/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 AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 11:22:14,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 11:22:14,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 11:22:14,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 11:22:14,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 11:22:14,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 11:22:14,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 11:22:14,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 11:22:14,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 11:22:14,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 11:22:14,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 11:22:14,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 11:22:14,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 11:22:14,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 11:22:14,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 11:22:14,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 11:22:14,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 11:22:14,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 11:22:14,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 11:22:14,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 11:22:14,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 11:22:14,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 11:22:14,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 11:22:14,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 11:22:14,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 11:22:14,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 11:22:14,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 11:22:14,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 11:22:14,238 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 11:22:14,250 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 11:22:14,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 11:22:14,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 11:22:14,250 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 11:22:14,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 11:22:14,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 11:22:14,251 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 11:22:14,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 11:22:14,251 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 11:22:14,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 11:22:14,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 11:22:14,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 11:22:14,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 11:22:14,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 11:22:14,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 11:22:14,252 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 11:22:14,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 11:22:14,252 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 11:22:14,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 11:22:14,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 11:22:14,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 11:22:14,253 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 11:22:14,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 11:22:14,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:22:14,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 11:22:14,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 11:22:14,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 11:22:14,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 11:22:14,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 11:22:14,254 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 11:22:14,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 11:22:14,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 11:22:14,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 11:22:14,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 11:22:14,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 11:22:14,391 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 11:22:14,392 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 11:22:14,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-01-28 11:22:15,234 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 11:22:15,444 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 11:22:15,444 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-01-28 11:22:15,449 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f08269fa4/4b41c75d92ab4798972cbd00a6b5735b/FLAG0fc9a380c [2023-01-28 11:22:15,460 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f08269fa4/4b41c75d92ab4798972cbd00a6b5735b [2023-01-28 11:22:15,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 11:22:15,463 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 11:22:15,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 11:22:15,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 11:22:15,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 11:22:15,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:22:15" (1/1) ... [2023-01-28 11:22:15,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43a32cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15, skipping insertion in model container [2023-01-28 11:22:15,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:22:15" (1/1) ... [2023-01-28 11:22:15,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 11:22:15,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 11:22:15,633 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-mult-4.wvr.c[2612,2625] [2023-01-28 11:22:15,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:22:15,646 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 11:22:15,676 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-mult-4.wvr.c[2612,2625] [2023-01-28 11:22:15,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:22:15,683 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:22:15,684 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:22:15,688 INFO L208 MainTranslator]: Completed translation [2023-01-28 11:22:15,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15 WrapperNode [2023-01-28 11:22:15,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 11:22:15,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 11:22:15,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 11:22:15,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 11:22:15,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15" (1/1) ... [2023-01-28 11:22:15,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15" (1/1) ... [2023-01-28 11:22:15,728 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2023-01-28 11:22:15,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 11:22:15,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 11:22:15,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 11:22:15,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 11:22:15,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15" (1/1) ... [2023-01-28 11:22:15,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15" (1/1) ... [2023-01-28 11:22:15,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15" (1/1) ... [2023-01-28 11:22:15,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15" (1/1) ... [2023-01-28 11:22:15,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15" (1/1) ... [2023-01-28 11:22:15,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15" (1/1) ... [2023-01-28 11:22:15,756 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15" (1/1) ... [2023-01-28 11:22:15,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15" (1/1) ... [2023-01-28 11:22:15,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 11:22:15,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 11:22:15,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 11:22:15,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 11:22:15,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15" (1/1) ... [2023-01-28 11:22:15,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:22:15,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:22:15,784 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 11:22:15,790 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 11:22:15,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 11:22:15,821 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 11:22:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 11:22:15,821 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 11:22:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 11:22:15,821 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 11:22:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 11:22:15,821 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-01-28 11:22:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-01-28 11:22:15,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 11:22:15,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 11:22:15,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 11:22:15,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 11:22:15,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 11:22:15,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 11:22:15,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 11:22:15,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 11:22:15,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 11:22:15,823 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 11:22:15,886 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 11:22:15,887 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 11:22:16,144 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 11:22:16,189 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 11:22:16,189 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-28 11:22:16,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:22:16 BoogieIcfgContainer [2023-01-28 11:22:16,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 11:22:16,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 11:22:16,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 11:22:16,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 11:22:16,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 11:22:15" (1/3) ... [2023-01-28 11:22:16,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29cd81ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:22:16, skipping insertion in model container [2023-01-28 11:22:16,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:22:15" (2/3) ... [2023-01-28 11:22:16,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29cd81ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:22:16, skipping insertion in model container [2023-01-28 11:22:16,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:22:16" (3/3) ... [2023-01-28 11:22:16,196 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2023-01-28 11:22:16,206 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 11:22:16,207 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 11:22:16,207 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 11:22:16,298 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 11:22:16,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 128 transitions, 288 flow [2023-01-28 11:22:16,406 INFO L130 PetriNetUnfolder]: 10/124 cut-off events. [2023-01-28 11:22:16,407 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 11:22:16,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 124 events. 10/124 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-01-28 11:22:16,411 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 128 transitions, 288 flow [2023-01-28 11:22:16,414 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 112 transitions, 248 flow [2023-01-28 11:22:16,416 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 11:22:16,430 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 112 transitions, 248 flow [2023-01-28 11:22:16,436 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 112 transitions, 248 flow [2023-01-28 11:22:16,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 112 transitions, 248 flow [2023-01-28 11:22:16,476 INFO L130 PetriNetUnfolder]: 10/112 cut-off events. [2023-01-28 11:22:16,476 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 11:22:16,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 112 events. 10/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 94 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-01-28 11:22:16,480 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-01-28 11:22:19,060 INFO L134 LiptonReduction]: Checked pairs total: 2598 [2023-01-28 11:22:19,060 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-01-28 11:22:19,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 11:22:19,076 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;@45d08616, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 11:22:19,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-28 11:22:19,088 INFO L130 PetriNetUnfolder]: 4/28 cut-off events. [2023-01-28 11:22:19,088 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 11:22:19,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:19,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:19,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:19,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:19,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1971920350, now seen corresponding path program 1 times [2023-01-28 11:22:19,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:19,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376795418] [2023-01-28 11:22:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:19,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:19,472 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 11:22:19,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:19,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376795418] [2023-01-28 11:22:19,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376795418] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:22:19,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:22:19,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 11:22:19,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259536491] [2023-01-28 11:22:19,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:22:19,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 11:22:19,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:19,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 11:22:19,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 11:22:19,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 222 [2023-01-28 11:22:19,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 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 11:22:19,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:19,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 222 [2023-01-28 11:22:19,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:19,698 INFO L130 PetriNetUnfolder]: 1343/1736 cut-off events. [2023-01-28 11:22:19,698 INFO L131 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2023-01-28 11:22:19,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3612 conditions, 1736 events. 1343/1736 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5850 event pairs, 215 based on Foata normal form. 1/1054 useless extension candidates. Maximal degree in co-relation 2691. Up to 1515 conditions per place. [2023-01-28 11:22:19,712 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 39 selfloop transitions, 3 changer transitions 3/49 dead transitions. [2023-01-28 11:22:19,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 233 flow [2023-01-28 11:22:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 11:22:19,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 11:22:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-01-28 11:22:19,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5540540540540541 [2023-01-28 11:22:19,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-01-28 11:22:19,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-01-28 11:22:19,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:19,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-01-28 11:22:19,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 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 11:22:19,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 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 11:22:19,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 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 11:22:19,741 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 369 transitions. [2023-01-28 11:22:19,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 233 flow [2023-01-28 11:22:19,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 203 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-28 11:22:19,747 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2023-01-28 11:22:19,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-01-28 11:22:19,752 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-01-28 11:22:19,752 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2023-01-28 11:22:19,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 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 11:22:19,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:19,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:19,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 11:22:19,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:19,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:19,755 INFO L85 PathProgramCache]: Analyzing trace with hash 550150448, now seen corresponding path program 1 times [2023-01-28 11:22:19,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:19,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28987874] [2023-01-28 11:22:19,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:19,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:19,937 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 11:22:19,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:19,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28987874] [2023-01-28 11:22:19,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28987874] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:22:19,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:22:19,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 11:22:19,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448906613] [2023-01-28 11:22:19,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:22:19,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 11:22:19,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:19,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 11:22:19,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 11:22:19,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 222 [2023-01-28 11:22:19,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 11:22:19,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:19,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 222 [2023-01-28 11:22:19,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:20,235 INFO L130 PetriNetUnfolder]: 1929/2707 cut-off events. [2023-01-28 11:22:20,236 INFO L131 PetriNetUnfolder]: For 828/828 co-relation queries the response was YES. [2023-01-28 11:22:20,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6276 conditions, 2707 events. 1929/2707 cut-off events. For 828/828 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12322 event pairs, 489 based on Foata normal form. 304/2995 useless extension candidates. Maximal degree in co-relation 2470. Up to 1349 conditions per place. [2023-01-28 11:22:20,249 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 74 selfloop transitions, 4 changer transitions 2/82 dead transitions. [2023-01-28 11:22:20,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 82 transitions, 384 flow [2023-01-28 11:22:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:22:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:22:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 557 transitions. [2023-01-28 11:22:20,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018018018018018 [2023-01-28 11:22:20,252 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 557 transitions. [2023-01-28 11:22:20,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 557 transitions. [2023-01-28 11:22:20,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:20,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 557 transitions. [2023-01-28 11:22:20,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 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 11:22:20,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 11:22:20,256 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 11:22:20,256 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 5 states and 557 transitions. [2023-01-28 11:22:20,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 82 transitions, 384 flow [2023-01-28 11:22:20,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 82 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 11:22:20,258 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 134 flow [2023-01-28 11:22:20,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=134, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-01-28 11:22:20,261 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-01-28 11:22:20,261 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 134 flow [2023-01-28 11:22:20,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 11:22:20,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:20,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:20,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 11:22:20,262 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:20,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:20,264 INFO L85 PathProgramCache]: Analyzing trace with hash -634446788, now seen corresponding path program 2 times [2023-01-28 11:22:20,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:20,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960597367] [2023-01-28 11:22:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:20,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:20,401 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 11:22:20,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:20,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960597367] [2023-01-28 11:22:20,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960597367] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:22:20,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:22:20,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 11:22:20,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723770077] [2023-01-28 11:22:20,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:22:20,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:22:20,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:20,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:22:20,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:22:20,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 222 [2023-01-28 11:22:20,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:20,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:20,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 222 [2023-01-28 11:22:20,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:20,641 INFO L130 PetriNetUnfolder]: 1807/2582 cut-off events. [2023-01-28 11:22:20,641 INFO L131 PetriNetUnfolder]: For 2758/3083 co-relation queries the response was YES. [2023-01-28 11:22:20,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7767 conditions, 2582 events. 1807/2582 cut-off events. For 2758/3083 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12128 event pairs, 489 based on Foata normal form. 400/2953 useless extension candidates. Maximal degree in co-relation 1682. Up to 1640 conditions per place. [2023-01-28 11:22:20,656 INFO L137 encePairwiseOnDemand]: 218/222 looper letters, 54 selfloop transitions, 4 changer transitions 7/69 dead transitions. [2023-01-28 11:22:20,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 69 transitions, 381 flow [2023-01-28 11:22:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:22:20,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:22:20,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 454 transitions. [2023-01-28 11:22:20,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5112612612612613 [2023-01-28 11:22:20,658 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 454 transitions. [2023-01-28 11:22:20,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 454 transitions. [2023-01-28 11:22:20,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:20,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 454 transitions. [2023-01-28 11:22:20,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:20,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:20,660 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:20,661 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 134 flow. Second operand 4 states and 454 transitions. [2023-01-28 11:22:20,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 69 transitions, 381 flow [2023-01-28 11:22:20,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 69 transitions, 374 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 11:22:20,667 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 160 flow [2023-01-28 11:22:20,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-01-28 11:22:20,668 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-01-28 11:22:20,670 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 160 flow [2023-01-28 11:22:20,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:20,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:20,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:20,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 11:22:20,671 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:20,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:20,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1967310179, now seen corresponding path program 1 times [2023-01-28 11:22:20,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:20,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793348007] [2023-01-28 11:22:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:20,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:20,803 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 11:22:20,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:20,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793348007] [2023-01-28 11:22:20,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793348007] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:22:20,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:22:20,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 11:22:20,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931048124] [2023-01-28 11:22:20,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:22:20,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 11:22:20,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:20,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 11:22:20,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 11:22:20,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 222 [2023-01-28 11:22:20,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 11:22:20,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:20,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 222 [2023-01-28 11:22:20,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:21,089 INFO L130 PetriNetUnfolder]: 2391/3500 cut-off events. [2023-01-28 11:22:21,090 INFO L131 PetriNetUnfolder]: For 6576/6968 co-relation queries the response was YES. [2023-01-28 11:22:21,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10873 conditions, 3500 events. 2391/3500 cut-off events. For 6576/6968 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18396 event pairs, 729 based on Foata normal form. 569/4038 useless extension candidates. Maximal degree in co-relation 4402. Up to 1997 conditions per place. [2023-01-28 11:22:21,109 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 63 selfloop transitions, 5 changer transitions 18/88 dead transitions. [2023-01-28 11:22:21,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 88 transitions, 514 flow [2023-01-28 11:22:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:22:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:22:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-01-28 11:22:21,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4990990990990991 [2023-01-28 11:22:21,115 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-01-28 11:22:21,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-01-28 11:22:21,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:21,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-01-28 11:22:21,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 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 11:22:21,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 11:22:21,118 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 11:22:21,118 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 160 flow. Second operand 5 states and 554 transitions. [2023-01-28 11:22:21,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 88 transitions, 514 flow [2023-01-28 11:22:21,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 88 transitions, 509 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 11:22:21,125 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 200 flow [2023-01-28 11:22:21,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-01-28 11:22:21,127 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2023-01-28 11:22:21,127 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 200 flow [2023-01-28 11:22:21,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 11:22:21,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:21,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:21,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 11:22:21,127 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:21,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:21,128 INFO L85 PathProgramCache]: Analyzing trace with hash -630595977, now seen corresponding path program 2 times [2023-01-28 11:22:21,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:21,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509432091] [2023-01-28 11:22:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:21,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:21,220 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 11:22:21,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:21,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509432091] [2023-01-28 11:22:21,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509432091] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:22:21,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:22:21,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 11:22:21,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145657989] [2023-01-28 11:22:21,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:22:21,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:22:21,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:22:21,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:22:21,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 222 [2023-01-28 11:22:21,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:21,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:21,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 222 [2023-01-28 11:22:21,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:21,548 INFO L130 PetriNetUnfolder]: 2636/3791 cut-off events. [2023-01-28 11:22:21,549 INFO L131 PetriNetUnfolder]: For 12510/13050 co-relation queries the response was YES. [2023-01-28 11:22:21,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14035 conditions, 3791 events. 2636/3791 cut-off events. For 12510/13050 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19034 event pairs, 704 based on Foata normal form. 474/4113 useless extension candidates. Maximal degree in co-relation 8693. Up to 1833 conditions per place. [2023-01-28 11:22:21,577 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 63 selfloop transitions, 10 changer transitions 1/79 dead transitions. [2023-01-28 11:22:21,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 79 transitions, 570 flow [2023-01-28 11:22:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:22:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:22:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 454 transitions. [2023-01-28 11:22:21,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5112612612612613 [2023-01-28 11:22:21,579 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 454 transitions. [2023-01-28 11:22:21,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 454 transitions. [2023-01-28 11:22:21,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:21,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 454 transitions. [2023-01-28 11:22:21,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:21,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:21,583 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:21,583 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 200 flow. Second operand 4 states and 454 transitions. [2023-01-28 11:22:21,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 79 transitions, 570 flow [2023-01-28 11:22:21,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 549 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-01-28 11:22:21,595 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 321 flow [2023-01-28 11:22:21,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-01-28 11:22:21,596 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-01-28 11:22:21,597 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 321 flow [2023-01-28 11:22:21,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:21,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:21,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:21,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 11:22:21,597 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:21,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:21,598 INFO L85 PathProgramCache]: Analyzing trace with hash 373265492, now seen corresponding path program 3 times [2023-01-28 11:22:21,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:21,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222491340] [2023-01-28 11:22:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:21,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:21,675 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 11:22:21,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:21,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222491340] [2023-01-28 11:22:21,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222491340] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:22:21,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:22:21,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 11:22:21,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800496656] [2023-01-28 11:22:21,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:22:21,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:22:21,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:21,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:22:21,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:22:21,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 222 [2023-01-28 11:22:21,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:21,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:21,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 222 [2023-01-28 11:22:21,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:22,045 INFO L130 PetriNetUnfolder]: 3959/5512 cut-off events. [2023-01-28 11:22:22,045 INFO L131 PetriNetUnfolder]: For 27139/27835 co-relation queries the response was YES. [2023-01-28 11:22:22,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23963 conditions, 5512 events. 3959/5512 cut-off events. For 27139/27835 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 27821 event pairs, 1419 based on Foata normal form. 655/6035 useless extension candidates. Maximal degree in co-relation 11708. Up to 3327 conditions per place. [2023-01-28 11:22:22,073 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 69 selfloop transitions, 19 changer transitions 5/97 dead transitions. [2023-01-28 11:22:22,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 97 transitions, 845 flow [2023-01-28 11:22:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:22:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:22:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 455 transitions. [2023-01-28 11:22:22,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123873873873874 [2023-01-28 11:22:22,075 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 455 transitions. [2023-01-28 11:22:22,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 455 transitions. [2023-01-28 11:22:22,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:22,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 455 transitions. [2023-01-28 11:22:22,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 0 states have call successors, (0), 0 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 11:22:22,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:22,077 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:22,077 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 321 flow. Second operand 4 states and 455 transitions. [2023-01-28 11:22:22,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 97 transitions, 845 flow [2023-01-28 11:22:22,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 97 transitions, 810 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-01-28 11:22:22,099 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 542 flow [2023-01-28 11:22:22,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=542, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-01-28 11:22:22,100 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2023-01-28 11:22:22,100 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 542 flow [2023-01-28 11:22:22,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:22,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:22,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:22,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 11:22:22,101 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:22,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:22,101 INFO L85 PathProgramCache]: Analyzing trace with hash 913151625, now seen corresponding path program 3 times [2023-01-28 11:22:22,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:22,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924579931] [2023-01-28 11:22:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:22,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:22,155 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 11:22:22,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:22,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924579931] [2023-01-28 11:22:22,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924579931] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:22:22,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:22:22,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 11:22:22,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170153506] [2023-01-28 11:22:22,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:22:22,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:22:22,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:22,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:22:22,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:22:22,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 222 [2023-01-28 11:22:22,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 542 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:22,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:22,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 222 [2023-01-28 11:22:22,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:22,548 INFO L130 PetriNetUnfolder]: 4069/5629 cut-off events. [2023-01-28 11:22:22,549 INFO L131 PetriNetUnfolder]: For 34585/35242 co-relation queries the response was YES. [2023-01-28 11:22:22,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26334 conditions, 5629 events. 4069/5629 cut-off events. For 34585/35242 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28061 event pairs, 1051 based on Foata normal form. 543/6085 useless extension candidates. Maximal degree in co-relation 17951. Up to 4642 conditions per place. [2023-01-28 11:22:22,578 INFO L137 encePairwiseOnDemand]: 218/222 looper letters, 70 selfloop transitions, 9 changer transitions 12/95 dead transitions. [2023-01-28 11:22:22,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 95 transitions, 932 flow [2023-01-28 11:22:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:22:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:22:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 450 transitions. [2023-01-28 11:22:22,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067567567567568 [2023-01-28 11:22:22,580 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 450 transitions. [2023-01-28 11:22:22,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 450 transitions. [2023-01-28 11:22:22,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:22,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 450 transitions. [2023-01-28 11:22:22,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:22,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:22,582 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:22,582 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 542 flow. Second operand 4 states and 450 transitions. [2023-01-28 11:22:22,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 95 transitions, 932 flow [2023-01-28 11:22:22,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 95 transitions, 922 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 11:22:22,600 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 588 flow [2023-01-28 11:22:22,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=588, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-01-28 11:22:22,601 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-01-28 11:22:22,601 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 588 flow [2023-01-28 11:22:22,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:22,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:22,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:22,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 11:22:22,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:22,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash -254193814, now seen corresponding path program 4 times [2023-01-28 11:22:22,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:22,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29071473] [2023-01-28 11:22:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:22,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:22,710 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 11:22:22,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:22,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29071473] [2023-01-28 11:22:22,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29071473] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:22:22,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:22:22,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 11:22:22,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97493492] [2023-01-28 11:22:22,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:22:22,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 11:22:22,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:22,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 11:22:22,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 11:22:22,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 222 [2023-01-28 11:22:22,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 588 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 11:22:22,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:22,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 222 [2023-01-28 11:22:22,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:23,182 INFO L130 PetriNetUnfolder]: 4191/5821 cut-off events. [2023-01-28 11:22:23,183 INFO L131 PetriNetUnfolder]: For 34875/35391 co-relation queries the response was YES. [2023-01-28 11:22:23,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27011 conditions, 5821 events. 4191/5821 cut-off events. For 34875/35391 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 29329 event pairs, 1433 based on Foata normal form. 467/6264 useless extension candidates. Maximal degree in co-relation 21531. Up to 4101 conditions per place. [2023-01-28 11:22:23,207 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 87 selfloop transitions, 16 changer transitions 21/126 dead transitions. [2023-01-28 11:22:23,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 126 transitions, 1224 flow [2023-01-28 11:22:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:22:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:22:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 655 transitions. [2023-01-28 11:22:23,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49174174174174173 [2023-01-28 11:22:23,209 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 655 transitions. [2023-01-28 11:22:23,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 655 transitions. [2023-01-28 11:22:23,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:23,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 655 transitions. [2023-01-28 11:22:23,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.16666666666667) internal successors, (655), 6 states have internal predecessors, (655), 0 states have call successors, (0), 0 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 11:22:23,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 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 11:22:23,212 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 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 11:22:23,212 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 588 flow. Second operand 6 states and 655 transitions. [2023-01-28 11:22:23,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 126 transitions, 1224 flow [2023-01-28 11:22:23,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 126 transitions, 1176 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-01-28 11:22:23,229 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 691 flow [2023-01-28 11:22:23,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=691, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2023-01-28 11:22:23,230 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-01-28 11:22:23,230 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 691 flow [2023-01-28 11:22:23,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 11:22:23,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:23,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:23,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 11:22:23,230 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:23,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:23,231 INFO L85 PathProgramCache]: Analyzing trace with hash 48622009, now seen corresponding path program 4 times [2023-01-28 11:22:23,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:23,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522662157] [2023-01-28 11:22:23,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:23,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:23,279 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 11:22:23,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:23,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522662157] [2023-01-28 11:22:23,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522662157] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:22:23,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:22:23,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 11:22:23,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60811382] [2023-01-28 11:22:23,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:22:23,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:22:23,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:23,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:22:23,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:22:23,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 222 [2023-01-28 11:22:23,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 691 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:23,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:23,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 222 [2023-01-28 11:22:23,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:23,745 INFO L130 PetriNetUnfolder]: 5266/7366 cut-off events. [2023-01-28 11:22:23,746 INFO L131 PetriNetUnfolder]: For 67702/70243 co-relation queries the response was YES. [2023-01-28 11:22:23,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35154 conditions, 7366 events. 5266/7366 cut-off events. For 67702/70243 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 38692 event pairs, 1726 based on Foata normal form. 1773/8952 useless extension candidates. Maximal degree in co-relation 26456. Up to 4880 conditions per place. [2023-01-28 11:22:23,781 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 117 selfloop transitions, 6 changer transitions 0/129 dead transitions. [2023-01-28 11:22:23,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 129 transitions, 1596 flow [2023-01-28 11:22:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:22:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:22:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 448 transitions. [2023-01-28 11:22:23,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045045045045045 [2023-01-28 11:22:23,842 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 448 transitions. [2023-01-28 11:22:23,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 448 transitions. [2023-01-28 11:22:23,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:23,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 448 transitions. [2023-01-28 11:22:23,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 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 11:22:23,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:23,844 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:23,844 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 691 flow. Second operand 4 states and 448 transitions. [2023-01-28 11:22:23,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 129 transitions, 1596 flow [2023-01-28 11:22:23,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 129 transitions, 1533 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-01-28 11:22:23,875 INFO L231 Difference]: Finished difference. Result has 65 places, 71 transitions, 809 flow [2023-01-28 11:22:23,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=809, PETRI_PLACES=65, PETRI_TRANSITIONS=71} [2023-01-28 11:22:23,875 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2023-01-28 11:22:23,876 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 71 transitions, 809 flow [2023-01-28 11:22:23,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:23,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:23,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:23,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 11:22:23,877 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:23,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:23,877 INFO L85 PathProgramCache]: Analyzing trace with hash -234274435, now seen corresponding path program 5 times [2023-01-28 11:22:23,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:23,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102252234] [2023-01-28 11:22:23,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:23,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:23,968 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 11:22:23,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:23,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102252234] [2023-01-28 11:22:23,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102252234] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:22:23,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:22:23,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 11:22:23,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771544070] [2023-01-28 11:22:23,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:22:23,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:22:23,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:23,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:22:23,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:22:23,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 222 [2023-01-28 11:22:23,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 71 transitions, 809 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:23,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:23,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 222 [2023-01-28 11:22:23,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:24,423 INFO L130 PetriNetUnfolder]: 4779/6700 cut-off events. [2023-01-28 11:22:24,424 INFO L131 PetriNetUnfolder]: For 55435/57405 co-relation queries the response was YES. [2023-01-28 11:22:24,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36636 conditions, 6700 events. 4779/6700 cut-off events. For 55435/57405 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 34177 event pairs, 1447 based on Foata normal form. 1495/8061 useless extension candidates. Maximal degree in co-relation 29093. Up to 4406 conditions per place. [2023-01-28 11:22:24,462 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 82 selfloop transitions, 15 changer transitions 12/115 dead transitions. [2023-01-28 11:22:24,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 115 transitions, 1347 flow [2023-01-28 11:22:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:22:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:22:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 454 transitions. [2023-01-28 11:22:24,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5112612612612613 [2023-01-28 11:22:24,464 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 454 transitions. [2023-01-28 11:22:24,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 454 transitions. [2023-01-28 11:22:24,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:24,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 454 transitions. [2023-01-28 11:22:24,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:24,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:24,466 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:24,466 INFO L175 Difference]: Start difference. First operand has 65 places, 71 transitions, 809 flow. Second operand 4 states and 454 transitions. [2023-01-28 11:22:24,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 115 transitions, 1347 flow [2023-01-28 11:22:24,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 1328 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 11:22:24,495 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 876 flow [2023-01-28 11:22:24,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=876, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2023-01-28 11:22:24,496 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2023-01-28 11:22:24,496 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 876 flow [2023-01-28 11:22:24,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:24,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:24,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:24,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 11:22:24,498 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:24,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:24,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1251327380, now seen corresponding path program 1 times [2023-01-28 11:22:24,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:24,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965307598] [2023-01-28 11:22:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:24,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:22:24,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:24,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965307598] [2023-01-28 11:22:24,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965307598] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:22:24,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:22:24,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 11:22:24,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598632891] [2023-01-28 11:22:24,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:22:24,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 11:22:24,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:24,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 11:22:24,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 11:22:24,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 222 [2023-01-28 11:22:24,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 876 flow. Second operand has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 11:22:24,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:24,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 222 [2023-01-28 11:22:24,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:25,100 INFO L130 PetriNetUnfolder]: 4201/5794 cut-off events. [2023-01-28 11:22:25,100 INFO L131 PetriNetUnfolder]: For 59445/60555 co-relation queries the response was YES. [2023-01-28 11:22:25,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32881 conditions, 5794 events. 4201/5794 cut-off events. For 59445/60555 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27820 event pairs, 1667 based on Foata normal form. 1024/6763 useless extension candidates. Maximal degree in co-relation 26313. Up to 4049 conditions per place. [2023-01-28 11:22:25,147 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 78 selfloop transitions, 13 changer transitions 18/112 dead transitions. [2023-01-28 11:22:25,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 1365 flow [2023-01-28 11:22:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:22:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:22:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 535 transitions. [2023-01-28 11:22:25,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.481981981981982 [2023-01-28 11:22:25,149 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 535 transitions. [2023-01-28 11:22:25,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 535 transitions. [2023-01-28 11:22:25,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:25,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 535 transitions. [2023-01-28 11:22:25,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.0) internal successors, (535), 5 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 11:22:25,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 11:22:25,151 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 11:22:25,151 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 876 flow. Second operand 5 states and 535 transitions. [2023-01-28 11:22:25,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 1365 flow [2023-01-28 11:22:25,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 1304 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-01-28 11:22:25,189 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 874 flow [2023-01-28 11:22:25,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=874, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-01-28 11:22:25,190 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2023-01-28 11:22:25,190 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 874 flow [2023-01-28 11:22:25,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 11:22:25,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:25,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:25,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 11:22:25,191 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:25,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:25,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1898023995, now seen corresponding path program 1 times [2023-01-28 11:22:25,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:25,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167885374] [2023-01-28 11:22:25,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:25,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:22:25,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:25,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167885374] [2023-01-28 11:22:25,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167885374] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:22:25,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:22:25,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 11:22:25,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306205985] [2023-01-28 11:22:25,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:22:25,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 11:22:25,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:25,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 11:22:25,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 11:22:25,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 222 [2023-01-28 11:22:25,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 874 flow. Second operand has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 11:22:25,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:25,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 222 [2023-01-28 11:22:25,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:25,683 INFO L130 PetriNetUnfolder]: 4197/5653 cut-off events. [2023-01-28 11:22:25,683 INFO L131 PetriNetUnfolder]: For 59686/60734 co-relation queries the response was YES. [2023-01-28 11:22:25,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34240 conditions, 5653 events. 4197/5653 cut-off events. For 59686/60734 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 25502 event pairs, 1565 based on Foata normal form. 1008/6589 useless extension candidates. Maximal degree in co-relation 30326. Up to 4391 conditions per place. [2023-01-28 11:22:25,714 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 83 selfloop transitions, 29 changer transitions 6/121 dead transitions. [2023-01-28 11:22:25,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 121 transitions, 1562 flow [2023-01-28 11:22:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:22:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:22:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 537 transitions. [2023-01-28 11:22:25,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4837837837837838 [2023-01-28 11:22:25,716 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 537 transitions. [2023-01-28 11:22:25,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 537 transitions. [2023-01-28 11:22:25,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:25,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 537 transitions. [2023-01-28 11:22:25,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 11:22:25,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 11:22:25,718 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 11:22:25,718 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 874 flow. Second operand 5 states and 537 transitions. [2023-01-28 11:22:25,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 121 transitions, 1562 flow [2023-01-28 11:22:25,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 121 transitions, 1428 flow, removed 52 selfloop flow, removed 4 redundant places. [2023-01-28 11:22:25,754 INFO L231 Difference]: Finished difference. Result has 71 places, 86 transitions, 1079 flow [2023-01-28 11:22:25,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1079, PETRI_PLACES=71, PETRI_TRANSITIONS=86} [2023-01-28 11:22:25,755 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-01-28 11:22:25,755 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 86 transitions, 1079 flow [2023-01-28 11:22:25,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 11:22:25,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:25,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:25,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 11:22:25,756 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:25,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:25,756 INFO L85 PathProgramCache]: Analyzing trace with hash 967516647, now seen corresponding path program 1 times [2023-01-28 11:22:25,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:25,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677990816] [2023-01-28 11:22:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:25,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:22:25,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:25,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677990816] [2023-01-28 11:22:25,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677990816] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:22:25,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749707623] [2023-01-28 11:22:25,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:25,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:22:25,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:22:25,858 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 11:22:25,894 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 11:22:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:25,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 11:22:25,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:22:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:22:26,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:22:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:22:26,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749707623] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 11:22:26,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 11:22:26,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-01-28 11:22:26,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331559283] [2023-01-28 11:22:26,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:22:26,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:22:26,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:26,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:22:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-01-28 11:22:26,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 222 [2023-01-28 11:22:26,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 86 transitions, 1079 flow. Second operand has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 11:22:26,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:26,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 222 [2023-01-28 11:22:26,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:26,610 INFO L130 PetriNetUnfolder]: 5554/7244 cut-off events. [2023-01-28 11:22:26,610 INFO L131 PetriNetUnfolder]: For 84222/86425 co-relation queries the response was YES. [2023-01-28 11:22:26,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45650 conditions, 7244 events. 5554/7244 cut-off events. For 84222/86425 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31186 event pairs, 1070 based on Foata normal form. 1098/8191 useless extension candidates. Maximal degree in co-relation 36019. Up to 6002 conditions per place. [2023-01-28 11:22:26,657 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 116 selfloop transitions, 19 changer transitions 1/143 dead transitions. [2023-01-28 11:22:26,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 143 transitions, 1973 flow [2023-01-28 11:22:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:22:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:22:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 444 transitions. [2023-01-28 11:22:26,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-01-28 11:22:26,658 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 444 transitions. [2023-01-28 11:22:26,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 444 transitions. [2023-01-28 11:22:26,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:26,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 444 transitions. [2023-01-28 11:22:26,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 11:22:26,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:26,660 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:26,660 INFO L175 Difference]: Start difference. First operand has 71 places, 86 transitions, 1079 flow. Second operand 4 states and 444 transitions. [2023-01-28 11:22:26,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 143 transitions, 1973 flow [2023-01-28 11:22:26,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 143 transitions, 1871 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-01-28 11:22:26,695 INFO L231 Difference]: Finished difference. Result has 70 places, 93 transitions, 1158 flow [2023-01-28 11:22:26,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1158, PETRI_PLACES=70, PETRI_TRANSITIONS=93} [2023-01-28 11:22:26,696 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-01-28 11:22:26,696 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 93 transitions, 1158 flow [2023-01-28 11:22:26,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 11:22:26,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:26,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:26,701 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 11:22:26,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 11:22:26,901 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:26,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:26,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1526123081, now seen corresponding path program 2 times [2023-01-28 11:22:26,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:26,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280798725] [2023-01-28 11:22:26,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:26,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:22:26,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:26,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280798725] [2023-01-28 11:22:26,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280798725] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:22:26,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096067744] [2023-01-28 11:22:26,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:22:26,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:22:26,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:22:26,973 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 11:22:26,975 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 11:22:27,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:22:27,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:22:27,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 11:22:27,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:22:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:22:27,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:22:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:22:27,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096067744] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:22:27,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:22:27,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 11:22:27,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467236557] [2023-01-28 11:22:27,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:22:27,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 11:22:27,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:27,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 11:22:27,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-01-28 11:22:27,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 222 [2023-01-28 11:22:27,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 93 transitions, 1158 flow. Second operand has 8 states, 8 states have (on average 99.5) internal successors, (796), 8 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 11:22:27,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:27,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 222 [2023-01-28 11:22:27,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:27,728 INFO L130 PetriNetUnfolder]: 6710/8604 cut-off events. [2023-01-28 11:22:27,728 INFO L131 PetriNetUnfolder]: For 104664/105795 co-relation queries the response was YES. [2023-01-28 11:22:27,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57175 conditions, 8604 events. 6710/8604 cut-off events. For 104664/105795 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 35602 event pairs, 1400 based on Foata normal form. 1197/9756 useless extension candidates. Maximal degree in co-relation 41583. Up to 5421 conditions per place. [2023-01-28 11:22:27,776 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 135 selfloop transitions, 97 changer transitions 2/239 dead transitions. [2023-01-28 11:22:27,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 239 transitions, 3638 flow [2023-01-28 11:22:27,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:22:27,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:22:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 645 transitions. [2023-01-28 11:22:27,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48423423423423423 [2023-01-28 11:22:27,778 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 645 transitions. [2023-01-28 11:22:27,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 645 transitions. [2023-01-28 11:22:27,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:27,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 645 transitions. [2023-01-28 11:22:27,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.5) internal successors, (645), 6 states have internal predecessors, (645), 0 states have call successors, (0), 0 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 11:22:27,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 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 11:22:27,781 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 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 11:22:27,781 INFO L175 Difference]: Start difference. First operand has 70 places, 93 transitions, 1158 flow. Second operand 6 states and 645 transitions. [2023-01-28 11:22:27,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 239 transitions, 3638 flow [2023-01-28 11:22:27,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 239 transitions, 3376 flow, removed 114 selfloop flow, removed 1 redundant places. [2023-01-28 11:22:27,835 INFO L231 Difference]: Finished difference. Result has 77 places, 175 transitions, 2755 flow [2023-01-28 11:22:27,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2755, PETRI_PLACES=77, PETRI_TRANSITIONS=175} [2023-01-28 11:22:27,835 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2023-01-28 11:22:27,835 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 175 transitions, 2755 flow [2023-01-28 11:22:27,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.5) internal successors, (796), 8 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 11:22:27,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:27,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:27,842 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 11:22:28,040 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,SelfDestructingSolverStorable13 [2023-01-28 11:22:28,040 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:28,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:28,040 INFO L85 PathProgramCache]: Analyzing trace with hash 423727133, now seen corresponding path program 1 times [2023-01-28 11:22:28,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:28,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488441866] [2023-01-28 11:22:28,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:28,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:22:28,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:28,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488441866] [2023-01-28 11:22:28,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488441866] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:22:28,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682123319] [2023-01-28 11:22:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:28,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:22:28,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:22:28,126 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 11:22:28,128 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 11:22:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:28,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 11:22:28,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:22:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:22:28,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:22:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:22:28,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682123319] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:22:28,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:22:28,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-01-28 11:22:28,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116499484] [2023-01-28 11:22:28,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:22:28,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 11:22:28,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:28,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 11:22:28,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-01-28 11:22:28,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 222 [2023-01-28 11:22:28,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 175 transitions, 2755 flow. Second operand has 8 states, 8 states have (on average 112.0) internal successors, (896), 8 states have internal predecessors, (896), 0 states have call successors, (0), 0 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 11:22:28,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:28,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 222 [2023-01-28 11:22:28,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:29,462 INFO L130 PetriNetUnfolder]: 12306/16025 cut-off events. [2023-01-28 11:22:29,462 INFO L131 PetriNetUnfolder]: For 236807/241514 co-relation queries the response was YES. [2023-01-28 11:22:29,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110797 conditions, 16025 events. 12306/16025 cut-off events. For 236807/241514 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 76960 event pairs, 1296 based on Foata normal form. 3116/17982 useless extension candidates. Maximal degree in co-relation 98264. Up to 10285 conditions per place. [2023-01-28 11:22:29,797 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 162 selfloop transitions, 167 changer transitions 3/344 dead transitions. [2023-01-28 11:22:29,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 344 transitions, 5614 flow [2023-01-28 11:22:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:22:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:22:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2023-01-28 11:22:29,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484234234234234 [2023-01-28 11:22:29,799 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2023-01-28 11:22:29,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2023-01-28 11:22:29,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:29,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2023-01-28 11:22:29,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 11:22:29,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:29,802 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 11:22:29,802 INFO L175 Difference]: Start difference. First operand has 77 places, 175 transitions, 2755 flow. Second operand 4 states and 487 transitions. [2023-01-28 11:22:29,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 344 transitions, 5614 flow [2023-01-28 11:22:29,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 344 transitions, 5400 flow, removed 84 selfloop flow, removed 2 redundant places. [2023-01-28 11:22:29,917 INFO L231 Difference]: Finished difference. Result has 79 places, 307 transitions, 5508 flow [2023-01-28 11:22:29,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5508, PETRI_PLACES=79, PETRI_TRANSITIONS=307} [2023-01-28 11:22:29,918 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-01-28 11:22:29,918 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 307 transitions, 5508 flow [2023-01-28 11:22:29,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 112.0) internal successors, (896), 8 states have internal predecessors, (896), 0 states have call successors, (0), 0 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 11:22:29,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:29,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:29,925 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 11:22:30,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:22:30,123 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:30,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:30,124 INFO L85 PathProgramCache]: Analyzing trace with hash 147049617, now seen corresponding path program 2 times [2023-01-28 11:22:30,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:30,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594416133] [2023-01-28 11:22:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:30,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:30,282 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 11:22:30,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:30,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594416133] [2023-01-28 11:22:30,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594416133] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:22:30,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136828026] [2023-01-28 11:22:30,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:22:30,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:22:30,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:22:30,284 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 11:22:30,289 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 11:22:30,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:22:30,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:22:30,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 11:22:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:22:30,432 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 11:22:30,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:22:30,492 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 11:22:30,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136828026] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:22:30,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:22:30,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-01-28 11:22:30,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787726020] [2023-01-28 11:22:30,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:22:30,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 11:22:30,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:30,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 11:22:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-01-28 11:22:30,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 222 [2023-01-28 11:22:30,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 307 transitions, 5508 flow. Second operand has 9 states, 9 states have (on average 110.66666666666667) internal successors, (996), 9 states have internal predecessors, (996), 0 states have call successors, (0), 0 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 11:22:30,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:30,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 222 [2023-01-28 11:22:30,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:33,576 INFO L130 PetriNetUnfolder]: 23620/30836 cut-off events. [2023-01-28 11:22:33,576 INFO L131 PetriNetUnfolder]: For 595698/603632 co-relation queries the response was YES. [2023-01-28 11:22:33,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239377 conditions, 30836 events. 23620/30836 cut-off events. For 595698/603632 co-relation queries the response was YES. Maximal size of possible extension queue 1530. Compared 162725 event pairs, 2059 based on Foata normal form. 4919/33922 useless extension candidates. Maximal degree in co-relation 212854. Up to 19599 conditions per place. [2023-01-28 11:22:33,890 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 181 selfloop transitions, 379 changer transitions 3/575 dead transitions. [2023-01-28 11:22:33,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 575 transitions, 10577 flow [2023-01-28 11:22:33,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:22:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:22:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 614 transitions. [2023-01-28 11:22:33,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531531531531532 [2023-01-28 11:22:33,892 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 614 transitions. [2023-01-28 11:22:33,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 614 transitions. [2023-01-28 11:22:33,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:33,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 614 transitions. [2023-01-28 11:22:33,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 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 11:22:33,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 11:22:33,895 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 11:22:33,895 INFO L175 Difference]: Start difference. First operand has 79 places, 307 transitions, 5508 flow. Second operand 5 states and 614 transitions. [2023-01-28 11:22:33,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 575 transitions, 10577 flow [2023-01-28 11:22:34,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 575 transitions, 10383 flow, removed 97 selfloop flow, removed 0 redundant places. [2023-01-28 11:22:34,256 INFO L231 Difference]: Finished difference. Result has 85 places, 519 transitions, 10439 flow [2023-01-28 11:22:34,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=5314, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10439, PETRI_PLACES=85, PETRI_TRANSITIONS=519} [2023-01-28 11:22:34,257 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2023-01-28 11:22:34,257 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 519 transitions, 10439 flow [2023-01-28 11:22:34,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 110.66666666666667) internal successors, (996), 9 states have internal predecessors, (996), 0 states have call successors, (0), 0 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 11:22:34,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:34,258 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:34,266 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 11:22:34,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 11:22:34,462 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:34,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:34,463 INFO L85 PathProgramCache]: Analyzing trace with hash 263795595, now seen corresponding path program 3 times [2023-01-28 11:22:34,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:34,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682374855] [2023-01-28 11:22:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:34,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:22:34,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:34,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682374855] [2023-01-28 11:22:34,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682374855] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:22:34,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817974527] [2023-01-28 11:22:34,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:22:34,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:22:34,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:22:34,591 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 11:22:34,594 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 11:22:34,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:22:34,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:22:34,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:22:34,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:22:34,736 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 11:22:34,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:22:34,805 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 11:22:34,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817974527] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:22:34,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:22:34,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-01-28 11:22:34,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890016758] [2023-01-28 11:22:34,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:22:34,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 11:22:34,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:34,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 11:22:34,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-01-28 11:22:34,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 222 [2023-01-28 11:22:34,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 519 transitions, 10439 flow. Second operand has 14 states, 14 states have (on average 96.92857142857143) internal successors, (1357), 14 states have internal predecessors, (1357), 0 states have call successors, (0), 0 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 11:22:34,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:34,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 222 [2023-01-28 11:22:34,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:48,987 INFO L130 PetriNetUnfolder]: 73165/99419 cut-off events. [2023-01-28 11:22:48,988 INFO L131 PetriNetUnfolder]: For 1652660/1658110 co-relation queries the response was YES. [2023-01-28 11:22:49,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736479 conditions, 99419 events. 73165/99419 cut-off events. For 1652660/1658110 co-relation queries the response was YES. Maximal size of possible extension queue 3861. Compared 647629 event pairs, 2626 based on Foata normal form. 7292/106701 useless extension candidates. Maximal degree in co-relation 696923. Up to 41573 conditions per place. [2023-01-28 11:22:49,866 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 2496 selfloop transitions, 935 changer transitions 0/3434 dead transitions. [2023-01-28 11:22:49,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 3434 transitions, 69490 flow [2023-01-28 11:22:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-01-28 11:22:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-01-28 11:22:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4932 transitions. [2023-01-28 11:22:49,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47268545140885565 [2023-01-28 11:22:49,875 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4932 transitions. [2023-01-28 11:22:49,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4932 transitions. [2023-01-28 11:22:49,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:49,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4932 transitions. [2023-01-28 11:22:49,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 104.93617021276596) internal successors, (4932), 47 states have internal predecessors, (4932), 0 states have call successors, (0), 0 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 11:22:49,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 222.0) internal successors, (10656), 48 states have internal predecessors, (10656), 0 states have call successors, (0), 0 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 11:22:49,893 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 222.0) internal successors, (10656), 48 states have internal predecessors, (10656), 0 states have call successors, (0), 0 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 11:22:49,893 INFO L175 Difference]: Start difference. First operand has 85 places, 519 transitions, 10439 flow. Second operand 47 states and 4932 transitions. [2023-01-28 11:22:49,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 3434 transitions, 69490 flow [2023-01-28 11:22:53,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 3434 transitions, 65338 flow, removed 2076 selfloop flow, removed 0 redundant places. [2023-01-28 11:22:53,520 INFO L231 Difference]: Finished difference. Result has 169 places, 1477 transitions, 31404 flow [2023-01-28 11:22:53,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=9821, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=31404, PETRI_PLACES=169, PETRI_TRANSITIONS=1477} [2023-01-28 11:22:53,520 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 131 predicate places. [2023-01-28 11:22:53,520 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 1477 transitions, 31404 flow [2023-01-28 11:22:53,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 96.92857142857143) internal successors, (1357), 14 states have internal predecessors, (1357), 0 states have call successors, (0), 0 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 11:22:53,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:53,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:22:53,527 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 11:22:53,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 11:22:53,725 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 11:22:53,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:53,726 INFO L85 PathProgramCache]: Analyzing trace with hash -560273567, now seen corresponding path program 4 times [2023-01-28 11:22:53,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:53,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51599933] [2023-01-28 11:22:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:53,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:22:53,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:53,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51599933] [2023-01-28 11:22:53,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51599933] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:22:53,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616534358] [2023-01-28 11:22:53,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:22:53,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:22:53,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:22:53,836 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 11:22:53,840 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 11:22:53,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:22:53,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:22:53,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:22:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:22:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:22:53,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:22:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:22:54,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616534358] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:22:54,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:22:54,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-01-28 11:22:54,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390505914] [2023-01-28 11:22:54,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:22:54,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 11:22:54,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 11:22:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-01-28 11:22:54,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 222 [2023-01-28 11:22:54,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 1477 transitions, 31404 flow. Second operand has 14 states, 14 states have (on average 95.28571428571429) internal successors, (1334), 14 states have internal predecessors, (1334), 0 states have call successors, (0), 0 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 11:22:54,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:54,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 222 [2023-01-28 11:22:54,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:23:59,406 INFO L130 PetriNetUnfolder]: 182421/252798 cut-off events. [2023-01-28 11:23:59,406 INFO L131 PetriNetUnfolder]: For 7924589/7928551 co-relation queries the response was YES. [2023-01-28 11:24:01,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2305237 conditions, 252798 events. 182421/252798 cut-off events. For 7924589/7928551 co-relation queries the response was YES. Maximal size of possible extension queue 9717. Compared 1890504 event pairs, 7429 based on Foata normal form. 8952/261746 useless extension candidates. Maximal degree in co-relation 2174794. Up to 91989 conditions per place. [2023-01-28 11:24:02,886 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 4077 selfloop transitions, 2849 changer transitions 108/7052 dead transitions. [2023-01-28 11:24:02,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 7052 transitions, 157459 flow [2023-01-28 11:24:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-01-28 11:24:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-01-28 11:24:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 7804 transitions. [2023-01-28 11:24:02,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46870870870870873 [2023-01-28 11:24:02,914 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 7804 transitions. [2023-01-28 11:24:02,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 7804 transitions. [2023-01-28 11:24:02,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:24:02,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 7804 transitions. [2023-01-28 11:24:02,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 104.05333333333333) internal successors, (7804), 75 states have internal predecessors, (7804), 0 states have call successors, (0), 0 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 11:24:02,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 222.0) internal successors, (16872), 76 states have internal predecessors, (16872), 0 states have call successors, (0), 0 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 11:24:02,956 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 222.0) internal successors, (16872), 76 states have internal predecessors, (16872), 0 states have call successors, (0), 0 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 11:24:02,956 INFO L175 Difference]: Start difference. First operand has 169 places, 1477 transitions, 31404 flow. Second operand 75 states and 7804 transitions. [2023-01-28 11:24:02,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 7052 transitions, 157459 flow Received shutdown request... [2023-01-28 11:36:38,915 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 11:36:38,952 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 11:36:39,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-01-28 11:36:39,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown