/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-channel-sum.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:22:43,610 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:22:43,667 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:22:43,669 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:22:43,670 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:22:43,670 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:22:43,670 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:22:43,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:22:43,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:22:43,699 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:22:43,700 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:22:43,700 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:22:43,700 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:22:43,701 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:22:43,701 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:22:43,701 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:22:43,702 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:22:43,702 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:22:43,702 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:22:43,702 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:22:43,702 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:22:43,702 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:22:43,702 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:22:43,703 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:22:43,703 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:22:43,704 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:22:43,704 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:22:43,704 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:22:43,704 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:22:43,704 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:22:43,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:22:43,706 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:22:43,706 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:22:43,706 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:22:43,706 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:22:43,706 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:22:43,706 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:22:43,706 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:22:43,706 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:22:43,706 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:22:43,707 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:22:43,707 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:22:43,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:22:43,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:22:43,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:22:43,908 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:22:43,908 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:22:43,909 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-channel-sum.wvr_bound2.c [2023-08-03 20:22:44,823 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:22:44,966 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:22:44,966 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-channel-sum.wvr_bound2.c [2023-08-03 20:22:44,971 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cf5e1aae/1cb34d4ba4354a85a60a5087a664822c/FLAG8af4e308f [2023-08-03 20:22:44,979 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cf5e1aae/1cb34d4ba4354a85a60a5087a664822c [2023-08-03 20:22:44,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:22:44,982 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:22:44,982 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:22:44,982 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:22:44,987 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:22:44,988 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:22:44" (1/1) ... [2023-08-03 20:22:44,989 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d7466b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:44, skipping insertion in model container [2023-08-03 20:22:44,989 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:22:44" (1/1) ... [2023-08-03 20:22:45,003 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:22:45,152 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-channel-sum.wvr_bound2.c[3109,3122] [2023-08-03 20:22:45,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:22:45,170 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:22:45,202 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-channel-sum.wvr_bound2.c[3109,3122] [2023-08-03 20:22:45,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:22:45,209 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:22:45,209 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:22:45,214 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:22:45,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:45 WrapperNode [2023-08-03 20:22:45,217 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:22:45,218 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:22:45,218 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:22:45,218 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:22:45,222 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:45" (1/1) ... [2023-08-03 20:22:45,228 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:45" (1/1) ... [2023-08-03 20:22:45,259 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 187 [2023-08-03 20:22:45,260 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:22:45,261 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:22:45,261 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:22:45,261 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:22:45,266 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:45" (1/1) ... [2023-08-03 20:22:45,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:45" (1/1) ... [2023-08-03 20:22:45,269 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:45" (1/1) ... [2023-08-03 20:22:45,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:45" (1/1) ... [2023-08-03 20:22:45,274 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:45" (1/1) ... [2023-08-03 20:22:45,276 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:45" (1/1) ... [2023-08-03 20:22:45,277 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:45" (1/1) ... [2023-08-03 20:22:45,278 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:45" (1/1) ... [2023-08-03 20:22:45,280 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:22:45,280 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:22:45,280 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:22:45,280 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:22:45,281 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:45" (1/1) ... [2023-08-03 20:22:45,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:22:45,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:22:45,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 20:22:45,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 20:22:45,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:22:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:22:45,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:22:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:22:45,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:22:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:22:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:22:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:22:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:22:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:22:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 20:22:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:22:45,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:22:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:22:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:22:45,331 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 20:22:45,394 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:22:45,395 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:22:45,600 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:22:45,640 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:22:45,641 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-03 20:22:45,642 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:22:45 BoogieIcfgContainer [2023-08-03 20:22:45,642 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:22:45,644 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:22:45,644 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:22:45,650 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:22:45,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:22:44" (1/3) ... [2023-08-03 20:22:45,650 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d58a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:22:45, skipping insertion in model container [2023-08-03 20:22:45,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:22:45" (2/3) ... [2023-08-03 20:22:45,651 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d58a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:22:45, skipping insertion in model container [2023-08-03 20:22:45,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:22:45" (3/3) ... [2023-08-03 20:22:45,651 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-channel-sum.wvr_bound2.c [2023-08-03 20:22:45,656 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:22:45,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:22:45,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:22:45,662 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:22:45,703 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 20:22:45,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 165 transitions, 352 flow [2023-08-03 20:22:45,790 INFO L124 PetriNetUnfolderBase]: 39/312 cut-off events. [2023-08-03 20:22:45,790 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:22:45,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 312 events. 39/312 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1041 event pairs, 0 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 183. Up to 8 conditions per place. [2023-08-03 20:22:45,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 165 transitions, 352 flow [2023-08-03 20:22:45,802 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 165 transitions, 352 flow [2023-08-03 20:22:45,804 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:22:45,809 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 165 transitions, 352 flow [2023-08-03 20:22:45,811 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 165 transitions, 352 flow [2023-08-03 20:22:45,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 165 transitions, 352 flow [2023-08-03 20:22:45,844 INFO L124 PetriNetUnfolderBase]: 39/312 cut-off events. [2023-08-03 20:22:45,844 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:22:45,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 312 events. 39/312 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1041 event pairs, 0 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 183. Up to 8 conditions per place. [2023-08-03 20:22:45,849 INFO L119 LiptonReduction]: Number of co-enabled transitions 4950 [2023-08-03 20:22:49,128 INFO L134 LiptonReduction]: Checked pairs total: 7679 [2023-08-03 20:22:49,128 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-03 20:22:49,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:22:49,146 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1007b3f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:22:49,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:22:49,151 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:22:49,151 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-03 20:22:49,151 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:22:49,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:22:49,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 20:22:49,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:22:49,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:22:49,158 INFO L85 PathProgramCache]: Analyzing trace with hash -780019834, now seen corresponding path program 1 times [2023-08-03 20:22:49,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:22:49,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561085629] [2023-08-03 20:22:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:22:49,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:22:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:22:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:22:49,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:22:49,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561085629] [2023-08-03 20:22:49,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561085629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:22:49,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:22:49,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:22:49,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126205102] [2023-08-03 20:22:49,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:22:49,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:22:49,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:22:49,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:22:49,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:22:49,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 322 [2023-08-03 20:22:49,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 38 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:22:49,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:22:49,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 322 [2023-08-03 20:22:49,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:22:49,461 INFO L124 PetriNetUnfolderBase]: 552/847 cut-off events. [2023-08-03 20:22:49,461 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-03 20:22:49,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1700 conditions, 847 events. 552/847 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3653 event pairs, 283 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 1445. Up to 795 conditions per place. [2023-08-03 20:22:49,468 INFO L140 encePairwiseOnDemand]: 317/322 looper letters, 31 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-03 20:22:49,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 168 flow [2023-08-03 20:22:49,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:22:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:22:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-08-03 20:22:49,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668737060041408 [2023-08-03 20:22:49,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-08-03 20:22:49,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-08-03 20:22:49,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:22:49,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-08-03 20:22:49,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:22:49,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:22:49,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:22:49,498 INFO L175 Difference]: Start difference. First operand has 34 places, 38 transitions, 98 flow. Second operand 3 states and 451 transitions. [2023-08-03 20:22:49,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 168 flow [2023-08-03 20:22:49,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:22:49,503 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 102 flow [2023-08-03 20:22:49,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-08-03 20:22:49,506 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-03 20:22:49,506 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 102 flow [2023-08-03 20:22:49,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:22:49,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:22:49,507 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-03 20:22:49,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:22:49,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:22:49,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:22:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1617173283, now seen corresponding path program 1 times [2023-08-03 20:22:49,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:22:49,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918761291] [2023-08-03 20:22:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:22:49,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:22:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:22:49,552 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:22:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:22:49,581 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:22:49,581 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:22:49,582 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 20:22:49,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 20:22:49,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 20:22:49,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:22:49,584 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 20:22:49,591 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:22:49,592 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:22:49,622 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 20:22:49,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 209 transitions, 466 flow [2023-08-03 20:22:49,699 INFO L124 PetriNetUnfolderBase]: 145/926 cut-off events. [2023-08-03 20:22:49,699 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:22:49,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 926 events. 145/926 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4786 event pairs, 1 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 558. Up to 32 conditions per place. [2023-08-03 20:22:49,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 209 transitions, 466 flow [2023-08-03 20:22:49,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 209 transitions, 466 flow [2023-08-03 20:22:49,708 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:22:49,708 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 209 transitions, 466 flow [2023-08-03 20:22:49,709 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 209 transitions, 466 flow [2023-08-03 20:22:49,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 209 transitions, 466 flow [2023-08-03 20:22:49,773 INFO L124 PetriNetUnfolderBase]: 145/926 cut-off events. [2023-08-03 20:22:49,774 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:22:49,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 926 events. 145/926 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4786 event pairs, 1 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 558. Up to 32 conditions per place. [2023-08-03 20:22:49,796 INFO L119 LiptonReduction]: Number of co-enabled transitions 13556 [2023-08-03 20:22:53,035 INFO L134 LiptonReduction]: Checked pairs total: 36662 [2023-08-03 20:22:53,036 INFO L136 LiptonReduction]: Total number of compositions: 179 [2023-08-03 20:22:53,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:22:53,038 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1007b3f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:22:53,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:22:53,039 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:22:53,039 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-03 20:22:53,039 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:22:53,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:22:53,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 20:22:53,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:22:53,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:22:53,040 INFO L85 PathProgramCache]: Analyzing trace with hash -941421071, now seen corresponding path program 1 times [2023-08-03 20:22:53,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:22:53,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048311518] [2023-08-03 20:22:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:22:53,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:22:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:22:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:22:53,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:22:53,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048311518] [2023-08-03 20:22:53,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048311518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:22:53,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:22:53,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:22:53,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550217755] [2023-08-03 20:22:53,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:22:53,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:22:53,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:22:53,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:22:53,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:22:53,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 388 [2023-08-03 20:22:53,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 70 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:22:53,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:22:53,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 388 [2023-08-03 20:22:53,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:22:59,171 INFO L124 PetriNetUnfolderBase]: 93957/118959 cut-off events. [2023-08-03 20:22:59,171 INFO L125 PetriNetUnfolderBase]: For 7346/7346 co-relation queries the response was YES. [2023-08-03 20:22:59,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239468 conditions, 118959 events. 93957/118959 cut-off events. For 7346/7346 co-relation queries the response was YES. Maximal size of possible extension queue 4124. Compared 677482 event pairs, 45957 based on Foata normal form. 3104/78506 useless extension candidates. Maximal degree in co-relation 50088. Up to 116166 conditions per place. [2023-08-03 20:22:59,821 INFO L140 encePairwiseOnDemand]: 382/388 looper letters, 55 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-03 20:22:59,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 74 transitions, 310 flow [2023-08-03 20:22:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:22:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:22:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2023-08-03 20:22:59,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48625429553264604 [2023-08-03 20:22:59,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2023-08-03 20:22:59,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2023-08-03 20:22:59,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:22:59,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2023-08-03 20:22:59,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:22:59,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:22:59,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:22:59,827 INFO L175 Difference]: Start difference. First operand has 62 places, 70 transitions, 188 flow. Second operand 3 states and 566 transitions. [2023-08-03 20:22:59,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 74 transitions, 310 flow [2023-08-03 20:22:59,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:22:59,831 INFO L231 Difference]: Finished difference. Result has 64 places, 68 transitions, 194 flow [2023-08-03 20:22:59,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=64, PETRI_TRANSITIONS=68} [2023-08-03 20:22:59,831 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2023-08-03 20:22:59,832 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 68 transitions, 194 flow [2023-08-03 20:22:59,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:22:59,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:22:59,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:22:59,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 20:22:59,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:22:59,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:22:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash -182403078, now seen corresponding path program 1 times [2023-08-03 20:22:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:22:59,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426521431] [2023-08-03 20:22:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:22:59,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:22:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:22:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:22:59,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:22:59,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426521431] [2023-08-03 20:22:59,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426521431] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:22:59,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:22:59,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:22:59,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942889355] [2023-08-03 20:22:59,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:22:59,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:22:59,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:22:59,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:22:59,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:22:59,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 388 [2023-08-03 20:22:59,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 68 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:22:59,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:22:59,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 388 [2023-08-03 20:22:59,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:23:06,218 INFO L124 PetriNetUnfolderBase]: 100278/125541 cut-off events. [2023-08-03 20:23:06,218 INFO L125 PetriNetUnfolderBase]: For 6986/6986 co-relation queries the response was YES. [2023-08-03 20:23:06,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252432 conditions, 125541 events. 100278/125541 cut-off events. For 6986/6986 co-relation queries the response was YES. Maximal size of possible extension queue 4196. Compared 694234 event pairs, 49011 based on Foata normal form. 0/78517 useless extension candidates. Maximal degree in co-relation 151746. Up to 121410 conditions per place. [2023-08-03 20:23:06,824 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 67 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-03 20:23:06,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 368 flow [2023-08-03 20:23:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:23:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:23:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-08-03 20:23:06,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49226804123711343 [2023-08-03 20:23:06,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-08-03 20:23:06,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-08-03 20:23:06,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:23:06,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-08-03 20:23:06,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:06,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:06,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:06,829 INFO L175 Difference]: Start difference. First operand has 64 places, 68 transitions, 194 flow. Second operand 3 states and 573 transitions. [2023-08-03 20:23:06,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 368 flow [2023-08-03 20:23:06,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 86 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:23:06,834 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 204 flow [2023-08-03 20:23:06,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2023-08-03 20:23:06,835 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2023-08-03 20:23:06,835 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 204 flow [2023-08-03 20:23:06,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:06,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:23:06,836 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 20:23:06,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 20:23:06,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:23:06,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:23:06,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1788784028, now seen corresponding path program 1 times [2023-08-03 20:23:06,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:23:06,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501655693] [2023-08-03 20:23:06,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:06,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:23:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:23:06,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:23:06,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501655693] [2023-08-03 20:23:06,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501655693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:23:06,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937050299] [2023-08-03 20:23:06,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:06,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:06,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:23:06,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:23:06,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 20:23:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:06,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:23:06,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:23:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:23:07,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:23:07,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937050299] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:23:07,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:23:07,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:23:07,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569204981] [2023-08-03 20:23:07,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:23:07,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:23:07,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:23:07,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:23:07,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:23:07,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 388 [2023-08-03 20:23:07,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:07,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:23:07,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 388 [2023-08-03 20:23:07,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:23:12,628 INFO L124 PetriNetUnfolderBase]: 84464/109616 cut-off events. [2023-08-03 20:23:12,629 INFO L125 PetriNetUnfolderBase]: For 10378/10378 co-relation queries the response was YES. [2023-08-03 20:23:12,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224674 conditions, 109616 events. 84464/109616 cut-off events. For 10378/10378 co-relation queries the response was YES. Maximal size of possible extension queue 4213. Compared 673383 event pairs, 30462 based on Foata normal form. 36/74479 useless extension candidates. Maximal degree in co-relation 45824. Up to 106516 conditions per place. [2023-08-03 20:23:13,221 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 65 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-03 20:23:13,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 85 transitions, 375 flow [2023-08-03 20:23:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:23:13,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:23:13,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 904 transitions. [2023-08-03 20:23:13,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465979381443299 [2023-08-03 20:23:13,224 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 904 transitions. [2023-08-03 20:23:13,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 904 transitions. [2023-08-03 20:23:13,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:23:13,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 904 transitions. [2023-08-03 20:23:13,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.8) internal successors, (904), 5 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:13,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:13,230 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:13,230 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 204 flow. Second operand 5 states and 904 transitions. [2023-08-03 20:23:13,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 85 transitions, 375 flow [2023-08-03 20:23:13,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 366 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:23:13,234 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 213 flow [2023-08-03 20:23:13,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=213, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2023-08-03 20:23:13,235 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 6 predicate places. [2023-08-03 20:23:13,235 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 213 flow [2023-08-03 20:23:13,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:13,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:23:13,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:23:13,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 20:23:13,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:13,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:23:13,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:23:13,441 INFO L85 PathProgramCache]: Analyzing trace with hash 283683306, now seen corresponding path program 1 times [2023-08-03 20:23:13,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:23:13,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325344516] [2023-08-03 20:23:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:13,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:23:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:23:13,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:23:13,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325344516] [2023-08-03 20:23:13,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325344516] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:23:13,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110172731] [2023-08-03 20:23:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:13,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:13,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:23:13,476 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:23:13,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 20:23:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:13,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:23:13,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:23:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 20:23:13,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:23:13,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110172731] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:23:13,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:23:13,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:23:13,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971895904] [2023-08-03 20:23:13,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:23:13,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:23:13,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:23:13,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:23:13,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:23:13,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 388 [2023-08-03 20:23:13,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:13,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:23:13,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 388 [2023-08-03 20:23:13,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:23:18,358 INFO L124 PetriNetUnfolderBase]: 75576/95925 cut-off events. [2023-08-03 20:23:18,358 INFO L125 PetriNetUnfolderBase]: For 6380/6380 co-relation queries the response was YES. [2023-08-03 20:23:18,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196420 conditions, 95925 events. 75576/95925 cut-off events. For 6380/6380 co-relation queries the response was YES. Maximal size of possible extension queue 2959. Compared 545541 event pairs, 31730 based on Foata normal form. 0/63757 useless extension candidates. Maximal degree in co-relation 79739. Up to 64105 conditions per place. [2023-08-03 20:23:18,782 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 80 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-03 20:23:18,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 98 transitions, 445 flow [2023-08-03 20:23:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:23:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:23:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2023-08-03 20:23:18,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017182130584192 [2023-08-03 20:23:18,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2023-08-03 20:23:18,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2023-08-03 20:23:18,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:23:18,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2023-08-03 20:23:18,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:18,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:18,787 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:18,787 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 213 flow. Second operand 3 states and 584 transitions. [2023-08-03 20:23:18,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 98 transitions, 445 flow [2023-08-03 20:23:18,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 98 transitions, 438 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:23:18,790 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 218 flow [2023-08-03 20:23:18,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2023-08-03 20:23:18,790 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2023-08-03 20:23:18,791 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 218 flow [2023-08-03 20:23:18,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:18,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:23:18,791 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:23:18,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 20:23:18,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-03 20:23:18,995 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:23:18,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:23:18,995 INFO L85 PathProgramCache]: Analyzing trace with hash -439726740, now seen corresponding path program 1 times [2023-08-03 20:23:18,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:23:18,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443951000] [2023-08-03 20:23:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:18,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:23:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:23:19,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:23:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443951000] [2023-08-03 20:23:19,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443951000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:23:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520532871] [2023-08-03 20:23:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:19,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:19,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:23:19,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:23:19,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 20:23:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:19,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:23:19,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:23:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:23:19,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:23:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:23:19,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520532871] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:23:19,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:23:19,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:23:19,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159369208] [2023-08-03 20:23:19,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:23:19,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:23:19,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:23:19,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:23:19,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:23:19,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 388 [2023-08-03 20:23:19,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:19,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:23:19,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 388 [2023-08-03 20:23:19,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:23:23,465 INFO L124 PetriNetUnfolderBase]: 65614/83932 cut-off events. [2023-08-03 20:23:23,466 INFO L125 PetriNetUnfolderBase]: For 15712/15712 co-relation queries the response was YES. [2023-08-03 20:23:23,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177419 conditions, 83932 events. 65614/83932 cut-off events. For 15712/15712 co-relation queries the response was YES. Maximal size of possible extension queue 2885. Compared 480002 event pairs, 23410 based on Foata normal form. 6/57105 useless extension candidates. Maximal degree in co-relation 57985. Up to 81861 conditions per place. [2023-08-03 20:23:23,851 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 66 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2023-08-03 20:23:23,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 382 flow [2023-08-03 20:23:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:23:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:23:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 736 transitions. [2023-08-03 20:23:23,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742268041237113 [2023-08-03 20:23:23,853 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 736 transitions. [2023-08-03 20:23:23,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 736 transitions. [2023-08-03 20:23:23,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:23:23,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 736 transitions. [2023-08-03 20:23:23,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:23,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:23,857 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:23,857 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 218 flow. Second operand 4 states and 736 transitions. [2023-08-03 20:23:23,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 382 flow [2023-08-03 20:23:24,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:23:24,020 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 214 flow [2023-08-03 20:23:24,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2023-08-03 20:23:24,020 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 9 predicate places. [2023-08-03 20:23:24,020 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 214 flow [2023-08-03 20:23:24,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:24,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:23:24,021 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:23:24,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 20:23:24,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:24,225 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:23:24,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:23:24,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1400507038, now seen corresponding path program 1 times [2023-08-03 20:23:24,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:23:24,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356163127] [2023-08-03 20:23:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:24,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:23:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:23:24,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:23:24,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356163127] [2023-08-03 20:23:24,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356163127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:23:24,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422738832] [2023-08-03 20:23:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:24,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:24,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:23:24,287 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:23:24,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 20:23:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:24,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:23:24,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:23:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:23:24,370 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:23:24,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422738832] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:23:24,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:23:24,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:23:24,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727391764] [2023-08-03 20:23:24,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:23:24,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:23:24,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:23:24,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:23:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:23:24,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 388 [2023-08-03 20:23:24,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:24,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:23:24,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 388 [2023-08-03 20:23:24,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:23:28,219 INFO L124 PetriNetUnfolderBase]: 62260/79090 cut-off events. [2023-08-03 20:23:28,220 INFO L125 PetriNetUnfolderBase]: For 6187/6187 co-relation queries the response was YES. [2023-08-03 20:23:28,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166316 conditions, 79090 events. 62260/79090 cut-off events. For 6187/6187 co-relation queries the response was YES. Maximal size of possible extension queue 2610. Compared 443029 event pairs, 1682 based on Foata normal form. 1512/54784 useless extension candidates. Maximal degree in co-relation 72283. Up to 66880 conditions per place. [2023-08-03 20:23:28,571 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 100 selfloop transitions, 4 changer transitions 0/119 dead transitions. [2023-08-03 20:23:28,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 119 transitions, 522 flow [2023-08-03 20:23:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:23:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:23:28,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 938 transitions. [2023-08-03 20:23:28,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48350515463917526 [2023-08-03 20:23:28,573 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 938 transitions. [2023-08-03 20:23:28,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 938 transitions. [2023-08-03 20:23:28,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:23:28,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 938 transitions. [2023-08-03 20:23:28,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.6) internal successors, (938), 5 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:28,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:28,577 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 388.0) internal successors, (2328), 6 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:28,577 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 214 flow. Second operand 5 states and 938 transitions. [2023-08-03 20:23:28,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 119 transitions, 522 flow [2023-08-03 20:23:28,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 119 transitions, 510 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:23:28,964 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 219 flow [2023-08-03 20:23:28,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2023-08-03 20:23:28,965 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 9 predicate places. [2023-08-03 20:23:28,965 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 219 flow [2023-08-03 20:23:28,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:28,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:23:28,966 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:23:28,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 20:23:29,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:29,170 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:23:29,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:23:29,170 INFO L85 PathProgramCache]: Analyzing trace with hash -7116719, now seen corresponding path program 1 times [2023-08-03 20:23:29,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:23:29,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333797378] [2023-08-03 20:23:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:29,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:23:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 20:23:29,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:23:29,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333797378] [2023-08-03 20:23:29,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333797378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:23:29,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493002295] [2023-08-03 20:23:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:29,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:29,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:23:29,213 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:23:29,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 20:23:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:29,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:23:29,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:23:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:23:29,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:23:29,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493002295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:23:29,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:23:29,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 20:23:29,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135656352] [2023-08-03 20:23:29,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:23:29,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:23:29,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:23:29,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:23:29,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:23:29,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 388 [2023-08-03 20:23:29,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:29,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:23:29,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 388 [2023-08-03 20:23:29,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:23:33,115 INFO L124 PetriNetUnfolderBase]: 59572/75833 cut-off events. [2023-08-03 20:23:33,115 INFO L125 PetriNetUnfolderBase]: For 22424/22424 co-relation queries the response was YES. [2023-08-03 20:23:33,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164333 conditions, 75833 events. 59572/75833 cut-off events. For 22424/22424 co-relation queries the response was YES. Maximal size of possible extension queue 2415. Compared 422339 event pairs, 31289 based on Foata normal form. 0/51763 useless extension candidates. Maximal degree in co-relation 71612. Up to 61338 conditions per place. [2023-08-03 20:23:33,453 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 81 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-03 20:23:33,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 451 flow [2023-08-03 20:23:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:23:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:23:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2023-08-03 20:23:33,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017182130584192 [2023-08-03 20:23:33,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2023-08-03 20:23:33,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2023-08-03 20:23:33,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:23:33,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2023-08-03 20:23:33,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:33,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:33,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:33,457 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 219 flow. Second operand 3 states and 584 transitions. [2023-08-03 20:23:33,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 451 flow [2023-08-03 20:23:33,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 444 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:23:33,568 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 224 flow [2023-08-03 20:23:33,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2023-08-03 20:23:33,569 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 10 predicate places. [2023-08-03 20:23:33,569 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 224 flow [2023-08-03 20:23:33,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:33,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:23:33,569 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:23:33,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 20:23:33,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:33,774 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:23:33,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:23:33,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1483226025, now seen corresponding path program 1 times [2023-08-03 20:23:33,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:23:33,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83485919] [2023-08-03 20:23:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:33,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:23:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:23:33,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:23:33,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83485919] [2023-08-03 20:23:33,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83485919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:23:33,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679477072] [2023-08-03 20:23:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:33,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:33,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:23:33,813 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:23:33,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 20:23:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:33,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:23:33,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:23:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:23:33,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:23:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:23:33,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679477072] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:23:33,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:23:33,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:23:33,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718453399] [2023-08-03 20:23:33,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:23:33,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:23:33,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:23:33,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:23:33,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:23:33,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 388 [2023-08-03 20:23:33,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:33,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:23:33,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 388 [2023-08-03 20:23:33,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:23:37,785 INFO L124 PetriNetUnfolderBase]: 57532/73428 cut-off events. [2023-08-03 20:23:37,785 INFO L125 PetriNetUnfolderBase]: For 11760/11760 co-relation queries the response was YES. [2023-08-03 20:23:37,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158975 conditions, 73428 events. 57532/73428 cut-off events. For 11760/11760 co-relation queries the response was YES. Maximal size of possible extension queue 2365. Compared 415230 event pairs, 17038 based on Foata normal form. 216/50801 useless extension candidates. Maximal degree in co-relation 124068. Up to 61427 conditions per place. [2023-08-03 20:23:38,131 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 91 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2023-08-03 20:23:38,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 109 transitions, 486 flow [2023-08-03 20:23:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:23:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:23:38,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 760 transitions. [2023-08-03 20:23:38,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896907216494845 [2023-08-03 20:23:38,133 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 760 transitions. [2023-08-03 20:23:38,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 760 transitions. [2023-08-03 20:23:38,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:23:38,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 760 transitions. [2023-08-03 20:23:38,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:38,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:38,136 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:38,136 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 224 flow. Second operand 4 states and 760 transitions. [2023-08-03 20:23:38,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 109 transitions, 486 flow [2023-08-03 20:23:39,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 484 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:23:39,304 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 220 flow [2023-08-03 20:23:39,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2023-08-03 20:23:39,305 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 12 predicate places. [2023-08-03 20:23:39,305 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 220 flow [2023-08-03 20:23:39,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:39,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:23:39,306 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:23:39,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-03 20:23:39,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:39,511 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:23:39,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:23:39,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1314494408, now seen corresponding path program 1 times [2023-08-03 20:23:39,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:23:39,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65935947] [2023-08-03 20:23:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:39,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:23:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:23:39,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:23:39,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65935947] [2023-08-03 20:23:39,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65935947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:23:39,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901668431] [2023-08-03 20:23:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:39,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:39,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:23:39,558 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:23:39,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 20:23:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:39,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:23:39,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:23:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:23:39,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:23:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:23:39,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901668431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:23:39,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:23:39,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:23:39,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490717118] [2023-08-03 20:23:39,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:23:39,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:23:39,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:23:39,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:23:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:23:39,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 388 [2023-08-03 20:23:39,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 172.2) internal successors, (861), 5 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:39,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:23:39,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 388 [2023-08-03 20:23:39,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:23:42,891 INFO L124 PetriNetUnfolderBase]: 47042/59774 cut-off events. [2023-08-03 20:23:42,891 INFO L125 PetriNetUnfolderBase]: For 20171/20171 co-relation queries the response was YES. [2023-08-03 20:23:43,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130499 conditions, 59774 events. 47042/59774 cut-off events. For 20171/20171 co-relation queries the response was YES. Maximal size of possible extension queue 2043. Compared 322010 event pairs, 11114 based on Foata normal form. 972/41857 useless extension candidates. Maximal degree in co-relation 125616. Up to 23748 conditions per place. [2023-08-03 20:23:43,165 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 102 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-08-03 20:23:43,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 121 transitions, 544 flow [2023-08-03 20:23:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:23:43,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:23:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 772 transitions. [2023-08-03 20:23:43,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49742268041237114 [2023-08-03 20:23:43,168 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 772 transitions. [2023-08-03 20:23:43,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 772 transitions. [2023-08-03 20:23:43,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:23:43,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 772 transitions. [2023-08-03 20:23:43,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:43,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:43,172 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:43,172 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 220 flow. Second operand 4 states and 772 transitions. [2023-08-03 20:23:43,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 121 transitions, 544 flow [2023-08-03 20:23:43,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 121 transitions, 538 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:23:43,312 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 234 flow [2023-08-03 20:23:43,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-08-03 20:23:43,313 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 14 predicate places. [2023-08-03 20:23:43,313 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 234 flow [2023-08-03 20:23:43,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.2) internal successors, (861), 5 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:43,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:23:43,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:23:43,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 20:23:43,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:43,515 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:23:43,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:23:43,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1461316964, now seen corresponding path program 1 times [2023-08-03 20:23:43,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:23:43,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731703449] [2023-08-03 20:23:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:43,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:23:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:23:43,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:23:43,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731703449] [2023-08-03 20:23:43,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731703449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:23:43,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098816682] [2023-08-03 20:23:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:43,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:23:43,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:23:43,560 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:23:43,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 20:23:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:43,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:23:43,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:23:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:23:43,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:23:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:23:43,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098816682] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:23:43,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:23:43,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 20:23:43,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275128647] [2023-08-03 20:23:43,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:23:43,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:23:43,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:23:43,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:23:43,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:23:43,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 388 [2023-08-03 20:23:43,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 234 flow. Second operand has 5 states, 5 states have (on average 172.6) internal successors, (863), 5 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:43,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:23:43,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 388 [2023-08-03 20:23:43,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:23:46,882 INFO L124 PetriNetUnfolderBase]: 47009/59717 cut-off events. [2023-08-03 20:23:46,883 INFO L125 PetriNetUnfolderBase]: For 28013/28013 co-relation queries the response was YES. [2023-08-03 20:23:47,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136593 conditions, 59717 events. 47009/59717 cut-off events. For 28013/28013 co-relation queries the response was YES. Maximal size of possible extension queue 2043. Compared 320589 event pairs, 28785 based on Foata normal form. 26/40867 useless extension candidates. Maximal degree in co-relation 131588. Up to 55892 conditions per place. [2023-08-03 20:23:47,144 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 99 selfloop transitions, 3 changer transitions 5/122 dead transitions. [2023-08-03 20:23:47,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 122 transitions, 560 flow [2023-08-03 20:23:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:23:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:23:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 772 transitions. [2023-08-03 20:23:47,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49742268041237114 [2023-08-03 20:23:47,146 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 772 transitions. [2023-08-03 20:23:47,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 772 transitions. [2023-08-03 20:23:47,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:23:47,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 772 transitions. [2023-08-03 20:23:47,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:47,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:47,149 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:47,149 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 234 flow. Second operand 4 states and 772 transitions. [2023-08-03 20:23:47,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 122 transitions, 560 flow [2023-08-03 20:23:47,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 122 transitions, 556 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 20:23:47,461 INFO L231 Difference]: Finished difference. Result has 80 places, 68 transitions, 236 flow [2023-08-03 20:23:47,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=80, PETRI_TRANSITIONS=68} [2023-08-03 20:23:47,461 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 18 predicate places. [2023-08-03 20:23:47,461 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 68 transitions, 236 flow [2023-08-03 20:23:47,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.6) internal successors, (863), 5 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:47,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:23:47,462 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:23:47,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-03 20:23:47,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-03 20:23:47,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:23:47,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:23:47,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1007965103, now seen corresponding path program 1 times [2023-08-03 20:23:47,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:23:47,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408178792] [2023-08-03 20:23:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:47,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:23:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 20:23:47,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:23:47,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408178792] [2023-08-03 20:23:47,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408178792] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:23:47,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:23:47,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 20:23:47,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448058657] [2023-08-03 20:23:47,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:23:47,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:23:47,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:23:47,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:23:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:23:47,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 388 [2023-08-03 20:23:47,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 68 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:47,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:23:47,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 388 [2023-08-03 20:23:47,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:23:53,075 INFO L124 PetriNetUnfolderBase]: 72706/97887 cut-off events. [2023-08-03 20:23:53,075 INFO L125 PetriNetUnfolderBase]: For 47536/47536 co-relation queries the response was YES. [2023-08-03 20:23:53,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217333 conditions, 97887 events. 72706/97887 cut-off events. For 47536/47536 co-relation queries the response was YES. Maximal size of possible extension queue 3096. Compared 640197 event pairs, 20014 based on Foata normal form. 1/73486 useless extension candidates. Maximal degree in co-relation 216693. Up to 56527 conditions per place. [2023-08-03 20:23:53,797 INFO L140 encePairwiseOnDemand]: 384/388 looper letters, 99 selfloop transitions, 3 changer transitions 1/117 dead transitions. [2023-08-03 20:23:53,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 631 flow [2023-08-03 20:23:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:23:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:23:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2023-08-03 20:23:53,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180412371134021 [2023-08-03 20:23:53,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2023-08-03 20:23:53,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2023-08-03 20:23:53,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:23:53,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2023-08-03 20:23:53,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:53,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:53,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:53,802 INFO L175 Difference]: Start difference. First operand has 80 places, 68 transitions, 236 flow. Second operand 3 states and 603 transitions. [2023-08-03 20:23:53,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 631 flow [2023-08-03 20:23:54,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 615 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 20:23:54,244 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 247 flow [2023-08-03 20:23:54,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2023-08-03 20:23:54,245 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 17 predicate places. [2023-08-03 20:23:54,245 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 247 flow [2023-08-03 20:23:54,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:54,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:23:54,245 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:23:54,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 20:23:54,245 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:23:54,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:23:54,246 INFO L85 PathProgramCache]: Analyzing trace with hash -30606709, now seen corresponding path program 1 times [2023-08-03 20:23:54,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:23:54,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995422889] [2023-08-03 20:23:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:23:54,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:23:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:23:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:23:54,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:23:54,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995422889] [2023-08-03 20:23:54,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995422889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:23:54,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:23:54,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:23:54,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102706842] [2023-08-03 20:23:54,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:23:54,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:23:54,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:23:54,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:23:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 20:23:54,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 388 [2023-08-03 20:23:54,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:23:54,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:23:54,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 388 [2023-08-03 20:23:54,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:24:02,194 INFO L124 PetriNetUnfolderBase]: 107944/142228 cut-off events. [2023-08-03 20:24:02,194 INFO L125 PetriNetUnfolderBase]: For 61220/61220 co-relation queries the response was YES. [2023-08-03 20:24:02,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327549 conditions, 142228 events. 107944/142228 cut-off events. For 61220/61220 co-relation queries the response was YES. Maximal size of possible extension queue 4020. Compared 919552 event pairs, 17691 based on Foata normal form. 0/108549 useless extension candidates. Maximal degree in co-relation 326652. Up to 120951 conditions per place. [2023-08-03 20:24:03,018 INFO L140 encePairwiseOnDemand]: 380/388 looper letters, 123 selfloop transitions, 12 changer transitions 6/154 dead transitions. [2023-08-03 20:24:03,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 154 transitions, 849 flow [2023-08-03 20:24:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:24:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:24:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 783 transitions. [2023-08-03 20:24:03,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045103092783505 [2023-08-03 20:24:03,020 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 783 transitions. [2023-08-03 20:24:03,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 783 transitions. [2023-08-03 20:24:03,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:24:03,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 783 transitions. [2023-08-03 20:24:03,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.75) internal successors, (783), 4 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:03,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:03,024 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:03,024 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 247 flow. Second operand 4 states and 783 transitions. [2023-08-03 20:24:03,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 154 transitions, 849 flow [2023-08-03 20:24:03,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 154 transitions, 846 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:24:03,325 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 317 flow [2023-08-03 20:24:03,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2023-08-03 20:24:03,326 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 21 predicate places. [2023-08-03 20:24:03,326 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 317 flow [2023-08-03 20:24:03,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:03,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:24:03,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:24:03,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 20:24:03,327 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:24:03,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:24:03,327 INFO L85 PathProgramCache]: Analyzing trace with hash -846956042, now seen corresponding path program 1 times [2023-08-03 20:24:03,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:24:03,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614923877] [2023-08-03 20:24:03,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:24:03,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:24:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:24:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:24:03,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:24:03,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614923877] [2023-08-03 20:24:03,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614923877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:24:03,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:24:03,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:24:03,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243408187] [2023-08-03 20:24:03,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:24:03,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:24:03,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:24:03,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:24:03,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 20:24:03,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 388 [2023-08-03 20:24:03,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:03,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:24:03,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 388 [2023-08-03 20:24:03,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:24:11,518 INFO L124 PetriNetUnfolderBase]: 101308/135595 cut-off events. [2023-08-03 20:24:11,518 INFO L125 PetriNetUnfolderBase]: For 79033/79696 co-relation queries the response was YES. [2023-08-03 20:24:12,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333196 conditions, 135595 events. 101308/135595 cut-off events. For 79033/79696 co-relation queries the response was YES. Maximal size of possible extension queue 3512. Compared 896145 event pairs, 24098 based on Foata normal form. 663/109170 useless extension candidates. Maximal degree in co-relation 333077. Up to 119326 conditions per place. [2023-08-03 20:24:12,433 INFO L140 encePairwiseOnDemand]: 381/388 looper letters, 110 selfloop transitions, 18 changer transitions 10/152 dead transitions. [2023-08-03 20:24:12,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 152 transitions, 888 flow [2023-08-03 20:24:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:24:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:24:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 772 transitions. [2023-08-03 20:24:12,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49742268041237114 [2023-08-03 20:24:12,435 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 772 transitions. [2023-08-03 20:24:12,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 772 transitions. [2023-08-03 20:24:12,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:24:12,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 772 transitions. [2023-08-03 20:24:12,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:12,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:12,438 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 388.0) internal successors, (1940), 5 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:12,438 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 317 flow. Second operand 4 states and 772 transitions. [2023-08-03 20:24:12,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 152 transitions, 888 flow [2023-08-03 20:24:12,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 152 transitions, 888 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:24:12,614 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 408 flow [2023-08-03 20:24:12,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=408, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2023-08-03 20:24:12,614 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 26 predicate places. [2023-08-03 20:24:12,614 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 408 flow [2023-08-03 20:24:12,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:12,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:24:12,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:24:12,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-03 20:24:12,615 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:24:12,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:24:12,615 INFO L85 PathProgramCache]: Analyzing trace with hash 224440760, now seen corresponding path program 1 times [2023-08-03 20:24:12,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:24:12,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296958184] [2023-08-03 20:24:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:24:12,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:24:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:24:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:24:12,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:24:12,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296958184] [2023-08-03 20:24:12,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296958184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:24:12,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:24:12,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:24:12,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139978518] [2023-08-03 20:24:12,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:24:12,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:24:12,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:24:12,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:24:12,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:24:12,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 388 [2023-08-03 20:24:12,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 408 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:12,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:24:12,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 388 [2023-08-03 20:24:12,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:24:22,627 INFO L124 PetriNetUnfolderBase]: 112697/154232 cut-off events. [2023-08-03 20:24:22,628 INFO L125 PetriNetUnfolderBase]: For 98170/99148 co-relation queries the response was YES. [2023-08-03 20:24:23,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396770 conditions, 154232 events. 112697/154232 cut-off events. For 98170/99148 co-relation queries the response was YES. Maximal size of possible extension queue 4767. Compared 1092587 event pairs, 66982 based on Foata normal form. 978/131227 useless extension candidates. Maximal degree in co-relation 395398. Up to 91655 conditions per place. [2023-08-03 20:24:24,040 INFO L140 encePairwiseOnDemand]: 385/388 looper letters, 111 selfloop transitions, 6 changer transitions 0/134 dead transitions. [2023-08-03 20:24:24,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 134 transitions, 841 flow [2023-08-03 20:24:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:24:24,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:24:24,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2023-08-03 20:24:24,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120274914089347 [2023-08-03 20:24:24,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2023-08-03 20:24:24,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2023-08-03 20:24:24,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:24:24,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2023-08-03 20:24:24,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:24,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:24,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 388.0) internal successors, (1552), 4 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:24,044 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 408 flow. Second operand 3 states and 596 transitions. [2023-08-03 20:24:24,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 134 transitions, 841 flow [2023-08-03 20:24:26,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 134 transitions, 820 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:24:26,009 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 389 flow [2023-08-03 20:24:26,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=389, PETRI_PLACES=90, PETRI_TRANSITIONS=85} [2023-08-03 20:24:26,009 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 28 predicate places. [2023-08-03 20:24:26,009 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 389 flow [2023-08-03 20:24:26,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:26,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:24:26,010 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:24:26,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-03 20:24:26,010 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:24:26,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:24:26,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1074241237, now seen corresponding path program 1 times [2023-08-03 20:24:26,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:24:26,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306752967] [2023-08-03 20:24:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:24:26,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:24:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:24:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 20:24:26,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:24:26,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306752967] [2023-08-03 20:24:26,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306752967] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:24:26,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532051577] [2023-08-03 20:24:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:24:26,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:24:26,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:24:26,141 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:24:26,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 20:24:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:24:26,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 20:24:26,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:24:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:24:26,300 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:24:26,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532051577] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:24:26,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:24:26,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-03 20:24:26,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030398136] [2023-08-03 20:24:26,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:24:26,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:24:26,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:24:26,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:24:26,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-03 20:24:26,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 388 [2023-08-03 20:24:26,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 85 transitions, 389 flow. Second operand has 5 states, 5 states have (on average 166.4) internal successors, (832), 5 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:24:26,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:24:26,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 388 [2023-08-03 20:24:26,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:25:08,455 INFO L124 PetriNetUnfolderBase]: 467580/632670 cut-off events. [2023-08-03 20:25:08,455 INFO L125 PetriNetUnfolderBase]: For 465672/465672 co-relation queries the response was YES. [2023-08-03 20:25:11,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1641393 conditions, 632670 events. 467580/632670 cut-off events. For 465672/465672 co-relation queries the response was YES. Maximal size of possible extension queue 15700. Compared 4979345 event pairs, 113285 based on Foata normal form. 4768/558480 useless extension candidates. Maximal degree in co-relation 1635328. Up to 200589 conditions per place. [2023-08-03 20:25:13,616 INFO L140 encePairwiseOnDemand]: 374/388 looper letters, 326 selfloop transitions, 52 changer transitions 6/395 dead transitions. [2023-08-03 20:25:13,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 395 transitions, 2441 flow [2023-08-03 20:25:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 20:25:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 20:25:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1765 transitions. [2023-08-03 20:25:13,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054410080183276 [2023-08-03 20:25:13,620 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1765 transitions. [2023-08-03 20:25:13,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1765 transitions. [2023-08-03 20:25:13,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:25:13,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1765 transitions. [2023-08-03 20:25:13,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 196.11111111111111) internal successors, (1765), 9 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:25:13,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 388.0) internal successors, (3880), 10 states have internal predecessors, (3880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:25:13,625 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 388.0) internal successors, (3880), 10 states have internal predecessors, (3880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:25:13,625 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 389 flow. Second operand 9 states and 1765 transitions. [2023-08-03 20:25:13,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 395 transitions, 2441 flow [2023-08-03 20:25:22,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 395 transitions, 2426 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:25:22,417 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 815 flow [2023-08-03 20:25:22,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=388, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=815, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2023-08-03 20:25:22,418 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 41 predicate places. [2023-08-03 20:25:22,418 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 815 flow [2023-08-03 20:25:22,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 166.4) internal successors, (832), 5 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:25:22,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:25:22,418 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:25:22,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 20:25:22,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-03 20:25:22,619 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:25:22,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:25:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1090176627, now seen corresponding path program 2 times [2023-08-03 20:25:22,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:25:22,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493867646] [2023-08-03 20:25:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:25:22,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:25:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:25:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:25:22,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:25:22,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493867646] [2023-08-03 20:25:22,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493867646] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:25:22,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918191877] [2023-08-03 20:25:22,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:25:22,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:25:22,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:25:22,766 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:25:22,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 20:25:22,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:25:22,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:25:22,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 20:25:22,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:25:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:25:22,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:25:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:25:23,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918191877] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-03 20:25:23,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-03 20:25:23,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 11 [2023-08-03 20:25:23,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236801448] [2023-08-03 20:25:23,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:25:23,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:25:23,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:25:23,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:25:23,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-08-03 20:25:23,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 388 [2023-08-03 20:25:23,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 815 flow. Second operand has 5 states, 5 states have (on average 165.6) internal successors, (828), 5 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:25:23,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:25:23,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 388 [2023-08-03 20:25:23,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:26:39,830 INFO L124 PetriNetUnfolderBase]: 682704/930671 cut-off events. [2023-08-03 20:26:39,830 INFO L125 PetriNetUnfolderBase]: For 2441965/2447704 co-relation queries the response was YES. [2023-08-03 20:26:45,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3165948 conditions, 930671 events. 682704/930671 cut-off events. For 2441965/2447704 co-relation queries the response was YES. Maximal size of possible extension queue 24182. Compared 7745818 event pairs, 117870 based on Foata normal form. 5930/826514 useless extension candidates. Maximal degree in co-relation 3165705. Up to 240189 conditions per place. [2023-08-03 20:26:49,992 INFO L140 encePairwiseOnDemand]: 378/388 looper letters, 300 selfloop transitions, 44 changer transitions 0/355 dead transitions. [2023-08-03 20:26:49,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 355 transitions, 2891 flow [2023-08-03 20:26:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 20:26:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 20:26:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1164 transitions. [2023-08-03 20:26:49,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-03 20:26:49,994 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1164 transitions. [2023-08-03 20:26:49,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1164 transitions. [2023-08-03 20:26:49,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:26:49,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1164 transitions. [2023-08-03 20:26:49,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:26:50,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:26:50,013 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 388.0) internal successors, (2716), 7 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:26:50,013 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 815 flow. Second operand 6 states and 1164 transitions. [2023-08-03 20:26:50,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 355 transitions, 2891 flow