./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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-bad-commit-1.wvr-bad.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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 13:00:52,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:00:52,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:00:52,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:00:52,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:00:52,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:00:52,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:00:52,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:00:52,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:00:52,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:00:52,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:00:52,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:00:52,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:00:52,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:00:52,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:00:52,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:00:52,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:00:52,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:00:52,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:00:52,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:00:52,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:00:52,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:00:52,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:00:52,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:00:52,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:00:52,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:00:52,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:00:52,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:00:52,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:00:52,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:00:52,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:00:52,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:00:52,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:00:52,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:00:52,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:00:52,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:00:52,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:00:52,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:00:52,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:00:52,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:00:52,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:00:52,332 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:00:52,364 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:00:52,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:00:52,366 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:00:52,366 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:00:52,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:00:52,367 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:00:52,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:00:52,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:00:52,368 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:00:52,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:00:52,369 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:00:52,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:00:52,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:00:52,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:00:52,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:00:52,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:00:52,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:00:52,370 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:00:52,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:00:52,371 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:00:52,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:00:52,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:00:52,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:00:52,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:00:52,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:00:52,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:00:52,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:00:52,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:00:52,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:00:52,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:00:52,373 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:00:52,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:00:52,373 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:00:52,373 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:00:52,374 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:00:52,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:00:52,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:00:52,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:00:52,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:00:52,724 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:00:52,725 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:00:52,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c [2023-09-01 13:00:53,957 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:00:54,171 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:00:54,172 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c [2023-09-01 13:00:54,177 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bc1181c5/9afc451c6b0e456d8898e41455b8e066/FLAG6a6fe9f36 [2023-09-01 13:00:54,186 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bc1181c5/9afc451c6b0e456d8898e41455b8e066 [2023-09-01 13:00:54,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:00:54,189 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:00:54,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:00:54,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:00:54,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:00:54,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:00:54" (1/1) ... [2023-09-01 13:00:54,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39eaa09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54, skipping insertion in model container [2023-09-01 13:00:54,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:00:54" (1/1) ... [2023-09-01 13:00:54,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:00:54,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:00:54,354 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-bad-commit-1.wvr-bad.c[5161,5174] [2023-09-01 13:00:54,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:00:54,370 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:00:54,395 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-bad-commit-1.wvr-bad.c[5161,5174] [2023-09-01 13:00:54,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:00:54,441 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:00:54,441 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:00:54,447 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:00:54,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54 WrapperNode [2023-09-01 13:00:54,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:00:54,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:00:54,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:00:54,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:00:54,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54" (1/1) ... [2023-09-01 13:00:54,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54" (1/1) ... [2023-09-01 13:00:54,525 INFO L138 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 350 [2023-09-01 13:00:54,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:00:54,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:00:54,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:00:54,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:00:54,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54" (1/1) ... [2023-09-01 13:00:54,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54" (1/1) ... [2023-09-01 13:00:54,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54" (1/1) ... [2023-09-01 13:00:54,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54" (1/1) ... [2023-09-01 13:00:54,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54" (1/1) ... [2023-09-01 13:00:54,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54" (1/1) ... [2023-09-01 13:00:54,584 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54" (1/1) ... [2023-09-01 13:00:54,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54" (1/1) ... [2023-09-01 13:00:54,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:00:54,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:00:54,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:00:54,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:00:54,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54" (1/1) ... [2023-09-01 13:00:54,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:00:54,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:00:54,626 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) [2023-09-01 13:00:54,654 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 [2023-09-01 13:00:54,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:00:54,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:00:54,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:00:54,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:00:54,674 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:00:54,675 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:00:54,675 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:00:54,675 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:00:54,675 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 13:00:54,675 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 13:00:54,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:00:54,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:00:54,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:00:54,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:00:54,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:00:54,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:00:54,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:00:54,678 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 13:00:54,806 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:00:54,808 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:00:55,215 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:00:55,391 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:00:55,392 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 13:00:55,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:00:55 BoogieIcfgContainer [2023-09-01 13:00:55,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:00:55,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:00:55,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:00:55,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:00:55,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:00:54" (1/3) ... [2023-09-01 13:00:55,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c155dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:00:55, skipping insertion in model container [2023-09-01 13:00:55,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:00:54" (2/3) ... [2023-09-01 13:00:55,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c155dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:00:55, skipping insertion in model container [2023-09-01 13:00:55,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:00:55" (3/3) ... [2023-09-01 13:00:55,402 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2023-09-01 13:00:55,409 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:00:55,422 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:00:55,423 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:00:55,423 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:00:55,502 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 13:00:55,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 267 transitions, 558 flow [2023-09-01 13:00:55,682 INFO L130 PetriNetUnfolder]: 27/264 cut-off events. [2023-09-01 13:00:55,682 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:00:55,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 264 events. 27/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 183 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 224. Up to 6 conditions per place. [2023-09-01 13:00:55,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 250 places, 267 transitions, 558 flow [2023-09-01 13:00:55,698 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 254 transitions, 526 flow [2023-09-01 13:00:55,701 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:00:55,719 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 254 transitions, 526 flow [2023-09-01 13:00:55,721 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 254 transitions, 526 flow [2023-09-01 13:00:55,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 254 transitions, 526 flow [2023-09-01 13:00:55,777 INFO L130 PetriNetUnfolder]: 27/254 cut-off events. [2023-09-01 13:00:55,778 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:00:55,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 254 events. 27/254 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 182 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 224. Up to 6 conditions per place. [2023-09-01 13:00:55,784 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2023-09-01 13:01:04,519 INFO L134 LiptonReduction]: Checked pairs total: 2578 [2023-09-01 13:01:04,519 INFO L136 LiptonReduction]: Total number of compositions: 277 [2023-09-01 13:01:04,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:01:04,535 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;@2e0a8b04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:01:04,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 13:01:04,541 INFO L130 PetriNetUnfolder]: 6/24 cut-off events. [2023-09-01 13:01:04,542 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 13:01:04,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:01:04,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:01:04,543 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 1 more)] === [2023-09-01 13:01:04,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:01:04,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1084146320, now seen corresponding path program 1 times [2023-09-01 13:01:04,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:01:04,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890353320] [2023-09-01 13:01:04,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:04,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:01:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:01:05,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:01:05,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890353320] [2023-09-01 13:01:05,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890353320] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:01:05,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:01:05,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 13:01:05,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541536915] [2023-09-01 13:01:05,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:01:05,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:01:05,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:01:05,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:01:05,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:01:05,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 544 [2023-09-01 13:01:05,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:05,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:01:05,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 544 [2023-09-01 13:01:05,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:01:05,333 INFO L130 PetriNetUnfolder]: 164/251 cut-off events. [2023-09-01 13:01:05,334 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-09-01 13:01:05,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 251 events. 164/251 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 606 event pairs, 37 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 376. Up to 167 conditions per place. [2023-09-01 13:01:05,336 INFO L137 encePairwiseOnDemand]: 539/544 looper letters, 36 selfloop transitions, 4 changer transitions 1/41 dead transitions. [2023-09-01 13:01:05,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 41 transitions, 197 flow [2023-09-01 13:01:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:01:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:01:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 753 transitions. [2023-09-01 13:01:05,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46139705882352944 [2023-09-01 13:01:05,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 753 transitions. [2023-09-01 13:01:05,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 753 transitions. [2023-09-01 13:01:05,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:01:05,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 753 transitions. [2023-09-01 13:01:05,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:05,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:05,370 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:05,372 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 68 flow. Second operand 3 states and 753 transitions. [2023-09-01 13:01:05,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 41 transitions, 197 flow [2023-09-01 13:01:05,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 41 transitions, 175 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 13:01:05,378 INFO L231 Difference]: Finished difference. Result has 26 places, 28 transitions, 82 flow [2023-09-01 13:01:05,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=28} [2023-09-01 13:01:05,384 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-09-01 13:01:05,384 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 28 transitions, 82 flow [2023-09-01 13:01:05,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:05,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:01:05,387 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] [2023-09-01 13:01:05,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:01:05,388 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 1 more)] === [2023-09-01 13:01:05,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:01:05,389 INFO L85 PathProgramCache]: Analyzing trace with hash 764426050, now seen corresponding path program 1 times [2023-09-01 13:01:05,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:01:05,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142250368] [2023-09-01 13:01:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:05,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:01:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:01:05,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:01:05,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142250368] [2023-09-01 13:01:05,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142250368] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:01:05,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:01:05,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 13:01:05,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917560848] [2023-09-01 13:01:05,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:01:05,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:01:05,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:01:05,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:01:05,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:01:05,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 544 [2023-09-01 13:01:05,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 28 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:05,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:01:05,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 544 [2023-09-01 13:01:05,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:01:05,870 INFO L130 PetriNetUnfolder]: 146/229 cut-off events. [2023-09-01 13:01:05,870 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2023-09-01 13:01:05,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 229 events. 146/229 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 557 event pairs, 37 based on Foata normal form. 14/240 useless extension candidates. Maximal degree in co-relation 175. Up to 145 conditions per place. [2023-09-01 13:01:05,872 INFO L137 encePairwiseOnDemand]: 540/544 looper letters, 34 selfloop transitions, 3 changer transitions 1/38 dead transitions. [2023-09-01 13:01:05,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 179 flow [2023-09-01 13:01:05,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:01:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:01:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 735 transitions. [2023-09-01 13:01:05,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45036764705882354 [2023-09-01 13:01:05,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 735 transitions. [2023-09-01 13:01:05,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 735 transitions. [2023-09-01 13:01:05,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:01:05,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 735 transitions. [2023-09-01 13:01:05,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:05,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:05,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:05,882 INFO L175 Difference]: Start difference. First operand has 26 places, 28 transitions, 82 flow. Second operand 3 states and 735 transitions. [2023-09-01 13:01:05,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 179 flow [2023-09-01 13:01:05,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 38 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 13:01:05,883 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-09-01 13:01:05,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, 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=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-09-01 13:01:05,884 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-09-01 13:01:05,884 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-09-01 13:01:05,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:05,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:01:05,885 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] [2023-09-01 13:01:05,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:01:05,886 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 1 more)] === [2023-09-01 13:01:05,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:01:05,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1012909974, now seen corresponding path program 1 times [2023-09-01 13:01:05,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:01:05,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905122737] [2023-09-01 13:01:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:05,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:01:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:01:06,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:01:06,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905122737] [2023-09-01 13:01:06,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905122737] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:01:06,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:01:06,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:01:06,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162094861] [2023-09-01 13:01:06,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:01:06,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:01:06,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:01:06,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:01:06,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:01:06,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 544 [2023-09-01 13:01:06,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand 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) [2023-09-01 13:01:06,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:01:06,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 544 [2023-09-01 13:01:06,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:01:06,381 INFO L130 PetriNetUnfolder]: 263/429 cut-off events. [2023-09-01 13:01:06,381 INFO L131 PetriNetUnfolder]: For 226/226 co-relation queries the response was YES. [2023-09-01 13:01:06,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1050 conditions, 429 events. 263/429 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1282 event pairs, 174 based on Foata normal form. 28/451 useless extension candidates. Maximal degree in co-relation 350. Up to 230 conditions per place. [2023-09-01 13:01:06,383 INFO L137 encePairwiseOnDemand]: 540/544 looper letters, 48 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-09-01 13:01:06,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 51 transitions, 246 flow [2023-09-01 13:01:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:01:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:01:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 941 transitions. [2023-09-01 13:01:06,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43244485294117646 [2023-09-01 13:01:06,386 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 941 transitions. [2023-09-01 13:01:06,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 941 transitions. [2023-09-01 13:01:06,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:01:06,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 941 transitions. [2023-09-01 13:01:06,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 235.25) internal successors, (941), 4 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:06,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 544.0) internal successors, (2720), 5 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:06,393 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 544.0) internal successors, (2720), 5 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:06,394 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 4 states and 941 transitions. [2023-09-01 13:01:06,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 51 transitions, 246 flow [2023-09-01 13:01:06,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 51 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 13:01:06,396 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 96 flow [2023-09-01 13:01:06,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2023-09-01 13:01:06,396 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-09-01 13:01:06,397 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 96 flow [2023-09-01 13:01:06,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-09-01 13:01:06,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:01:06,397 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] [2023-09-01 13:01:06,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 13:01:06,398 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 1 more)] === [2023-09-01 13:01:06,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:01:06,398 INFO L85 PathProgramCache]: Analyzing trace with hash 305019443, now seen corresponding path program 1 times [2023-09-01 13:01:06,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:01:06,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618931277] [2023-09-01 13:01:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:06,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:01:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:01:06,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:01:06,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618931277] [2023-09-01 13:01:06,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618931277] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:01:06,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:01:06,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:01:06,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088923899] [2023-09-01 13:01:06,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:01:06,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:01:06,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:01:06,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:01:06,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:01:06,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 544 [2023-09-01 13:01:06,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:06,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:01:06,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 544 [2023-09-01 13:01:06,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:01:06,777 INFO L130 PetriNetUnfolder]: 261/441 cut-off events. [2023-09-01 13:01:06,777 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2023-09-01 13:01:06,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1073 conditions, 441 events. 261/441 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1364 event pairs, 114 based on Foata normal form. 44/480 useless extension candidates. Maximal degree in co-relation 884. Up to 253 conditions per place. [2023-09-01 13:01:06,779 INFO L137 encePairwiseOnDemand]: 541/544 looper letters, 49 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-09-01 13:01:06,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 53 transitions, 272 flow [2023-09-01 13:01:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:01:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:01:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 967 transitions. [2023-09-01 13:01:06,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4443933823529412 [2023-09-01 13:01:06,788 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 967 transitions. [2023-09-01 13:01:06,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 967 transitions. [2023-09-01 13:01:06,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:01:06,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 967 transitions. [2023-09-01 13:01:06,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 241.75) internal successors, (967), 4 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:06,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 544.0) internal successors, (2720), 5 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:06,795 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 544.0) internal successors, (2720), 5 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:06,795 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 96 flow. Second operand 4 states and 967 transitions. [2023-09-01 13:01:06,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 53 transitions, 272 flow [2023-09-01 13:01:06,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 53 transitions, 262 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 13:01:06,800 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 104 flow [2023-09-01 13:01:06,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-09-01 13:01:06,801 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-09-01 13:01:06,802 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 104 flow [2023-09-01 13:01:06,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:06,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:01:06,803 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] [2023-09-01 13:01:06,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 13:01:06,803 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 1 more)] === [2023-09-01 13:01:06,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:01:06,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1752549565, now seen corresponding path program 1 times [2023-09-01 13:01:06,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:01:06,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838532576] [2023-09-01 13:01:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:06,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:01:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:01:07,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:01:07,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838532576] [2023-09-01 13:01:07,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838532576] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:01:07,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093747189] [2023-09-01 13:01:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:07,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:01:07,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:01:07,073 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) [2023-09-01 13:01:07,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 13:01:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:07,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 13:01:07,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:01:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:01:07,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:01:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:01:07,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093747189] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:01:07,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:01:07,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 13:01:07,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598407505] [2023-09-01 13:01:07,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:01:07,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:01:07,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:01:07,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:01:07,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-09-01 13:01:07,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 544 [2023-09-01 13:01:07,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 104 flow. Second operand has 7 states, 7 states have (on average 240.0) internal successors, (1680), 7 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:07,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:01:07,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 544 [2023-09-01 13:01:07,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:01:08,037 INFO L130 PetriNetUnfolder]: 270/435 cut-off events. [2023-09-01 13:01:08,037 INFO L131 PetriNetUnfolder]: For 206/206 co-relation queries the response was YES. [2023-09-01 13:01:08,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1129 conditions, 435 events. 270/435 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1355 event pairs, 53 based on Foata normal form. 1/433 useless extension candidates. Maximal degree in co-relation 1108. Up to 281 conditions per place. [2023-09-01 13:01:08,040 INFO L137 encePairwiseOnDemand]: 540/544 looper letters, 42 selfloop transitions, 4 changer transitions 3/49 dead transitions. [2023-09-01 13:01:08,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 256 flow [2023-09-01 13:01:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:01:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:01:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 975 transitions. [2023-09-01 13:01:08,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44806985294117646 [2023-09-01 13:01:08,043 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 975 transitions. [2023-09-01 13:01:08,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 975 transitions. [2023-09-01 13:01:08,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:01:08,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 975 transitions. [2023-09-01 13:01:08,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 243.75) internal successors, (975), 4 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:08,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 544.0) internal successors, (2720), 5 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:08,050 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 544.0) internal successors, (2720), 5 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:08,050 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 104 flow. Second operand 4 states and 975 transitions. [2023-09-01 13:01:08,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 256 flow [2023-09-01 13:01:08,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 49 transitions, 252 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 13:01:08,053 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 129 flow [2023-09-01 13:01:08,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-09-01 13:01:08,056 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-09-01 13:01:08,056 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 129 flow [2023-09-01 13:01:08,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 240.0) internal successors, (1680), 7 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:08,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:01:08,057 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] [2023-09-01 13:01:08,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 13:01:08,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:01:08,269 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 1 more)] === [2023-09-01 13:01:08,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:01:08,270 INFO L85 PathProgramCache]: Analyzing trace with hash 583728145, now seen corresponding path program 2 times [2023-09-01 13:01:08,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:01:08,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648716801] [2023-09-01 13:01:08,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:08,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:01:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:01:08,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:01:08,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648716801] [2023-09-01 13:01:08,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648716801] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:01:08,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494644111] [2023-09-01 13:01:08,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:01:08,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:01:08,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:01:08,689 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) [2023-09-01 13:01:08,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 13:01:08,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:01:08,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:01:08,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 13:01:08,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:01:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:01:09,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:01:09,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:01:09,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 266 treesize of output 272 [2023-09-01 13:01:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:01:10,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494644111] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:01:10,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:01:10,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-09-01 13:01:10,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825335391] [2023-09-01 13:01:10,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:01:10,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 13:01:10,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:01:10,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 13:01:10,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-09-01 13:01:10,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 544 [2023-09-01 13:01:10,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 129 flow. Second operand has 13 states, 13 states have (on average 200.46153846153845) internal successors, (2606), 13 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:10,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:01:10,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 544 [2023-09-01 13:01:10,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:01:10,857 INFO L130 PetriNetUnfolder]: 437/748 cut-off events. [2023-09-01 13:01:10,857 INFO L131 PetriNetUnfolder]: For 580/580 co-relation queries the response was YES. [2023-09-01 13:01:10,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1943 conditions, 748 events. 437/748 cut-off events. For 580/580 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2956 event pairs, 125 based on Foata normal form. 56/798 useless extension candidates. Maximal degree in co-relation 1921. Up to 196 conditions per place. [2023-09-01 13:01:10,862 INFO L137 encePairwiseOnDemand]: 535/544 looper letters, 66 selfloop transitions, 12 changer transitions 21/99 dead transitions. [2023-09-01 13:01:10,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 99 transitions, 516 flow [2023-09-01 13:01:10,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 13:01:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 13:01:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1862 transitions. [2023-09-01 13:01:10,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38031045751633985 [2023-09-01 13:01:10,867 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1862 transitions. [2023-09-01 13:01:10,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1862 transitions. [2023-09-01 13:01:10,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:01:10,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1862 transitions. [2023-09-01 13:01:10,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 206.88888888888889) internal successors, (1862), 9 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:10,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 544.0) internal successors, (5440), 10 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:10,879 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 544.0) internal successors, (5440), 10 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:10,880 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 129 flow. Second operand 9 states and 1862 transitions. [2023-09-01 13:01:10,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 99 transitions, 516 flow [2023-09-01 13:01:10,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 99 transitions, 502 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 13:01:10,883 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 196 flow [2023-09-01 13:01:10,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=196, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-09-01 13:01:10,884 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2023-09-01 13:01:10,884 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 196 flow [2023-09-01 13:01:10,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 200.46153846153845) internal successors, (2606), 13 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:10,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:01:10,886 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] [2023-09-01 13:01:10,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 13:01:11,092 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,SelfDestructingSolverStorable5 [2023-09-01 13:01:11,093 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 1 more)] === [2023-09-01 13:01:11,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:01:11,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1837674817, now seen corresponding path program 1 times [2023-09-01 13:01:11,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:01:11,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196598918] [2023-09-01 13:01:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:11,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:01:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:01:12,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:01:12,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196598918] [2023-09-01 13:01:12,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196598918] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:01:12,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137465595] [2023-09-01 13:01:12,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:12,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:01:12,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:01:12,038 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) [2023-09-01 13:01:12,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 13:01:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:12,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 13:01:12,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:01:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:01:12,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:01:13,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:01:13,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 354 treesize of output 458 [2023-09-01 13:01:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:01:19,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137465595] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:01:19,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:01:19,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-09-01 13:01:19,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114516136] [2023-09-01 13:01:19,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:01:19,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 13:01:19,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:01:19,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 13:01:19,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:01:20,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 544 [2023-09-01 13:01:20,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 196 flow. Second operand has 17 states, 17 states have (on average 187.47058823529412) internal successors, (3187), 17 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:20,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:01:20,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 544 [2023-09-01 13:01:20,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:01:21,469 INFO L130 PetriNetUnfolder]: 980/1656 cut-off events. [2023-09-01 13:01:21,469 INFO L131 PetriNetUnfolder]: For 2039/2039 co-relation queries the response was YES. [2023-09-01 13:01:21,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4768 conditions, 1656 events. 980/1656 cut-off events. For 2039/2039 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8028 event pairs, 222 based on Foata normal form. 6/1660 useless extension candidates. Maximal degree in co-relation 2917. Up to 479 conditions per place. [2023-09-01 13:01:21,477 INFO L137 encePairwiseOnDemand]: 537/544 looper letters, 76 selfloop transitions, 28 changer transitions 29/133 dead transitions. [2023-09-01 13:01:21,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 133 transitions, 829 flow [2023-09-01 13:01:21,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:01:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:01:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2326 transitions. [2023-09-01 13:01:21,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35631127450980393 [2023-09-01 13:01:21,484 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2326 transitions. [2023-09-01 13:01:21,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2326 transitions. [2023-09-01 13:01:21,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:01:21,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2326 transitions. [2023-09-01 13:01:21,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 193.83333333333334) internal successors, (2326), 12 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:21,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 544.0) internal successors, (7072), 13 states have internal predecessors, (7072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:21,499 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 544.0) internal successors, (7072), 13 states have internal predecessors, (7072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:21,499 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 196 flow. Second operand 12 states and 2326 transitions. [2023-09-01 13:01:21,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 133 transitions, 829 flow [2023-09-01 13:01:21,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 133 transitions, 817 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 13:01:21,505 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 454 flow [2023-09-01 13:01:21,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=454, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2023-09-01 13:01:21,505 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-09-01 13:01:21,505 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 454 flow [2023-09-01 13:01:21,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 187.47058823529412) internal successors, (3187), 17 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:21,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:01:21,507 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] [2023-09-01 13:01:21,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 13:01:21,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:01:21,713 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 1 more)] === [2023-09-01 13:01:21,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:01:21,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1641038422, now seen corresponding path program 1 times [2023-09-01 13:01:21,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:01:21,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459950248] [2023-09-01 13:01:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:21,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:01:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:01:22,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:01:22,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459950248] [2023-09-01 13:01:22,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459950248] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:01:22,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673638135] [2023-09-01 13:01:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:22,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:01:22,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:01:22,081 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) [2023-09-01 13:01:22,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 13:01:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:22,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 13:01:22,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:01:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:01:22,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:01:23,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:01:23,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 505 treesize of output 536 [2023-09-01 13:01:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:01:24,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673638135] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:01:24,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:01:24,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2023-09-01 13:01:24,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917617965] [2023-09-01 13:01:24,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:01:24,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 13:01:24,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:01:24,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 13:01:24,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-09-01 13:01:24,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 544 [2023-09-01 13:01:24,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 454 flow. Second operand has 11 states, 11 states have (on average 210.0) internal successors, (2310), 11 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:24,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:01:24,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 544 [2023-09-01 13:01:24,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:01:24,926 INFO L130 PetriNetUnfolder]: 980/1686 cut-off events. [2023-09-01 13:01:24,927 INFO L131 PetriNetUnfolder]: For 3197/3197 co-relation queries the response was YES. [2023-09-01 13:01:24,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5207 conditions, 1686 events. 980/1686 cut-off events. For 3197/3197 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8328 event pairs, 270 based on Foata normal form. 60/1744 useless extension candidates. Maximal degree in co-relation 4593. Up to 537 conditions per place. [2023-09-01 13:01:24,948 INFO L137 encePairwiseOnDemand]: 540/544 looper letters, 57 selfloop transitions, 14 changer transitions 13/84 dead transitions. [2023-09-01 13:01:24,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 671 flow [2023-09-01 13:01:24,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:01:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:01:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1083 transitions. [2023-09-01 13:01:24,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981617647058823 [2023-09-01 13:01:24,952 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1083 transitions. [2023-09-01 13:01:24,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1083 transitions. [2023-09-01 13:01:24,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:01:24,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1083 transitions. [2023-09-01 13:01:24,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 216.6) internal successors, (1083), 5 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:24,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:24,959 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:24,959 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 454 flow. Second operand 5 states and 1083 transitions. [2023-09-01 13:01:24,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 671 flow [2023-09-01 13:01:24,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 84 transitions, 601 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-09-01 13:01:24,965 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 385 flow [2023-09-01 13:01:24,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=385, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2023-09-01 13:01:24,966 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2023-09-01 13:01:24,966 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 385 flow [2023-09-01 13:01:24,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 210.0) internal successors, (2310), 11 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:24,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:01:24,968 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:01:24,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 13:01:25,173 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 [2023-09-01 13:01:25,174 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 1 more)] === [2023-09-01 13:01:25,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:01:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash 704380673, now seen corresponding path program 2 times [2023-09-01 13:01:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:01:25,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61710763] [2023-09-01 13:01:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:25,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:01:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:01:25,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:01:25,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61710763] [2023-09-01 13:01:25,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61710763] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:01:25,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781670054] [2023-09-01 13:01:25,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:01:25,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:01:25,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:01:25,707 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) [2023-09-01 13:01:25,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 13:01:25,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:01:25,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:01:25,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 13:01:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:01:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:01:26,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:01:27,178 INFO L321 Elim1Store]: treesize reduction 38, result has 77.5 percent of original size [2023-09-01 13:01:27,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 550 treesize of output 600 [2023-09-01 13:01:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:01:28,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781670054] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:01:28,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:01:28,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2023-09-01 13:01:28,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694095952] [2023-09-01 13:01:28,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:01:28,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 13:01:28,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:01:28,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 13:01:28,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:01:28,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 544 [2023-09-01 13:01:28,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 385 flow. Second operand has 14 states, 14 states have (on average 185.85714285714286) internal successors, (2602), 14 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:28,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:01:28,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 544 [2023-09-01 13:01:28,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:01:29,667 INFO L130 PetriNetUnfolder]: 1766/3030 cut-off events. [2023-09-01 13:01:29,667 INFO L131 PetriNetUnfolder]: For 5585/5585 co-relation queries the response was YES. [2023-09-01 13:01:29,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9177 conditions, 3030 events. 1766/3030 cut-off events. For 5585/5585 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16713 event pairs, 384 based on Foata normal form. 72/3100 useless extension candidates. Maximal degree in co-relation 7922. Up to 546 conditions per place. [2023-09-01 13:01:29,681 INFO L137 encePairwiseOnDemand]: 534/544 looper letters, 93 selfloop transitions, 34 changer transitions 64/191 dead transitions. [2023-09-01 13:01:29,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 191 transitions, 1307 flow [2023-09-01 13:01:29,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 13:01:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 13:01:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3439 transitions. [2023-09-01 13:01:29,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3512050653594771 [2023-09-01 13:01:29,691 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3439 transitions. [2023-09-01 13:01:29,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3439 transitions. [2023-09-01 13:01:29,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:01:29,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3439 transitions. [2023-09-01 13:01:29,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 191.05555555555554) internal successors, (3439), 18 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:29,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 544.0) internal successors, (10336), 19 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:29,711 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 544.0) internal successors, (10336), 19 states have internal predecessors, (10336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:29,712 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 385 flow. Second operand 18 states and 3439 transitions. [2023-09-01 13:01:29,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 191 transitions, 1307 flow [2023-09-01 13:01:29,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 191 transitions, 1273 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 13:01:29,728 INFO L231 Difference]: Finished difference. Result has 77 places, 67 transitions, 589 flow [2023-09-01 13:01:29,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=589, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2023-09-01 13:01:29,729 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2023-09-01 13:01:29,729 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 589 flow [2023-09-01 13:01:29,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 185.85714285714286) internal successors, (2602), 14 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:29,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:01:29,730 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] [2023-09-01 13:01:29,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 13:01:29,937 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 [2023-09-01 13:01:29,937 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 1 more)] === [2023-09-01 13:01:29,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:01:29,938 INFO L85 PathProgramCache]: Analyzing trace with hash 712731656, now seen corresponding path program 1 times [2023-09-01 13:01:29,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:01:29,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412237366] [2023-09-01 13:01:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:29,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:01:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:01:30,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:01:30,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412237366] [2023-09-01 13:01:30,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412237366] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:01:30,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716935003] [2023-09-01 13:01:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:30,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:01:30,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:01:30,369 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) [2023-09-01 13:01:30,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 13:01:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:30,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 13:01:30,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:01:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:01:31,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:01:32,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:01:32,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 399 treesize of output 506 [2023-09-01 13:01:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:01:34,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716935003] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:01:34,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:01:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-09-01 13:01:34,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93118705] [2023-09-01 13:01:34,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:01:34,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:01:34,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:01:34,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:01:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:01:34,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 544 [2023-09-01 13:01:34,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 589 flow. Second operand has 16 states, 16 states have (on average 190.125) internal successors, (3042), 16 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:34,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:01:34,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 544 [2023-09-01 13:01:34,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:01:35,651 INFO L130 PetriNetUnfolder]: 1822/3231 cut-off events. [2023-09-01 13:01:35,651 INFO L131 PetriNetUnfolder]: For 8771/8771 co-relation queries the response was YES. [2023-09-01 13:01:35,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9861 conditions, 3231 events. 1822/3231 cut-off events. For 8771/8771 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19039 event pairs, 414 based on Foata normal form. 196/3427 useless extension candidates. Maximal degree in co-relation 8393. Up to 602 conditions per place. [2023-09-01 13:01:35,663 INFO L137 encePairwiseOnDemand]: 538/544 looper letters, 96 selfloop transitions, 28 changer transitions 48/172 dead transitions. [2023-09-01 13:01:35,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 172 transitions, 1342 flow [2023-09-01 13:01:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:01:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:01:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2555 transitions. [2023-09-01 13:01:35,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3612839366515837 [2023-09-01 13:01:35,670 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2555 transitions. [2023-09-01 13:01:35,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2555 transitions. [2023-09-01 13:01:35,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:01:35,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2555 transitions. [2023-09-01 13:01:35,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 196.53846153846155) internal successors, (2555), 13 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:35,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 544.0) internal successors, (7616), 14 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:35,685 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 544.0) internal successors, (7616), 14 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:35,685 INFO L175 Difference]: Start difference. First operand has 77 places, 67 transitions, 589 flow. Second operand 13 states and 2555 transitions. [2023-09-01 13:01:35,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 172 transitions, 1342 flow [2023-09-01 13:01:35,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 172 transitions, 1220 flow, removed 37 selfloop flow, removed 9 redundant places. [2023-09-01 13:01:35,736 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 525 flow [2023-09-01 13:01:35,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=525, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2023-09-01 13:01:35,737 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 51 predicate places. [2023-09-01 13:01:35,737 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 525 flow [2023-09-01 13:01:35,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 190.125) internal successors, (3042), 16 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:35,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:01:35,738 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:01:35,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 13:01:35,944 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 [2023-09-01 13:01:35,944 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 1 more)] === [2023-09-01 13:01:35,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:01:35,945 INFO L85 PathProgramCache]: Analyzing trace with hash 998744017, now seen corresponding path program 1 times [2023-09-01 13:01:35,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:01:35,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817752618] [2023-09-01 13:01:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:35,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:01:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:01:38,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:01:38,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817752618] [2023-09-01 13:01:38,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817752618] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:01:38,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863145075] [2023-09-01 13:01:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:38,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:01:38,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:01:38,607 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) [2023-09-01 13:01:38,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 13:01:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:38,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 13:01:38,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:01:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:01:39,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:01:41,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:01:41,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 410 treesize of output 581 [2023-09-01 13:01:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:01:44,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863145075] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:01:44,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:01:44,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 17 [2023-09-01 13:01:44,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861857649] [2023-09-01 13:01:44,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:01:44,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 13:01:44,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:01:44,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 13:01:44,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-09-01 13:01:46,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 544 [2023-09-01 13:01:46,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 525 flow. Second operand has 19 states, 19 states have (on average 180.89473684210526) internal successors, (3437), 19 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:46,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:01:46,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 544 [2023-09-01 13:01:46,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:01:48,122 INFO L130 PetriNetUnfolder]: 1834/3147 cut-off events. [2023-09-01 13:01:48,122 INFO L131 PetriNetUnfolder]: For 6399/6399 co-relation queries the response was YES. [2023-09-01 13:01:48,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9956 conditions, 3147 events. 1834/3147 cut-off events. For 6399/6399 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17578 event pairs, 293 based on Foata normal form. 9/3156 useless extension candidates. Maximal degree in co-relation 8225. Up to 847 conditions per place. [2023-09-01 13:01:48,140 INFO L137 encePairwiseOnDemand]: 534/544 looper letters, 75 selfloop transitions, 51 changer transitions 43/169 dead transitions. [2023-09-01 13:01:48,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 169 transitions, 1303 flow [2023-09-01 13:01:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 13:01:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 13:01:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3150 transitions. [2023-09-01 13:01:48,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3406141868512111 [2023-09-01 13:01:48,150 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3150 transitions. [2023-09-01 13:01:48,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3150 transitions. [2023-09-01 13:01:48,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:01:48,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3150 transitions. [2023-09-01 13:01:48,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 185.2941176470588) internal successors, (3150), 17 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:48,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 544.0) internal successors, (9792), 18 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:48,169 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 544.0) internal successors, (9792), 18 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:48,169 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 525 flow. Second operand 17 states and 3150 transitions. [2023-09-01 13:01:48,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 169 transitions, 1303 flow [2023-09-01 13:01:48,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 169 transitions, 1247 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-09-01 13:01:48,185 INFO L231 Difference]: Finished difference. Result has 93 places, 81 transitions, 850 flow [2023-09-01 13:01:48,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=850, PETRI_PLACES=93, PETRI_TRANSITIONS=81} [2023-09-01 13:01:48,186 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2023-09-01 13:01:48,186 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 81 transitions, 850 flow [2023-09-01 13:01:48,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 180.89473684210526) internal successors, (3437), 19 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:48,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:01:48,187 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] [2023-09-01 13:01:48,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 13:01:48,392 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 [2023-09-01 13:01:48,393 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 1 more)] === [2023-09-01 13:01:48,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:01:48,393 INFO L85 PathProgramCache]: Analyzing trace with hash -230445003, now seen corresponding path program 1 times [2023-09-01 13:01:48,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:01:48,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258335873] [2023-09-01 13:01:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:48,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:01:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:01:49,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:01:49,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258335873] [2023-09-01 13:01:49,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258335873] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:01:49,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106134098] [2023-09-01 13:01:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:49,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:01:49,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:01:49,893 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) [2023-09-01 13:01:49,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 13:01:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:50,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 13:01:50,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:01:50,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 13:01:50,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:01:50,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:01:50,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:01:50,948 INFO L321 Elim1Store]: treesize reduction 45, result has 53.6 percent of original size [2023-09-01 13:01:50,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 125 treesize of output 104 [2023-09-01 13:01:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:01:50,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:02:20,951 WARN L222 SmtUtils]: Spent 26.51s on a formula simplification. DAG size of input: 119 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:02:26,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:02:26,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 51 [2023-09-01 13:02:26,934 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-09-01 13:02:26,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6774 treesize of output 6246 [2023-09-01 13:02:27,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:02:27,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1550 treesize of output 1463 [2023-09-01 13:02:27,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:02:27,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1446 treesize of output 1255 [2023-09-01 13:02:27,185 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:02:27,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1238 treesize of output 839 [2023-09-01 13:02:28,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:02:28,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2023-09-01 13:02:28,120 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 13:02:28,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 398 treesize of output 369 [2023-09-01 13:02:28,136 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:02:28,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 130 [2023-09-01 13:02:28,143 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:02:28,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2023-09-01 13:02:28,153 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:02:28,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 46 [2023-09-01 13:02:28,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:02:28,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 51 [2023-09-01 13:02:28,236 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-09-01 13:02:28,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6774 treesize of output 6246 [2023-09-01 13:02:28,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:02:28,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1550 treesize of output 1359 [2023-09-01 13:02:28,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:02:28,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1342 treesize of output 1255 [2023-09-01 13:02:28,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:02:28,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1238 treesize of output 839 [2023-09-01 13:02:29,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:02:29,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2023-09-01 13:02:29,125 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 13:02:29,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 181 [2023-09-01 13:02:29,137 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:02:29,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 130 [2023-09-01 13:02:29,146 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:02:29,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 106 [2023-09-01 13:02:29,156 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 13:02:29,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 46 [2023-09-01 13:02:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:02:29,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106134098] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:02:29,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:02:29,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-09-01 13:02:29,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724029811] [2023-09-01 13:02:29,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:02:29,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 13:02:29,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:02:29,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 13:02:29,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=712, Unknown=11, NotChecked=0, Total=870 [2023-09-01 13:02:29,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 544 [2023-09-01 13:02:29,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 81 transitions, 850 flow. Second operand has 30 states, 30 states have (on average 132.5) internal successors, (3975), 30 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:02:29,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:02:29,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 544 [2023-09-01 13:02:29,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:02:33,141 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse34 (= c_~node_state~0 1)) (.cse33 (select |c_#memory_int| c_~manager~0.base)) (.cse30 (select |c_#memory_int| c_~node~0.base)) (.cse32 (+ (* c_~node_front~0 4) c_~node~0.offset)) (.cse5 (= c_~node_state~0 0))) (let ((.cse9 (not .cse5)) (.cse10 (< c_~node_front~0 0)) (.cse11 (<= c_~node_size~0 c_~node_front~0)) (.cse27 (= c_~update~0 (select .cse30 .cse32))) (.cse12 (<= c_~node_back~0 c_~node_front~0)) (.cse35 (not (= (select .cse33 (+ c_~manager~0.offset (* c_~manager_back~0 4))) c_~ok~0))) (.cse36 (<= c_~manager_size~0 c_~manager_back~0)) (.cse38 (not (= (mod c_~safe~0 256) 0))) (.cse37 (not .cse34))) (let ((.cse18 (<= (+ c_~node_back~0 1) c_~node_front~0)) (.cse4 (+ (* c_~node_back~0 4) c_~node~0.offset)) (.cse15 (= c_~manager_state~0 1)) (.cse26 (or .cse35 (< c_~manager_back~0 0) .cse36 .cse38 .cse37)) (.cse22 (or .cse9 .cse10 .cse11 .cse27 .cse12)) (.cse28 (or .cse34 .cse38 .cse5)) (.cse25 (= 2 c_~manager_state~0)) (.cse16 (= c_~manager_state~0 0))) (let ((.cse7 (not .cse16)) (.cse19 (<= c_~manager_back~0 c_~manager_front~0)) (.cse21 (and (or .cse34 .cse5) (or .cse35 .cse36 .cse37))) (.cse20 (select .cse33 (+ (* 4 c_~manager_front~0) c_~manager~0.offset))) (.cse23 (< c_~manager_front~0 0)) (.cse24 (<= c_~manager_size~0 c_~manager_front~0)) (.cse14 (not .cse25)) (.cse1 (and .cse26 .cse22 .cse28)) (.cse0 (= 3 c_~manager_state~0)) (.cse17 (and (or .cse10 .cse11 .cse12) .cse5)) (.cse6 (< c_~node_back~0 0)) (.cse29 (not .cse15)) (.cse8 (<= c_~node_size~0 c_~node_back~0)) (.cse2 (or .cse10 .cse18 (forall ((v_ArrVal_533 (Array Int Int))) (let ((.cse31 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_533) c_~node~0.base))) (= (select .cse31 .cse4) (select .cse31 .cse32))))))) (and (or (not (= (select (select |c_#memory_int| c_~client~0.base) (+ (* c_~client_back~0 4) c_~client~0.offset)) c_~ok~0)) (< c_~client_back~0 0) (not .cse0) .cse1 (<= c_~client_size~0 c_~client_back~0)) (or (and .cse2 (or (forall ((~manager~0.base Int) (v_~manager_front~0_120 Int) (v_ArrVal_533 (Array Int Int)) (~manager~0.offset Int)) (or (< v_~manager_front~0_120 1) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_533))) (= (select (select .cse3 c_~node~0.base) .cse4) (select (select .cse3 ~manager~0.base) (+ ~manager~0.offset (- 4) (* v_~manager_front~0_120 4))))))) .cse5)) .cse6 .cse7 .cse8) (or (and (or .cse9 .cse10 .cse11 .cse12) (or (forall ((v_~client_back~0_115 Int) (~manager~0.base Int) (~client~0.base Int) (~client~0.offset Int) (v_~manager_front~0_120 Int) (v_ArrVal_533 (Array Int Int)) (~manager~0.offset Int)) (or (< v_~manager_front~0_120 1) (< v_~client_back~0_115 0) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_533))) (= (select (select .cse13 ~manager~0.base) (+ ~manager~0.offset (- 4) (* v_~manager_front~0_120 4))) (select (select .cse13 ~client~0.base) (+ (* v_~client_back~0_115 4) ~client~0.offset)))))) .cse5)) .cse14) (or (< (+ |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (and (or .cse15 .cse16 .cse17) (or .cse6 (and (or .cse10 .cse18 (= c_~node_front~0 c_~node_back~0)) .cse5) .cse8))) (or .cse19 (and (or (= c_~update~0 .cse20) .cse21) .cse22) .cse7 .cse23 .cse24) (or .cse15 .cse16) .cse5 (or .cse15 .cse16 (and (or .cse19 (and .cse22 (or .cse21 (= c_~ok~0 .cse20))) .cse23 .cse24 .cse14) (or .cse1 .cse25 .cse0))) (or (and .cse26 (or .cse9 .cse10 .cse18 .cse27) .cse28) .cse6 .cse29 (not (= (select .cse30 .cse4) c_~update~0)) .cse8) (or .cse15 .cse16 .cse17 .cse25) (or .cse6 .cse29 .cse8 (and .cse2 .cse5))))))) is different from false [2023-09-01 13:02:35,674 INFO L130 PetriNetUnfolder]: 5377/9158 cut-off events. [2023-09-01 13:02:35,674 INFO L131 PetriNetUnfolder]: For 26237/26237 co-relation queries the response was YES. [2023-09-01 13:02:35,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30614 conditions, 9158 events. 5377/9158 cut-off events. For 26237/26237 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 62743 event pairs, 821 based on Foata normal form. 15/9173 useless extension candidates. Maximal degree in co-relation 23955. Up to 2269 conditions per place. [2023-09-01 13:02:35,715 INFO L137 encePairwiseOnDemand]: 528/544 looper letters, 188 selfloop transitions, 133 changer transitions 109/430 dead transitions. [2023-09-01 13:02:35,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 430 transitions, 3707 flow [2023-09-01 13:02:35,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 13:02:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 13:02:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5397 transitions. [2023-09-01 13:02:35,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2543834841628959 [2023-09-01 13:02:35,727 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5397 transitions. [2023-09-01 13:02:35,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5397 transitions. [2023-09-01 13:02:35,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:02:35,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5397 transitions. [2023-09-01 13:02:35,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 138.3846153846154) internal successors, (5397), 39 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:02:35,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 544.0) internal successors, (21760), 40 states have internal predecessors, (21760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:02:35,756 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 544.0) internal successors, (21760), 40 states have internal predecessors, (21760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:02:35,756 INFO L175 Difference]: Start difference. First operand has 93 places, 81 transitions, 850 flow. Second operand 39 states and 5397 transitions. [2023-09-01 13:02:35,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 430 transitions, 3707 flow [2023-09-01 13:02:35,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 430 transitions, 3451 flow, removed 113 selfloop flow, removed 4 redundant places. [2023-09-01 13:02:35,855 INFO L231 Difference]: Finished difference. Result has 137 places, 188 transitions, 2407 flow [2023-09-01 13:02:35,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2407, PETRI_PLACES=137, PETRI_TRANSITIONS=188} [2023-09-01 13:02:35,856 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 108 predicate places. [2023-09-01 13:02:35,856 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 188 transitions, 2407 flow [2023-09-01 13:02:35,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 132.5) internal successors, (3975), 30 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:02:35,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:02:35,858 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:02:35,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 13:02:36,064 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 [2023-09-01 13:02:36,064 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 1 more)] === [2023-09-01 13:02:36,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:02:36,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1736138213, now seen corresponding path program 2 times [2023-09-01 13:02:36,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:02:36,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641537056] [2023-09-01 13:02:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:02:36,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:02:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:02:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:02:36,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:02:36,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641537056] [2023-09-01 13:02:36,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641537056] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:02:36,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944143541] [2023-09-01 13:02:36,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:02:36,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:02:36,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:02:36,985 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) [2023-09-01 13:02:36,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 13:02:37,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:02:37,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:02:37,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 13:02:37,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:02:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:02:37,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:02:46,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:02:46,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 603 treesize of output 1120 [2023-09-01 13:03:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:03:09,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944143541] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:03:09,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:03:09,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-09-01 13:03:09,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751990093] [2023-09-01 13:03:09,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:03:09,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:03:09,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:03:09,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:03:09,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2023-09-01 13:03:11,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:03:12,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 544 [2023-09-01 13:03:12,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 188 transitions, 2407 flow. Second operand has 24 states, 24 states have (on average 176.66666666666666) internal successors, (4240), 24 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:03:12,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:03:12,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 544 [2023-09-01 13:03:12,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:03:19,707 WARN L222 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 129 DAG size of output: 119 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:03:44,338 WARN L222 SmtUtils]: Spent 19.43s on a formula simplification. DAG size of input: 178 DAG size of output: 145 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:03:52,926 WARN L222 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 110 DAG size of output: 108 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:03:55,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:03:57,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:03:59,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:04:00,171 INFO L130 PetriNetUnfolder]: 4731/8259 cut-off events. [2023-09-01 13:04:00,171 INFO L131 PetriNetUnfolder]: For 30265/30265 co-relation queries the response was YES. [2023-09-01 13:04:00,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32379 conditions, 8259 events. 4731/8259 cut-off events. For 30265/30265 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 56936 event pairs, 782 based on Foata normal form. 160/8419 useless extension candidates. Maximal degree in co-relation 31768. Up to 4860 conditions per place. [2023-09-01 13:04:00,209 INFO L137 encePairwiseOnDemand]: 534/544 looper letters, 199 selfloop transitions, 135 changer transitions 103/437 dead transitions. [2023-09-01 13:04:00,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 437 transitions, 4186 flow [2023-09-01 13:04:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 13:04:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 13:04:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5884 transitions. [2023-09-01 13:04:00,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33800551470588236 [2023-09-01 13:04:00,217 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5884 transitions. [2023-09-01 13:04:00,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5884 transitions. [2023-09-01 13:04:00,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:04:00,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5884 transitions. [2023-09-01 13:04:00,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 183.875) internal successors, (5884), 32 states have internal predecessors, (5884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:00,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 544.0) internal successors, (17952), 33 states have internal predecessors, (17952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:00,239 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 544.0) internal successors, (17952), 33 states have internal predecessors, (17952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:00,239 INFO L175 Difference]: Start difference. First operand has 137 places, 188 transitions, 2407 flow. Second operand 32 states and 5884 transitions. [2023-09-01 13:04:00,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 437 transitions, 4186 flow [2023-09-01 13:04:00,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 437 transitions, 3834 flow, removed 130 selfloop flow, removed 13 redundant places. [2023-09-01 13:04:00,401 INFO L231 Difference]: Finished difference. Result has 158 places, 186 transitions, 2363 flow [2023-09-01 13:04:00,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2363, PETRI_PLACES=158, PETRI_TRANSITIONS=186} [2023-09-01 13:04:00,402 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 129 predicate places. [2023-09-01 13:04:00,402 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 186 transitions, 2363 flow [2023-09-01 13:04:00,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 176.66666666666666) internal successors, (4240), 24 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:04:00,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:04:00,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:04:00,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 13:04:00,609 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 [2023-09-01 13:04:00,609 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 1 more)] === [2023-09-01 13:04:00,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:04:00,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1576090582, now seen corresponding path program 3 times [2023-09-01 13:04:00,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:04:00,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252688142] [2023-09-01 13:04:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:04:00,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:04:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:04:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:04:02,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:04:02,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252688142] [2023-09-01 13:04:02,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252688142] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:04:02,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875906395] [2023-09-01 13:04:02,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:04:02,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:04:02,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:04:02,093 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) [2023-09-01 13:04:02,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 13:04:02,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:04:02,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:04:02,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 13:04:02,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:04:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:04:02,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:04:05,877 INFO L321 Elim1Store]: treesize reduction 122, result has 73.2 percent of original size [2023-09-01 13:04:05,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 897 treesize of output 1054 [2023-09-01 13:05:59,335 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 13:05:59,425 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 13:07:30,997 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 13:07:31,164 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 13:07:37,773 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 13:08:09,930 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-09-01 13:08:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:08:43,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875906395] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:08:43,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:08:43,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 5] total 20 [2023-09-01 13:08:43,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780229022] [2023-09-01 13:08:43,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:08:43,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:08:43,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:43,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:08:43,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:08:45,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 544 [2023-09-01 13:08:45,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 186 transitions, 2363 flow. Second operand has 22 states, 22 states have (on average 180.5) internal successors, (3971), 22 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:08:45,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:45,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 544 [2023-09-01 13:08:45,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:47,979 INFO L130 PetriNetUnfolder]: 6494/11176 cut-off events. [2023-09-01 13:08:47,979 INFO L131 PetriNetUnfolder]: For 50368/50368 co-relation queries the response was YES. [2023-09-01 13:08:48,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45453 conditions, 11176 events. 6494/11176 cut-off events. For 50368/50368 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 79394 event pairs, 1105 based on Foata normal form. 11/11176 useless extension candidates. Maximal degree in co-relation 43510. Up to 6475 conditions per place. [2023-09-01 13:08:48,028 INFO L137 encePairwiseOnDemand]: 533/544 looper letters, 154 selfloop transitions, 176 changer transitions 61/391 dead transitions. [2023-09-01 13:08:48,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 391 transitions, 4695 flow [2023-09-01 13:08:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 13:08:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 13:08:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4455 transitions. [2023-09-01 13:08:48,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34122242647058826 [2023-09-01 13:08:48,034 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4455 transitions. [2023-09-01 13:08:48,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4455 transitions. [2023-09-01 13:08:48,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:48,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4455 transitions. [2023-09-01 13:08:48,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 185.625) internal successors, (4455), 24 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:08:48,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 544.0) internal successors, (13600), 25 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:08:48,050 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 544.0) internal successors, (13600), 25 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:08:48,050 INFO L175 Difference]: Start difference. First operand has 158 places, 186 transitions, 2363 flow. Second operand 24 states and 4455 transitions. [2023-09-01 13:08:48,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 391 transitions, 4695 flow [2023-09-01 13:08:48,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 391 transitions, 4235 flow, removed 166 selfloop flow, removed 10 redundant places. [2023-09-01 13:08:48,356 INFO L231 Difference]: Finished difference. Result has 175 places, 232 transitions, 3182 flow [2023-09-01 13:08:48,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3182, PETRI_PLACES=175, PETRI_TRANSITIONS=232} [2023-09-01 13:08:48,357 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 146 predicate places. [2023-09-01 13:08:48,357 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 232 transitions, 3182 flow [2023-09-01 13:08:48,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 180.5) internal successors, (3971), 22 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:08:48,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:48,358 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:48,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 13:08:48,558 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 [2023-09-01 13:08:48,559 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 1 more)] === [2023-09-01 13:08:48,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:48,559 INFO L85 PathProgramCache]: Analyzing trace with hash -965021291, now seen corresponding path program 4 times [2023-09-01 13:08:48,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:48,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855522198] [2023-09-01 13:08:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:48,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:08:49,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:49,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855522198] [2023-09-01 13:08:49,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855522198] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:08:49,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143950224] [2023-09-01 13:08:49,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:08:49,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:08:49,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:08:49,093 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) [2023-09-01 13:08:49,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 13:08:49,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:08:49,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:08:49,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 13:08:49,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:08:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 13:08:49,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:08:50,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:08:50,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 248 treesize of output 254 [2023-09-01 13:08:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 13:08:50,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143950224] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:08:50,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:08:50,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-09-01 13:08:50,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372262888] [2023-09-01 13:08:50,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:08:50,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 13:08:50,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:50,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 13:08:50,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-09-01 13:08:51,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 544 [2023-09-01 13:08:51,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 232 transitions, 3182 flow. Second operand has 18 states, 18 states have (on average 183.72222222222223) internal successors, (3307), 18 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:08:51,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:51,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 544 [2023-09-01 13:08:51,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:08:53,747 INFO L130 PetriNetUnfolder]: 7906/13471 cut-off events. [2023-09-01 13:08:53,747 INFO L131 PetriNetUnfolder]: For 56958/56958 co-relation queries the response was YES. [2023-09-01 13:08:53,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55283 conditions, 13471 events. 7906/13471 cut-off events. For 56958/56958 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 96870 event pairs, 4002 based on Foata normal form. 156/13620 useless extension candidates. Maximal degree in co-relation 53576. Up to 7735 conditions per place. [2023-09-01 13:08:53,795 INFO L137 encePairwiseOnDemand]: 538/544 looper letters, 229 selfloop transitions, 44 changer transitions 54/327 dead transitions. [2023-09-01 13:08:53,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 327 transitions, 4550 flow [2023-09-01 13:08:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 13:08:53,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 13:08:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2087 transitions. [2023-09-01 13:08:53,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3487633689839572 [2023-09-01 13:08:53,799 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2087 transitions. [2023-09-01 13:08:53,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2087 transitions. [2023-09-01 13:08:53,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:08:53,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2087 transitions. [2023-09-01 13:08:53,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 189.72727272727272) internal successors, (2087), 11 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:08:53,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 544.0) internal successors, (6528), 12 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:08:53,806 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 544.0) internal successors, (6528), 12 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:08:53,806 INFO L175 Difference]: Start difference. First operand has 175 places, 232 transitions, 3182 flow. Second operand 11 states and 2087 transitions. [2023-09-01 13:08:53,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 327 transitions, 4550 flow [2023-09-01 13:08:54,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 327 transitions, 4223 flow, removed 60 selfloop flow, removed 12 redundant places. [2023-09-01 13:08:54,205 INFO L231 Difference]: Finished difference. Result has 176 places, 214 transitions, 2784 flow [2023-09-01 13:08:54,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=2880, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2784, PETRI_PLACES=176, PETRI_TRANSITIONS=214} [2023-09-01 13:08:54,206 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 147 predicate places. [2023-09-01 13:08:54,206 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 214 transitions, 2784 flow [2023-09-01 13:08:54,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.72222222222223) internal successors, (3307), 18 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:08:54,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:08:54,207 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:08:54,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 13:08:54,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 13:08:54,408 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:08:54,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:08:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1625832884, now seen corresponding path program 5 times [2023-09-01 13:08:54,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:08:54,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153269662] [2023-09-01 13:08:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:08:54,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:08:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:08:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:08:55,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:08:55,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153269662] [2023-09-01 13:08:55,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153269662] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:08:55,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230003467] [2023-09-01 13:08:55,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:08:55,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:08:55,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:08:55,481 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:08:55,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 13:08:55,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:08:55,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:08:55,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 13:08:55,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:08:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 13:08:56,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:08:56,706 INFO L321 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2023-09-01 13:08:56,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 261 treesize of output 263 [2023-09-01 13:08:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 13:08:57,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230003467] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:08:57,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:08:57,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 21 [2023-09-01 13:08:57,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081318440] [2023-09-01 13:08:57,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:08:57,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 13:08:57,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:08:57,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 13:08:57,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2023-09-01 13:08:57,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 544 [2023-09-01 13:08:57,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 214 transitions, 2784 flow. Second operand has 22 states, 22 states have (on average 182.0) internal successors, (4004), 22 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:08:57,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:08:57,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 544 [2023-09-01 13:08:57,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:09:00,221 INFO L130 PetriNetUnfolder]: 7354/12385 cut-off events. [2023-09-01 13:09:00,222 INFO L131 PetriNetUnfolder]: For 57022/57022 co-relation queries the response was YES. [2023-09-01 13:09:00,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52362 conditions, 12385 events. 7354/12385 cut-off events. For 57022/57022 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 85394 event pairs, 1066 based on Foata normal form. 144/12523 useless extension candidates. Maximal degree in co-relation 50651. Up to 6997 conditions per place. [2023-09-01 13:09:00,270 INFO L137 encePairwiseOnDemand]: 535/544 looper letters, 221 selfloop transitions, 115 changer transitions 42/378 dead transitions. [2023-09-01 13:09:00,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 378 transitions, 4616 flow [2023-09-01 13:09:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 13:09:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 13:09:00,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3959 transitions. [2023-09-01 13:09:00,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34655112044817926 [2023-09-01 13:09:00,275 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3959 transitions. [2023-09-01 13:09:00,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3959 transitions. [2023-09-01 13:09:00,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:09:00,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3959 transitions. [2023-09-01 13:09:00,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 188.52380952380952) internal successors, (3959), 21 states have internal predecessors, (3959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:09:00,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 544.0) internal successors, (11968), 22 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:09:00,288 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 544.0) internal successors, (11968), 22 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:09:00,289 INFO L175 Difference]: Start difference. First operand has 176 places, 214 transitions, 2784 flow. Second operand 21 states and 3959 transitions. [2023-09-01 13:09:00,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 378 transitions, 4616 flow [2023-09-01 13:09:00,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 378 transitions, 4500 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-09-01 13:09:00,562 INFO L231 Difference]: Finished difference. Result has 186 places, 225 transitions, 3168 flow [2023-09-01 13:09:00,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3168, PETRI_PLACES=186, PETRI_TRANSITIONS=225} [2023-09-01 13:09:00,563 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2023-09-01 13:09:00,563 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 225 transitions, 3168 flow [2023-09-01 13:09:00,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 182.0) internal successors, (4004), 22 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:09:00,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:09:00,564 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:09:00,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-09-01 13:09:00,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 13:09:00,764 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 13:09:00,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:09:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash -605202817, now seen corresponding path program 6 times [2023-09-01 13:09:00,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:09:00,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695013054] [2023-09-01 13:09:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:09:00,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:09:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:09:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:09:02,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:09:02,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695013054] [2023-09-01 13:09:02,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695013054] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:09:02,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185397065] [2023-09-01 13:09:02,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:09:02,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:09:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:09:02,902 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:09:02,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 13:09:03,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 13:09:03,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:09:03,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 65 conjunts are in the unsatisfiable core [2023-09-01 13:09:03,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:09:03,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:09:03,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:09:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:09:03,210 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 13:09:03,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-09-01 13:09:03,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 13:09:03,431 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-09-01 13:09:03,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-09-01 13:09:03,529 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:09:03,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-09-01 13:09:03,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:09:03,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:09:03,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:09:03,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:09:05,083 INFO L321 Elim1Store]: treesize reduction 56, result has 30.0 percent of original size [2023-09-01 13:09:05,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 43 [2023-09-01 13:09:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:09:05,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:10:13,793 WARN L222 SmtUtils]: Spent 53.79s on a formula simplification. DAG size of input: 231 DAG size of output: 228 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:11:48,243 WARN L222 SmtUtils]: Spent 26.65s on a formula simplification that was a NOOP. DAG size: 207 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 13:11:55,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:11:55,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 57 [2023-09-01 13:11:56,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:11:56,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3440630 treesize of output 3309578 [2023-09-01 13:11:58,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:11:58,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6454 treesize of output 6087 [2023-09-01 13:11:58,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:11:58,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6070 treesize of output 4551 [2023-09-01 13:11:58,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:11:58,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4534 treesize of output 4359 [2023-09-01 13:11:58,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:11:58,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4342 treesize of output 3591 [2023-09-01 13:12:02,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:12:02,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 102 [2023-09-01 13:12:02,668 INFO L321 Elim1Store]: treesize reduction 5, result has 93.6 percent of original size [2023-09-01 13:12:02,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27732 treesize of output 26744 [2023-09-01 13:12:04,019 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:12:04,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:12:04,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 6862 treesize of output 6098 [2023-09-01 13:12:04,152 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:12:04,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:12:04,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 6038 treesize of output 4450 [2023-09-01 13:12:04,289 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:12:04,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:12:04,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 4390 treesize of output 4038 [2023-09-01 13:12:04,432 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:12:04,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:12:04,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 3879 treesize of output 3733 [2023-09-01 13:12:45,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:12:45,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 57 [2023-09-01 13:12:45,734 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 13:12:45,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1670 treesize of output 1607 [2023-09-01 13:12:45,782 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 13:12:45,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 393 treesize of output 341 [2023-09-01 13:12:45,795 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:12:45,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 151 [2023-09-01 13:12:45,810 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 13:12:45,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 224 [2023-09-01 13:12:45,827 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 13:12:45,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 98 [2023-09-01 13:12:45,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:12:45,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 102 [2023-09-01 13:12:46,096 INFO L321 Elim1Store]: treesize reduction 5, result has 93.6 percent of original size [2023-09-01 13:12:46,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1557436 treesize of output 1511356 [2023-09-01 13:12:48,712 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:12:48,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:12:48,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 6862 treesize of output 5274 [2023-09-01 13:12:48,899 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:12:48,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:12:48,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 5060 treesize of output 4708 [2023-09-01 13:12:49,040 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:12:49,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:12:49,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 4648 treesize of output 4502 [2023-09-01 13:12:49,185 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:12:49,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:12:49,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 4497 treesize of output 3733 [2023-09-01 13:13:36,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:13:36,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 57 [2023-09-01 13:13:36,150 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 13:13:36,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 830 treesize of output 801 [2023-09-01 13:13:36,190 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 13:13:36,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 393 treesize of output 341 [2023-09-01 13:13:36,203 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 13:13:36,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 341 treesize of output 315 [2023-09-01 13:13:36,217 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 13:13:36,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 315 treesize of output 211 [2023-09-01 13:13:36,233 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 13:13:36,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 98 [2023-09-01 13:13:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:13:46,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185397065] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:13:46,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:13:46,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 43 [2023-09-01 13:13:46,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300877417] [2023-09-01 13:13:46,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:13:46,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-09-01 13:13:46,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:13:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-09-01 13:13:46,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1547, Unknown=21, NotChecked=0, Total=1980 [2023-09-01 13:13:47,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:13:49,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:13:52,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:13:53,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:13:57,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:13:58,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:14:01,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:14:04,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:14:06,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 13:14:07,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Killed by 15