/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:01:52,463 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:01:52,547 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:01:52,553 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:01:52,553 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:01:52,554 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:01:52,554 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:01:52,581 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:01:52,582 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:01:52,586 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:01:52,586 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:01:52,587 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:01:52,588 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:01:52,589 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:01:52,589 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:01:52,589 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:01:52,590 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:01:52,590 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:01:52,590 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:01:52,590 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:01:52,590 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:01:52,591 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:01:52,591 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:01:52,591 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:01:52,591 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:01:52,593 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:01:52,593 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:01:52,593 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:01:52,594 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:01:52,594 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:01:52,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:01:52,595 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:01:52,595 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:01:52,595 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:01:52,595 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:01:52,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:01:52,596 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:01:52,596 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:01:52,596 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:01:52,596 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:01:52,596 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:01:52,596 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:01:52,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:01:52,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:01:52,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:01:52,843 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:01:52,844 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:01:52,845 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum.wvr_bound2.c [2023-08-04 03:01:54,026 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:01:54,206 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:01:54,207 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum.wvr_bound2.c [2023-08-04 03:01:54,214 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25a57ec74/bc3b9a0cb1db4d12bfc3b0ae8270669b/FLAG1992384a1 [2023-08-04 03:01:54,228 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25a57ec74/bc3b9a0cb1db4d12bfc3b0ae8270669b [2023-08-04 03:01:54,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:01:54,232 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:01:54,233 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:01:54,233 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:01:54,236 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:01:54,237 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:01:54" (1/1) ... [2023-08-04 03:01:54,238 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e4de239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54, skipping insertion in model container [2023-08-04 03:01:54,238 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:01:54" (1/1) ... [2023-08-04 03:01:54,260 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:01:54,407 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-more-array-sum.wvr_bound2.c[3078,3091] [2023-08-04 03:01:54,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:01:54,422 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:01:54,445 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-more-array-sum.wvr_bound2.c[3078,3091] [2023-08-04 03:01:54,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:01:54,458 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:01:54,458 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:01:54,466 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:01:54,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54 WrapperNode [2023-08-04 03:01:54,467 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:01:54,469 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:01:54,469 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:01:54,469 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:01:54,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54" (1/1) ... [2023-08-04 03:01:54,482 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54" (1/1) ... [2023-08-04 03:01:54,512 INFO L138 Inliner]: procedures = 25, calls = 58, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 332 [2023-08-04 03:01:54,513 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:01:54,513 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:01:54,513 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:01:54,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:01:54,521 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54" (1/1) ... [2023-08-04 03:01:54,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54" (1/1) ... [2023-08-04 03:01:54,530 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54" (1/1) ... [2023-08-04 03:01:54,530 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54" (1/1) ... [2023-08-04 03:01:54,539 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54" (1/1) ... [2023-08-04 03:01:54,544 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54" (1/1) ... [2023-08-04 03:01:54,546 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54" (1/1) ... [2023-08-04 03:01:54,548 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54" (1/1) ... [2023-08-04 03:01:54,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:01:54,553 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:01:54,553 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:01:54,553 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:01:54,554 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54" (1/1) ... [2023-08-04 03:01:54,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:01:54,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:01:54,599 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) [2023-08-04 03:01:54,627 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 [2023-08-04 03:01:54,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:01:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:01:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:01:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:01:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:01:54,642 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:01:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:01:54,642 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:01:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 03:01:54,644 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 03:01:54,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:01:54,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:01:54,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:01:54,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:01:54,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:01:54,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:01:54,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:01:54,647 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 03:01:54,778 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:01:54,781 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:01:55,288 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:01:55,564 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:01:55,564 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-04 03:01:55,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:01:55 BoogieIcfgContainer [2023-08-04 03:01:55,567 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:01:55,571 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:01:55,572 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:01:55,575 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:01:55,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:01:54" (1/3) ... [2023-08-04 03:01:55,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf70d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:01:55, skipping insertion in model container [2023-08-04 03:01:55,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:54" (2/3) ... [2023-08-04 03:01:55,576 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf70d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:01:55, skipping insertion in model container [2023-08-04 03:01:55,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:01:55" (3/3) ... [2023-08-04 03:01:55,577 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-array-sum.wvr_bound2.c [2023-08-04 03:01:55,583 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:01:55,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:01:55,590 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:01:55,591 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:01:55,664 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 03:01:55,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 231 transitions, 504 flow [2023-08-04 03:01:55,920 INFO L124 PetriNetUnfolderBase]: 105/703 cut-off events. [2023-08-04 03:01:55,920 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:01:55,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 703 events. 105/703 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3327 event pairs, 0 based on Foata normal form. 0/588 useless extension candidates. Maximal degree in co-relation 412. Up to 16 conditions per place. [2023-08-04 03:01:55,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 231 transitions, 504 flow [2023-08-04 03:01:55,944 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 231 transitions, 504 flow [2023-08-04 03:01:55,947 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:01:55,980 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 231 transitions, 504 flow [2023-08-04 03:01:55,984 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 231 transitions, 504 flow [2023-08-04 03:01:55,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 231 transitions, 504 flow [2023-08-04 03:01:56,060 INFO L124 PetriNetUnfolderBase]: 105/703 cut-off events. [2023-08-04 03:01:56,060 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:01:56,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 703 events. 105/703 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3327 event pairs, 0 based on Foata normal form. 0/588 useless extension candidates. Maximal degree in co-relation 412. Up to 16 conditions per place. [2023-08-04 03:01:56,076 INFO L119 LiptonReduction]: Number of co-enabled transitions 5808 [2023-08-04 03:02:02,310 INFO L134 LiptonReduction]: Checked pairs total: 11121 [2023-08-04 03:02:02,310 INFO L136 LiptonReduction]: Total number of compositions: 212 [2023-08-04 03:02:02,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:02:02,330 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;@63fcaf6b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:02:02,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:02:02,337 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:02:02,337 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-08-04 03:02:02,337 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:02:02,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:02:02,338 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:02,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:02:02,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:02:02,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1556583507, now seen corresponding path program 1 times [2023-08-04 03:02:02,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:02:02,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141136986] [2023-08-04 03:02:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:02,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:02:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 03:02:03,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:02:03,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141136986] [2023-08-04 03:02:03,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141136986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:02:03,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:02:03,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:02:03,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435170449] [2023-08-04 03:02:03,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:02:03,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 03:02:03,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:02:03,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 03:02:03,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 03:02:03,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 443 [2023-08-04 03:02:03,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 54 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 191.5) internal successors, (766), 4 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:03,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:02:03,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 443 [2023-08-04 03:02:03,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:02:04,062 INFO L124 PetriNetUnfolderBase]: 4330/6085 cut-off events. [2023-08-04 03:02:04,062 INFO L125 PetriNetUnfolderBase]: For 333/333 co-relation queries the response was YES. [2023-08-04 03:02:04,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12258 conditions, 6085 events. 4330/6085 cut-off events. For 333/333 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 31436 event pairs, 2418 based on Foata normal form. 1/3869 useless extension candidates. Maximal degree in co-relation 9872. Up to 5804 conditions per place. [2023-08-04 03:02:04,081 INFO L140 encePairwiseOnDemand]: 437/443 looper letters, 23 selfloop transitions, 4 changer transitions 23/56 dead transitions. [2023-08-04 03:02:04,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 248 flow [2023-08-04 03:02:04,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:02:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:02:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 811 transitions. [2023-08-04 03:02:04,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45767494356659144 [2023-08-04 03:02:04,097 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 811 transitions. [2023-08-04 03:02:04,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 811 transitions. [2023-08-04 03:02:04,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:02:04,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 811 transitions. [2023-08-04 03:02:04,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:04,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:04,114 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:04,116 INFO L175 Difference]: Start difference. First operand has 47 places, 54 transitions, 150 flow. Second operand 4 states and 811 transitions. [2023-08-04 03:02:04,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 248 flow [2023-08-04 03:02:04,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:02:04,122 INFO L231 Difference]: Finished difference. Result has 51 places, 33 transitions, 103 flow [2023-08-04 03:02:04,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=51, PETRI_TRANSITIONS=33} [2023-08-04 03:02:04,127 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-08-04 03:02:04,127 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 33 transitions, 103 flow [2023-08-04 03:02:04,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.5) internal successors, (766), 4 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:04,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:02:04,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:04,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:02:04,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:02:04,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:02:04,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1015486050, now seen corresponding path program 1 times [2023-08-04 03:02:04,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:02:04,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549142600] [2023-08-04 03:02:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:04,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:02:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:02:04,157 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:02:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:02:04,191 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:02:04,191 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:02:04,193 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:02:04,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:02:04,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:02:04,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 03:02:04,195 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 03:02:04,196 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 03:02:04,197 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:02:04,197 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:02:04,248 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 03:02:04,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 276 transitions, 642 flow [2023-08-04 03:02:04,800 INFO L124 PetriNetUnfolderBase]: 895/4211 cut-off events. [2023-08-04 03:02:04,800 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:02:04,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4885 conditions, 4211 events. 895/4211 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33751 event pairs, 11 based on Foata normal form. 0/3560 useless extension candidates. Maximal degree in co-relation 2504. Up to 192 conditions per place. [2023-08-04 03:02:04,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 276 transitions, 642 flow [2023-08-04 03:02:04,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 276 transitions, 642 flow [2023-08-04 03:02:04,877 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:02:04,877 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 276 transitions, 642 flow [2023-08-04 03:02:04,878 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 276 transitions, 642 flow [2023-08-04 03:02:04,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 276 transitions, 642 flow [2023-08-04 03:02:05,385 INFO L124 PetriNetUnfolderBase]: 895/4211 cut-off events. [2023-08-04 03:02:05,385 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:02:05,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4885 conditions, 4211 events. 895/4211 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33751 event pairs, 11 based on Foata normal form. 0/3560 useless extension candidates. Maximal degree in co-relation 2504. Up to 192 conditions per place. [2023-08-04 03:02:05,513 INFO L119 LiptonReduction]: Number of co-enabled transitions 15180 [2023-08-04 03:02:12,161 INFO L134 LiptonReduction]: Checked pairs total: 35581 [2023-08-04 03:02:12,161 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-08-04 03:02:12,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:02:12,164 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;@63fcaf6b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:02:12,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:02:12,173 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:02:12,173 INFO L124 PetriNetUnfolderBase]: 17/128 cut-off events. [2023-08-04 03:02:12,174 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 03:02:12,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:02:12,174 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:12,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:02:12,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:02:12,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1666103251, now seen corresponding path program 1 times [2023-08-04 03:02:12,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:02:12,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473498492] [2023-08-04 03:02:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:12,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:02:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:02:12,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:02:12,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473498492] [2023-08-04 03:02:12,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473498492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:02:12,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077176977] [2023-08-04 03:02:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:12,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:02:12,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:02:12,237 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) [2023-08-04 03:02:12,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 03:02:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:12,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:02:12,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:02:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:02:12,411 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:02:12,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077176977] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:02:12,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:02:12,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:02:12,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554608383] [2023-08-04 03:02:12,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:02:12,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:02:12,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:02:12,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:02:12,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:02:12,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 509 [2023-08-04 03:02:12,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:12,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:02:12,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 509 [2023-08-04 03:02:12,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:03:50,976 INFO L124 PetriNetUnfolderBase]: 1064857/1272020 cut-off events. [2023-08-04 03:03:50,977 INFO L125 PetriNetUnfolderBase]: For 124846/124846 co-relation queries the response was YES. [2023-08-04 03:03:54,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2572861 conditions, 1272020 events. 1064857/1272020 cut-off events. For 124846/124846 co-relation queries the response was YES. Maximal size of possible extension queue 25715. Compared 7015983 event pairs, 428941 based on Foata normal form. 0/805308 useless extension candidates. Maximal degree in co-relation 911959. Up to 1236599 conditions per place. [2023-08-04 03:03:56,436 INFO L140 encePairwiseOnDemand]: 504/509 looper letters, 45 selfloop transitions, 5 changer transitions 31/92 dead transitions. [2023-08-04 03:03:56,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 426 flow [2023-08-04 03:03:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:03:56,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:03:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1180 transitions. [2023-08-04 03:03:56,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636542239685658 [2023-08-04 03:03:56,441 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1180 transitions. [2023-08-04 03:03:56,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1180 transitions. [2023-08-04 03:03:56,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:03:56,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1180 transitions. [2023-08-04 03:03:56,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:56,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:56,451 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:56,451 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 252 flow. Second operand 5 states and 1180 transitions. [2023-08-04 03:03:56,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 426 flow [2023-08-04 03:03:56,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:03:56,506 INFO L231 Difference]: Finished difference. Result has 69 places, 51 transitions, 149 flow [2023-08-04 03:03:56,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=69, PETRI_TRANSITIONS=51} [2023-08-04 03:03:56,507 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2023-08-04 03:03:56,507 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 51 transitions, 149 flow [2023-08-04 03:03:56,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:56,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:03:56,508 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:03:56,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 03:03:56,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:03:56,715 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:03:56,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:03:56,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1311957259, now seen corresponding path program 1 times [2023-08-04 03:03:56,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:03:56,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542735242] [2023-08-04 03:03:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:03:56,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:03:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:03:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:03:56,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:03:56,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542735242] [2023-08-04 03:03:56,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542735242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:03:56,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:03:56,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:03:56,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511918994] [2023-08-04 03:03:56,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:03:56,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:03:56,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:03:56,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:03:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:03:56,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 509 [2023-08-04 03:03:56,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 51 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:56,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:03:56,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 509 [2023-08-04 03:03:56,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:04:10,026 INFO L124 PetriNetUnfolderBase]: 163387/192447 cut-off events. [2023-08-04 03:04:10,027 INFO L125 PetriNetUnfolderBase]: For 6197/6197 co-relation queries the response was YES. [2023-08-04 03:04:10,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390051 conditions, 192447 events. 163387/192447 cut-off events. For 6197/6197 co-relation queries the response was YES. Maximal size of possible extension queue 3961. Compared 828014 event pairs, 82029 based on Foata normal form. 1/124293 useless extension candidates. Maximal degree in co-relation 166567. Up to 189778 conditions per place. [2023-08-04 03:04:11,261 INFO L140 encePairwiseOnDemand]: 506/509 looper letters, 41 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 03:04:11,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 240 flow [2023-08-04 03:04:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:04:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:04:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 706 transitions. [2023-08-04 03:04:11,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623444662737394 [2023-08-04 03:04:11,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 706 transitions. [2023-08-04 03:04:11,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 706 transitions. [2023-08-04 03:04:11,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:04:11,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 706 transitions. [2023-08-04 03:04:11,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:11,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 509.0) internal successors, (2036), 4 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:11,271 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 509.0) internal successors, (2036), 4 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:11,271 INFO L175 Difference]: Start difference. First operand has 69 places, 51 transitions, 149 flow. Second operand 3 states and 706 transitions. [2023-08-04 03:04:11,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 240 flow [2023-08-04 03:04:11,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 235 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 03:04:11,278 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 143 flow [2023-08-04 03:04:11,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2023-08-04 03:04:11,279 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -11 predicate places. [2023-08-04 03:04:11,279 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 143 flow [2023-08-04 03:04:11,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:11,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:04:11,280 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:04:11,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 03:04:11,281 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:04:11,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:04:11,281 INFO L85 PathProgramCache]: Analyzing trace with hash -503487972, now seen corresponding path program 1 times [2023-08-04 03:04:11,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:04:11,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418428060] [2023-08-04 03:04:11,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:04:11,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:04:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:04:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:04:11,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:04:11,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418428060] [2023-08-04 03:04:11,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418428060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:04:11,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936250492] [2023-08-04 03:04:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:04:11,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:04:11,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:04:11,330 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) [2023-08-04 03:04:11,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 03:04:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:04:11,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:04:11,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:04:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:04:11,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:04:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:04:11,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936250492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:04:11,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:04:11,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:04:11,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824990969] [2023-08-04 03:04:11,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:04:11,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:04:11,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:04:11,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:04:11,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:04:11,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 509 [2023-08-04 03:04:11,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 223.0) internal successors, (1115), 5 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:11,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:04:11,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 509 [2023-08-04 03:04:11,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:04:22,257 INFO L124 PetriNetUnfolderBase]: 135935/159203 cut-off events. [2023-08-04 03:04:22,257 INFO L125 PetriNetUnfolderBase]: For 4299/4299 co-relation queries the response was YES. [2023-08-04 03:04:22,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321883 conditions, 159203 events. 135935/159203 cut-off events. For 4299/4299 co-relation queries the response was YES. Maximal size of possible extension queue 3498. Compared 657114 event pairs, 51635 based on Foata normal form. 4/102596 useless extension candidates. Maximal degree in co-relation 166199. Up to 156994 conditions per place. [2023-08-04 03:04:23,268 INFO L140 encePairwiseOnDemand]: 506/509 looper letters, 45 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-04 03:04:23,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 256 flow [2023-08-04 03:04:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:04:23,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:04:23,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 929 transitions. [2023-08-04 03:04:23,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.456286836935167 [2023-08-04 03:04:23,272 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 929 transitions. [2023-08-04 03:04:23,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 929 transitions. [2023-08-04 03:04:23,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:04:23,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 929 transitions. [2023-08-04 03:04:23,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.25) internal successors, (929), 4 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:23,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 509.0) internal successors, (2545), 5 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:23,279 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 509.0) internal successors, (2545), 5 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:23,279 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 143 flow. Second operand 4 states and 929 transitions. [2023-08-04 03:04:23,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 256 flow [2023-08-04 03:04:23,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:04:23,282 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 140 flow [2023-08-04 03:04:23,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-08-04 03:04:23,284 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2023-08-04 03:04:23,284 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 140 flow [2023-08-04 03:04:23,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.0) internal successors, (1115), 5 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:23,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:04:23,285 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:04:23,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 03:04:23,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:04:23,491 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:04:23,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:04:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash 240616290, now seen corresponding path program 1 times [2023-08-04 03:04:23,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:04:23,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414558980] [2023-08-04 03:04:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:04:23,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:04:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:04:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:04:23,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:04:23,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414558980] [2023-08-04 03:04:23,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414558980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:04:23,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611176395] [2023-08-04 03:04:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:04:23,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:04:23,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:04:23,573 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) [2023-08-04 03:04:23,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 03:04:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:04:23,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:04:23,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:04:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:04:23,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:04:23,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611176395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:04:23,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:04:23,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:04:23,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962729731] [2023-08-04 03:04:23,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:04:23,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:04:23,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:04:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:04:23,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:04:23,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 509 [2023-08-04 03:04:23,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 223.0) internal successors, (1115), 5 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:23,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:04:23,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 509 [2023-08-04 03:04:23,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:04:33,992 INFO L124 PetriNetUnfolderBase]: 129091/153368 cut-off events. [2023-08-04 03:04:33,992 INFO L125 PetriNetUnfolderBase]: For 3699/3699 co-relation queries the response was YES. [2023-08-04 03:04:34,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308718 conditions, 153368 events. 129091/153368 cut-off events. For 3699/3699 co-relation queries the response was YES. Maximal size of possible extension queue 3549. Compared 684794 event pairs, 22706 based on Foata normal form. 0/99784 useless extension candidates. Maximal degree in co-relation 84691. Up to 147120 conditions per place. [2023-08-04 03:04:34,944 INFO L140 encePairwiseOnDemand]: 505/509 looper letters, 64 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-08-04 03:04:34,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 79 transitions, 336 flow [2023-08-04 03:04:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:04:34,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:04:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1169 transitions. [2023-08-04 03:04:34,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4593320235756385 [2023-08-04 03:04:34,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1169 transitions. [2023-08-04 03:04:34,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1169 transitions. [2023-08-04 03:04:34,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:04:34,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1169 transitions. [2023-08-04 03:04:34,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 233.8) internal successors, (1169), 5 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:34,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:34,956 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:34,956 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 140 flow. Second operand 5 states and 1169 transitions. [2023-08-04 03:04:34,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 79 transitions, 336 flow [2023-08-04 03:04:34,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 329 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:04:34,959 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 152 flow [2023-08-04 03:04:34,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-08-04 03:04:34,960 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2023-08-04 03:04:34,960 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 152 flow [2023-08-04 03:04:34,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.0) internal successors, (1115), 5 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:34,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:04:34,961 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:04:34,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:04:35,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:04:35,170 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:04:35,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:04:35,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1433993689, now seen corresponding path program 1 times [2023-08-04 03:04:35,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:04:35,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930810554] [2023-08-04 03:04:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:04:35,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:04:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:04:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:04:35,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:04:35,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930810554] [2023-08-04 03:04:35,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930810554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:04:35,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:04:35,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:04:35,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376222248] [2023-08-04 03:04:35,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:04:35,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:04:35,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:04:35,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:04:35,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:04:35,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 509 [2023-08-04 03:04:35,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:35,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:04:35,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 509 [2023-08-04 03:04:35,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:04:45,429 INFO L124 PetriNetUnfolderBase]: 123587/147096 cut-off events. [2023-08-04 03:04:45,430 INFO L125 PetriNetUnfolderBase]: For 4497/4497 co-relation queries the response was YES. [2023-08-04 03:04:45,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296414 conditions, 147096 events. 123587/147096 cut-off events. For 4497/4497 co-relation queries the response was YES. Maximal size of possible extension queue 3590. Compared 658605 event pairs, 62794 based on Foata normal form. 16/95943 useless extension candidates. Maximal degree in co-relation 81208. Up to 142311 conditions per place. [2023-08-04 03:04:46,513 INFO L140 encePairwiseOnDemand]: 506/509 looper letters, 48 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-04 03:04:46,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 60 transitions, 269 flow [2023-08-04 03:04:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:04:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:04:46,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 712 transitions. [2023-08-04 03:04:46,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46627373935821875 [2023-08-04 03:04:46,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 712 transitions. [2023-08-04 03:04:46,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 712 transitions. [2023-08-04 03:04:46,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:04:46,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 712 transitions. [2023-08-04 03:04:46,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:46,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 509.0) internal successors, (2036), 4 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:46,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 509.0) internal successors, (2036), 4 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:46,521 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 152 flow. Second operand 3 states and 712 transitions. [2023-08-04 03:04:46,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 60 transitions, 269 flow [2023-08-04 03:04:46,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:04:46,523 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 150 flow [2023-08-04 03:04:46,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-08-04 03:04:46,524 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2023-08-04 03:04:46,524 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 150 flow [2023-08-04 03:04:46,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:46,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:04:46,525 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:04:46,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 03:04:46,525 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:04:46,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:04:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1014699425, now seen corresponding path program 1 times [2023-08-04 03:04:46,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:04:46,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207758466] [2023-08-04 03:04:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:04:46,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:04:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:04:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:04:46,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:04:46,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207758466] [2023-08-04 03:04:46,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207758466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:04:46,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811122421] [2023-08-04 03:04:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:04:46,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:04:46,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:04:46,598 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) [2023-08-04 03:04:46,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 03:04:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:04:46,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:04:46,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:04:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:04:46,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:04:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:04:46,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811122421] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:04:46,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:04:46,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:04:46,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761519926] [2023-08-04 03:04:46,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:04:46,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:04:46,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:04:46,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:04:46,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:04:46,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 509 [2023-08-04 03:04:46,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:46,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:04:46,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 509 [2023-08-04 03:04:46,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:04:55,134 INFO L124 PetriNetUnfolderBase]: 102691/121720 cut-off events. [2023-08-04 03:04:55,134 INFO L125 PetriNetUnfolderBase]: For 3637/3637 co-relation queries the response was YES. [2023-08-04 03:04:55,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245278 conditions, 121720 events. 102691/121720 cut-off events. For 3637/3637 co-relation queries the response was YES. Maximal size of possible extension queue 3460. Compared 531469 event pairs, 39954 based on Foata normal form. 64/79319 useless extension candidates. Maximal degree in co-relation 67032. Up to 116031 conditions per place. [2023-08-04 03:04:55,912 INFO L140 encePairwiseOnDemand]: 506/509 looper letters, 58 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-08-04 03:04:55,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 313 flow [2023-08-04 03:04:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:04:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:04:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 941 transitions. [2023-08-04 03:04:55,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46218074656188607 [2023-08-04 03:04:55,915 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 941 transitions. [2023-08-04 03:04:55,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 941 transitions. [2023-08-04 03:04:55,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:04:55,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 941 transitions. [2023-08-04 03:04:55,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 235.25) internal successors, (941), 4 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:55,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 509.0) internal successors, (2545), 5 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:55,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 509.0) internal successors, (2545), 5 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:55,921 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 150 flow. Second operand 4 states and 941 transitions. [2023-08-04 03:04:55,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 313 flow [2023-08-04 03:04:55,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 309 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:04:55,924 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 147 flow [2023-08-04 03:04:55,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-08-04 03:04:55,925 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -8 predicate places. [2023-08-04 03:04:55,925 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 147 flow [2023-08-04 03:04:55,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:55,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:04:55,926 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:04:55,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 03:04:56,133 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 [2023-08-04 03:04:56,133 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:04:56,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:04:56,134 INFO L85 PathProgramCache]: Analyzing trace with hash -123747274, now seen corresponding path program 1 times [2023-08-04 03:04:56,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:04:56,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614141789] [2023-08-04 03:04:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:04:56,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:04:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:04:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:04:56,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:04:56,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614141789] [2023-08-04 03:04:56,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614141789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:04:56,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994186806] [2023-08-04 03:04:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:04:56,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:04:56,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:04:56,221 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) [2023-08-04 03:04:56,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 03:04:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:04:56,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:04:56,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:04:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:04:56,366 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:04:56,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994186806] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:04:56,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:04:56,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:04:56,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394488843] [2023-08-04 03:04:56,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:04:56,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:04:56,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:04:56,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:04:56,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:04:56,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 509 [2023-08-04 03:04:56,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:04:56,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:04:56,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 509 [2023-08-04 03:04:56,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:05:02,193 INFO L124 PetriNetUnfolderBase]: 74171/87840 cut-off events. [2023-08-04 03:05:02,193 INFO L125 PetriNetUnfolderBase]: For 3205/3205 co-relation queries the response was YES. [2023-08-04 03:05:02,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178174 conditions, 87840 events. 74171/87840 cut-off events. For 3205/3205 co-relation queries the response was YES. Maximal size of possible extension queue 2442. Compared 369465 event pairs, 2586 based on Foata normal form. 4096/60543 useless extension candidates. Maximal degree in co-relation 54261. Up to 40192 conditions per place. [2023-08-04 03:05:02,682 INFO L140 encePairwiseOnDemand]: 506/509 looper letters, 0 selfloop transitions, 0 changer transitions 95/95 dead transitions. [2023-08-04 03:05:02,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 95 transitions, 409 flow [2023-08-04 03:05:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:05:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:05:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1185 transitions. [2023-08-04 03:05:02,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656188605108055 [2023-08-04 03:05:02,686 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1185 transitions. [2023-08-04 03:05:02,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1185 transitions. [2023-08-04 03:05:02,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:05:02,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1185 transitions. [2023-08-04 03:05:02,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:05:02,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:05:02,692 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:05:02,692 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 147 flow. Second operand 5 states and 1185 transitions. [2023-08-04 03:05:02,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 95 transitions, 409 flow [2023-08-04 03:05:02,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 95 transitions, 402 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:05:02,864 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2023-08-04 03:05:02,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2023-08-04 03:05:02,865 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2023-08-04 03:05:02,865 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2023-08-04 03:05:02,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:05:02,865 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:05:02,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:05:02,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:05:02,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 03:05:03,066 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 [2023-08-04 03:05:03,067 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:05:03,067 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 03:05:03,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 276 transitions, 642 flow [2023-08-04 03:05:03,376 INFO L124 PetriNetUnfolderBase]: 895/4211 cut-off events. [2023-08-04 03:05:03,377 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:05:03,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4885 conditions, 4211 events. 895/4211 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33751 event pairs, 11 based on Foata normal form. 0/3560 useless extension candidates. Maximal degree in co-relation 2504. Up to 192 conditions per place. [2023-08-04 03:05:03,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 276 transitions, 642 flow [2023-08-04 03:05:03,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 276 transitions, 642 flow [2023-08-04 03:05:03,430 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:05:03,430 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 276 transitions, 642 flow [2023-08-04 03:05:03,430 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 276 transitions, 642 flow [2023-08-04 03:05:03,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 276 transitions, 642 flow [2023-08-04 03:05:03,808 INFO L124 PetriNetUnfolderBase]: 895/4211 cut-off events. [2023-08-04 03:05:03,808 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:05:03,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4885 conditions, 4211 events. 895/4211 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33751 event pairs, 11 based on Foata normal form. 0/3560 useless extension candidates. Maximal degree in co-relation 2504. Up to 192 conditions per place. [2023-08-04 03:05:03,903 INFO L119 LiptonReduction]: Number of co-enabled transitions 15180 [2023-08-04 03:05:10,316 INFO L134 LiptonReduction]: Checked pairs total: 38763 [2023-08-04 03:05:10,317 INFO L136 LiptonReduction]: Total number of compositions: 232 [2023-08-04 03:05:10,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:05:10,318 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;@63fcaf6b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:05:10,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:05:10,321 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:05:10,322 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-08-04 03:05:10,322 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:05:10,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:05:10,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:05:10,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:05:10,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:05:10,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1565199213, now seen corresponding path program 1 times [2023-08-04 03:05:10,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:05:10,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143024900] [2023-08-04 03:05:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:05:10,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:05:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:05:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:05:10,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:05:10,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143024900] [2023-08-04 03:05:10,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143024900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:05:10,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:05:10,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:05:10,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940978499] [2023-08-04 03:05:10,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:05:10,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:05:10,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:05:10,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:05:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:05:10,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 508 [2023-08-04 03:05:10,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:05:10,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:05:10,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 508 [2023-08-04 03:05:10,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:06:47,942 INFO L124 PetriNetUnfolderBase]: 1058318/1259052 cut-off events. [2023-08-04 03:06:47,943 INFO L125 PetriNetUnfolderBase]: For 127657/127657 co-relation queries the response was YES. [2023-08-04 03:06:52,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2551806 conditions, 1259052 events. 1058318/1259052 cut-off events. For 127657/127657 co-relation queries the response was YES. Maximal size of possible extension queue 24727. Compared 6731260 event pairs, 534271 based on Foata normal form. 0/796940 useless extension candidates. Maximal degree in co-relation 925394. Up to 1228711 conditions per place. [2023-08-04 03:06:58,416 INFO L140 encePairwiseOnDemand]: 504/508 looper letters, 68 selfloop transitions, 2 changer transitions 3/85 dead transitions. [2023-08-04 03:06:58,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 85 transitions, 400 flow [2023-08-04 03:06:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:06:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:06:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 735 transitions. [2023-08-04 03:06:58,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4822834645669291 [2023-08-04 03:06:58,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 735 transitions. [2023-08-04 03:06:58,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 735 transitions. [2023-08-04 03:06:58,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:06:58,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 735 transitions. [2023-08-04 03:06:58,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:06:58,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:06:58,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:06:58,455 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 252 flow. Second operand 3 states and 735 transitions. [2023-08-04 03:06:58,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 85 transitions, 400 flow [2023-08-04 03:06:58,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 400 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:06:58,544 INFO L231 Difference]: Finished difference. Result has 70 places, 78 transitions, 244 flow [2023-08-04 03:06:58,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=70, PETRI_TRANSITIONS=78} [2023-08-04 03:06:58,552 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 03:06:58,552 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 78 transitions, 244 flow [2023-08-04 03:06:58,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:06:58,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:06:58,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:06:58,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 03:06:58,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:06:58,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:06:58,553 INFO L85 PathProgramCache]: Analyzing trace with hash 256614711, now seen corresponding path program 1 times [2023-08-04 03:06:58,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:06:58,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235857262] [2023-08-04 03:06:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:58,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:06:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:06:58,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:06:58,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235857262] [2023-08-04 03:06:58,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235857262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:06:58,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506285726] [2023-08-04 03:06:58,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:58,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:06:58,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:06:58,657 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) [2023-08-04 03:06:58,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 03:06:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:58,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:06:58,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:06:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:06:58,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:06:58,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506285726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:06:58,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:06:58,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:06:58,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320175285] [2023-08-04 03:06:58,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:06:58,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:06:58,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:06:58,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:06:58,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:06:58,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 508 [2023-08-04 03:06:58,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 78 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:06:58,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:06:58,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 508 [2023-08-04 03:06:58,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand