/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 04:12:23,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 04:12:23,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 04:12:23,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 04:12:23,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 04:12:23,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 04:12:23,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 04:12:23,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 04:12:23,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 04:12:23,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 04:12:23,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 04:12:23,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 04:12:23,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 04:12:23,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 04:12:23,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 04:12:23,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 04:12:23,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 04:12:23,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 04:12:23,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 04:12:23,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 04:12:23,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 04:12:23,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 04:12:23,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 04:12:23,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 04:12:23,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 04:12:23,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 04:12:23,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 04:12:23,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 04:12:23,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 04:12:23,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 04:12:23,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 04:12:23,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 04:12:23,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 04:12:23,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 04:12:23,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 04:12:23,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 04:12:23,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 04:12:23,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 04:12:23,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 04:12:23,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 04:12:23,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 04:12:23,224 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 04:12:23,248 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 04:12:23,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 04:12:23,249 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 04:12:23,249 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 04:12:23,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 04:12:23,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 04:12:23,250 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 04:12:23,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 04:12:23,250 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 04:12:23,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 04:12:23,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 04:12:23,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 04:12:23,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 04:12:23,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 04:12:23,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 04:12:23,251 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 04:12:23,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 04:12:23,252 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 04:12:23,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 04:12:23,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 04:12:23,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 04:12:23,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 04:12:23,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 04:12:23,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:12:23,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 04:12:23,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 04:12:23,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 04:12:23,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 04:12:23,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 04:12:23,253 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 04:12:23,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 04:12:23,253 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 04:12:23,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 04:12:23,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 04:12:23,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 04:12:23,439 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 04:12:23,439 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 04:12:23,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-01-28 04:12:24,388 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 04:12:24,520 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 04:12:24,521 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-01-28 04:12:24,527 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52f230b77/3d67e7517c4d4c8dbffb877d7c65ca03/FLAG0ff336935 [2023-01-28 04:12:24,535 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52f230b77/3d67e7517c4d4c8dbffb877d7c65ca03 [2023-01-28 04:12:24,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 04:12:24,537 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 04:12:24,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 04:12:24,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 04:12:24,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 04:12:24,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:12:24" (1/1) ... [2023-01-28 04:12:24,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4973bea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24, skipping insertion in model container [2023-01-28 04:12:24,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:12:24" (1/1) ... [2023-01-28 04:12:24,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 04:12:24,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 04:12:24,663 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-figure1.wvr.c[1991,2004] [2023-01-28 04:12:24,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:12:24,671 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 04:12:24,681 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-figure1.wvr.c[1991,2004] [2023-01-28 04:12:24,682 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:12:24,688 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 04:12:24,688 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 04:12:24,692 INFO L208 MainTranslator]: Completed translation [2023-01-28 04:12:24,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24 WrapperNode [2023-01-28 04:12:24,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 04:12:24,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 04:12:24,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 04:12:24,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 04:12:24,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24" (1/1) ... [2023-01-28 04:12:24,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24" (1/1) ... [2023-01-28 04:12:24,717 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2023-01-28 04:12:24,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 04:12:24,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 04:12:24,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 04:12:24,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 04:12:24,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24" (1/1) ... [2023-01-28 04:12:24,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24" (1/1) ... [2023-01-28 04:12:24,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24" (1/1) ... [2023-01-28 04:12:24,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24" (1/1) ... [2023-01-28 04:12:24,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24" (1/1) ... [2023-01-28 04:12:24,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24" (1/1) ... [2023-01-28 04:12:24,738 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24" (1/1) ... [2023-01-28 04:12:24,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24" (1/1) ... [2023-01-28 04:12:24,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 04:12:24,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 04:12:24,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 04:12:24,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 04:12:24,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24" (1/1) ... [2023-01-28 04:12:24,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:12:24,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:24,774 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) [2023-01-28 04:12:24,780 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 [2023-01-28 04:12:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 04:12:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 04:12:24,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 04:12:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 04:12:24,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 04:12:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 04:12:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 04:12:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 04:12:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 04:12:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 04:12:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 04:12:24,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 04:12:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 04:12:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 04:12:24,802 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 04:12:24,911 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 04:12:24,913 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 04:12:25,025 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 04:12:25,055 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 04:12:25,055 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 04:12:25,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:12:25 BoogieIcfgContainer [2023-01-28 04:12:25,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 04:12:25,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 04:12:25,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 04:12:25,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 04:12:25,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 04:12:24" (1/3) ... [2023-01-28 04:12:25,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbb6c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:12:25, skipping insertion in model container [2023-01-28 04:12:25,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:12:24" (2/3) ... [2023-01-28 04:12:25,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbb6c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:12:25, skipping insertion in model container [2023-01-28 04:12:25,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:12:25" (3/3) ... [2023-01-28 04:12:25,074 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-01-28 04:12:25,087 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 04:12:25,087 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 04:12:25,087 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 04:12:25,126 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 04:12:25,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 162 flow [2023-01-28 04:12:25,186 INFO L130 PetriNetUnfolder]: 5/71 cut-off events. [2023-01-28 04:12:25,186 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 04:12:25,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 5/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-01-28 04:12:25,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 162 flow [2023-01-28 04:12:25,192 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 63 transitions, 138 flow [2023-01-28 04:12:25,194 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 04:12:25,212 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 63 transitions, 138 flow [2023-01-28 04:12:25,213 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 63 transitions, 138 flow [2023-01-28 04:12:25,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 63 transitions, 138 flow [2023-01-28 04:12:25,228 INFO L130 PetriNetUnfolder]: 5/63 cut-off events. [2023-01-28 04:12:25,228 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 04:12:25,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 63 events. 5/63 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-01-28 04:12:25,230 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-01-28 04:12:26,467 INFO L134 LiptonReduction]: Checked pairs total: 535 [2023-01-28 04:12:26,467 INFO L136 LiptonReduction]: Total number of compositions: 53 [2023-01-28 04:12:26,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 04:12:26,481 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=false, 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;@76f437fe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 04:12:26,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 04:12:26,484 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-28 04:12:26,484 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 04:12:26,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:26,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:26,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:26,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:26,488 INFO L85 PathProgramCache]: Analyzing trace with hash -553565742, now seen corresponding path program 1 times [2023-01-28 04:12:26,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:26,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680810348] [2023-01-28 04:12:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:26,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:26,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:26,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680810348] [2023-01-28 04:12:26,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680810348] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:12:26,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:12:26,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 04:12:26,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665182803] [2023-01-28 04:12:26,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:12:26,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 04:12:26,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:26,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 04:12:26,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 04:12:26,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 126 [2023-01-28 04:12:26,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:26,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:26,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 126 [2023-01-28 04:12:26,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:26,793 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2023-01-28 04:12:26,793 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-01-28 04:12:26,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 260 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2023-01-28 04:12:26,797 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-01-28 04:12:26,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2023-01-28 04:12:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 04:12:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 04:12:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2023-01-28 04:12:26,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-01-28 04:12:26,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 207 transitions. [2023-01-28 04:12:26,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 207 transitions. [2023-01-28 04:12:26,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:26,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 207 transitions. [2023-01-28 04:12:26,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:26,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:26,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:26,822 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 207 transitions. [2023-01-28 04:12:26,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2023-01-28 04:12:26,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 04:12:26,825 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-01-28 04:12:26,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-01-28 04:12:26,830 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-01-28 04:12:26,830 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-01-28 04:12:26,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:26,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:26,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:26,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 04:12:26,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:26,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:26,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1684820141, now seen corresponding path program 1 times [2023-01-28 04:12:26,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:26,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286761479] [2023-01-28 04:12:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:26,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:26,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:26,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286761479] [2023-01-28 04:12:26,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286761479] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:12:26,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:12:26,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 04:12:26,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658502902] [2023-01-28 04:12:26,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:12:26,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:12:26,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:26,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:12:26,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:12:26,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:26,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:26,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:26,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:26,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:27,034 INFO L130 PetriNetUnfolder]: 76/153 cut-off events. [2023-01-28 04:12:27,034 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-01-28 04:12:27,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 153 events. 76/153 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 473 event pairs, 24 based on Foata normal form. 2/155 useless extension candidates. Maximal degree in co-relation 183. Up to 78 conditions per place. [2023-01-28 04:12:27,035 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2023-01-28 04:12:27,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 39 transitions, 191 flow [2023-01-28 04:12:27,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:12:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:12:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 292 transitions. [2023-01-28 04:12:27,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634920634920635 [2023-01-28 04:12:27,040 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 292 transitions. [2023-01-28 04:12:27,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 292 transitions. [2023-01-28 04:12:27,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:27,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 292 transitions. [2023-01-28 04:12:27,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 58.4) internal successors, (292), 5 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,043 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,043 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 292 transitions. [2023-01-28 04:12:27,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 39 transitions, 191 flow [2023-01-28 04:12:27,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 04:12:27,045 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 70 flow [2023-01-28 04:12:27,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-01-28 04:12:27,046 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-01-28 04:12:27,046 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 70 flow [2023-01-28 04:12:27,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:27,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:27,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 04:12:27,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:27,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:27,049 INFO L85 PathProgramCache]: Analyzing trace with hash -298983667, now seen corresponding path program 2 times [2023-01-28 04:12:27,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:27,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017177185] [2023-01-28 04:12:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:27,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:27,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:27,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017177185] [2023-01-28 04:12:27,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017177185] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:27,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192943386] [2023-01-28 04:12:27,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:12:27,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:27,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:27,119 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) [2023-01-28 04:12:27,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 04:12:27,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:12:27,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:27,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 04:12:27,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:27,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:27,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192943386] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:27,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:27,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 04:12:27,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505007838] [2023-01-28 04:12:27,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:27,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 04:12:27,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:27,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 04:12:27,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-28 04:12:27,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:27,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 70 flow. Second operand has 8 states, 8 states have (on average 53.625) internal successors, (429), 8 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:27,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:27,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:27,383 INFO L130 PetriNetUnfolder]: 82/158 cut-off events. [2023-01-28 04:12:27,383 INFO L131 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2023-01-28 04:12:27,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 158 events. 82/158 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 492 event pairs, 14 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 143. Up to 90 conditions per place. [2023-01-28 04:12:27,385 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 29 selfloop transitions, 4 changer transitions 5/38 dead transitions. [2023-01-28 04:12:27,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 212 flow [2023-01-28 04:12:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:12:27,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:12:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 292 transitions. [2023-01-28 04:12:27,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634920634920635 [2023-01-28 04:12:27,387 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 292 transitions. [2023-01-28 04:12:27,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 292 transitions. [2023-01-28 04:12:27,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:27,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 292 transitions. [2023-01-28 04:12:27,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 58.4) internal successors, (292), 5 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,389 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,389 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 70 flow. Second operand 5 states and 292 transitions. [2023-01-28 04:12:27,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 212 flow [2023-01-28 04:12:27,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 201 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-28 04:12:27,391 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 91 flow [2023-01-28 04:12:27,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-01-28 04:12:27,391 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-01-28 04:12:27,391 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 91 flow [2023-01-28 04:12:27,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 53.625) internal successors, (429), 8 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:27,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:27,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:27,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:27,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:27,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash 435057483, now seen corresponding path program 3 times [2023-01-28 04:12:27,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:27,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712717026] [2023-01-28 04:12:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:27,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:27,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:27,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712717026] [2023-01-28 04:12:27,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712717026] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:12:27,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:12:27,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 04:12:27,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676497711] [2023-01-28 04:12:27,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:12:27,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:12:27,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:27,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:12:27,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:12:27,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:27,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:27,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:27,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:27,729 INFO L130 PetriNetUnfolder]: 90/179 cut-off events. [2023-01-28 04:12:27,729 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2023-01-28 04:12:27,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 179 events. 90/179 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 565 event pairs, 30 based on Foata normal form. 2/181 useless extension candidates. Maximal degree in co-relation 327. Up to 84 conditions per place. [2023-01-28 04:12:27,733 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 25 selfloop transitions, 6 changer transitions 8/39 dead transitions. [2023-01-28 04:12:27,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 241 flow [2023-01-28 04:12:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:12:27,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:12:27,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 291 transitions. [2023-01-28 04:12:27,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2023-01-28 04:12:27,734 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 291 transitions. [2023-01-28 04:12:27,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 291 transitions. [2023-01-28 04:12:27,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:27,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 291 transitions. [2023-01-28 04:12:27,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,736 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,737 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 91 flow. Second operand 5 states and 291 transitions. [2023-01-28 04:12:27,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 241 flow [2023-01-28 04:12:27,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 04:12:27,740 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 129 flow [2023-01-28 04:12:27,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-01-28 04:12:27,741 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 13 predicate places. [2023-01-28 04:12:27,741 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 129 flow [2023-01-28 04:12:27,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:27,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:27,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 04:12:27,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:27,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:27,743 INFO L85 PathProgramCache]: Analyzing trace with hash -431708467, now seen corresponding path program 4 times [2023-01-28 04:12:27,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:27,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374868759] [2023-01-28 04:12:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:27,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:27,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:27,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374868759] [2023-01-28 04:12:27,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374868759] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:12:27,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:12:27,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 04:12:27,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727731975] [2023-01-28 04:12:27,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:12:27,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:12:27,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:27,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:12:27,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:12:27,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:27,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:27,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:27,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:27,878 INFO L130 PetriNetUnfolder]: 81/159 cut-off events. [2023-01-28 04:12:27,878 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-01-28 04:12:27,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 159 events. 81/159 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 479 event pairs, 34 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 242. Up to 116 conditions per place. [2023-01-28 04:12:27,880 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 22 selfloop transitions, 6 changer transitions 15/43 dead transitions. [2023-01-28 04:12:27,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 43 transitions, 306 flow [2023-01-28 04:12:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 04:12:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 04:12:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2023-01-28 04:12:27,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2023-01-28 04:12:27,882 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2023-01-28 04:12:27,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2023-01-28 04:12:27,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:27,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2023-01-28 04:12:27,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 126.0) internal successors, (882), 7 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,885 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 126.0) internal successors, (882), 7 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,885 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 129 flow. Second operand 6 states and 344 transitions. [2023-01-28 04:12:27,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 43 transitions, 306 flow [2023-01-28 04:12:27,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 292 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 04:12:27,889 INFO L231 Difference]: Finished difference. Result has 38 places, 24 transitions, 164 flow [2023-01-28 04:12:27,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=38, PETRI_TRANSITIONS=24} [2023-01-28 04:12:27,891 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-01-28 04:12:27,891 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 24 transitions, 164 flow [2023-01-28 04:12:27,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:27,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:27,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:27,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 04:12:27,892 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:27,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1652494975, now seen corresponding path program 5 times [2023-01-28 04:12:27,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:27,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226839672] [2023-01-28 04:12:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:27,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:27,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:27,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226839672] [2023-01-28 04:12:27,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226839672] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:27,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576773500] [2023-01-28 04:12:27,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:12:27,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:27,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:27,959 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) [2023-01-28 04:12:27,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 04:12:28,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:12:28,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:28,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 04:12:28,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:28,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:28,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576773500] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:28,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:28,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-28 04:12:28,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843304536] [2023-01-28 04:12:28,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:28,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 04:12:28,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:28,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 04:12:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-01-28 04:12:28,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:28,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 24 transitions, 164 flow. Second operand has 10 states, 10 states have (on average 53.5) internal successors, (535), 10 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:28,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:28,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:28,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:28,172 INFO L130 PetriNetUnfolder]: 83/156 cut-off events. [2023-01-28 04:12:28,172 INFO L131 PetriNetUnfolder]: For 432/432 co-relation queries the response was YES. [2023-01-28 04:12:28,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 156 events. 83/156 cut-off events. For 432/432 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 429 event pairs, 14 based on Foata normal form. 6/162 useless extension candidates. Maximal degree in co-relation 468. Up to 100 conditions per place. [2023-01-28 04:12:28,173 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 37 selfloop transitions, 11 changer transitions 1/49 dead transitions. [2023-01-28 04:12:28,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 365 flow [2023-01-28 04:12:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:12:28,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:12:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 454 transitions. [2023-01-28 04:12:28,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503968253968254 [2023-01-28 04:12:28,180 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 454 transitions. [2023-01-28 04:12:28,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 454 transitions. [2023-01-28 04:12:28,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:28,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 454 transitions. [2023-01-28 04:12:28,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 56.75) internal successors, (454), 8 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:28,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 126.0) internal successors, (1134), 9 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:28,183 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 126.0) internal successors, (1134), 9 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:28,183 INFO L175 Difference]: Start difference. First operand has 38 places, 24 transitions, 164 flow. Second operand 8 states and 454 transitions. [2023-01-28 04:12:28,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 365 flow [2023-01-28 04:12:28,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 49 transitions, 343 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-01-28 04:12:28,187 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 197 flow [2023-01-28 04:12:28,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2023-01-28 04:12:28,193 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 22 predicate places. [2023-01-28 04:12:28,193 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 197 flow [2023-01-28 04:12:28,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.5) internal successors, (535), 10 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:28,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:28,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:28,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:28,397 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 [2023-01-28 04:12:28,397 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:28,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:28,397 INFO L85 PathProgramCache]: Analyzing trace with hash -971592469, now seen corresponding path program 6 times [2023-01-28 04:12:28,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:28,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628049223] [2023-01-28 04:12:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:28,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:28,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:28,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628049223] [2023-01-28 04:12:28,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628049223] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:28,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507357864] [2023-01-28 04:12:28,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:12:28,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:28,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:28,449 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) [2023-01-28 04:12:28,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 04:12:28,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:12:28,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:28,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 04:12:28,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:28,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:28,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507357864] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:28,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:28,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-28 04:12:28,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829065218] [2023-01-28 04:12:28,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:28,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 04:12:28,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:28,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 04:12:28,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-28 04:12:28,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:28,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 53.3) internal successors, (533), 10 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:28,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:28,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:28,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:28,595 INFO L130 PetriNetUnfolder]: 75/140 cut-off events. [2023-01-28 04:12:28,595 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-01-28 04:12:28,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 140 events. 75/140 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 21 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 509. Up to 87 conditions per place. [2023-01-28 04:12:28,596 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 28 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2023-01-28 04:12:28,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 317 flow [2023-01-28 04:12:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:12:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:12:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 287 transitions. [2023-01-28 04:12:28,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2023-01-28 04:12:28,606 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 287 transitions. [2023-01-28 04:12:28,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 287 transitions. [2023-01-28 04:12:28,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:28,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 287 transitions. [2023-01-28 04:12:28,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 57.4) internal successors, (287), 5 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:28,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:28,608 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:28,608 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 197 flow. Second operand 5 states and 287 transitions. [2023-01-28 04:12:28,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 317 flow [2023-01-28 04:12:28,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 293 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-01-28 04:12:28,610 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 177 flow [2023-01-28 04:12:28,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2023-01-28 04:12:28,610 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-01-28 04:12:28,610 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 177 flow [2023-01-28 04:12:28,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.3) internal successors, (533), 10 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:28,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:28,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:28,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:28,815 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 [2023-01-28 04:12:28,818 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:28,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:28,818 INFO L85 PathProgramCache]: Analyzing trace with hash -856446032, now seen corresponding path program 1 times [2023-01-28 04:12:28,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:28,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673195897] [2023-01-28 04:12:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:28,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:28,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:28,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673195897] [2023-01-28 04:12:28,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673195897] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:28,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933917406] [2023-01-28 04:12:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:28,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:28,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:28,886 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) [2023-01-28 04:12:28,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 04:12:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:28,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 04:12:28,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:28,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:28,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933917406] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:28,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:28,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2023-01-28 04:12:28,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890491521] [2023-01-28 04:12:28,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:28,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 04:12:28,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:28,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 04:12:28,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 04:12:28,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 126 [2023-01-28 04:12:28,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:28,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:28,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 126 [2023-01-28 04:12:28,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:29,043 INFO L130 PetriNetUnfolder]: 118/222 cut-off events. [2023-01-28 04:12:29,044 INFO L131 PetriNetUnfolder]: For 667/687 co-relation queries the response was YES. [2023-01-28 04:12:29,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 222 events. 118/222 cut-off events. For 667/687 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 763 event pairs, 12 based on Foata normal form. 19/235 useless extension candidates. Maximal degree in co-relation 759. Up to 111 conditions per place. [2023-01-28 04:12:29,045 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2023-01-28 04:12:29,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 380 flow [2023-01-28 04:12:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 04:12:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 04:12:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 279 transitions. [2023-01-28 04:12:29,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2023-01-28 04:12:29,046 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 279 transitions. [2023-01-28 04:12:29,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 279 transitions. [2023-01-28 04:12:29,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:29,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 279 transitions. [2023-01-28 04:12:29,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:29,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 126.0) internal successors, (630), 5 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:29,048 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 126.0) internal successors, (630), 5 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:29,048 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 177 flow. Second operand 4 states and 279 transitions. [2023-01-28 04:12:29,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 380 flow [2023-01-28 04:12:29,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 323 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-01-28 04:12:29,050 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 238 flow [2023-01-28 04:12:29,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-01-28 04:12:29,051 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-01-28 04:12:29,051 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 238 flow [2023-01-28 04:12:29,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:29,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:29,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:29,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:29,258 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 [2023-01-28 04:12:29,258 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:29,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:29,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1694599747, now seen corresponding path program 2 times [2023-01-28 04:12:29,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:29,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458377382] [2023-01-28 04:12:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:29,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:29,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:29,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458377382] [2023-01-28 04:12:29,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458377382] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:29,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434424910] [2023-01-28 04:12:29,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:12:29,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:29,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:29,309 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) [2023-01-28 04:12:29,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 04:12:29,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:12:29,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:29,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:12:29,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:29,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:29,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434424910] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:29,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:29,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 04:12:29,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453866257] [2023-01-28 04:12:29,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:29,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 04:12:29,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:29,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 04:12:29,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-01-28 04:12:29,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:29,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 238 flow. Second operand has 12 states, 12 states have (on average 53.25) internal successors, (639), 12 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:29,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:29,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:29,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:29,670 INFO L130 PetriNetUnfolder]: 236/464 cut-off events. [2023-01-28 04:12:29,670 INFO L131 PetriNetUnfolder]: For 977/977 co-relation queries the response was YES. [2023-01-28 04:12:29,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1793 conditions, 464 events. 236/464 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2004 event pairs, 3 based on Foata normal form. 16/480 useless extension candidates. Maximal degree in co-relation 666. Up to 157 conditions per place. [2023-01-28 04:12:29,672 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 83 selfloop transitions, 44 changer transitions 6/133 dead transitions. [2023-01-28 04:12:29,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 133 transitions, 1027 flow [2023-01-28 04:12:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 04:12:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 04:12:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1130 transitions. [2023-01-28 04:12:29,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2023-01-28 04:12:29,675 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1130 transitions. [2023-01-28 04:12:29,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1130 transitions. [2023-01-28 04:12:29,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:29,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1130 transitions. [2023-01-28 04:12:29,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 56.5) internal successors, (1130), 20 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:29,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:29,680 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:29,680 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 238 flow. Second operand 20 states and 1130 transitions. [2023-01-28 04:12:29,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 133 transitions, 1027 flow [2023-01-28 04:12:29,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 133 transitions, 993 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-01-28 04:12:29,684 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 673 flow [2023-01-28 04:12:29,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=673, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2023-01-28 04:12:29,685 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 44 predicate places. [2023-01-28 04:12:29,685 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 673 flow [2023-01-28 04:12:29,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.25) internal successors, (639), 12 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:29,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:29,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:29,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:29,890 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 [2023-01-28 04:12:29,891 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:29,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:29,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1093790239, now seen corresponding path program 3 times [2023-01-28 04:12:29,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:29,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470834996] [2023-01-28 04:12:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:29,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:29,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:29,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470834996] [2023-01-28 04:12:29,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470834996] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:29,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513878979] [2023-01-28 04:12:29,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:12:29,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:29,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:29,941 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) [2023-01-28 04:12:29,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 04:12:29,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:12:29,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:29,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:12:29,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:30,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:30,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513878979] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:30,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:30,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-28 04:12:30,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327326372] [2023-01-28 04:12:30,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:30,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 04:12:30,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:30,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 04:12:30,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-01-28 04:12:30,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:30,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 673 flow. Second operand has 11 states, 11 states have (on average 53.09090909090909) internal successors, (584), 11 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:30,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:30,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:30,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:30,178 INFO L130 PetriNetUnfolder]: 246/505 cut-off events. [2023-01-28 04:12:30,178 INFO L131 PetriNetUnfolder]: For 1897/1897 co-relation queries the response was YES. [2023-01-28 04:12:30,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 505 events. 246/505 cut-off events. For 1897/1897 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2349 event pairs, 21 based on Foata normal form. 12/517 useless extension candidates. Maximal degree in co-relation 2005. Up to 346 conditions per place. [2023-01-28 04:12:30,181 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 84 selfloop transitions, 19 changer transitions 12/115 dead transitions. [2023-01-28 04:12:30,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 115 transitions, 1208 flow [2023-01-28 04:12:30,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:12:30,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:12:30,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 405 transitions. [2023-01-28 04:12:30,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2023-01-28 04:12:30,183 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 405 transitions. [2023-01-28 04:12:30,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 405 transitions. [2023-01-28 04:12:30,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:30,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 405 transitions. [2023-01-28 04:12:30,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:30,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:30,185 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:30,185 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 673 flow. Second operand 7 states and 405 transitions. [2023-01-28 04:12:30,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 115 transitions, 1208 flow [2023-01-28 04:12:30,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 115 transitions, 953 flow, removed 112 selfloop flow, removed 6 redundant places. [2023-01-28 04:12:30,193 INFO L231 Difference]: Finished difference. Result has 68 places, 81 transitions, 661 flow [2023-01-28 04:12:30,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=661, PETRI_PLACES=68, PETRI_TRANSITIONS=81} [2023-01-28 04:12:30,193 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 48 predicate places. [2023-01-28 04:12:30,194 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 81 transitions, 661 flow [2023-01-28 04:12:30,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.09090909090909) internal successors, (584), 11 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:30,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:30,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:30,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:30,398 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 [2023-01-28 04:12:30,401 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:30,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash 875450143, now seen corresponding path program 4 times [2023-01-28 04:12:30,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:30,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56733437] [2023-01-28 04:12:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:30,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:30,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:30,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56733437] [2023-01-28 04:12:30,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56733437] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:30,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983194517] [2023-01-28 04:12:30,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:12:30,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:30,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:30,453 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) [2023-01-28 04:12:30,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 04:12:30,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:12:30,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:30,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:12:30,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:30,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:30,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983194517] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:30,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:30,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 04:12:30,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286926849] [2023-01-28 04:12:30,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:30,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 04:12:30,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:30,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 04:12:30,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-01-28 04:12:30,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:30,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 661 flow. Second operand has 12 states, 12 states have (on average 53.25) internal successors, (639), 12 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:30,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:30,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:30,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:30,783 INFO L130 PetriNetUnfolder]: 232/475 cut-off events. [2023-01-28 04:12:30,783 INFO L131 PetriNetUnfolder]: For 1632/1632 co-relation queries the response was YES. [2023-01-28 04:12:30,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 475 events. 232/475 cut-off events. For 1632/1632 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2259 event pairs, 11 based on Foata normal form. 34/509 useless extension candidates. Maximal degree in co-relation 1710. Up to 204 conditions per place. [2023-01-28 04:12:30,786 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 76 selfloop transitions, 46 changer transitions 7/129 dead transitions. [2023-01-28 04:12:30,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1160 flow [2023-01-28 04:12:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 04:12:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 04:12:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 802 transitions. [2023-01-28 04:12:30,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546485260770975 [2023-01-28 04:12:30,788 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 802 transitions. [2023-01-28 04:12:30,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 802 transitions. [2023-01-28 04:12:30,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:30,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 802 transitions. [2023-01-28 04:12:30,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.285714285714285) internal successors, (802), 14 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:30,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:30,793 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:30,793 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 661 flow. Second operand 14 states and 802 transitions. [2023-01-28 04:12:30,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1160 flow [2023-01-28 04:12:30,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 129 transitions, 1079 flow, removed 35 selfloop flow, removed 5 redundant places. [2023-01-28 04:12:30,801 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 756 flow [2023-01-28 04:12:30,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=756, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-01-28 04:12:30,801 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2023-01-28 04:12:30,801 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 756 flow [2023-01-28 04:12:30,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.25) internal successors, (639), 12 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:30,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:30,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:30,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:31,010 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 [2023-01-28 04:12:31,010 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:31,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:31,011 INFO L85 PathProgramCache]: Analyzing trace with hash -862014729, now seen corresponding path program 5 times [2023-01-28 04:12:31,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:31,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224110996] [2023-01-28 04:12:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:31,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:31,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:31,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224110996] [2023-01-28 04:12:31,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224110996] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:31,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194849694] [2023-01-28 04:12:31,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:12:31,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:31,064 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) [2023-01-28 04:12:31,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 04:12:31,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 04:12:31,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:31,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:12:31,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:31,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:31,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194849694] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:31,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:31,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 04:12:31,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127358315] [2023-01-28 04:12:31,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:31,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:12:31,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:31,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:12:31,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:12:31,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:31,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 756 flow. Second operand has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:31,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:31,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:31,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:31,397 INFO L130 PetriNetUnfolder]: 294/606 cut-off events. [2023-01-28 04:12:31,398 INFO L131 PetriNetUnfolder]: For 2190/2190 co-relation queries the response was YES. [2023-01-28 04:12:31,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 606 events. 294/606 cut-off events. For 2190/2190 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2988 event pairs, 63 based on Foata normal form. 42/648 useless extension candidates. Maximal degree in co-relation 2237. Up to 320 conditions per place. [2023-01-28 04:12:31,401 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 105 selfloop transitions, 47 changer transitions 3/155 dead transitions. [2023-01-28 04:12:31,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 155 transitions, 1536 flow [2023-01-28 04:12:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 04:12:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 04:12:31,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 754 transitions. [2023-01-28 04:12:31,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2023-01-28 04:12:31,403 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 754 transitions. [2023-01-28 04:12:31,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 754 transitions. [2023-01-28 04:12:31,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:31,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 754 transitions. [2023-01-28 04:12:31,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:31,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 126.0) internal successors, (1764), 14 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:31,407 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 126.0) internal successors, (1764), 14 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:31,407 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 756 flow. Second operand 13 states and 754 transitions. [2023-01-28 04:12:31,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 155 transitions, 1536 flow [2023-01-28 04:12:31,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 155 transitions, 1481 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-01-28 04:12:31,416 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 1164 flow [2023-01-28 04:12:31,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1164, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2023-01-28 04:12:31,416 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2023-01-28 04:12:31,416 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 1164 flow [2023-01-28 04:12:31,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:31,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:31,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:31,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:31,621 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 [2023-01-28 04:12:31,621 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:31,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:31,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1875695203, now seen corresponding path program 6 times [2023-01-28 04:12:31,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:31,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622079044] [2023-01-28 04:12:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:31,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:31,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:31,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622079044] [2023-01-28 04:12:31,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622079044] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:31,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881057285] [2023-01-28 04:12:31,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:12:31,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:31,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:31,666 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) [2023-01-28 04:12:31,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 04:12:31,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:12:31,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:31,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:12:31,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:31,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:31,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881057285] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:31,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:31,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 04:12:31,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084662854] [2023-01-28 04:12:31,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:31,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 04:12:31,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 04:12:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:12:31,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:31,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 1164 flow. Second operand has 13 states, 13 states have (on average 52.92307692307692) internal successors, (688), 13 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:31,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:31,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:31,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:32,003 INFO L130 PetriNetUnfolder]: 309/631 cut-off events. [2023-01-28 04:12:32,003 INFO L131 PetriNetUnfolder]: For 4210/4210 co-relation queries the response was YES. [2023-01-28 04:12:32,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3312 conditions, 631 events. 309/631 cut-off events. For 4210/4210 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3138 event pairs, 32 based on Foata normal form. 6/637 useless extension candidates. Maximal degree in co-relation 2877. Up to 177 conditions per place. [2023-01-28 04:12:32,007 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 85 selfloop transitions, 69 changer transitions 8/162 dead transitions. [2023-01-28 04:12:32,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 162 transitions, 1906 flow [2023-01-28 04:12:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 04:12:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 04:12:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 953 transitions. [2023-01-28 04:12:32,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4449112978524743 [2023-01-28 04:12:32,010 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 953 transitions. [2023-01-28 04:12:32,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 953 transitions. [2023-01-28 04:12:32,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:32,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 953 transitions. [2023-01-28 04:12:32,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 56.05882352941177) internal successors, (953), 17 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:32,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 126.0) internal successors, (2268), 18 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:32,016 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 126.0) internal successors, (2268), 18 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:32,016 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 1164 flow. Second operand 17 states and 953 transitions. [2023-01-28 04:12:32,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 162 transitions, 1906 flow [2023-01-28 04:12:32,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 162 transitions, 1674 flow, removed 105 selfloop flow, removed 3 redundant places. [2023-01-28 04:12:32,039 INFO L231 Difference]: Finished difference. Result has 108 places, 117 transitions, 1294 flow [2023-01-28 04:12:32,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1294, PETRI_PLACES=108, PETRI_TRANSITIONS=117} [2023-01-28 04:12:32,040 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-01-28 04:12:32,040 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 117 transitions, 1294 flow [2023-01-28 04:12:32,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 52.92307692307692) internal successors, (688), 13 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:32,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:32,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:32,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:32,245 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 [2023-01-28 04:12:32,246 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:32,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:32,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1755297934, now seen corresponding path program 7 times [2023-01-28 04:12:32,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:32,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454523128] [2023-01-28 04:12:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:32,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:12:32,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:32,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454523128] [2023-01-28 04:12:32,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454523128] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:32,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944177682] [2023-01-28 04:12:32,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:12:32,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:32,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:32,309 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) [2023-01-28 04:12:32,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 04:12:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:32,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 04:12:32,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:12:32,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:12:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944177682] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:32,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:32,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-01-28 04:12:32,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716122554] [2023-01-28 04:12:32,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:32,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:12:32,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:32,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:12:32,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:12:32,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 126 [2023-01-28 04:12:32,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 117 transitions, 1294 flow. Second operand has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:32,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:32,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 126 [2023-01-28 04:12:32,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:32,554 INFO L130 PetriNetUnfolder]: 525/1068 cut-off events. [2023-01-28 04:12:32,555 INFO L131 PetriNetUnfolder]: For 6835/6846 co-relation queries the response was YES. [2023-01-28 04:12:32,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5774 conditions, 1068 events. 525/1068 cut-off events. For 6835/6846 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6186 event pairs, 57 based on Foata normal form. 30/1096 useless extension candidates. Maximal degree in co-relation 5470. Up to 464 conditions per place. [2023-01-28 04:12:32,560 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 124 selfloop transitions, 58 changer transitions 47/236 dead transitions. [2023-01-28 04:12:32,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 236 transitions, 2948 flow [2023-01-28 04:12:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:12:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:12:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 351 transitions. [2023-01-28 04:12:32,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2023-01-28 04:12:32,561 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 351 transitions. [2023-01-28 04:12:32,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 351 transitions. [2023-01-28 04:12:32,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:32,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 351 transitions. [2023-01-28 04:12:32,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:32,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:32,563 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:32,563 INFO L175 Difference]: Start difference. First operand has 108 places, 117 transitions, 1294 flow. Second operand 5 states and 351 transitions. [2023-01-28 04:12:32,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 236 transitions, 2948 flow [2023-01-28 04:12:32,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 236 transitions, 2774 flow, removed 68 selfloop flow, removed 3 redundant places. [2023-01-28 04:12:32,581 INFO L231 Difference]: Finished difference. Result has 111 places, 154 transitions, 1950 flow [2023-01-28 04:12:32,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1950, PETRI_PLACES=111, PETRI_TRANSITIONS=154} [2023-01-28 04:12:32,581 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2023-01-28 04:12:32,581 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 154 transitions, 1950 flow [2023-01-28 04:12:32,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:32,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:32,582 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:32,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:32,786 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 [2023-01-28 04:12:32,787 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:32,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:32,787 INFO L85 PathProgramCache]: Analyzing trace with hash 717592001, now seen corresponding path program 8 times [2023-01-28 04:12:32,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:32,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571410565] [2023-01-28 04:12:32,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:32,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:32,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:32,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571410565] [2023-01-28 04:12:32,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571410565] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:32,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477058028] [2023-01-28 04:12:32,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:12:32,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:32,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:32,839 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) [2023-01-28 04:12:32,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 04:12:32,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:12:32,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:32,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:12:32,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:32,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:32,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477058028] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:32,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:32,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-01-28 04:12:32,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871574491] [2023-01-28 04:12:32,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:32,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:12:32,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:32,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:12:32,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:12:32,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:32,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 154 transitions, 1950 flow. Second operand has 15 states, 15 states have (on average 52.86666666666667) internal successors, (793), 15 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:32,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:32,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:32,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:33,554 INFO L130 PetriNetUnfolder]: 680/1466 cut-off events. [2023-01-28 04:12:33,554 INFO L131 PetriNetUnfolder]: For 12423/12423 co-relation queries the response was YES. [2023-01-28 04:12:33,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8575 conditions, 1466 events. 680/1466 cut-off events. For 12423/12423 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9563 event pairs, 15 based on Foata normal form. 24/1490 useless extension candidates. Maximal degree in co-relation 8303. Up to 331 conditions per place. [2023-01-28 04:12:33,568 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 152 selfloop transitions, 156 changer transitions 21/329 dead transitions. [2023-01-28 04:12:33,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 329 transitions, 4265 flow [2023-01-28 04:12:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 04:12:33,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 04:12:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1857 transitions. [2023-01-28 04:12:33,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466089466089466 [2023-01-28 04:12:33,573 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1857 transitions. [2023-01-28 04:12:33,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1857 transitions. [2023-01-28 04:12:33,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:33,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1857 transitions. [2023-01-28 04:12:33,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 56.27272727272727) internal successors, (1857), 33 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:33,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 126.0) internal successors, (4284), 34 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:33,588 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 126.0) internal successors, (4284), 34 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:33,588 INFO L175 Difference]: Start difference. First operand has 111 places, 154 transitions, 1950 flow. Second operand 33 states and 1857 transitions. [2023-01-28 04:12:33,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 329 transitions, 4265 flow [2023-01-28 04:12:33,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 329 transitions, 4097 flow, removed 62 selfloop flow, removed 1 redundant places. [2023-01-28 04:12:33,648 INFO L231 Difference]: Finished difference. Result has 155 places, 224 transitions, 3489 flow [2023-01-28 04:12:33,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3489, PETRI_PLACES=155, PETRI_TRANSITIONS=224} [2023-01-28 04:12:33,649 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2023-01-28 04:12:33,649 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 224 transitions, 3489 flow [2023-01-28 04:12:33,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.86666666666667) internal successors, (793), 15 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:33,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:33,650 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:33,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:33,854 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 [2023-01-28 04:12:33,854 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:33,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:33,855 INFO L85 PathProgramCache]: Analyzing trace with hash 694726189, now seen corresponding path program 9 times [2023-01-28 04:12:33,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:33,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680002880] [2023-01-28 04:12:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:33,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:33,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:33,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680002880] [2023-01-28 04:12:33,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680002880] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:33,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989878622] [2023-01-28 04:12:33,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:12:33,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:33,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:33,914 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) [2023-01-28 04:12:33,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 04:12:33,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 04:12:33,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:33,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:12:33,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:34,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:34,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989878622] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:34,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:34,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-01-28 04:12:34,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291844619] [2023-01-28 04:12:34,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:34,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 04:12:34,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:34,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 04:12:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-01-28 04:12:34,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:34,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 224 transitions, 3489 flow. Second operand has 14 states, 14 states have (on average 52.857142857142854) internal successors, (740), 14 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:34,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:34,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:34,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:34,352 INFO L130 PetriNetUnfolder]: 767/1617 cut-off events. [2023-01-28 04:12:34,352 INFO L131 PetriNetUnfolder]: For 23775/23775 co-relation queries the response was YES. [2023-01-28 04:12:34,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11155 conditions, 1617 events. 767/1617 cut-off events. For 23775/23775 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10612 event pairs, 95 based on Foata normal form. 36/1653 useless extension candidates. Maximal degree in co-relation 10864. Up to 1257 conditions per place. [2023-01-28 04:12:34,365 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 239 selfloop transitions, 50 changer transitions 24/313 dead transitions. [2023-01-28 04:12:34,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 313 transitions, 5327 flow [2023-01-28 04:12:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:12:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:12:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 519 transitions. [2023-01-28 04:12:34,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2023-01-28 04:12:34,367 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 519 transitions. [2023-01-28 04:12:34,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 519 transitions. [2023-01-28 04:12:34,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:34,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 519 transitions. [2023-01-28 04:12:34,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:34,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 126.0) internal successors, (1260), 10 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:34,370 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 126.0) internal successors, (1260), 10 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:34,370 INFO L175 Difference]: Start difference. First operand has 155 places, 224 transitions, 3489 flow. Second operand 9 states and 519 transitions. [2023-01-28 04:12:34,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 313 transitions, 5327 flow [2023-01-28 04:12:34,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 313 transitions, 4341 flow, removed 418 selfloop flow, removed 12 redundant places. [2023-01-28 04:12:34,478 INFO L231 Difference]: Finished difference. Result has 153 places, 252 transitions, 3402 flow [2023-01-28 04:12:34,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3402, PETRI_PLACES=153, PETRI_TRANSITIONS=252} [2023-01-28 04:12:34,481 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-01-28 04:12:34,481 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 252 transitions, 3402 flow [2023-01-28 04:12:34,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.857142857142854) internal successors, (740), 14 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:34,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:34,481 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:34,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:34,685 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 [2023-01-28 04:12:34,685 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:34,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:34,686 INFO L85 PathProgramCache]: Analyzing trace with hash -462692187, now seen corresponding path program 10 times [2023-01-28 04:12:34,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:34,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027255815] [2023-01-28 04:12:34,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:34,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:34,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:34,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027255815] [2023-01-28 04:12:34,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027255815] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:34,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159222608] [2023-01-28 04:12:34,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:12:34,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:34,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:34,762 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) [2023-01-28 04:12:34,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 04:12:34,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:12:34,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:34,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:12:34,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:34,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:34,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159222608] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:34,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:34,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-28 04:12:34,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966844467] [2023-01-28 04:12:34,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:34,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 04:12:34,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:34,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 04:12:34,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-01-28 04:12:34,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:34,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 252 transitions, 3402 flow. Second operand has 16 states, 16 states have (on average 52.9375) internal successors, (847), 16 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:34,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:34,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:34,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:35,300 INFO L130 PetriNetUnfolder]: 934/1910 cut-off events. [2023-01-28 04:12:35,300 INFO L131 PetriNetUnfolder]: For 27065/27065 co-relation queries the response was YES. [2023-01-28 04:12:35,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12391 conditions, 1910 events. 934/1910 cut-off events. For 27065/27065 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 12701 event pairs, 81 based on Foata normal form. 78/1988 useless extension candidates. Maximal degree in co-relation 12100. Up to 1501 conditions per place. [2023-01-28 04:12:35,316 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 271 selfloop transitions, 90 changer transitions 3/364 dead transitions. [2023-01-28 04:12:35,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 364 transitions, 5451 flow [2023-01-28 04:12:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 04:12:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 04:12:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 800 transitions. [2023-01-28 04:12:35,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45351473922902497 [2023-01-28 04:12:35,318 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 800 transitions. [2023-01-28 04:12:35,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 800 transitions. [2023-01-28 04:12:35,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:35,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 800 transitions. [2023-01-28 04:12:35,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.142857142857146) internal successors, (800), 14 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:35,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:35,321 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:35,322 INFO L175 Difference]: Start difference. First operand has 153 places, 252 transitions, 3402 flow. Second operand 14 states and 800 transitions. [2023-01-28 04:12:35,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 364 transitions, 5451 flow [2023-01-28 04:12:35,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 364 transitions, 5377 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-01-28 04:12:35,425 INFO L231 Difference]: Finished difference. Result has 167 places, 300 transitions, 4482 flow [2023-01-28 04:12:35,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4482, PETRI_PLACES=167, PETRI_TRANSITIONS=300} [2023-01-28 04:12:35,426 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 147 predicate places. [2023-01-28 04:12:35,426 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 300 transitions, 4482 flow [2023-01-28 04:12:35,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 52.9375) internal successors, (847), 16 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:35,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:35,427 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:35,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-28 04:12:35,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 04:12:35,631 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:35,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:35,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2059593163, now seen corresponding path program 11 times [2023-01-28 04:12:35,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:35,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740349074] [2023-01-28 04:12:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:35,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:35,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:35,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740349074] [2023-01-28 04:12:35,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740349074] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:35,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611883688] [2023-01-28 04:12:35,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:12:35,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:35,699 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:12:35,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 04:12:35,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 04:12:35,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:35,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:12:35,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:35,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:35,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611883688] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:35,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:35,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-01-28 04:12:35,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432171137] [2023-01-28 04:12:35,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:35,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:12:35,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:35,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:12:35,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:12:35,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:35,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 300 transitions, 4482 flow. Second operand has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:35,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:35,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:35,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:36,312 INFO L130 PetriNetUnfolder]: 898/1821 cut-off events. [2023-01-28 04:12:36,312 INFO L131 PetriNetUnfolder]: For 29203/29203 co-relation queries the response was YES. [2023-01-28 04:12:36,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12625 conditions, 1821 events. 898/1821 cut-off events. For 29203/29203 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11848 event pairs, 45 based on Foata normal form. 62/1883 useless extension candidates. Maximal degree in co-relation 12330. Up to 592 conditions per place. [2023-01-28 04:12:36,326 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 178 selfloop transitions, 189 changer transitions 1/368 dead transitions. [2023-01-28 04:12:36,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 368 transitions, 5690 flow [2023-01-28 04:12:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 04:12:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 04:12:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1250 transitions. [2023-01-28 04:12:36,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4509379509379509 [2023-01-28 04:12:36,328 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1250 transitions. [2023-01-28 04:12:36,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1250 transitions. [2023-01-28 04:12:36,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:36,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1250 transitions. [2023-01-28 04:12:36,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 56.81818181818182) internal successors, (1250), 22 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:36,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 126.0) internal successors, (2898), 23 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:36,332 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 126.0) internal successors, (2898), 23 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:36,332 INFO L175 Difference]: Start difference. First operand has 167 places, 300 transitions, 4482 flow. Second operand 22 states and 1250 transitions. [2023-01-28 04:12:36,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 368 transitions, 5690 flow [2023-01-28 04:12:36,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 368 transitions, 5453 flow, removed 100 selfloop flow, removed 7 redundant places. [2023-01-28 04:12:36,465 INFO L231 Difference]: Finished difference. Result has 182 places, 297 transitions, 4752 flow [2023-01-28 04:12:36,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=4150, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4752, PETRI_PLACES=182, PETRI_TRANSITIONS=297} [2023-01-28 04:12:36,466 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 162 predicate places. [2023-01-28 04:12:36,466 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 297 transitions, 4752 flow [2023-01-28 04:12:36,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:36,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:36,466 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:36,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:36,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:36,669 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:36,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:36,669 INFO L85 PathProgramCache]: Analyzing trace with hash 306499919, now seen corresponding path program 12 times [2023-01-28 04:12:36,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:36,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325708269] [2023-01-28 04:12:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:36,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:36,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:36,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325708269] [2023-01-28 04:12:36,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325708269] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:36,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743839609] [2023-01-28 04:12:36,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:12:36,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:36,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:36,745 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:12:36,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 04:12:36,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:12:36,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:36,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:12:36,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:36,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:36,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743839609] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:36,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:36,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-01-28 04:12:36,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303131053] [2023-01-28 04:12:36,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:36,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:12:36,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:36,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:12:36,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:12:36,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:36,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 297 transitions, 4752 flow. Second operand has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:36,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:36,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:36,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:37,547 INFO L130 PetriNetUnfolder]: 1322/2652 cut-off events. [2023-01-28 04:12:37,548 INFO L131 PetriNetUnfolder]: For 42197/42197 co-relation queries the response was YES. [2023-01-28 04:12:37,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19147 conditions, 2652 events. 1322/2652 cut-off events. For 42197/42197 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18444 event pairs, 73 based on Foata normal form. 74/2726 useless extension candidates. Maximal degree in co-relation 18852. Up to 1100 conditions per place. [2023-01-28 04:12:37,571 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 245 selfloop transitions, 274 changer transitions 8/527 dead transitions. [2023-01-28 04:12:37,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 527 transitions, 9054 flow [2023-01-28 04:12:37,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 04:12:37,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 04:12:37,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1197 transitions. [2023-01-28 04:12:37,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2023-01-28 04:12:37,573 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1197 transitions. [2023-01-28 04:12:37,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1197 transitions. [2023-01-28 04:12:37,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:37,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1197 transitions. [2023-01-28 04:12:37,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.0) internal successors, (1197), 21 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:37,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 126.0) internal successors, (2772), 22 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:37,586 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 126.0) internal successors, (2772), 22 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:37,586 INFO L175 Difference]: Start difference. First operand has 182 places, 297 transitions, 4752 flow. Second operand 21 states and 1197 transitions. [2023-01-28 04:12:37,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 527 transitions, 9054 flow [2023-01-28 04:12:37,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 527 transitions, 8656 flow, removed 67 selfloop flow, removed 16 redundant places. [2023-01-28 04:12:37,759 INFO L231 Difference]: Finished difference. Result has 194 places, 431 transitions, 7829 flow [2023-01-28 04:12:37,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=4519, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7829, PETRI_PLACES=194, PETRI_TRANSITIONS=431} [2023-01-28 04:12:37,759 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-01-28 04:12:37,760 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 431 transitions, 7829 flow [2023-01-28 04:12:37,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:37,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:37,760 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:37,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:37,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:37,961 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:37,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:37,961 INFO L85 PathProgramCache]: Analyzing trace with hash 824419987, now seen corresponding path program 13 times [2023-01-28 04:12:37,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:37,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448741156] [2023-01-28 04:12:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:37,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:38,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:38,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448741156] [2023-01-28 04:12:38,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448741156] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:38,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105244979] [2023-01-28 04:12:38,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:12:38,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:38,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:38,049 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:12:38,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 04:12:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:38,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:12:38,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:38,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:38,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105244979] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:38,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:38,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-28 04:12:38,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425007671] [2023-01-28 04:12:38,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:38,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:12:38,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:38,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:12:38,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-01-28 04:12:38,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:38,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 431 transitions, 7829 flow. Second operand has 20 states, 20 states have (on average 52.6) internal successors, (1052), 20 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:38,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:38,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:38,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:38,958 INFO L130 PetriNetUnfolder]: 1429/2857 cut-off events. [2023-01-28 04:12:38,958 INFO L131 PetriNetUnfolder]: For 62333/62333 co-relation queries the response was YES. [2023-01-28 04:12:38,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22775 conditions, 2857 events. 1429/2857 cut-off events. For 62333/62333 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 19981 event pairs, 422 based on Foata normal form. 104/2961 useless extension candidates. Maximal degree in co-relation 22294. Up to 2077 conditions per place. [2023-01-28 04:12:38,979 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 424 selfloop transitions, 133 changer transitions 14/571 dead transitions. [2023-01-28 04:12:38,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 571 transitions, 10771 flow [2023-01-28 04:12:38,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 04:12:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 04:12:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1212 transitions. [2023-01-28 04:12:38,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4580498866213152 [2023-01-28 04:12:38,981 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1212 transitions. [2023-01-28 04:12:38,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1212 transitions. [2023-01-28 04:12:38,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:38,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1212 transitions. [2023-01-28 04:12:38,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.714285714285715) internal successors, (1212), 21 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:38,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 126.0) internal successors, (2772), 22 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:38,985 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 126.0) internal successors, (2772), 22 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:38,985 INFO L175 Difference]: Start difference. First operand has 194 places, 431 transitions, 7829 flow. Second operand 21 states and 1212 transitions. [2023-01-28 04:12:38,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 571 transitions, 10771 flow [2023-01-28 04:12:39,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 571 transitions, 10358 flow, removed 180 selfloop flow, removed 8 redundant places. [2023-01-28 04:12:39,328 INFO L231 Difference]: Finished difference. Result has 216 places, 482 transitions, 9144 flow [2023-01-28 04:12:39,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=7416, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9144, PETRI_PLACES=216, PETRI_TRANSITIONS=482} [2023-01-28 04:12:39,328 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 196 predicate places. [2023-01-28 04:12:39,329 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 482 transitions, 9144 flow [2023-01-28 04:12:39,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.6) internal successors, (1052), 20 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:39,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:39,329 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:39,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:39,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:39,529 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:39,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:39,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1134645313, now seen corresponding path program 14 times [2023-01-28 04:12:39,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:39,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262196389] [2023-01-28 04:12:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:39,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:39,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:39,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262196389] [2023-01-28 04:12:39,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262196389] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:39,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357221806] [2023-01-28 04:12:39,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:12:39,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:39,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:39,593 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:12:39,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 04:12:39,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:12:39,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:39,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:12:39,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:39,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:39,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357221806] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:39,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:39,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-01-28 04:12:39,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623535815] [2023-01-28 04:12:39,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:39,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 04:12:39,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:39,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 04:12:39,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-01-28 04:12:39,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:39,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 482 transitions, 9144 flow. Second operand has 17 states, 17 states have (on average 52.76470588235294) internal successors, (897), 17 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:39,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:39,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:39,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:40,573 INFO L130 PetriNetUnfolder]: 1464/2908 cut-off events. [2023-01-28 04:12:40,573 INFO L131 PetriNetUnfolder]: For 69173/69173 co-relation queries the response was YES. [2023-01-28 04:12:40,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23923 conditions, 2908 events. 1464/2908 cut-off events. For 69173/69173 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20342 event pairs, 155 based on Foata normal form. 6/2914 useless extension candidates. Maximal degree in co-relation 23182. Up to 922 conditions per place. [2023-01-28 04:12:40,595 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 298 selfloop transitions, 271 changer transitions 11/580 dead transitions. [2023-01-28 04:12:40,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 580 transitions, 11436 flow [2023-01-28 04:12:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 04:12:40,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 04:12:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1447 transitions. [2023-01-28 04:12:40,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4416971916971917 [2023-01-28 04:12:40,598 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1447 transitions. [2023-01-28 04:12:40,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1447 transitions. [2023-01-28 04:12:40,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:40,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1447 transitions. [2023-01-28 04:12:40,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.65384615384615) internal successors, (1447), 26 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:40,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 126.0) internal successors, (3402), 27 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:40,603 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 126.0) internal successors, (3402), 27 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:40,603 INFO L175 Difference]: Start difference. First operand has 216 places, 482 transitions, 9144 flow. Second operand 26 states and 1447 transitions. [2023-01-28 04:12:40,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 580 transitions, 11436 flow [2023-01-28 04:12:41,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 580 transitions, 10269 flow, removed 579 selfloop flow, removed 3 redundant places. [2023-01-28 04:12:41,095 INFO L231 Difference]: Finished difference. Result has 242 places, 515 transitions, 9316 flow [2023-01-28 04:12:41,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=8199, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9316, PETRI_PLACES=242, PETRI_TRANSITIONS=515} [2023-01-28 04:12:41,095 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2023-01-28 04:12:41,095 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 515 transitions, 9316 flow [2023-01-28 04:12:41,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 52.76470588235294) internal successors, (897), 17 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:41,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:41,096 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:41,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:41,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:41,300 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:41,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1355573420, now seen corresponding path program 15 times [2023-01-28 04:12:41,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:41,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893450017] [2023-01-28 04:12:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:41,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:12:41,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:41,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893450017] [2023-01-28 04:12:41,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893450017] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:41,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505210474] [2023-01-28 04:12:41,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:12:41,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:41,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:41,379 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:12:41,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 04:12:41,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 04:12:41,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:41,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 04:12:41,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:12:41,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:12:41,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505210474] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:41,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:41,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-01-28 04:12:41,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334051326] [2023-01-28 04:12:41,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:41,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 04:12:41,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:41,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 04:12:41,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-28 04:12:41,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 126 [2023-01-28 04:12:41,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 515 transitions, 9316 flow. Second operand has 6 states, 6 states have (on average 63.833333333333336) internal successors, (383), 6 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:41,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:41,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 126 [2023-01-28 04:12:41,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:42,425 INFO L130 PetriNetUnfolder]: 2182/4290 cut-off events. [2023-01-28 04:12:42,425 INFO L131 PetriNetUnfolder]: For 92299/92309 co-relation queries the response was YES. [2023-01-28 04:12:42,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34579 conditions, 4290 events. 2182/4290 cut-off events. For 92299/92309 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 32229 event pairs, 185 based on Foata normal form. 35/4323 useless extension candidates. Maximal degree in co-relation 33385. Up to 2162 conditions per place. [2023-01-28 04:12:42,460 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 469 selfloop transitions, 286 changer transitions 101/864 dead transitions. [2023-01-28 04:12:42,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 864 transitions, 16916 flow [2023-01-28 04:12:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 04:12:42,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 04:12:42,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 423 transitions. [2023-01-28 04:12:42,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2023-01-28 04:12:42,462 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 423 transitions. [2023-01-28 04:12:42,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 423 transitions. [2023-01-28 04:12:42,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:42,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 423 transitions. [2023-01-28 04:12:42,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:42,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 126.0) internal successors, (882), 7 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:42,463 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 126.0) internal successors, (882), 7 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:42,463 INFO L175 Difference]: Start difference. First operand has 242 places, 515 transitions, 9316 flow. Second operand 6 states and 423 transitions. [2023-01-28 04:12:42,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 864 transitions, 16916 flow [2023-01-28 04:12:43,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 864 transitions, 16372 flow, removed 222 selfloop flow, removed 8 redundant places. [2023-01-28 04:12:43,029 INFO L231 Difference]: Finished difference. Result has 242 places, 684 transitions, 13471 flow [2023-01-28 04:12:43,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=9037, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13471, PETRI_PLACES=242, PETRI_TRANSITIONS=684} [2023-01-28 04:12:43,030 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2023-01-28 04:12:43,030 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 684 transitions, 13471 flow [2023-01-28 04:12:43,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.833333333333336) internal successors, (383), 6 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:43,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:43,030 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:43,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:43,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:43,231 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:43,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:43,231 INFO L85 PathProgramCache]: Analyzing trace with hash 937724473, now seen corresponding path program 16 times [2023-01-28 04:12:43,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:43,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765566994] [2023-01-28 04:12:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:43,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:43,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:43,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765566994] [2023-01-28 04:12:43,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765566994] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:43,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365538993] [2023-01-28 04:12:43,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:12:43,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:43,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:43,315 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:12:43,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 04:12:43,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:12:43,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:43,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:12:43,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:43,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:43,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365538993] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:43,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:43,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-01-28 04:12:43,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106673089] [2023-01-28 04:12:43,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:43,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 04:12:43,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:43,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 04:12:43,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-01-28 04:12:43,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:43,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 684 transitions, 13471 flow. Second operand has 17 states, 17 states have (on average 52.88235294117647) internal successors, (899), 17 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:43,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:43,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:43,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:44,718 INFO L130 PetriNetUnfolder]: 2484/4916 cut-off events. [2023-01-28 04:12:44,718 INFO L131 PetriNetUnfolder]: For 122289/122289 co-relation queries the response was YES. [2023-01-28 04:12:44,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42195 conditions, 4916 events. 2484/4916 cut-off events. For 122289/122289 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38076 event pairs, 185 based on Foata normal form. 50/4966 useless extension candidates. Maximal degree in co-relation 40527. Up to 3712 conditions per place. [2023-01-28 04:12:44,756 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 697 selfloop transitions, 187 changer transitions 49/933 dead transitions. [2023-01-28 04:12:44,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 933 transitions, 19844 flow [2023-01-28 04:12:44,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 04:12:44,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 04:12:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2023-01-28 04:12:44,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2023-01-28 04:12:44,757 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2023-01-28 04:12:44,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2023-01-28 04:12:44,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:44,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2023-01-28 04:12:44,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:44,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:44,759 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:44,759 INFO L175 Difference]: Start difference. First operand has 242 places, 684 transitions, 13471 flow. Second operand 11 states and 638 transitions. [2023-01-28 04:12:44,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 933 transitions, 19844 flow [2023-01-28 04:12:45,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 933 transitions, 19424 flow, removed 210 selfloop flow, removed 0 redundant places. [2023-01-28 04:12:45,582 INFO L231 Difference]: Finished difference. Result has 258 places, 808 transitions, 16838 flow [2023-01-28 04:12:45,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=13109, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16838, PETRI_PLACES=258, PETRI_TRANSITIONS=808} [2023-01-28 04:12:45,583 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 238 predicate places. [2023-01-28 04:12:45,583 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 808 transitions, 16838 flow [2023-01-28 04:12:45,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 52.88235294117647) internal successors, (899), 17 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:45,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:45,584 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:45,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:45,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:45,784 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:45,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:45,785 INFO L85 PathProgramCache]: Analyzing trace with hash 778832195, now seen corresponding path program 17 times [2023-01-28 04:12:45,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:45,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114583193] [2023-01-28 04:12:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:45,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:45,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:45,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114583193] [2023-01-28 04:12:45,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114583193] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:45,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121959258] [2023-01-28 04:12:45,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:12:45,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:45,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:45,866 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:12:45,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 04:12:45,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 04:12:45,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:45,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:12:45,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:45,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:46,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121959258] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:46,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:46,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-01-28 04:12:46,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467147534] [2023-01-28 04:12:46,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:46,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 04:12:46,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:46,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 04:12:46,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-01-28 04:12:46,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:46,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 808 transitions, 16838 flow. Second operand has 19 states, 19 states have (on average 52.63157894736842) internal successors, (1000), 19 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:46,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:46,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:46,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:47,740 INFO L130 PetriNetUnfolder]: 2839/5577 cut-off events. [2023-01-28 04:12:47,741 INFO L131 PetriNetUnfolder]: For 152962/152962 co-relation queries the response was YES. [2023-01-28 04:12:47,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49100 conditions, 5577 events. 2839/5577 cut-off events. For 152962/152962 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 43575 event pairs, 215 based on Foata normal form. 84/5661 useless extension candidates. Maximal degree in co-relation 47417. Up to 4193 conditions per place. [2023-01-28 04:12:47,796 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 763 selfloop transitions, 252 changer transitions 16/1031 dead transitions. [2023-01-28 04:12:47,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 1031 transitions, 22755 flow [2023-01-28 04:12:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 04:12:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 04:12:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 974 transitions. [2023-01-28 04:12:47,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45471521942110177 [2023-01-28 04:12:47,797 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 974 transitions. [2023-01-28 04:12:47,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 974 transitions. [2023-01-28 04:12:47,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:47,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 974 transitions. [2023-01-28 04:12:47,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.294117647058826) internal successors, (974), 17 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:47,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 126.0) internal successors, (2268), 18 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:47,801 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 126.0) internal successors, (2268), 18 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:47,801 INFO L175 Difference]: Start difference. First operand has 258 places, 808 transitions, 16838 flow. Second operand 17 states and 974 transitions. [2023-01-28 04:12:47,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 1031 transitions, 22755 flow [2023-01-28 04:12:49,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 1031 transitions, 22534 flow, removed 93 selfloop flow, removed 4 redundant places. [2023-01-28 04:12:49,202 INFO L231 Difference]: Finished difference. Result has 276 places, 908 transitions, 19905 flow [2023-01-28 04:12:49,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=16691, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=19905, PETRI_PLACES=276, PETRI_TRANSITIONS=908} [2023-01-28 04:12:49,203 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-01-28 04:12:49,203 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 908 transitions, 19905 flow [2023-01-28 04:12:49,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 52.63157894736842) internal successors, (1000), 19 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:49,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:49,203 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:49,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:49,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-28 04:12:49,404 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:49,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1597199923, now seen corresponding path program 18 times [2023-01-28 04:12:49,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:49,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733725665] [2023-01-28 04:12:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:49,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:49,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:49,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733725665] [2023-01-28 04:12:49,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733725665] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:49,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912568771] [2023-01-28 04:12:49,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:12:49,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:49,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:49,472 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:12:49,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 04:12:49,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-01-28 04:12:49,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:12:49,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:12:49,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:49,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:49,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912568771] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:49,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:49,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-01-28 04:12:49,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492516400] [2023-01-28 04:12:49,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:49,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 04:12:49,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:49,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 04:12:49,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-01-28 04:12:49,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:49,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 908 transitions, 19905 flow. Second operand has 18 states, 18 states have (on average 52.666666666666664) internal successors, (948), 18 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:49,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:49,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:49,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:52,264 INFO L130 PetriNetUnfolder]: 3334/6619 cut-off events. [2023-01-28 04:12:52,264 INFO L131 PetriNetUnfolder]: For 214686/214686 co-relation queries the response was YES. [2023-01-28 04:12:52,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61929 conditions, 6619 events. 3334/6619 cut-off events. For 214686/214686 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 53876 event pairs, 71 based on Foata normal form. 28/6647 useless extension candidates. Maximal degree in co-relation 60241. Up to 1804 conditions per place. [2023-01-28 04:12:52,328 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 323 selfloop transitions, 876 changer transitions 45/1244 dead transitions. [2023-01-28 04:12:52,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1244 transitions, 28036 flow [2023-01-28 04:12:52,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-01-28 04:12:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-01-28 04:12:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2749 transitions. [2023-01-28 04:12:52,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452542921930677 [2023-01-28 04:12:52,331 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2749 transitions. [2023-01-28 04:12:52,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2749 transitions. [2023-01-28 04:12:52,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:52,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2749 transitions. [2023-01-28 04:12:52,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 56.10204081632653) internal successors, (2749), 49 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:52,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 126.0) internal successors, (6300), 50 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:52,339 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 126.0) internal successors, (6300), 50 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:52,339 INFO L175 Difference]: Start difference. First operand has 276 places, 908 transitions, 19905 flow. Second operand 49 states and 2749 transitions. [2023-01-28 04:12:52,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1244 transitions, 28036 flow [2023-01-28 04:12:54,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1244 transitions, 27515 flow, removed 235 selfloop flow, removed 5 redundant places. [2023-01-28 04:12:54,195 INFO L231 Difference]: Finished difference. Result has 328 places, 1079 transitions, 26074 flow [2023-01-28 04:12:54,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=19498, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=730, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=26074, PETRI_PLACES=328, PETRI_TRANSITIONS=1079} [2023-01-28 04:12:54,195 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 308 predicate places. [2023-01-28 04:12:54,195 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 1079 transitions, 26074 flow [2023-01-28 04:12:54,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.666666666666664) internal successors, (948), 18 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:54,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:12:54,196 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:12:54,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 04:12:54,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-01-28 04:12:54,400 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:12:54,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:12:54,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1546373287, now seen corresponding path program 19 times [2023-01-28 04:12:54,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:12:54,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623734817] [2023-01-28 04:12:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:12:54,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:12:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:54,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:12:54,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623734817] [2023-01-28 04:12:54,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623734817] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:12:54,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437920906] [2023-01-28 04:12:54,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:12:54,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:12:54,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:12:54,470 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:12:54,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 04:12:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:12:54,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:12:54,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:12:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:54,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:12:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:12:54,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437920906] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:12:54,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:12:54,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-01-28 04:12:54,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698322570] [2023-01-28 04:12:54,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:12:54,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 04:12:54,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:12:54,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 04:12:54,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-01-28 04:12:54,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:12:54,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 1079 transitions, 26074 flow. Second operand has 18 states, 18 states have (on average 52.833333333333336) internal successors, (951), 18 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:54,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:12:54,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:12:54,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:12:57,661 INFO L130 PetriNetUnfolder]: 3740/7309 cut-off events. [2023-01-28 04:12:57,661 INFO L131 PetriNetUnfolder]: For 300889/300889 co-relation queries the response was YES. [2023-01-28 04:12:57,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73417 conditions, 7309 events. 3740/7309 cut-off events. For 300889/300889 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 59672 event pairs, 207 based on Foata normal form. 206/7515 useless extension candidates. Maximal degree in co-relation 71604. Up to 3448 conditions per place. [2023-01-28 04:12:57,740 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 690 selfloop transitions, 666 changer transitions 15/1371 dead transitions. [2023-01-28 04:12:57,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1371 transitions, 34330 flow [2023-01-28 04:12:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 04:12:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 04:12:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1704 transitions. [2023-01-28 04:12:57,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4507936507936508 [2023-01-28 04:12:57,743 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1704 transitions. [2023-01-28 04:12:57,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1704 transitions. [2023-01-28 04:12:57,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:12:57,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1704 transitions. [2023-01-28 04:12:57,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 56.8) internal successors, (1704), 30 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:57,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 126.0) internal successors, (3906), 31 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:57,748 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 126.0) internal successors, (3906), 31 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:12:57,748 INFO L175 Difference]: Start difference. First operand has 328 places, 1079 transitions, 26074 flow. Second operand 30 states and 1704 transitions. [2023-01-28 04:12:57,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1371 transitions, 34330 flow [2023-01-28 04:13:01,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1371 transitions, 30677 flow, removed 1449 selfloop flow, removed 17 redundant places. [2023-01-28 04:13:01,096 INFO L231 Difference]: Finished difference. Result has 345 places, 1233 transitions, 28990 flow [2023-01-28 04:13:01,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=22899, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=513, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=28990, PETRI_PLACES=345, PETRI_TRANSITIONS=1233} [2023-01-28 04:13:01,097 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 325 predicate places. [2023-01-28 04:13:01,097 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 1233 transitions, 28990 flow [2023-01-28 04:13:01,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.833333333333336) internal successors, (951), 18 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:01,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:13:01,097 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:13:01,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 04:13:01,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 04:13:01,301 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:13:01,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:13:01,302 INFO L85 PathProgramCache]: Analyzing trace with hash 672632607, now seen corresponding path program 20 times [2023-01-28 04:13:01,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:13:01,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042115138] [2023-01-28 04:13:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:13:01,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:13:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:13:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:01,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:13:01,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042115138] [2023-01-28 04:13:01,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042115138] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:13:01,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916059616] [2023-01-28 04:13:01,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:13:01,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:13:01,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:13:01,379 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:13:01,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 04:13:01,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:13:01,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:13:01,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:13:01,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:13:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:01,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:13:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:01,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916059616] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:13:01,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:13:01,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-01-28 04:13:01,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431567739] [2023-01-28 04:13:01,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:13:01,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 04:13:01,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:13:01,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 04:13:01,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-01-28 04:13:01,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:13:01,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1233 transitions, 28990 flow. Second operand has 18 states, 18 states have (on average 52.833333333333336) internal successors, (951), 18 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:01,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:13:01,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:13:01,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:13:04,634 INFO L130 PetriNetUnfolder]: 3694/7225 cut-off events. [2023-01-28 04:13:04,635 INFO L131 PetriNetUnfolder]: For 263741/263741 co-relation queries the response was YES. [2023-01-28 04:13:04,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70732 conditions, 7225 events. 3694/7225 cut-off events. For 263741/263741 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 58818 event pairs, 101 based on Foata normal form. 60/7285 useless extension candidates. Maximal degree in co-relation 68916. Up to 2048 conditions per place. [2023-01-28 04:13:04,698 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 423 selfloop transitions, 919 changer transitions 1/1343 dead transitions. [2023-01-28 04:13:04,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1343 transitions, 32618 flow [2023-01-28 04:13:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 04:13:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 04:13:04,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1980 transitions. [2023-01-28 04:13:04,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2023-01-28 04:13:04,700 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1980 transitions. [2023-01-28 04:13:04,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1980 transitions. [2023-01-28 04:13:04,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:13:04,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1980 transitions. [2023-01-28 04:13:04,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 56.57142857142857) internal successors, (1980), 35 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:04,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 126.0) internal successors, (4536), 36 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:04,705 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 126.0) internal successors, (4536), 36 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:04,705 INFO L175 Difference]: Start difference. First operand has 345 places, 1233 transitions, 28990 flow. Second operand 35 states and 1980 transitions. [2023-01-28 04:13:04,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1343 transitions, 32618 flow [2023-01-28 04:13:07,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1343 transitions, 31888 flow, removed 198 selfloop flow, removed 13 redundant places. [2023-01-28 04:13:07,965 INFO L231 Difference]: Finished difference. Result has 367 places, 1234 transitions, 30706 flow [2023-01-28 04:13:07,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=28114, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=907, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=30706, PETRI_PLACES=367, PETRI_TRANSITIONS=1234} [2023-01-28 04:13:07,967 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 347 predicate places. [2023-01-28 04:13:07,967 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1234 transitions, 30706 flow [2023-01-28 04:13:07,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.833333333333336) internal successors, (951), 18 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:07,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:13:07,967 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:13:07,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-01-28 04:13:08,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:13:08,171 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:13:08,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:13:08,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1182775093, now seen corresponding path program 21 times [2023-01-28 04:13:08,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:13:08,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037777276] [2023-01-28 04:13:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:13:08,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:13:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:13:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:08,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:13:08,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037777276] [2023-01-28 04:13:08,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037777276] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:13:08,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509763132] [2023-01-28 04:13:08,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:13:08,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:13:08,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:13:08,245 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:13:08,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 04:13:08,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 04:13:08,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:13:08,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:13:08,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:13:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:08,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:13:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:13:08,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509763132] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:13:08,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:13:08,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2023-01-28 04:13:08,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30227246] [2023-01-28 04:13:08,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:13:08,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 04:13:08,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:13:08,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 04:13:08,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-01-28 04:13:08,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:13:08,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1234 transitions, 30706 flow. Second operand has 19 states, 19 states have (on average 52.8421052631579) internal successors, (1004), 19 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:08,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:13:08,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:13:08,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:13:11,746 INFO L130 PetriNetUnfolder]: 4156/8089 cut-off events. [2023-01-28 04:13:11,746 INFO L131 PetriNetUnfolder]: For 313538/313538 co-relation queries the response was YES. [2023-01-28 04:13:11,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82105 conditions, 8089 events. 4156/8089 cut-off events. For 313538/313538 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 67099 event pairs, 287 based on Foata normal form. 70/8159 useless extension candidates. Maximal degree in co-relation 80288. Up to 5956 conditions per place. [2023-01-28 04:13:11,828 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 1100 selfloop transitions, 400 changer transitions 13/1513 dead transitions. [2023-01-28 04:13:11,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1513 transitions, 39593 flow [2023-01-28 04:13:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 04:13:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 04:13:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1142 transitions. [2023-01-28 04:13:11,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531746031746032 [2023-01-28 04:13:11,829 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1142 transitions. [2023-01-28 04:13:11,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1142 transitions. [2023-01-28 04:13:11,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:13:11,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1142 transitions. [2023-01-28 04:13:11,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.1) internal successors, (1142), 20 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:11,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:11,833 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:11,833 INFO L175 Difference]: Start difference. First operand has 367 places, 1234 transitions, 30706 flow. Second operand 20 states and 1142 transitions. [2023-01-28 04:13:11,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1513 transitions, 39593 flow [2023-01-28 04:13:16,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1513 transitions, 38437 flow, removed 95 selfloop flow, removed 28 redundant places. [2023-01-28 04:13:16,142 INFO L231 Difference]: Finished difference. Result has 367 places, 1362 transitions, 34706 flow [2023-01-28 04:13:16,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=29714, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=34706, PETRI_PLACES=367, PETRI_TRANSITIONS=1362} [2023-01-28 04:13:16,143 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 347 predicate places. [2023-01-28 04:13:16,143 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1362 transitions, 34706 flow [2023-01-28 04:13:16,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 52.8421052631579) internal successors, (1004), 19 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:16,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:13:16,144 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:13:16,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-01-28 04:13:16,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 04:13:16,348 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:13:16,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:13:16,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1739013303, now seen corresponding path program 22 times [2023-01-28 04:13:16,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:13:16,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761000415] [2023-01-28 04:13:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:13:16,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:13:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:13:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:16,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:13:16,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761000415] [2023-01-28 04:13:16,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761000415] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:13:16,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356371293] [2023-01-28 04:13:16,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:13:16,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:13:16,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:13:16,417 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:13:16,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 04:13:16,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:13:16,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:13:16,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:13:16,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:13:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:16,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:13:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:16,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356371293] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:13:16,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:13:16,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2023-01-28 04:13:16,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046267678] [2023-01-28 04:13:16,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:13:16,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 04:13:16,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:13:16,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 04:13:16,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-01-28 04:13:16,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:13:16,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1362 transitions, 34706 flow. Second operand has 18 states, 18 states have (on average 52.888888888888886) internal successors, (952), 18 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:16,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:13:16,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:13:16,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:13:20,329 INFO L130 PetriNetUnfolder]: 4560/8863 cut-off events. [2023-01-28 04:13:20,330 INFO L131 PetriNetUnfolder]: For 343867/343867 co-relation queries the response was YES. [2023-01-28 04:13:20,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92152 conditions, 8863 events. 4560/8863 cut-off events. For 343867/343867 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 74796 event pairs, 231 based on Foata normal form. 56/8919 useless extension candidates. Maximal degree in co-relation 90940. Up to 5093 conditions per place. [2023-01-28 04:13:20,430 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 902 selfloop transitions, 762 changer transitions 18/1682 dead transitions. [2023-01-28 04:13:20,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1682 transitions, 44593 flow [2023-01-28 04:13:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 04:13:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 04:13:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1426 transitions. [2023-01-28 04:13:20,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4526984126984127 [2023-01-28 04:13:20,432 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1426 transitions. [2023-01-28 04:13:20,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1426 transitions. [2023-01-28 04:13:20,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:13:20,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1426 transitions. [2023-01-28 04:13:20,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.04) internal successors, (1426), 25 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:20,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 126.0) internal successors, (3276), 26 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:20,436 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 126.0) internal successors, (3276), 26 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:20,436 INFO L175 Difference]: Start difference. First operand has 367 places, 1362 transitions, 34706 flow. Second operand 25 states and 1426 transitions. [2023-01-28 04:13:20,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1682 transitions, 44593 flow [2023-01-28 04:13:25,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1682 transitions, 44322 flow, removed 105 selfloop flow, removed 7 redundant places. [2023-01-28 04:13:25,810 INFO L231 Difference]: Finished difference. Result has 391 places, 1520 transitions, 41276 flow [2023-01-28 04:13:25,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=34471, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=616, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=41276, PETRI_PLACES=391, PETRI_TRANSITIONS=1520} [2023-01-28 04:13:25,811 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 371 predicate places. [2023-01-28 04:13:25,811 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 1520 transitions, 41276 flow [2023-01-28 04:13:25,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.888888888888886) internal successors, (952), 18 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:25,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:13:25,811 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:13:25,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 04:13:26,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 04:13:26,016 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:13:26,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:13:26,016 INFO L85 PathProgramCache]: Analyzing trace with hash -378475203, now seen corresponding path program 23 times [2023-01-28 04:13:26,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:13:26,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967305835] [2023-01-28 04:13:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:13:26,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:13:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:13:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:26,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:13:26,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967305835] [2023-01-28 04:13:26,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967305835] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:13:26,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107293459] [2023-01-28 04:13:26,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:13:26,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:13:26,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:13:26,091 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:13:26,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 04:13:26,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 04:13:26,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:13:26,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:13:26,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:13:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:26,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:13:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:26,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107293459] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:13:26,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:13:26,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2023-01-28 04:13:26,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260684308] [2023-01-28 04:13:26,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:13:26,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 04:13:26,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:13:26,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 04:13:26,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-01-28 04:13:26,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:13:26,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1520 transitions, 41276 flow. Second operand has 18 states, 18 states have (on average 52.888888888888886) internal successors, (952), 18 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:26,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:13:26,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:13:26,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:13:30,416 INFO L130 PetriNetUnfolder]: 4794/9325 cut-off events. [2023-01-28 04:13:30,417 INFO L131 PetriNetUnfolder]: For 437003/437003 co-relation queries the response was YES. [2023-01-28 04:13:30,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101177 conditions, 9325 events. 4794/9325 cut-off events. For 437003/437003 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 79305 event pairs, 123 based on Foata normal form. 160/9485 useless extension candidates. Maximal degree in co-relation 99780. Up to 2638 conditions per place. [2023-01-28 04:13:30,530 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 555 selfloop transitions, 1191 changer transitions 17/1763 dead transitions. [2023-01-28 04:13:30,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1763 transitions, 49308 flow [2023-01-28 04:13:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 04:13:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 04:13:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1530 transitions. [2023-01-28 04:13:30,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2023-01-28 04:13:30,532 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1530 transitions. [2023-01-28 04:13:30,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1530 transitions. [2023-01-28 04:13:30,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:13:30,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1530 transitions. [2023-01-28 04:13:30,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 56.666666666666664) internal successors, (1530), 27 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:30,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 126.0) internal successors, (3528), 28 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:30,536 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 126.0) internal successors, (3528), 28 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:30,537 INFO L175 Difference]: Start difference. First operand has 391 places, 1520 transitions, 41276 flow. Second operand 27 states and 1530 transitions. [2023-01-28 04:13:30,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1763 transitions, 49308 flow [2023-01-28 04:13:37,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1763 transitions, 47812 flow, removed 349 selfloop flow, removed 9 redundant places. [2023-01-28 04:13:37,156 INFO L231 Difference]: Finished difference. Result has 412 places, 1620 transitions, 46601 flow [2023-01-28 04:13:37,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=39850, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=46601, PETRI_PLACES=412, PETRI_TRANSITIONS=1620} [2023-01-28 04:13:37,157 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 392 predicate places. [2023-01-28 04:13:37,157 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1620 transitions, 46601 flow [2023-01-28 04:13:37,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.888888888888886) internal successors, (952), 18 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:37,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:13:37,158 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:13:37,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-01-28 04:13:37,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:13:37,358 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:13:37,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:13:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1543577845, now seen corresponding path program 24 times [2023-01-28 04:13:37,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:13:37,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29433091] [2023-01-28 04:13:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:13:37,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:13:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:13:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:37,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:13:37,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29433091] [2023-01-28 04:13:37,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29433091] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:13:37,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122365600] [2023-01-28 04:13:37,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:13:37,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:13:37,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:13:37,445 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:13:37,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 04:13:37,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:13:37,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:13:37,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:13:37,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:13:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:37,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:13:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:37,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122365600] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:13:37,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:13:37,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-01-28 04:13:37,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185676329] [2023-01-28 04:13:37,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:13:37,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 04:13:37,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:13:37,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 04:13:37,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-01-28 04:13:37,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:13:37,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1620 transitions, 46601 flow. Second operand has 23 states, 23 states have (on average 52.69565217391305) internal successors, (1212), 23 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:37,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:13:37,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:13:37,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:13:45,092 INFO L130 PetriNetUnfolder]: 7192/13685 cut-off events. [2023-01-28 04:13:45,092 INFO L131 PetriNetUnfolder]: For 603463/603463 co-relation queries the response was YES. [2023-01-28 04:13:45,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159847 conditions, 13685 events. 7192/13685 cut-off events. For 603463/603463 co-relation queries the response was YES. Maximal size of possible extension queue 1087. Compared 120476 event pairs, 311 based on Foata normal form. 96/13781 useless extension candidates. Maximal degree in co-relation 158012. Up to 7156 conditions per place. [2023-01-28 04:13:45,261 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 1398 selfloop transitions, 1222 changer transitions 28/2648 dead transitions. [2023-01-28 04:13:45,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 2648 transitions, 81246 flow [2023-01-28 04:13:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 04:13:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 04:13:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1716 transitions. [2023-01-28 04:13:45,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45396825396825397 [2023-01-28 04:13:45,263 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1716 transitions. [2023-01-28 04:13:45,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1716 transitions. [2023-01-28 04:13:45,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:13:45,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1716 transitions. [2023-01-28 04:13:45,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.2) internal successors, (1716), 30 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:45,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 126.0) internal successors, (3906), 31 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:45,267 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 126.0) internal successors, (3906), 31 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:45,267 INFO L175 Difference]: Start difference. First operand has 412 places, 1620 transitions, 46601 flow. Second operand 30 states and 1716 transitions. [2023-01-28 04:13:45,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 2648 transitions, 81246 flow [2023-01-28 04:13:57,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 2648 transitions, 80012 flow, removed 359 selfloop flow, removed 16 redundant places. [2023-01-28 04:13:57,136 INFO L231 Difference]: Finished difference. Result has 440 places, 2398 transitions, 75751 flow [2023-01-28 04:13:57,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=45775, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=981, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=75751, PETRI_PLACES=440, PETRI_TRANSITIONS=2398} [2023-01-28 04:13:57,138 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 420 predicate places. [2023-01-28 04:13:57,138 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 2398 transitions, 75751 flow [2023-01-28 04:13:57,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 52.69565217391305) internal successors, (1212), 23 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:57,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:13:57,138 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:13:57,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 04:13:57,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:13:57,343 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:13:57,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:13:57,343 INFO L85 PathProgramCache]: Analyzing trace with hash 827009771, now seen corresponding path program 25 times [2023-01-28 04:13:57,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:13:57,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632863057] [2023-01-28 04:13:57,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:13:57,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:13:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:13:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:57,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:13:57,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632863057] [2023-01-28 04:13:57,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632863057] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:13:57,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370145150] [2023-01-28 04:13:57,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:13:57,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:13:57,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:13:57,431 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:13:57,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 04:13:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:13:57,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:13:57,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:13:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:57,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:13:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:13:57,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370145150] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:13:57,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:13:57,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2023-01-28 04:13:57,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204859300] [2023-01-28 04:13:57,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:13:57,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 04:13:57,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:13:57,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 04:13:57,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-01-28 04:13:57,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:13:57,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 2398 transitions, 75751 flow. Second operand has 19 states, 19 states have (on average 52.8421052631579) internal successors, (1004), 19 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:13:57,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:13:57,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:13:57,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:14:09,406 INFO L130 PetriNetUnfolder]: 8823/16847 cut-off events. [2023-01-28 04:14:09,406 INFO L131 PetriNetUnfolder]: For 927633/927633 co-relation queries the response was YES. [2023-01-28 04:14:09,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205083 conditions, 16847 events. 8823/16847 cut-off events. For 927633/927633 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 153765 event pairs, 215 based on Foata normal form. 210/17057 useless extension candidates. Maximal degree in co-relation 203250. Up to 5130 conditions per place. [2023-01-28 04:14:09,625 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 850 selfloop transitions, 2287 changer transitions 34/3171 dead transitions. [2023-01-28 04:14:09,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 3171 transitions, 102319 flow [2023-01-28 04:14:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 04:14:09,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 04:14:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1766 transitions. [2023-01-28 04:14:09,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45212493599590375 [2023-01-28 04:14:09,627 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1766 transitions. [2023-01-28 04:14:09,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1766 transitions. [2023-01-28 04:14:09,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:14:09,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1766 transitions. [2023-01-28 04:14:09,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 56.96774193548387) internal successors, (1766), 31 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:14:09,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 126.0) internal successors, (4032), 32 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:14:09,631 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 126.0) internal successors, (4032), 32 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:14:09,631 INFO L175 Difference]: Start difference. First operand has 440 places, 2398 transitions, 75751 flow. Second operand 31 states and 1766 transitions. [2023-01-28 04:14:09,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 3171 transitions, 102319 flow [2023-01-28 04:14:28,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 3171 transitions, 100733 flow, removed 767 selfloop flow, removed 5 redundant places. [2023-01-28 04:14:28,451 INFO L231 Difference]: Finished difference. Result has 476 places, 2952 transitions, 99816 flow [2023-01-28 04:14:28,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=74399, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=99816, PETRI_PLACES=476, PETRI_TRANSITIONS=2952} [2023-01-28 04:14:28,453 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 456 predicate places. [2023-01-28 04:14:28,453 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 2952 transitions, 99816 flow [2023-01-28 04:14:28,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 52.8421052631579) internal successors, (1004), 19 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:14:28,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:14:28,453 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:14:28,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 04:14:28,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:14:28,654 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:14:28,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:14:28,654 INFO L85 PathProgramCache]: Analyzing trace with hash 552340077, now seen corresponding path program 26 times [2023-01-28 04:14:28,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:14:28,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753260608] [2023-01-28 04:14:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:14:28,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:14:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:14:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:14:28,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:14:28,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753260608] [2023-01-28 04:14:28,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753260608] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:14:28,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024198688] [2023-01-28 04:14:28,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:14:28,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:14:28,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:14:28,742 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:14:28,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 04:14:28,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:14:28,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:14:28,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:14:28,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:14:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:14:28,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:14:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:14:28,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024198688] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:14:28,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:14:28,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-01-28 04:14:28,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137137841] [2023-01-28 04:14:28,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:14:28,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 04:14:28,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:14:28,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 04:14:28,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-01-28 04:14:28,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:14:28,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 2952 transitions, 99816 flow. Second operand has 25 states, 25 states have (on average 52.44) internal successors, (1311), 25 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:14:28,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:14:28,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:14:28,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:14:43,345 INFO L130 PetriNetUnfolder]: 8983/17153 cut-off events. [2023-01-28 04:14:43,345 INFO L131 PetriNetUnfolder]: For 1004046/1004046 co-relation queries the response was YES. [2023-01-28 04:14:43,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219236 conditions, 17153 events. 8983/17153 cut-off events. For 1004046/1004046 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 156556 event pairs, 3096 based on Foata normal form. 136/17289 useless extension candidates. Maximal degree in co-relation 217186. Up to 15357 conditions per place. [2023-01-28 04:14:43,582 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 2833 selfloop transitions, 320 changer transitions 43/3196 dead transitions. [2023-01-28 04:14:43,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 3196 transitions, 109711 flow [2023-01-28 04:14:43,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 04:14:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 04:14:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1784 transitions. [2023-01-28 04:14:43,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567332309267793 [2023-01-28 04:14:43,584 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1784 transitions. [2023-01-28 04:14:43,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1784 transitions. [2023-01-28 04:14:43,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:14:43,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1784 transitions. [2023-01-28 04:14:43,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.54838709677419) internal successors, (1784), 31 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:14:43,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 126.0) internal successors, (4032), 32 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:14:43,588 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 126.0) internal successors, (4032), 32 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:14:43,588 INFO L175 Difference]: Start difference. First operand has 476 places, 2952 transitions, 99816 flow. Second operand 31 states and 1784 transitions. [2023-01-28 04:14:43,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 3196 transitions, 109711 flow [2023-01-28 04:15:10,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 3196 transitions, 108232 flow, removed 632 selfloop flow, removed 12 redundant places. [2023-01-28 04:15:10,155 INFO L231 Difference]: Finished difference. Result has 506 places, 3033 transitions, 101263 flow [2023-01-28 04:15:10,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=98337, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=101263, PETRI_PLACES=506, PETRI_TRANSITIONS=3033} [2023-01-28 04:15:10,157 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 486 predicate places. [2023-01-28 04:15:10,157 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 3033 transitions, 101263 flow [2023-01-28 04:15:10,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.44) internal successors, (1311), 25 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:15:10,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:15:10,157 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:15:10,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-01-28 04:15:10,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:15:10,358 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:15:10,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:15:10,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1370707805, now seen corresponding path program 27 times [2023-01-28 04:15:10,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:15:10,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621043291] [2023-01-28 04:15:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:15:10,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:15:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:15:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:15:10,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:15:10,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621043291] [2023-01-28 04:15:10,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621043291] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:15:10,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659159174] [2023-01-28 04:15:10,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:15:10,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:15:10,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:15:10,428 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:15:10,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 04:15:10,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-01-28 04:15:10,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:15:10,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:15:10,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:15:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:15:10,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:15:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:15:10,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659159174] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:15:10,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:15:10,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2023-01-28 04:15:10,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628897138] [2023-01-28 04:15:10,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:15:10,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 04:15:10,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:15:10,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 04:15:10,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-01-28 04:15:10,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:15:10,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 3033 transitions, 101263 flow. Second operand has 21 states, 21 states have (on average 52.666666666666664) internal successors, (1106), 21 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:15:10,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:15:10,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:15:10,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:15:25,627 INFO L130 PetriNetUnfolder]: 9044/17266 cut-off events. [2023-01-28 04:15:25,627 INFO L131 PetriNetUnfolder]: For 982340/982340 co-relation queries the response was YES. [2023-01-28 04:15:25,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221286 conditions, 17266 events. 9044/17266 cut-off events. For 982340/982340 co-relation queries the response was YES. Maximal size of possible extension queue 1422. Compared 157883 event pairs, 1047 based on Foata normal form. 6/17272 useless extension candidates. Maximal degree in co-relation 219328. Up to 6051 conditions per place. [2023-01-28 04:15:25,874 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 1887 selfloop transitions, 1293 changer transitions 19/3199 dead transitions. [2023-01-28 04:15:25,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 3199 transitions, 110179 flow [2023-01-28 04:15:25,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 04:15:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 04:15:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2051 transitions. [2023-01-28 04:15:25,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43993993993993996 [2023-01-28 04:15:25,876 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2051 transitions. [2023-01-28 04:15:25,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2051 transitions. [2023-01-28 04:15:25,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:15:25,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2051 transitions. [2023-01-28 04:15:25,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.432432432432435) internal successors, (2051), 37 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:15:25,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 126.0) internal successors, (4788), 38 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:15:25,880 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 126.0) internal successors, (4788), 38 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:15:25,880 INFO L175 Difference]: Start difference. First operand has 506 places, 3033 transitions, 101263 flow. Second operand 37 states and 2051 transitions. [2023-01-28 04:15:25,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 3199 transitions, 110179 flow [2023-01-28 04:15:52,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 3199 transitions, 107760 flow, removed 683 selfloop flow, removed 8 redundant places. [2023-01-28 04:15:52,549 INFO L231 Difference]: Finished difference. Result has 538 places, 3104 transitions, 103243 flow [2023-01-28 04:15:52,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=99106, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=103243, PETRI_PLACES=538, PETRI_TRANSITIONS=3104} [2023-01-28 04:15:52,551 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 518 predicate places. [2023-01-28 04:15:52,552 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 3104 transitions, 103243 flow [2023-01-28 04:15:52,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.666666666666664) internal successors, (1106), 21 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:15:52,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:15:52,552 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:15:52,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-01-28 04:15:52,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-01-28 04:15:52,752 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:15:52,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:15:52,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1617405810, now seen corresponding path program 28 times [2023-01-28 04:15:52,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:15:52,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926721188] [2023-01-28 04:15:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:15:52,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:15:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:15:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:15:52,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:15:52,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926721188] [2023-01-28 04:15:52,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926721188] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:15:52,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599685920] [2023-01-28 04:15:52,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:15:52,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:15:52,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:15:52,831 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:15:52,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 04:15:52,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:15:52,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:15:52,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-28 04:15:52,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:15:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:15:52,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:15:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:15:53,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599685920] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:15:53,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:15:53,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2023-01-28 04:15:53,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889215591] [2023-01-28 04:15:53,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:15:53,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 04:15:53,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:15:53,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 04:15:53,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-01-28 04:15:53,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 126 [2023-01-28 04:15:53,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 3104 transitions, 103243 flow. Second operand has 12 states, 12 states have (on average 63.666666666666664) internal successors, (764), 12 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:15:53,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:15:53,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 126 [2023-01-28 04:15:53,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:16:15,364 INFO L130 PetriNetUnfolder]: 12403/23554 cut-off events. [2023-01-28 04:16:15,364 INFO L131 PetriNetUnfolder]: For 1435159/1435169 co-relation queries the response was YES. [2023-01-28 04:16:15,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304414 conditions, 23554 events. 12403/23554 cut-off events. For 1435159/1435169 co-relation queries the response was YES. Maximal size of possible extension queue 1902. Compared 224381 event pairs, 868 based on Foata normal form. 40/23592 useless extension candidates. Maximal degree in co-relation 301635. Up to 13343 conditions per place. [2023-01-28 04:16:15,768 INFO L137 encePairwiseOnDemand]: 122/126 looper letters, 2525 selfloop transitions, 1684 changer transitions 255/4473 dead transitions. [2023-01-28 04:16:15,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 4473 transitions, 152255 flow [2023-01-28 04:16:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:16:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:16:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 495 transitions. [2023-01-28 04:16:15,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2023-01-28 04:16:15,770 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 495 transitions. [2023-01-28 04:16:15,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 495 transitions. [2023-01-28 04:16:15,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:16:15,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 495 transitions. [2023-01-28 04:16:15,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.71428571428571) internal successors, (495), 7 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:16:15,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:16:15,771 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:16:15,771 INFO L175 Difference]: Start difference. First operand has 538 places, 3104 transitions, 103243 flow. Second operand 7 states and 495 transitions. [2023-01-28 04:16:15,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 4473 transitions, 152255 flow [2023-01-28 04:16:57,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 4473 transitions, 150505 flow, removed 500 selfloop flow, removed 13 redundant places. [2023-01-28 04:16:57,802 INFO L231 Difference]: Finished difference. Result has 535 places, 4047 transitions, 139725 flow [2023-01-28 04:16:57,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=102268, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=722, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139725, PETRI_PLACES=535, PETRI_TRANSITIONS=4047} [2023-01-28 04:16:57,805 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 515 predicate places. [2023-01-28 04:16:57,805 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 4047 transitions, 139725 flow [2023-01-28 04:16:57,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.666666666666664) internal successors, (764), 12 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:16:57,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:16:57,805 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:16:57,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-28 04:16:58,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:16:58,011 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:16:58,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:16:58,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1426821311, now seen corresponding path program 29 times [2023-01-28 04:16:58,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:16:58,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445479902] [2023-01-28 04:16:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:16:58,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:16:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:16:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:16:58,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:16:58,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445479902] [2023-01-28 04:16:58,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445479902] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:16:58,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790605250] [2023-01-28 04:16:58,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:16:58,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:16:58,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:16:58,112 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:16:58,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 04:16:58,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 04:16:58,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:16:58,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 04:16:58,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:16:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:16:58,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:16:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:16:58,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790605250] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:16:58,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:16:58,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-01-28 04:16:58,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133037349] [2023-01-28 04:16:58,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:16:58,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:16:58,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:16:58,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:16:58,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-01-28 04:16:58,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:16:58,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 4047 transitions, 139725 flow. Second operand has 20 states, 20 states have (on average 52.75) internal successors, (1055), 20 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:16:58,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:16:58,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:16:58,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:17:30,076 INFO L130 PetriNetUnfolder]: 14625/27800 cut-off events. [2023-01-28 04:17:30,076 INFO L131 PetriNetUnfolder]: For 1781125/1781125 co-relation queries the response was YES. [2023-01-28 04:17:30,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376816 conditions, 27800 events. 14625/27800 cut-off events. For 1781125/1781125 co-relation queries the response was YES. Maximal size of possible extension queue 2164. Compared 270041 event pairs, 1153 based on Foata normal form. 80/27880 useless extension candidates. Maximal degree in co-relation 373213. Up to 22727 conditions per place. [2023-01-28 04:17:30,565 INFO L137 encePairwiseOnDemand]: 121/126 looper letters, 4191 selfloop transitions, 877 changer transitions 69/5137 dead transitions. [2023-01-28 04:17:30,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 5137 transitions, 187665 flow [2023-01-28 04:17:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 04:17:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 04:17:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 752 transitions. [2023-01-28 04:17:30,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590964590964591 [2023-01-28 04:17:30,566 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 752 transitions. [2023-01-28 04:17:30,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 752 transitions. [2023-01-28 04:17:30,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:17:30,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 752 transitions. [2023-01-28 04:17:30,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 57.84615384615385) internal successors, (752), 13 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:17:30,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 126.0) internal successors, (1764), 14 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:17:30,568 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 126.0) internal successors, (1764), 14 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:17:30,568 INFO L175 Difference]: Start difference. First operand has 535 places, 4047 transitions, 139725 flow. Second operand 13 states and 752 transitions. [2023-01-28 04:17:30,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 5137 transitions, 187665 flow [2023-01-28 04:18:30,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 5137 transitions, 185601 flow, removed 965 selfloop flow, removed 2 redundant places. [2023-01-28 04:18:30,585 INFO L231 Difference]: Finished difference. Result has 552 places, 4769 transitions, 171341 flow [2023-01-28 04:18:30,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=137738, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=171341, PETRI_PLACES=552, PETRI_TRANSITIONS=4769} [2023-01-28 04:18:30,588 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 532 predicate places. [2023-01-28 04:18:30,588 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 4769 transitions, 171341 flow [2023-01-28 04:18:30,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.75) internal successors, (1055), 20 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:18:30,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:18:30,588 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:18:30,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-28 04:18:30,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:18:30,789 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:18:30,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:18:30,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2068517451, now seen corresponding path program 30 times [2023-01-28 04:18:30,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:18:30,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286042522] [2023-01-28 04:18:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:18:30,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:18:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:18:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:18:30,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:18:30,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286042522] [2023-01-28 04:18:30,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286042522] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:18:30,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931655389] [2023-01-28 04:18:30,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:18:30,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:18:30,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:18:30,898 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:18:30,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 04:18:30,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 04:18:30,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:18:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 04:18:30,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:18:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:18:31,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:18:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:18:31,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931655389] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:18:31,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:18:31,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2023-01-28 04:18:31,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209308163] [2023-01-28 04:18:31,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:18:31,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 04:18:31,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:18:31,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 04:18:31,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-01-28 04:18:31,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:18:31,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 4769 transitions, 171341 flow. Second operand has 22 states, 22 states have (on average 52.54545454545455) internal successors, (1156), 22 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:18:31,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:18:31,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:18:31,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:19:16,848 INFO L130 PetriNetUnfolder]: 16093/30512 cut-off events. [2023-01-28 04:19:16,848 INFO L131 PetriNetUnfolder]: For 2000119/2000119 co-relation queries the response was YES. [2023-01-28 04:19:17,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419588 conditions, 30512 events. 16093/30512 cut-off events. For 2000119/2000119 co-relation queries the response was YES. Maximal size of possible extension queue 2260. Compared 298375 event pairs, 1155 based on Foata normal form. 80/30592 useless extension candidates. Maximal degree in co-relation 416209. Up to 23369 conditions per place. [2023-01-28 04:19:17,606 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 4211 selfloop transitions, 1280 changer transitions 20/5511 dead transitions. [2023-01-28 04:19:17,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 5511 transitions, 205790 flow [2023-01-28 04:19:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 04:19:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 04:19:17,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1145 transitions. [2023-01-28 04:19:17,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45436507936507936 [2023-01-28 04:19:17,607 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1145 transitions. [2023-01-28 04:19:17,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1145 transitions. [2023-01-28 04:19:17,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:19:17,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1145 transitions. [2023-01-28 04:19:17,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.25) internal successors, (1145), 20 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:19:17,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:19:17,610 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 126.0) internal successors, (2646), 21 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:19:17,610 INFO L175 Difference]: Start difference. First operand has 552 places, 4769 transitions, 171341 flow. Second operand 20 states and 1145 transitions. [2023-01-28 04:19:17,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 5511 transitions, 205790 flow [2023-01-28 04:20:29,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 5511 transitions, 205416 flow, removed 168 selfloop flow, removed 4 redundant places. [2023-01-28 04:20:30,055 INFO L231 Difference]: Finished difference. Result has 573 places, 5167 transitions, 191064 flow [2023-01-28 04:20:30,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=171057, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=938, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=191064, PETRI_PLACES=573, PETRI_TRANSITIONS=5167} [2023-01-28 04:20:30,059 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 553 predicate places. [2023-01-28 04:20:30,059 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 5167 transitions, 191064 flow [2023-01-28 04:20:30,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 52.54545454545455) internal successors, (1156), 22 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:20:30,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:20:30,059 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:20:30,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-28 04:20:30,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-28 04:20:30,263 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:20:30,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:20:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash 78564277, now seen corresponding path program 31 times [2023-01-28 04:20:30,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:20:30,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279731913] [2023-01-28 04:20:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:20:30,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:20:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:20:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:20:30,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:20:30,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279731913] [2023-01-28 04:20:30,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279731913] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:20:30,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444116656] [2023-01-28 04:20:30,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:20:30,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:20:30,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:20:30,355 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:20:30,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 04:20:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:20:30,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 04:20:30,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:20:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:20:30,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:20:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:20:30,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444116656] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:20:30,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:20:30,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2023-01-28 04:20:30,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122656942] [2023-01-28 04:20:30,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:20:30,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 04:20:30,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:20:30,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 04:20:30,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2023-01-28 04:20:30,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:20:30,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 5167 transitions, 191064 flow. Second operand has 21 states, 21 states have (on average 52.57142857142857) internal successors, (1104), 21 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:20:30,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:20:30,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:20:30,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:21:19,438 INFO L130 PetriNetUnfolder]: 16914/32172 cut-off events. [2023-01-28 04:21:19,438 INFO L131 PetriNetUnfolder]: For 2431623/2431623 co-relation queries the response was YES. [2023-01-28 04:21:19,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450992 conditions, 32172 events. 16914/32172 cut-off events. For 2431623/2431623 co-relation queries the response was YES. Maximal size of possible extension queue 2400. Compared 318567 event pairs, 243 based on Foata normal form. 166/32338 useless extension candidates. Maximal degree in co-relation 447421. Up to 9888 conditions per place. [2023-01-28 04:21:20,022 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 1103 selfloop transitions, 4682 changer transitions 65/5850 dead transitions. [2023-01-28 04:21:20,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 5850 transitions, 219720 flow [2023-01-28 04:21:20,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-28 04:21:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-28 04:21:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2913 transitions. [2023-01-28 04:21:20,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45331465919701214 [2023-01-28 04:21:20,025 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2913 transitions. [2023-01-28 04:21:20,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2913 transitions. [2023-01-28 04:21:20,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:21:20,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2913 transitions. [2023-01-28 04:21:20,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 57.11764705882353) internal successors, (2913), 51 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:21:20,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 126.0) internal successors, (6552), 52 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:21:20,031 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 126.0) internal successors, (6552), 52 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:21:20,031 INFO L175 Difference]: Start difference. First operand has 573 places, 5167 transitions, 191064 flow. Second operand 51 states and 2913 transitions. [2023-01-28 04:21:20,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 5850 transitions, 219720 flow [2023-01-28 04:22:48,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 5850 transitions, 218315 flow, removed 646 selfloop flow, removed 6 redundant places. [2023-01-28 04:22:49,077 INFO L231 Difference]: Finished difference. Result has 631 places, 5476 transitions, 216145 flow [2023-01-28 04:22:49,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=189765, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=216145, PETRI_PLACES=631, PETRI_TRANSITIONS=5476} [2023-01-28 04:22:49,081 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 611 predicate places. [2023-01-28 04:22:49,081 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 5476 transitions, 216145 flow [2023-01-28 04:22:49,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.57142857142857) internal successors, (1104), 21 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:22:49,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:22:49,081 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:22:49,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-28 04:22:49,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 04:22:49,282 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:22:49,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:22:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash 938033453, now seen corresponding path program 32 times [2023-01-28 04:22:49,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:22:49,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688853321] [2023-01-28 04:22:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:22:49,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:22:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:22:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:22:49,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:22:49,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688853321] [2023-01-28 04:22:49,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688853321] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:22:49,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523013993] [2023-01-28 04:22:49,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:22:49,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:22:49,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:22:49,361 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:22:49,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 04:22:49,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:22:49,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:22:49,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 04:22:49,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:22:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:22:49,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:22:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:22:49,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523013993] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:22:49,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:22:49,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2023-01-28 04:22:49,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251095851] [2023-01-28 04:22:49,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:22:49,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 04:22:49,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:22:49,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 04:22:49,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-01-28 04:22:49,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:22:49,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 5476 transitions, 216145 flow. Second operand has 21 states, 21 states have (on average 52.57142857142857) internal successors, (1104), 21 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:22:49,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:22:49,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:22:49,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:23:51,349 INFO L130 PetriNetUnfolder]: 16865/32031 cut-off events. [2023-01-28 04:23:51,349 INFO L131 PetriNetUnfolder]: For 2626644/2626644 co-relation queries the response was YES. [2023-01-28 04:23:51,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476366 conditions, 32031 events. 16865/32031 cut-off events. For 2626644/2626644 co-relation queries the response was YES. Maximal size of possible extension queue 2405. Compared 316434 event pairs, 139 based on Foata normal form. 20/32051 useless extension candidates. Maximal degree in co-relation 472781. Up to 9892 conditions per place. [2023-01-28 04:23:51,993 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 679 selfloop transitions, 5083 changer transitions 64/5826 dead transitions. [2023-01-28 04:23:51,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 5826 transitions, 234614 flow [2023-01-28 04:23:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-01-28 04:23:51,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-01-28 04:23:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3556 transitions. [2023-01-28 04:23:51,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2023-01-28 04:23:51,996 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3556 transitions. [2023-01-28 04:23:51,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3556 transitions. [2023-01-28 04:23:51,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:23:51,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3556 transitions. [2023-01-28 04:23:51,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.5625) internal successors, (3556), 64 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:23:52,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 126.0) internal successors, (8190), 65 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:23:52,003 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 126.0) internal successors, (8190), 65 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:23:52,003 INFO L175 Difference]: Start difference. First operand has 631 places, 5476 transitions, 216145 flow. Second operand 64 states and 3556 transitions. [2023-01-28 04:23:52,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 5826 transitions, 234614 flow [2023-01-28 04:25:25,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 5826 transitions, 226284 flow, removed 2642 selfloop flow, removed 27 redundant places. [2023-01-28 04:25:26,001 INFO L231 Difference]: Finished difference. Result has 668 places, 5594 transitions, 221386 flow [2023-01-28 04:25:26,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=207855, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4970, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=221386, PETRI_PLACES=668, PETRI_TRANSITIONS=5594} [2023-01-28 04:25:26,004 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 648 predicate places. [2023-01-28 04:25:26,005 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 5594 transitions, 221386 flow [2023-01-28 04:25:26,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.57142857142857) internal successors, (1104), 21 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:25:26,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:25:26,005 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:25:26,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-28 04:25:26,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 04:25:26,210 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:25:26,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:25:26,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1006144169, now seen corresponding path program 33 times [2023-01-28 04:25:26,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:25:26,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301330449] [2023-01-28 04:25:26,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:25:26,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:25:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:25:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:25:26,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:25:26,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301330449] [2023-01-28 04:25:26,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301330449] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:25:26,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531825007] [2023-01-28 04:25:26,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:25:26,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:25:26,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:25:26,300 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:25:26,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 04:25:26,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 04:25:26,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:25:26,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 04:25:26,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:25:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:25:26,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:25:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:25:26,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531825007] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:25:26,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:25:26,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 22 [2023-01-28 04:25:26,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996865245] [2023-01-28 04:25:26,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:25:26,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 04:25:26,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:25:26,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 04:25:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-01-28 04:25:26,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 126 [2023-01-28 04:25:26,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 5594 transitions, 221386 flow. Second operand has 22 states, 22 states have (on average 52.72727272727273) internal successors, (1160), 22 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:25:26,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:25:26,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 126 [2023-01-28 04:25:26,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:25,965 INFO L130 PetriNetUnfolder]: 17943/33834 cut-off events. [2023-01-28 04:26:25,965 INFO L131 PetriNetUnfolder]: For 2725835/2725835 co-relation queries the response was YES. [2023-01-28 04:26:26,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510383 conditions, 33834 events. 17943/33834 cut-off events. For 2725835/2725835 co-relation queries the response was YES. Maximal size of possible extension queue 2480. Compared 334191 event pairs, 1043 based on Foata normal form. 80/33914 useless extension candidates. Maximal degree in co-relation 506658. Up to 23486 conditions per place. [2023-01-28 04:26:26,768 INFO L137 encePairwiseOnDemand]: 120/126 looper letters, 4414 selfloop transitions, 1817 changer transitions 23/6254 dead transitions. [2023-01-28 04:26:26,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 6254 transitions, 255402 flow [2023-01-28 04:26:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 04:26:26,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 04:26:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1484 transitions. [2023-01-28 04:26:26,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452991452991453 [2023-01-28 04:26:26,770 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1484 transitions. [2023-01-28 04:26:26,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1484 transitions. [2023-01-28 04:26:26,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:26,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1484 transitions. [2023-01-28 04:26:26,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 57.07692307692308) internal successors, (1484), 26 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:26,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 126.0) internal successors, (3402), 27 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:26,773 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 126.0) internal successors, (3402), 27 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:26,773 INFO L175 Difference]: Start difference. First operand has 668 places, 5594 transitions, 221386 flow. Second operand 26 states and 1484 transitions. [2023-01-28 04:26:26,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 6254 transitions, 255402 flow Received shutdown request... [2023-01-28 04:26:32,801 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 04:26:32,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-28 04:26:32,823 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 04:26:32,823 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 04:26:33,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 04:26:33,002 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-28 04:26:33,004 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 04:26:33,004 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 04:26:33,004 INFO L445 BasicCegarLoop]: Path program histogram: [33, 6, 1] [2023-01-28 04:26:33,006 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 04:26:33,006 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 04:26:33,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 04:26:33 BasicIcfg [2023-01-28 04:26:33,009 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 04:26:33,009 INFO L158 Benchmark]: Toolchain (without parser) took 848471.59ms. Allocated memory was 356.5MB in the beginning and 4.9GB in the end (delta: 4.5GB). Free memory was 304.9MB in the beginning and 3.3GB in the end (delta: -3.0GB). Peak memory consumption was 3.3GB. Max. memory is 16.0GB. [2023-01-28 04:26:33,009 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory was 213.6MB in the beginning and 213.4MB in the end (delta: 167.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 04:26:33,009 INFO L158 Benchmark]: CACSL2BoogieTranslator took 154.76ms. Allocated memory is still 356.5MB. Free memory was 304.9MB in the beginning and 294.1MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 04:26:33,010 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.71ms. Allocated memory is still 356.5MB. Free memory was 294.1MB in the beginning and 292.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 04:26:33,010 INFO L158 Benchmark]: Boogie Preprocessor took 22.55ms. Allocated memory is still 356.5MB. Free memory was 292.6MB in the beginning and 291.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 04:26:33,010 INFO L158 Benchmark]: RCFGBuilder took 307.24ms. Allocated memory is still 356.5MB. Free memory was 291.1MB in the beginning and 324.8MB in the end (delta: -33.7MB). Peak memory consumption was 12.7MB. Max. memory is 16.0GB. [2023-01-28 04:26:33,010 INFO L158 Benchmark]: TraceAbstraction took 847938.68ms. Allocated memory was 356.5MB in the beginning and 4.9GB in the end (delta: 4.5GB). Free memory was 324.2MB in the beginning and 3.3GB in the end (delta: -3.0GB). Peak memory consumption was 3.3GB. Max. memory is 16.0GB. [2023-01-28 04:26:33,011 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory was 213.6MB in the beginning and 213.4MB in the end (delta: 167.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 154.76ms. Allocated memory is still 356.5MB. Free memory was 304.9MB in the beginning and 294.1MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 23.71ms. Allocated memory is still 356.5MB. Free memory was 294.1MB in the beginning and 292.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 22.55ms. Allocated memory is still 356.5MB. Free memory was 292.6MB in the beginning and 291.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 307.24ms. Allocated memory is still 356.5MB. Free memory was 291.1MB in the beginning and 324.8MB in the end (delta: -33.7MB). Peak memory consumption was 12.7MB. Max. memory is 16.0GB. * TraceAbstraction took 847938.68ms. Allocated memory was 356.5MB in the beginning and 4.9GB in the end (delta: 4.5GB). Free memory was 324.2MB in the beginning and 3.3GB in the end (delta: -3.0GB). Peak memory consumption was 3.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.3s, 65 PlacesBefore, 20 PlacesAfterwards, 63 TransitionsBefore, 15 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 5 FixpointIterations, 25 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 53 TotalNumberOfCompositions, 535 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 507, independent: 503, independent conditional: 0, independent unconditional: 503, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 269, independent: 267, independent conditional: 0, independent unconditional: 267, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 507, independent: 236, independent conditional: 0, independent unconditional: 236, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 269, unknown conditional: 0, unknown unconditional: 269] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 89 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 847.9s, OverallIterations: 40, TraceHistogramMax: 5, PathProgramHistogramMax: 33, EmptinessCheckTime: 0.0s, AutomataDifference: 830.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3528 SdHoareTripleChecker+Valid, 5.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3528 mSDsluCounter, 499 SdHoareTripleChecker+Invalid, 4.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 326 mSDsCounter, 343 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14376 IncrementalHoareTripleChecker+Invalid, 14719 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 343 mSolverCounterUnsat, 173 mSDtfsCounter, 14376 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2581 GetRequests, 1335 SyntacticMatches, 218 SemanticMatches, 1028 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11959 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=221386occurred in iteration=39, InterpolantAutomatonStates: 767, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 1395 NumberOfCodeBlocks, 1383 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 1953 ConstructedInterpolants, 0 QuantifiedInterpolants, 6079 SizeOfPredicates, 91 NumberOfNonLiveVariables, 4999 ConjunctsInSsa, 343 ConjunctsInUnsatCore, 112 InterpolantComputations, 4 PerfectInterpolantSequences, 483/1332 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown