4 states and 450 transitions. [2023-08-30 21:22:34,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 56 transitions, 261 flow [2023-08-30 21:22:34,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 56 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:22:34,539 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 91 flow [2023-08-30 21:22:34,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-30 21:22:34,540 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-08-30 21:22:34,540 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 91 flow [2023-08-30 21:22:34,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 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 21:22:34,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:34,541 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] [2023-08-30 21:22:34,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:22:34,541 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 21:22:34,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:34,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1082201917, now seen corresponding path program 1 times [2023-08-30 21:22:34,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:34,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571589743] [2023-08-30 21:22:34,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:34,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:22:34,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:34,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571589743] [2023-08-30 21:22:34,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571589743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:34,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947192995] [2023-08-30 21:22:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:34,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:34,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:22:34,717 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 21:22:34,739 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 21:22:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:34,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:22:34,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:22:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:22:35,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:22:35,132 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 21:22:35,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947192995] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:35,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:22:35,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 9 [2023-08-30 21:22:35,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620046446] [2023-08-30 21:22:35,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:35,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:22:35,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:22:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-08-30 21:22:35,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 228 [2023-08-30 21:22:35,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 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 21:22:35,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:35,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 228 [2023-08-30 21:22:35,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:35,279 INFO L130 PetriNetUnfolder]: 523/722 cut-off events. [2023-08-30 21:22:35,280 INFO L131 PetriNetUnfolder]: For 284/284 co-relation queries the response was YES. [2023-08-30 21:22:35,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1949 conditions, 722 events. 523/722 cut-off events. For 284/284 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2001 event pairs, 67 based on Foata normal form. 36/758 useless extension candidates. Maximal degree in co-relation 664. Up to 355 conditions per place. [2023-08-30 21:22:35,284 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 56 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-08-30 21:22:35,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 62 transitions, 315 flow [2023-08-30 21:22:35,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:22:35,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:22:35,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 458 transitions. [2023-08-30 21:22:35,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021929824561403 [2023-08-30 21:22:35,287 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 458 transitions. [2023-08-30 21:22:35,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 458 transitions. [2023-08-30 21:22:35,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:35,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 458 transitions. [2023-08-30 21:22:35,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 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 21:22:35,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:35,291 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:35,291 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 91 flow. Second operand 4 states and 458 transitions. [2023-08-30 21:22:35,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 62 transitions, 315 flow [2023-08-30 21:22:35,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 62 transitions, 305 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 21:22:35,294 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 120 flow [2023-08-30 21:22:35,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-08-30 21:22:35,295 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-08-30 21:22:35,295 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 120 flow [2023-08-30 21:22:35,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 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 21:22:35,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:35,296 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] [2023-08-30 21:22:35,309 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 21:22:35,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:35,503 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 21:22:35,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:35,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1640393862, now seen corresponding path program 2 times [2023-08-30 21:22:35,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:35,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335336692] [2023-08-30 21:22:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:35,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:22:35,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335336692] [2023-08-30 21:22:35,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335336692] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:35,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328624728] [2023-08-30 21:22:35,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:22:35,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:35,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:22:35,724 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 21:22:35,734 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 21:22:35,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:22:35,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:22:35,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:22:35,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:22:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:22:35,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:22:35,995 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 21:22:35,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328624728] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:35,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:22:35,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2023-08-30 21:22:35,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733028817] [2023-08-30 21:22:35,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:35,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:22:35,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:22:36,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 21:22:36,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 228 [2023-08-30 21:22:36,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 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 21:22:36,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:36,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 228 [2023-08-30 21:22:36,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:36,182 INFO L130 PetriNetUnfolder]: 683/948 cut-off events. [2023-08-30 21:22:36,182 INFO L131 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2023-08-30 21:22:36,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2839 conditions, 948 events. 683/948 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2865 event pairs, 99 based on Foata normal form. 24/972 useless extension candidates. Maximal degree in co-relation 1006. Up to 589 conditions per place. [2023-08-30 21:22:36,188 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 55 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2023-08-30 21:22:36,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 61 transitions, 337 flow [2023-08-30 21:22:36,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:22:36,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:22:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 454 transitions. [2023-08-30 21:22:36,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49780701754385964 [2023-08-30 21:22:36,190 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 454 transitions. [2023-08-30 21:22:36,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 454 transitions. [2023-08-30 21:22:36,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:36,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 454 transitions. [2023-08-30 21:22:36,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:22:36,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:36,194 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:36,194 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 120 flow. Second operand 4 states and 454 transitions. [2023-08-30 21:22:36,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 61 transitions, 337 flow [2023-08-30 21:22:36,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 61 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 21:22:36,197 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 159 flow [2023-08-30 21:22:36,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-30 21:22:36,198 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-08-30 21:22:36,198 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 159 flow [2023-08-30 21:22:36,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 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 21:22:36,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:36,199 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] [2023-08-30 21:22:36,205 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 21:22:36,404 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,SelfDestructingSolverStorable3 [2023-08-30 21:22:36,404 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 21:22:36,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:36,405 INFO L85 PathProgramCache]: Analyzing trace with hash -144285389, now seen corresponding path program 1 times [2023-08-30 21:22:36,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:36,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911664514] [2023-08-30 21:22:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:36,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:22:36,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:36,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911664514] [2023-08-30 21:22:36,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911664514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:36,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594133813] [2023-08-30 21:22:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:36,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:36,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:22:36,593 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 21:22:36,619 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 21:22:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:36,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:22:36,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:22:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:22:36,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:22:36,877 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 21:22:36,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594133813] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:36,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:22:36,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 9 [2023-08-30 21:22:36,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935419456] [2023-08-30 21:22:36,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:36,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:22:36,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:36,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:22:36,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-08-30 21:22:36,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 228 [2023-08-30 21:22:36,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 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 21:22:36,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:36,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 228 [2023-08-30 21:22:36,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:37,097 INFO L130 PetriNetUnfolder]: 1401/1990 cut-off events. [2023-08-30 21:22:37,097 INFO L131 PetriNetUnfolder]: For 2927/2927 co-relation queries the response was YES. [2023-08-30 21:22:37,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6439 conditions, 1990 events. 1401/1990 cut-off events. For 2927/2927 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7418 event pairs, 239 based on Foata normal form. 82/2072 useless extension candidates. Maximal degree in co-relation 3337. Up to 875 conditions per place. [2023-08-30 21:22:37,109 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 71 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2023-08-30 21:22:37,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 78 transitions, 500 flow [2023-08-30 21:22:37,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:22:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:22:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 460 transitions. [2023-08-30 21:22:37,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043859649122807 [2023-08-30 21:22:37,112 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 460 transitions. [2023-08-30 21:22:37,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 460 transitions. [2023-08-30 21:22:37,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:37,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 460 transitions. [2023-08-30 21:22:37,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 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 21:22:37,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:37,116 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:37,116 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 159 flow. Second operand 4 states and 460 transitions. [2023-08-30 21:22:37,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 78 transitions, 500 flow [2023-08-30 21:22:37,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 78 transitions, 492 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-30 21:22:37,120 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 222 flow [2023-08-30 21:22:37,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-08-30 21:22:37,121 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2023-08-30 21:22:37,121 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 222 flow [2023-08-30 21:22:37,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 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 21:22:37,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:37,122 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] [2023-08-30 21:22:37,131 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 21:22:37,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:37,328 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 21:22:37,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:37,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1646860855, now seen corresponding path program 2 times [2023-08-30 21:22:37,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:37,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193264965] [2023-08-30 21:22:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:37,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:37,453 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 21:22:37,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:37,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193264965] [2023-08-30 21:22:37,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193264965] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:22:37,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:22:37,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:22:37,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954576759] [2023-08-30 21:22:37,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:37,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:22:37,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:37,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:22:37,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:22:37,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2023-08-30 21:22:37,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 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 21:22:37,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:37,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2023-08-30 21:22:37,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:37,729 INFO L130 PetriNetUnfolder]: 1509/2138 cut-off events. [2023-08-30 21:22:37,729 INFO L131 PetriNetUnfolder]: For 5068/5068 co-relation queries the response was YES. [2023-08-30 21:22:37,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7652 conditions, 2138 events. 1509/2138 cut-off events. For 5068/5068 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8000 event pairs, 525 based on Foata normal form. 28/2166 useless extension candidates. Maximal degree in co-relation 3621. Up to 1983 conditions per place. [2023-08-30 21:22:37,742 INFO L137 encePairwiseOnDemand]: 224/228 looper letters, 48 selfloop transitions, 5 changer transitions 12/65 dead transitions. [2023-08-30 21:22:37,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 476 flow [2023-08-30 21:22:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:22:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:22:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 441 transitions. [2023-08-30 21:22:37,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48355263157894735 [2023-08-30 21:22:37,744 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 441 transitions. [2023-08-30 21:22:37,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 441 transitions. [2023-08-30 21:22:37,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:37,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 441 transitions. [2023-08-30 21:22:37,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 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 21:22:37,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:37,747 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:37,747 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 222 flow. Second operand 4 states and 441 transitions. [2023-08-30 21:22:37,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 476 flow [2023-08-30 21:22:37,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 21:22:37,752 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 271 flow [2023-08-30 21:22:37,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-08-30 21:22:37,753 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 16 predicate places. [2023-08-30 21:22:37,753 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 271 flow [2023-08-30 21:22:37,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 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 21:22:37,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:37,754 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] [2023-08-30 21:22:37,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 21:22:37,754 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 21:22:37,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:37,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2073240921, now seen corresponding path program 3 times [2023-08-30 21:22:37,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:37,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735789219] [2023-08-30 21:22:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:37,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:37,861 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 21:22:37,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:37,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735789219] [2023-08-30 21:22:37,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735789219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:22:37,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:22:37,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 21:22:37,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23421516] [2023-08-30 21:22:37,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:37,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:22:37,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:37,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:22:37,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:22:37,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2023-08-30 21:22:37,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 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 21:22:37,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:37,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2023-08-30 21:22:37,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:38,116 INFO L130 PetriNetUnfolder]: 1295/1808 cut-off events. [2023-08-30 21:22:38,116 INFO L131 PetriNetUnfolder]: For 5078/5078 co-relation queries the response was YES. [2023-08-30 21:22:38,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7044 conditions, 1808 events. 1295/1808 cut-off events. For 5078/5078 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6162 event pairs, 484 based on Foata normal form. 14/1822 useless extension candidates. Maximal degree in co-relation 6790. Up to 1683 conditions per place. [2023-08-30 21:22:38,129 INFO L137 encePairwiseOnDemand]: 224/228 looper letters, 49 selfloop transitions, 5 changer transitions 8/62 dead transitions. [2023-08-30 21:22:38,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 62 transitions, 495 flow [2023-08-30 21:22:38,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:22:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:22:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 437 transitions. [2023-08-30 21:22:38,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-08-30 21:22:38,132 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 437 transitions. [2023-08-30 21:22:38,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 437 transitions. [2023-08-30 21:22:38,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:38,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 437 transitions. [2023-08-30 21:22:38,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 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 21:22:38,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:38,135 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:38,135 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 271 flow. Second operand 4 states and 437 transitions. [2023-08-30 21:22:38,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 62 transitions, 495 flow [2023-08-30 21:22:38,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 484 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 21:22:38,141 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 289 flow [2023-08-30 21:22:38,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=289, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2023-08-30 21:22:38,142 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-08-30 21:22:38,142 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 289 flow [2023-08-30 21:22:38,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 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 21:22:38,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:38,143 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] [2023-08-30 21:22:38,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 21:22:38,143 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 21:22:38,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:38,144 INFO L85 PathProgramCache]: Analyzing trace with hash -469343912, now seen corresponding path program 1 times [2023-08-30 21:22:38,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:38,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696221414] [2023-08-30 21:22:38,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:38,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:22:38,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:38,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696221414] [2023-08-30 21:22:38,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696221414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:38,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857186649] [2023-08-30 21:22:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:38,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:38,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:22:38,273 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 21:22:38,297 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 21:22:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:38,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 21:22:38,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:22:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:22:38,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:22:38,489 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 21:22:38,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857186649] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:38,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:22:38,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2023-08-30 21:22:38,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435469413] [2023-08-30 21:22:38,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:22:38,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:22:38,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:38,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:22:38,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-08-30 21:22:38,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 228 [2023-08-30 21:22:38,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 289 flow. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:22:38,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:38,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 228 [2023-08-30 21:22:38,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:38,832 INFO L130 PetriNetUnfolder]: 2542/3579 cut-off events. [2023-08-30 21:22:38,832 INFO L131 PetriNetUnfolder]: For 10236/10236 co-relation queries the response was YES. [2023-08-30 21:22:38,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14195 conditions, 3579 events. 2542/3579 cut-off events. For 10236/10236 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15162 event pairs, 368 based on Foata normal form. 168/3747 useless extension candidates. Maximal degree in co-relation 7263. Up to 1913 conditions per place. [2023-08-30 21:22:38,860 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 80 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2023-08-30 21:22:38,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 91 transitions, 733 flow [2023-08-30 21:22:38,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:22:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:22:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 458 transitions. [2023-08-30 21:22:38,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021929824561403 [2023-08-30 21:22:38,862 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 458 transitions. [2023-08-30 21:22:38,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 458 transitions. [2023-08-30 21:22:38,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:38,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 458 transitions. [2023-08-30 21:22:38,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 0 states have call successors, (0), 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 21:22:38,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:38,866 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 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 21:22:38,866 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 289 flow. Second operand 4 states and 458 transitions. [2023-08-30 21:22:38,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 91 transitions, 733 flow [2023-08-30 21:22:38,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 91 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:22:38,872 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 384 flow [2023-08-30 21:22:38,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=384, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-30 21:22:38,872 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-08-30 21:22:38,873 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 384 flow [2023-08-30 21:22:38,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:22:38,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:38,873 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 21:22:38,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 21:22:39,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:39,079 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 21:22:39,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:39,080 INFO L85 PathProgramCache]: Analyzing trace with hash 326712243, now seen corresponding path program 1 times [2023-08-30 21:22:39,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:39,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62786677] [2023-08-30 21:22:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:39,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:22:39,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:39,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62786677] [2023-08-30 21:22:39,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62786677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:39,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292860556] [2023-08-30 21:22:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:39,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:39,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:22:39,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:22:39,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 21:22:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:39,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 21:22:39,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:22:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:22:39,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:22:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:22:39,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292860556] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:22:39,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:22:39,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-30 21:22:39,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749443360] [2023-08-30 21:22:39,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:22:39,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:22:39,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:39,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:22:39,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:22:39,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 228 [2023-08-30 21:22:39,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 384 flow. Second operand has 5 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 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 21:22:39,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:39,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 228 [2023-08-30 21:22:39,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:40,421 INFO L130 PetriNetUnfolder]: 7768/11212 cut-off events. [2023-08-30 21:22:40,421 INFO L131 PetriNetUnfolder]: For 43561/43561 co-relation queries the response was YES. [2023-08-30 21:22:40,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47530 conditions, 11212 events. 7768/11212 cut-off events. For 43561/43561 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 60764 event pairs, 1722 based on Foata normal form. 857/12069 useless extension candidates. Maximal degree in co-relation 25968. Up to 4773 conditions per place. [2023-08-30 21:22:40,547 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 119 selfloop transitions, 45 changer transitions 3/167 dead transitions. [2023-08-30 21:22:40,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 167 transitions, 1571 flow [2023-08-30 21:22:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:22:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:22:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 634 transitions. [2023-08-30 21:22:40,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561403508771929 [2023-08-30 21:22:40,550 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 634 transitions. [2023-08-30 21:22:40,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 634 transitions. [2023-08-30 21:22:40,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:40,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 634 transitions. [2023-08-30 21:22:40,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 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 21:22:40,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 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 21:22:40,555 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 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 21:22:40,555 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 384 flow. Second operand 5 states and 634 transitions. [2023-08-30 21:22:40,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 167 transitions, 1571 flow [2023-08-30 21:22:40,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 167 transitions, 1565 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 21:22:40,580 INFO L231 Difference]: Finished difference. Result has 59 places, 90 transitions, 910 flow [2023-08-30 21:22:40,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=910, PETRI_PLACES=59, PETRI_TRANSITIONS=90} [2023-08-30 21:22:40,581 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 25 predicate places. [2023-08-30 21:22:40,581 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 90 transitions, 910 flow [2023-08-30 21:22:40,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 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 21:22:40,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:40,582 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 21:22:40,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 21:22:40,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:40,787 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 21:22:40,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:40,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1317515386, now seen corresponding path program 2 times [2023-08-30 21:22:40,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:40,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541448648] [2023-08-30 21:22:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:40,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:22:40,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:40,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541448648] [2023-08-30 21:22:40,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541448648] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:40,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003525913] [2023-08-30 21:22:40,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:22:40,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:40,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:22:40,969 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:22:40,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 21:22:41,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:22:41,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:22:41,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 21:22:41,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:22:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:22:41,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:22:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:22:41,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003525913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:22:41,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:22:41,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-08-30 21:22:41,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427911461] [2023-08-30 21:22:41,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:22:41,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 21:22:41,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:41,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 21:22:41,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-08-30 21:22:41,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-30 21:22:41,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 90 transitions, 910 flow. Second operand has 15 states, 15 states have (on average 96.33333333333333) internal successors, (1445), 15 states have internal predecessors, (1445), 0 states have call successors, (0), 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 21:22:41,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:41,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-30 21:22:41,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:45,090 INFO L130 PetriNetUnfolder]: 24571/35096 cut-off events. [2023-08-30 21:22:45,090 INFO L131 PetriNetUnfolder]: For 166298/166298 co-relation queries the response was YES. [2023-08-30 21:22:45,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167227 conditions, 35096 events. 24571/35096 cut-off events. For 166298/166298 co-relation queries the response was YES. Maximal size of possible extension queue 1428. Compared 221645 event pairs, 2602 based on Foata normal form. 5500/40596 useless extension candidates. Maximal degree in co-relation 82340. Up to 16813 conditions per place. [2023-08-30 21:22:45,360 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 746 selfloop transitions, 316 changer transitions 0/1062 dead transitions. [2023-08-30 21:22:45,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 1062 transitions, 10861 flow [2023-08-30 21:22:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:22:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:22:45,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3693 transitions. [2023-08-30 21:22:45,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46278195488721807 [2023-08-30 21:22:45,371 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3693 transitions. [2023-08-30 21:22:45,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3693 transitions. [2023-08-30 21:22:45,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:45,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3693 transitions. [2023-08-30 21:22:45,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 105.51428571428572) internal successors, (3693), 35 states have internal predecessors, (3693), 0 states have call successors, (0), 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 21:22:45,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 228.0) internal successors, (8208), 36 states have internal predecessors, (8208), 0 states have call successors, (0), 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 21:22:45,395 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 228.0) internal successors, (8208), 36 states have internal predecessors, (8208), 0 states have call successors, (0), 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 21:22:45,395 INFO L175 Difference]: Start difference. First operand has 59 places, 90 transitions, 910 flow. Second operand 35 states and 3693 transitions. [2023-08-30 21:22:45,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 1062 transitions, 10861 flow [2023-08-30 21:22:45,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 1062 transitions, 9625 flow, removed 618 selfloop flow, removed 0 redundant places. [2023-08-30 21:22:45,556 INFO L231 Difference]: Finished difference. Result has 122 places, 389 transitions, 4934 flow [2023-08-30 21:22:45,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4934, PETRI_PLACES=122, PETRI_TRANSITIONS=389} [2023-08-30 21:22:45,557 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 88 predicate places. [2023-08-30 21:22:45,557 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 389 transitions, 4934 flow [2023-08-30 21:22:45,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 96.33333333333333) internal successors, (1445), 15 states have internal predecessors, (1445), 0 states have call successors, (0), 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 21:22:45,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:45,558 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 21:22:45,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 21:22:45,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:45,764 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 21:22:45,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:45,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1179486957, now seen corresponding path program 3 times [2023-08-30 21:22:45,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:45,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455142578] [2023-08-30 21:22:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:45,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:22:46,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:46,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455142578] [2023-08-30 21:22:46,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455142578] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:46,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735764592] [2023-08-30 21:22:46,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:22:46,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:46,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:22:46,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:22:46,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 21:22:46,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:22:46,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:22:46,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 21:22:46,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:22:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:22:46,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:22:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:22:46,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735764592] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:22:46,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:22:46,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-30 21:22:46,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056820075] [2023-08-30 21:22:46,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:22:46,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 21:22:46,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:46,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 21:22:46,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-08-30 21:22:46,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 228 [2023-08-30 21:22:46,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 389 transitions, 4934 flow. Second operand has 13 states, 13 states have (on average 99.84615384615384) internal successors, (1298), 13 states have internal predecessors, (1298), 0 states have call successors, (0), 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 21:22:46,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:46,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 228 [2023-08-30 21:22:46,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:22:53,127 INFO L130 PetriNetUnfolder]: 32911/46963 cut-off events. [2023-08-30 21:22:53,128 INFO L131 PetriNetUnfolder]: For 1425468/1425468 co-relation queries the response was YES. [2023-08-30 21:22:53,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371594 conditions, 46963 events. 32911/46963 cut-off events. For 1425468/1425468 co-relation queries the response was YES. Maximal size of possible extension queue 1950. Compared 305920 event pairs, 6160 based on Foata normal form. 1192/48155 useless extension candidates. Maximal degree in co-relation 306181. Up to 18872 conditions per place. [2023-08-30 21:22:53,641 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 659 selfloop transitions, 142 changer transitions 45/846 dead transitions. [2023-08-30 21:22:53,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 846 transitions, 12293 flow [2023-08-30 21:22:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 21:22:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 21:22:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1717 transitions. [2023-08-30 21:22:53,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706688596491228 [2023-08-30 21:22:53,646 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1717 transitions. [2023-08-30 21:22:53,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1717 transitions. [2023-08-30 21:22:53,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:22:53,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1717 transitions. [2023-08-30 21:22:53,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 107.3125) internal successors, (1717), 16 states have internal predecessors, (1717), 0 states have call successors, (0), 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 21:22:53,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 228.0) internal successors, (3876), 17 states have internal predecessors, (3876), 0 states have call successors, (0), 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 21:22:53,655 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 228.0) internal successors, (3876), 17 states have internal predecessors, (3876), 0 states have call successors, (0), 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 21:22:53,655 INFO L175 Difference]: Start difference. First operand has 122 places, 389 transitions, 4934 flow. Second operand 16 states and 1717 transitions. [2023-08-30 21:22:53,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 846 transitions, 12293 flow [2023-08-30 21:22:57,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 846 transitions, 11201 flow, removed 487 selfloop flow, removed 3 redundant places. [2023-08-30 21:22:57,128 INFO L231 Difference]: Finished difference. Result has 140 places, 495 transitions, 6778 flow [2023-08-30 21:22:57,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=4199, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6778, PETRI_PLACES=140, PETRI_TRANSITIONS=495} [2023-08-30 21:22:57,129 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 106 predicate places. [2023-08-30 21:22:57,129 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 495 transitions, 6778 flow [2023-08-30 21:22:57,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 99.84615384615384) internal successors, (1298), 13 states have internal predecessors, (1298), 0 states have call successors, (0), 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 21:22:57,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:22:57,130 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 21:22:57,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 21:22:57,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:57,331 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 21:22:57,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:22:57,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2010129489, now seen corresponding path program 4 times [2023-08-30 21:22:57,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:22:57,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364375222] [2023-08-30 21:22:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:22:57,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:22:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:22:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:22:57,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:22:57,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364375222] [2023-08-30 21:22:57,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364375222] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:22:57,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160859955] [2023-08-30 21:22:57,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:22:57,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:22:57,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:22:57,683 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:22:57,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 21:22:57,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:22:57,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:22:57,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 21:22:57,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:22:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:22:57,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:22:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:22:58,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160859955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:22:58,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:22:58,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2023-08-30 21:22:58,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637093078] [2023-08-30 21:22:58,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:22:58,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 21:22:58,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:22:58,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 21:22:58,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-30 21:22:58,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-30 21:22:58,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 495 transitions, 6778 flow. Second operand has 18 states, 18 states have (on average 95.38888888888889) internal successors, (1717), 18 states have internal predecessors, (1717), 0 states have call successors, (0), 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 21:22:58,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:22:58,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-30 21:22:58,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:23:10,596 INFO L130 PetriNetUnfolder]: 49792/69719 cut-off events. [2023-08-30 21:23:10,596 INFO L131 PetriNetUnfolder]: For 2415001/2415001 co-relation queries the response was YES. [2023-08-30 21:23:11,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599805 conditions, 69719 events. 49792/69719 cut-off events. For 2415001/2415001 co-relation queries the response was YES. Maximal size of possible extension queue 2716. Compared 458008 event pairs, 3954 based on Foata normal form. 1354/71073 useless extension candidates. Maximal degree in co-relation 544874. Up to 23207 conditions per place. [2023-08-30 21:23:11,546 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 1059 selfloop transitions, 579 changer transitions 44/1682 dead transitions. [2023-08-30 21:23:11,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 1682 transitions, 27131 flow [2023-08-30 21:23:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 21:23:11,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 21:23:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3336 transitions. [2023-08-30 21:23:11,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45723684210526316 [2023-08-30 21:23:11,554 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3336 transitions. [2023-08-30 21:23:11,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3336 transitions. [2023-08-30 21:23:11,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:23:11,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3336 transitions. [2023-08-30 21:23:11,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 104.25) internal successors, (3336), 32 states have internal predecessors, (3336), 0 states have call successors, (0), 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 21:23:11,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 228.0) internal successors, (7524), 33 states have internal predecessors, (7524), 0 states have call successors, (0), 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 21:23:11,572 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 228.0) internal successors, (7524), 33 states have internal predecessors, (7524), 0 states have call successors, (0), 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 21:23:11,572 INFO L175 Difference]: Start difference. First operand has 140 places, 495 transitions, 6778 flow. Second operand 32 states and 3336 transitions. [2023-08-30 21:23:11,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 1682 transitions, 27131 flow [2023-08-30 21:23:19,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 1682 transitions, 25141 flow, removed 891 selfloop flow, removed 6 redundant places. [2023-08-30 21:23:19,040 INFO L231 Difference]: Finished difference. Result has 184 places, 954 transitions, 16579 flow [2023-08-30 21:23:19,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=6022, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=16579, PETRI_PLACES=184, PETRI_TRANSITIONS=954} [2023-08-30 21:23:19,041 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 150 predicate places. [2023-08-30 21:23:19,042 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 954 transitions, 16579 flow [2023-08-30 21:23:19,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 95.38888888888889) internal successors, (1717), 18 states have internal predecessors, (1717), 0 states have call successors, (0), 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 21:23:19,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:23:19,043 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 21:23:19,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 21:23:19,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 21:23:19,249 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 21:23:19,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:23:19,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1258277956, now seen corresponding path program 5 times [2023-08-30 21:23:19,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:23:19,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660515506] [2023-08-30 21:23:19,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:23:19,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:23:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:23:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:23:19,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:23:19,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660515506] [2023-08-30 21:23:19,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660515506] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:23:19,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483049077] [2023-08-30 21:23:19,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:23:19,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:23:19,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:23:19,433 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:23:19,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 21:23:19,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:23:19,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:23:19,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 21:23:19,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:23:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:23:19,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:23:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:23:19,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483049077] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:23:19,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:23:19,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-08-30 21:23:19,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534112595] [2023-08-30 21:23:19,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:23:19,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 21:23:19,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:23:19,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 21:23:19,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-08-30 21:23:19,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-30 21:23:19,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 954 transitions, 16579 flow. Second operand has 16 states, 16 states have (on average 96.0625) internal successors, (1537), 16 states have internal predecessors, (1537), 0 states have call successors, (0), 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 21:23:19,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:23:19,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-30 21:23:19,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:23:43,242 INFO L130 PetriNetUnfolder]: 71081/98866 cut-off events. [2023-08-30 21:23:43,242 INFO L131 PetriNetUnfolder]: For 4113218/4113218 co-relation queries the response was YES. [2023-08-30 21:23:44,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923757 conditions, 98866 events. 71081/98866 cut-off events. For 4113218/4113218 co-relation queries the response was YES. Maximal size of possible extension queue 3948. Compared 666810 event pairs, 5286 based on Foata normal form. 5814/104680 useless extension candidates. Maximal degree in co-relation 902438. Up to 37754 conditions per place. [2023-08-30 21:23:45,056 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 1550 selfloop transitions, 941 changer transitions 69/2560 dead transitions. [2023-08-30 21:23:45,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 2560 transitions, 45616 flow [2023-08-30 21:23:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:23:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:23:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3588 transitions. [2023-08-30 21:23:45,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496240601503759 [2023-08-30 21:23:45,061 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3588 transitions. [2023-08-30 21:23:45,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3588 transitions. [2023-08-30 21:23:45,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:23:45,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3588 transitions. [2023-08-30 21:23:45,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 102.51428571428572) internal successors, (3588), 35 states have internal predecessors, (3588), 0 states have call successors, (0), 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 21:23:45,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 228.0) internal successors, (8208), 36 states have internal predecessors, (8208), 0 states have call successors, (0), 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 21:23:45,079 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 228.0) internal successors, (8208), 36 states have internal predecessors, (8208), 0 states have call successors, (0), 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 21:23:45,080 INFO L175 Difference]: Start difference. First operand has 184 places, 954 transitions, 16579 flow. Second operand 35 states and 3588 transitions. [2023-08-30 21:23:45,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 2560 transitions, 45616 flow [2023-08-30 21:24:35,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 2560 transitions, 42900 flow, removed 1308 selfloop flow, removed 3 redundant places. [2023-08-30 21:24:35,364 INFO L231 Difference]: Finished difference. Result has 237 places, 1524 transitions, 28336 flow [2023-08-30 21:24:35,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=14875, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=28336, PETRI_PLACES=237, PETRI_TRANSITIONS=1524} [2023-08-30 21:24:35,365 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 203 predicate places. [2023-08-30 21:24:35,366 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 1524 transitions, 28336 flow [2023-08-30 21:24:35,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 96.0625) internal successors, (1537), 16 states have internal predecessors, (1537), 0 states have call successors, (0), 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 21:24:35,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:24:35,366 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 21:24:35,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 21:24:35,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 21:24:35,575 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 21:24:35,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:24:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash 32477611, now seen corresponding path program 6 times [2023-08-30 21:24:35,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:24:35,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792689739] [2023-08-30 21:24:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:24:35,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:24:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:24:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:24:35,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:24:35,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792689739] [2023-08-30 21:24:35,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792689739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:24:35,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848849235] [2023-08-30 21:24:35,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:24:35,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:24:35,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:24:35,741 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:24:35,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 21:24:35,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:24:35,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:24:35,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 21:24:35,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:24:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:24:35,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:24:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:24:36,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848849235] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:24:36,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:24:36,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-08-30 21:24:36,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142259993] [2023-08-30 21:24:36,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:24:36,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 21:24:36,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:24:36,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 21:24:36,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-30 21:24:36,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 228 [2023-08-30 21:24:36,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 1524 transitions, 28336 flow. Second operand has 15 states, 15 states have (on average 98.6) internal successors, (1479), 15 states have internal predecessors, (1479), 0 states have call successors, (0), 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 21:24:36,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:24:36,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 228 [2023-08-30 21:24:36,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:25:12,753 INFO L130 PetriNetUnfolder]: 79095/110427 cut-off events. [2023-08-30 21:25:12,753 INFO L131 PetriNetUnfolder]: For 6087808/6087808 co-relation queries the response was YES. [2023-08-30 21:25:14,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194751 conditions, 110427 events. 79095/110427 cut-off events. For 6087808/6087808 co-relation queries the response was YES. Maximal size of possible extension queue 4457. Compared 759956 event pairs, 4816 based on Foata normal form. 3678/114105 useless extension candidates. Maximal degree in co-relation 1192728. Up to 37627 conditions per place. [2023-08-30 21:25:15,577 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 1756 selfloop transitions, 924 changer transitions 69/2749 dead transitions. [2023-08-30 21:25:15,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 2749 transitions, 55133 flow [2023-08-30 21:25:15,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 21:25:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 21:25:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4679 transitions. [2023-08-30 21:25:15,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560428849902534 [2023-08-30 21:25:15,583 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4679 transitions. [2023-08-30 21:25:15,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4679 transitions. [2023-08-30 21:25:15,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:25:15,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4679 transitions. [2023-08-30 21:25:15,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 103.97777777777777) internal successors, (4679), 45 states have internal predecessors, (4679), 0 states have call successors, (0), 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 21:25:15,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 228.0) internal successors, (10488), 46 states have internal predecessors, (10488), 0 states have call successors, (0), 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 21:25:15,604 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 228.0) internal successors, (10488), 46 states have internal predecessors, (10488), 0 states have call successors, (0), 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 21:25:15,604 INFO L175 Difference]: Start difference. First operand has 237 places, 1524 transitions, 28336 flow. Second operand 45 states and 4679 transitions. [2023-08-30 21:25:15,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 2749 transitions, 55133 flow [2023-08-30 21:28:54,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 2749 transitions, 50643 flow, removed 1594 selfloop flow, removed 10 redundant places. [2023-08-30 21:28:54,210 INFO L231 Difference]: Finished difference. Result has 285 places, 1800 transitions, 33151 flow [2023-08-30 21:28:54,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=24319, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=846, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=33151, PETRI_PLACES=285, PETRI_TRANSITIONS=1800} [2023-08-30 21:28:54,211 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 251 predicate places. [2023-08-30 21:28:54,211 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1800 transitions, 33151 flow [2023-08-30 21:28:54,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 98.6) internal successors, (1479), 15 states have internal predecessors, (1479), 0 states have call successors, (0), 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 21:28:54,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:28:54,212 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-30 21:28:54,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 21:28:54,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 21:28:54,412 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 21:28:54,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:28:54,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1518250674, now seen corresponding path program 7 times [2023-08-30 21:28:54,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:28:54,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571473483] [2023-08-30 21:28:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:28:54,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:28:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:28:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:28:54,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:28:54,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571473483] [2023-08-30 21:28:54,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571473483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:28:54,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49590515] [2023-08-30 21:28:54,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:28:54,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:28:54,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:28:54,583 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:28:54,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 21:28:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:28:54,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 21:28:54,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:28:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:28:54,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:28:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:28:54,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49590515] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:28:54,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:28:54,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-08-30 21:28:54,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11874168] [2023-08-30 21:28:54,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:28:54,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 21:28:54,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:28:54,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 21:28:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-30 21:28:54,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-30 21:28:54,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1800 transitions, 33151 flow. Second operand has 15 states, 15 states have (on average 95.93333333333334) internal successors, (1439), 15 states have internal predecessors, (1439), 0 states have call successors, (0), 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 21:28:54,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:28:54,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-30 21:28:54,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:29:47,460 INFO L130 PetriNetUnfolder]: 95335/133066 cut-off events. [2023-08-30 21:29:47,460 INFO L131 PetriNetUnfolder]: For 9623872/9623872 co-relation queries the response was YES. [2023-08-30 21:29:50,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1609635 conditions, 133066 events. 95335/133066 cut-off events. For 9623872/9623872 co-relation queries the response was YES. Maximal size of possible extension queue 5500. Compared 937328 event pairs, 10962 based on Foata normal form. 2966/136032 useless extension candidates. Maximal degree in co-relation 1596343. Up to 46129 conditions per place. [2023-08-30 21:29:51,332 INFO L137 encePairwiseOnDemand]: 221/228 looper letters, 2951 selfloop transitions, 1229 changer transitions 161/4341 dead transitions. [2023-08-30 21:29:51,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 4341 transitions, 98097 flow [2023-08-30 21:29:51,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 21:29:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 21:29:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4042 transitions. [2023-08-30 21:29:51,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454565901934323 [2023-08-30 21:29:51,335 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4042 transitions. [2023-08-30 21:29:51,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4042 transitions. [2023-08-30 21:29:51,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:29:51,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4042 transitions. [2023-08-30 21:29:51,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 103.64102564102564) internal successors, (4042), 39 states have internal predecessors, (4042), 0 states have call successors, (0), 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 21:29:51,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 228.0) internal successors, (9120), 40 states have internal predecessors, (9120), 0 states have call successors, (0), 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 21:29:51,351 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 228.0) internal successors, (9120), 40 states have internal predecessors, (9120), 0 states have call successors, (0), 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 21:29:51,351 INFO L175 Difference]: Start difference. First operand has 285 places, 1800 transitions, 33151 flow. Second operand 39 states and 4042 transitions. [2023-08-30 21:29:51,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 4341 transitions, 98097 flow Killed by 15