/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-max-array-hom.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:38:38,112 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:38:38,188 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:38:38,196 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:38:38,197 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:38:38,197 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:38:38,198 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:38:38,226 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:38:38,226 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:38:38,231 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:38:38,231 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:38:38,231 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:38:38,233 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:38:38,234 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:38:38,234 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:38:38,234 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:38:38,234 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:38:38,235 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:38:38,235 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:38:38,235 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:38:38,235 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:38:38,236 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:38:38,236 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:38:38,236 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:38:38,236 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:38:38,237 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:38:38,237 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:38:38,237 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:38:38,238 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:38:38,238 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:38:38,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:38:38,239 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:38:38,239 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:38:38,239 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:38:38,239 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:38:38,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:38:38,239 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:38:38,240 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:38:38,240 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:38:38,240 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:38:38,240 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:38:38,240 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:38:38,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:38:38,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:38:38,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:38:38,491 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:38:38,493 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:38:38,494 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-max-array-hom.wvr_bound2.c [2023-08-03 20:38:39,607 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:38:39,780 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:38:39,780 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-max-array-hom.wvr_bound2.c [2023-08-03 20:38:39,787 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/766efd7a2/827bec1f8b144e718379bbbe750aeeba/FLAGd6c4aba5a [2023-08-03 20:38:39,798 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/766efd7a2/827bec1f8b144e718379bbbe750aeeba [2023-08-03 20:38:39,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:38:39,801 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:38:39,802 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:38:39,802 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:38:39,805 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:38:39,805 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:38:39" (1/1) ... [2023-08-03 20:38:39,806 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ed7aae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39, skipping insertion in model container [2023-08-03 20:38:39,806 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:38:39" (1/1) ... [2023-08-03 20:38:39,826 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:38:39,953 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-max-array-hom.wvr_bound2.c[2829,2842] [2023-08-03 20:38:39,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:38:39,964 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:38:39,984 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-max-array-hom.wvr_bound2.c[2829,2842] [2023-08-03 20:38:39,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:38:39,994 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:38:39,994 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:38:39,999 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:38:40,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39 WrapperNode [2023-08-03 20:38:40,000 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:38:40,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:38:40,001 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:38:40,001 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:38:40,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39" (1/1) ... [2023-08-03 20:38:40,014 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39" (1/1) ... [2023-08-03 20:38:40,035 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 153 [2023-08-03 20:38:40,035 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:38:40,036 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:38:40,036 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:38:40,036 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:38:40,044 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39" (1/1) ... [2023-08-03 20:38:40,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39" (1/1) ... [2023-08-03 20:38:40,046 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39" (1/1) ... [2023-08-03 20:38:40,046 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39" (1/1) ... [2023-08-03 20:38:40,054 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39" (1/1) ... [2023-08-03 20:38:40,058 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39" (1/1) ... [2023-08-03 20:38:40,059 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39" (1/1) ... [2023-08-03 20:38:40,060 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39" (1/1) ... [2023-08-03 20:38:40,063 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:38:40,064 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:38:40,064 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:38:40,064 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:38:40,065 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39" (1/1) ... [2023-08-03 20:38:40,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:38:40,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:38:40,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 20:38:40,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 20:38:40,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:38:40,128 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:38:40,128 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:38:40,128 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:38:40,128 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:38:40,128 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-03 20:38:40,129 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-03 20:38:40,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:38:40,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:38:40,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:38:40,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:38:40,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:38:40,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 20:38:40,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:38:40,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:38:40,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:38:40,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:38:40,132 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 20:38:40,236 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:38:40,237 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:38:40,468 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:38:40,550 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:38:40,550 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-03 20:38:40,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:38:40 BoogieIcfgContainer [2023-08-03 20:38:40,552 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:38:40,555 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:38:40,555 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:38:40,557 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:38:40,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:38:39" (1/3) ... [2023-08-03 20:38:40,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732e47bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:38:40, skipping insertion in model container [2023-08-03 20:38:40,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:38:39" (2/3) ... [2023-08-03 20:38:40,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732e47bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:38:40, skipping insertion in model container [2023-08-03 20:38:40,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:38:40" (3/3) ... [2023-08-03 20:38:40,559 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-max-array-hom.wvr_bound2.c [2023-08-03 20:38:40,566 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:38:40,575 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:38:40,575 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:38:40,576 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:38:40,665 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-03 20:38:40,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 428 flow [2023-08-03 20:38:40,893 INFO L124 PetriNetUnfolderBase]: 101/661 cut-off events. [2023-08-03 20:38:40,893 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 20:38:40,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 101/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3250 event pairs, 0 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 386. Up to 16 conditions per place. [2023-08-03 20:38:40,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 193 transitions, 428 flow [2023-08-03 20:38:40,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 193 transitions, 428 flow [2023-08-03 20:38:40,920 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:38:40,938 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 193 transitions, 428 flow [2023-08-03 20:38:40,941 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 193 transitions, 428 flow [2023-08-03 20:38:40,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 428 flow [2023-08-03 20:38:41,010 INFO L124 PetriNetUnfolderBase]: 101/661 cut-off events. [2023-08-03 20:38:41,011 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 20:38:41,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 101/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3250 event pairs, 0 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 386. Up to 16 conditions per place. [2023-08-03 20:38:41,022 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-03 20:38:46,186 INFO L134 LiptonReduction]: Checked pairs total: 8734 [2023-08-03 20:38:46,186 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-03 20:38:46,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:38:46,203 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;@bf3c336, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:38:46,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:38:46,207 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:38:46,208 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-08-03 20:38:46,208 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:38:46,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:38:46,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-03 20:38:46,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:38:46,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:38:46,212 INFO L85 PathProgramCache]: Analyzing trace with hash -244124324, now seen corresponding path program 1 times [2023-08-03 20:38:46,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:38:46,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201374543] [2023-08-03 20:38:46,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:38:46,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:38:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:38:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 20:38:46,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:38:46,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201374543] [2023-08-03 20:38:46,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201374543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:38:46,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:38:46,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:38:46,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973392371] [2023-08-03 20:38:46,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:38:46,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:38:46,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:38:46,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:38:46,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:38:46,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 361 [2023-08-03 20:38:46,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:38:46,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:38:46,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 361 [2023-08-03 20:38:46,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:38:46,974 INFO L124 PetriNetUnfolderBase]: 2307/3250 cut-off events. [2023-08-03 20:38:46,975 INFO L125 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2023-08-03 20:38:46,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6567 conditions, 3250 events. 2307/3250 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15269 event pairs, 1053 based on Foata normal form. 0/1868 useless extension candidates. Maximal degree in co-relation 5016. Up to 3086 conditions per place. [2023-08-03 20:38:46,994 INFO L140 encePairwiseOnDemand]: 357/361 looper letters, 38 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-03 20:38:46,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 220 flow [2023-08-03 20:38:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:38:46,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:38:47,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-03 20:38:47,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47645429362880887 [2023-08-03 20:38:47,015 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-03 20:38:47,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-03 20:38:47,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:38:47,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-03 20:38:47,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:38:47,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:38:47,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:38:47,033 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 140 flow. Second operand 3 states and 516 transitions. [2023-08-03 20:38:47,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 220 flow [2023-08-03 20:38:47,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:38:47,041 INFO L231 Difference]: Finished difference. Result has 45 places, 49 transitions, 150 flow [2023-08-03 20:38:47,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=49} [2023-08-03 20:38:47,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-03 20:38:47,046 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 49 transitions, 150 flow [2023-08-03 20:38:47,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:38:47,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:38:47,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-03 20:38:47,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:38:47,047 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:38:47,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:38:47,056 INFO L85 PathProgramCache]: Analyzing trace with hash -466663387, now seen corresponding path program 1 times [2023-08-03 20:38:47,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:38:47,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164495661] [2023-08-03 20:38:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:38:47,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:38:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:38:47,106 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:38:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:38:47,137 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:38:47,137 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:38:47,138 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 20:38:47,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 20:38:47,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 20:38:47,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 20:38:47,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:38:47,141 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 20:38:47,142 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:38:47,143 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:38:47,170 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-03 20:38:47,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 235 transitions, 560 flow [2023-08-03 20:38:47,693 INFO L124 PetriNetUnfolderBase]: 891/4150 cut-off events. [2023-08-03 20:38:47,693 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-03 20:38:47,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4824 conditions, 4150 events. 891/4150 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33086 event pairs, 11 based on Foata normal form. 0/3503 useless extension candidates. Maximal degree in co-relation 2464. Up to 192 conditions per place. [2023-08-03 20:38:47,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 235 transitions, 560 flow [2023-08-03 20:38:47,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 235 transitions, 560 flow [2023-08-03 20:38:47,746 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:38:47,747 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 235 transitions, 560 flow [2023-08-03 20:38:47,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 235 transitions, 560 flow [2023-08-03 20:38:47,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 235 transitions, 560 flow [2023-08-03 20:38:48,143 INFO L124 PetriNetUnfolderBase]: 891/4150 cut-off events. [2023-08-03 20:38:48,143 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-03 20:38:48,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4824 conditions, 4150 events. 891/4150 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33086 event pairs, 11 based on Foata normal form. 0/3503 useless extension candidates. Maximal degree in co-relation 2464. Up to 192 conditions per place. [2023-08-03 20:38:48,253 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-03 20:38:53,133 INFO L134 LiptonReduction]: Checked pairs total: 26775 [2023-08-03 20:38:53,133 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-03 20:38:53,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:38:53,139 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;@bf3c336, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:38:53,139 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:38:53,142 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:38:53,142 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-03 20:38:53,142 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 20:38:53,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:38:53,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:38:53,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:38:53,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:38:53,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1080106956, now seen corresponding path program 1 times [2023-08-03 20:38:53,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:38:53,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700409119] [2023-08-03 20:38:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:38:53,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:38:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:38:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:38:53,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:38:53,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700409119] [2023-08-03 20:38:53,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700409119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:38:53,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:38:53,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:38:53,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319566750] [2023-08-03 20:38:53,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:38:53,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:38:53,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:38:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:38:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:38:53,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 423 [2023-08-03 20:38:53,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:38:53,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:38:53,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 423 [2023-08-03 20:38:53,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:39:14,301 INFO L124 PetriNetUnfolderBase]: 282507/337025 cut-off events. [2023-08-03 20:39:14,301 INFO L125 PetriNetUnfolderBase]: For 35270/35270 co-relation queries the response was YES. [2023-08-03 20:39:15,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685239 conditions, 337025 events. 282507/337025 cut-off events. For 35270/35270 co-relation queries the response was YES. Maximal size of possible extension queue 6317. Compared 1590110 event pairs, 121201 based on Foata normal form. 0/188793 useless extension candidates. Maximal degree in co-relation 224661. Up to 327329 conditions per place. [2023-08-03 20:39:16,585 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 59 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-03 20:39:16,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 364 flow [2023-08-03 20:39:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:39:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:39:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-03 20:39:16,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48226950354609927 [2023-08-03 20:39:16,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-03 20:39:16,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-03 20:39:16,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:39:16,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-03 20:39:16,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:39:16,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:39:16,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:39:16,599 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 236 flow. Second operand 3 states and 612 transitions. [2023-08-03 20:39:16,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 364 flow [2023-08-03 20:39:16,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 364 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:39:16,658 INFO L231 Difference]: Finished difference. Result has 63 places, 73 transitions, 246 flow [2023-08-03 20:39:16,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=63, PETRI_TRANSITIONS=73} [2023-08-03 20:39:16,659 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-03 20:39:16,659 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 73 transitions, 246 flow [2023-08-03 20:39:16,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:39:16,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:39:16,660 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 20:39:16,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 20:39:16,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:39:16,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:39:16,661 INFO L85 PathProgramCache]: Analyzing trace with hash 551128001, now seen corresponding path program 1 times [2023-08-03 20:39:16,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:39:16,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475135323] [2023-08-03 20:39:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:39:16,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:39:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:39:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:39:16,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:39:16,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475135323] [2023-08-03 20:39:16,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475135323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:39:16,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556666377] [2023-08-03 20:39:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:39:16,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:39:16,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:39:16,746 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:39:16,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 20:39:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:39:16,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:39:16,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:39:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:39:16,905 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:39:16,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556666377] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:39:16,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:39:16,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:39:16,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322155237] [2023-08-03 20:39:16,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:39:16,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:39:16,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:39:16,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:39:16,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:39:16,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-03 20:39:16,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:39:16,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:39:16,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-03 20:39:16,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:39:36,796 INFO L124 PetriNetUnfolderBase]: 282511/337014 cut-off events. [2023-08-03 20:39:36,796 INFO L125 PetriNetUnfolderBase]: For 35285/35285 co-relation queries the response was YES. [2023-08-03 20:39:37,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685245 conditions, 337014 events. 282511/337014 cut-off events. For 35285/35285 co-relation queries the response was YES. Maximal size of possible extension queue 6317. Compared 1589467 event pairs, 98661 based on Foata normal form. 9/188802 useless extension candidates. Maximal degree in co-relation 392073. Up to 327294 conditions per place. [2023-08-03 20:39:38,956 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 62 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2023-08-03 20:39:38,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 390 flow [2023-08-03 20:39:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:39:38,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:39:38,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 977 transitions. [2023-08-03 20:39:38,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4619385342789598 [2023-08-03 20:39:38,961 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 977 transitions. [2023-08-03 20:39:38,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 977 transitions. [2023-08-03 20:39:38,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:39:38,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 977 transitions. [2023-08-03 20:39:38,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.4) internal successors, (977), 5 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:39:38,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:39:38,969 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:39:38,969 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 246 flow. Second operand 5 states and 977 transitions. [2023-08-03 20:39:38,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 390 flow [2023-08-03 20:39:39,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 380 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:39:39,003 INFO L231 Difference]: Finished difference. Result has 65 places, 73 transitions, 251 flow [2023-08-03 20:39:39,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2023-08-03 20:39:39,005 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-03 20:39:39,005 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 251 flow [2023-08-03 20:39:39,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:39:39,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:39:39,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:39:39,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 20:39:39,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:39:39,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:39:39,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:39:39,219 INFO L85 PathProgramCache]: Analyzing trace with hash -476165724, now seen corresponding path program 1 times [2023-08-03 20:39:39,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:39:39,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118853311] [2023-08-03 20:39:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:39:39,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:39:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:39:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:39:39,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:39:39,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118853311] [2023-08-03 20:39:39,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118853311] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:39:39,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:39:39,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:39:39,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616186556] [2023-08-03 20:39:39,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:39:39,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:39:39,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:39:39,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:39:39,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:39:39,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 423 [2023-08-03 20:39:39,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:39:39,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:39:39,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 423 [2023-08-03 20:39:39,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:39:58,319 INFO L124 PetriNetUnfolderBase]: 278777/332617 cut-off events. [2023-08-03 20:39:58,319 INFO L125 PetriNetUnfolderBase]: For 29367/29367 co-relation queries the response was YES. [2023-08-03 20:39:59,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673655 conditions, 332617 events. 278777/332617 cut-off events. For 29367/29367 co-relation queries the response was YES. Maximal size of possible extension queue 6540. Compared 1587339 event pairs, 119869 based on Foata normal form. 0/186401 useless extension candidates. Maximal degree in co-relation 231660. Up to 322781 conditions per place. [2023-08-03 20:40:00,342 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 64 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-03 20:40:00,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 81 transitions, 401 flow [2023-08-03 20:40:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:40:00,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:40:00,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-08-03 20:40:00,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846335697399527 [2023-08-03 20:40:00,345 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-08-03 20:40:00,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-08-03 20:40:00,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:40:00,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-08-03 20:40:00,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:00,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:00,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:00,350 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 251 flow. Second operand 3 states and 615 transitions. [2023-08-03 20:40:00,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 81 transitions, 401 flow [2023-08-03 20:40:00,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 81 transitions, 394 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:40:00,362 INFO L231 Difference]: Finished difference. Result has 66 places, 74 transitions, 259 flow [2023-08-03 20:40:00,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=66, PETRI_TRANSITIONS=74} [2023-08-03 20:40:00,363 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 5 predicate places. [2023-08-03 20:40:00,363 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 74 transitions, 259 flow [2023-08-03 20:40:00,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:00,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:40:00,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:40:00,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 20:40:00,364 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:40:00,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:40:00,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1359090681, now seen corresponding path program 1 times [2023-08-03 20:40:00,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:40:00,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560909732] [2023-08-03 20:40:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:40:00,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:40:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:40:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:40:00,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:40:00,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560909732] [2023-08-03 20:40:00,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560909732] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:40:00,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175122977] [2023-08-03 20:40:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:40:00,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:40:00,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:40:00,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:40:00,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 20:40:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:40:00,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:40:00,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:40:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 20:40:00,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:40:00,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175122977] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:40:00,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:40:00,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:40:00,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624353332] [2023-08-03 20:40:00,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:40:00,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:40:00,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:40:00,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:40:00,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:40:00,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 423 [2023-08-03 20:40:00,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 74 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:00,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:40:00,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 423 [2023-08-03 20:40:00,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:40:22,450 INFO L124 PetriNetUnfolderBase]: 278153/334081 cut-off events. [2023-08-03 20:40:22,450 INFO L125 PetriNetUnfolderBase]: For 23739/23739 co-relation queries the response was YES. [2023-08-03 20:40:23,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674690 conditions, 334081 events. 278153/334081 cut-off events. For 23739/23739 co-relation queries the response was YES. Maximal size of possible extension queue 7103. Compared 1670657 event pairs, 118825 based on Foata normal form. 0/188393 useless extension candidates. Maximal degree in co-relation 232257. Up to 318849 conditions per place. [2023-08-03 20:40:24,797 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 70 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-03 20:40:24,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 86 transitions, 427 flow [2023-08-03 20:40:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:40:24,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:40:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2023-08-03 20:40:24,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48778565799842394 [2023-08-03 20:40:24,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2023-08-03 20:40:24,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2023-08-03 20:40:24,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:40:24,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2023-08-03 20:40:24,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:24,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:24,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:24,804 INFO L175 Difference]: Start difference. First operand has 66 places, 74 transitions, 259 flow. Second operand 3 states and 619 transitions. [2023-08-03 20:40:24,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 86 transitions, 427 flow [2023-08-03 20:40:24,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 424 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:40:24,816 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 268 flow [2023-08-03 20:40:24,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2023-08-03 20:40:24,817 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2023-08-03 20:40:24,817 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 268 flow [2023-08-03 20:40:24,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:24,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:40:24,818 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:40:24,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 20:40:25,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-03 20:40:25,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:40:25,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:40:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash 272464353, now seen corresponding path program 1 times [2023-08-03 20:40:25,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:40:25,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982566189] [2023-08-03 20:40:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:40:25,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:40:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:40:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:40:25,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:40:25,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982566189] [2023-08-03 20:40:25,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982566189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:40:25,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007046402] [2023-08-03 20:40:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:40:25,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:40:25,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:40:25,077 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:40:25,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 20:40:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:40:25,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:40:25,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:40:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:40:25,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:40:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:40:25,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007046402] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:40:25,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:40:25,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:40:25,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240909003] [2023-08-03 20:40:25,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:40:25,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:40:25,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:40:25,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:40:25,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:40:25,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-03 20:40:25,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:25,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:40:25,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-03 20:40:25,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:40:44,464 INFO L124 PetriNetUnfolderBase]: 270979/325098 cut-off events. [2023-08-03 20:40:44,464 INFO L125 PetriNetUnfolderBase]: For 22410/22410 co-relation queries the response was YES. [2023-08-03 20:40:45,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659098 conditions, 325098 events. 270979/325098 cut-off events. For 22410/22410 co-relation queries the response was YES. Maximal size of possible extension queue 7112. Compared 1619773 event pairs, 95892 based on Foata normal form. 3/184668 useless extension candidates. Maximal degree in co-relation 186197. Up to 313776 conditions per place. [2023-08-03 20:40:46,722 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 64 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-03 20:40:46,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 81 transitions, 410 flow [2023-08-03 20:40:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:40:46,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:40:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 794 transitions. [2023-08-03 20:40:46,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46926713947990545 [2023-08-03 20:40:46,724 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 794 transitions. [2023-08-03 20:40:46,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 794 transitions. [2023-08-03 20:40:46,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:40:46,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 794 transitions. [2023-08-03 20:40:46,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:46,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:46,730 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:46,730 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 268 flow. Second operand 4 states and 794 transitions. [2023-08-03 20:40:46,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 81 transitions, 410 flow [2023-08-03 20:40:46,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 408 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:40:46,746 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 264 flow [2023-08-03 20:40:46,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2023-08-03 20:40:46,747 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2023-08-03 20:40:46,747 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 264 flow [2023-08-03 20:40:46,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:46,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:40:46,748 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:40:46,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 20:40:46,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:40:46,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:40:46,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:40:46,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2070696792, now seen corresponding path program 1 times [2023-08-03 20:40:46,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:40:46,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252739493] [2023-08-03 20:40:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:40:46,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:40:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:40:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:40:47,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:40:47,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252739493] [2023-08-03 20:40:47,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252739493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:40:47,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907861563] [2023-08-03 20:40:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:40:47,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:40:47,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:40:47,033 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:40:47,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 20:40:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:40:47,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:40:47,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:40:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:40:47,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:40:47,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907861563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:40:47,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:40:47,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:40:47,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733626204] [2023-08-03 20:40:47,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:40:47,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:40:47,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:40:47,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:40:47,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:40:47,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-03 20:40:47,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 264 flow. Second operand has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:40:47,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:40:47,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-03 20:40:47,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:41:06,118 INFO L124 PetriNetUnfolderBase]: 270169/324234 cut-off events. [2023-08-03 20:41:06,118 INFO L125 PetriNetUnfolderBase]: For 21813/21813 co-relation queries the response was YES. [2023-08-03 20:41:07,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656920 conditions, 324234 events. 270169/324234 cut-off events. For 21813/21813 co-relation queries the response was YES. Maximal size of possible extension queue 7090. Compared 1611528 event pairs, 52836 based on Foata normal form. 81/184287 useless extension candidates. Maximal degree in co-relation 286006. Up to 312099 conditions per place. [2023-08-03 20:41:08,382 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 76 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2023-08-03 20:41:08,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 462 flow [2023-08-03 20:41:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:41:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:41:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 989 transitions. [2023-08-03 20:41:08,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46761229314420805 [2023-08-03 20:41:08,385 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 989 transitions. [2023-08-03 20:41:08,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 989 transitions. [2023-08-03 20:41:08,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:41:08,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 989 transitions. [2023-08-03 20:41:08,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.8) internal successors, (989), 5 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:08,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:08,391 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:08,391 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 264 flow. Second operand 5 states and 989 transitions. [2023-08-03 20:41:08,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 462 flow [2023-08-03 20:41:08,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 93 transitions, 448 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:41:08,413 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 267 flow [2023-08-03 20:41:08,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2023-08-03 20:41:08,414 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2023-08-03 20:41:08,414 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 267 flow [2023-08-03 20:41:08,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:08,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:41:08,415 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:41:08,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 20:41:08,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:41:08,621 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:41:08,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:41:08,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1835928578, now seen corresponding path program 1 times [2023-08-03 20:41:08,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:41:08,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601678529] [2023-08-03 20:41:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:41:08,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:41:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:41:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 20:41:08,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:41:08,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601678529] [2023-08-03 20:41:08,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601678529] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:41:08,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699091980] [2023-08-03 20:41:08,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:41:08,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:41:08,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:41:08,673 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:41:08,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 20:41:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:41:08,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:41:08,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:41:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:41:08,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:41:08,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699091980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:41:08,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:41:08,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:41:08,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726360839] [2023-08-03 20:41:08,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:41:08,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:41:08,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:41:08,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:41:08,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:41:08,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 423 [2023-08-03 20:41:08,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:08,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:41:08,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 423 [2023-08-03 20:41:08,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:41:27,268 INFO L124 PetriNetUnfolderBase]: 230668/278064 cut-off events. [2023-08-03 20:41:27,268 INFO L125 PetriNetUnfolderBase]: For 14453/14453 co-relation queries the response was YES. [2023-08-03 20:41:28,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562562 conditions, 278064 events. 230668/278064 cut-off events. For 14453/14453 co-relation queries the response was YES. Maximal size of possible extension queue 6404. Compared 1395811 event pairs, 92028 based on Foata normal form. 0/158691 useless extension candidates. Maximal degree in co-relation 253648. Up to 230759 conditions per place. [2023-08-03 20:41:29,218 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 79 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-03 20:41:29,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 483 flow [2023-08-03 20:41:29,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:41:29,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:41:29,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-03 20:41:29,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4940898345153664 [2023-08-03 20:41:29,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-03 20:41:29,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-03 20:41:29,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:41:29,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-03 20:41:29,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:29,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:29,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:29,224 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 267 flow. Second operand 3 states and 627 transitions. [2023-08-03 20:41:29,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 483 flow [2023-08-03 20:41:29,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 476 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:41:29,240 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 272 flow [2023-08-03 20:41:29,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-08-03 20:41:29,241 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-03 20:41:29,241 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 272 flow [2023-08-03 20:41:29,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:29,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:41:29,242 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:41:29,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 20:41:29,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:41:29,446 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:41:29,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:41:29,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2054806421, now seen corresponding path program 1 times [2023-08-03 20:41:29,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:41:29,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013634052] [2023-08-03 20:41:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:41:29,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:41:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:41:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:41:29,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:41:29,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013634052] [2023-08-03 20:41:29,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013634052] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:41:29,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829361888] [2023-08-03 20:41:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:41:29,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:41:29,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:41:29,504 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:41:29,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 20:41:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:41:29,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:41:29,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:41:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:41:29,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:41:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:41:29,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829361888] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:41:29,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:41:29,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:41:29,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689717402] [2023-08-03 20:41:29,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:41:29,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:41:29,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:41:29,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:41:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:41:29,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-03 20:41:29,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 185.8) internal successors, (929), 5 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) [2023-08-03 20:41:29,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:41:29,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-03 20:41:29,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:41:46,479 INFO L124 PetriNetUnfolderBase]: 218491/263160 cut-off events. [2023-08-03 20:41:46,479 INFO L125 PetriNetUnfolderBase]: For 21336/21336 co-relation queries the response was YES. [2023-08-03 20:41:47,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541883 conditions, 263160 events. 218491/263160 cut-off events. For 21336/21336 co-relation queries the response was YES. Maximal size of possible extension queue 6440. Compared 1319525 event pairs, 78674 based on Foata normal form. 27/153121 useless extension candidates. Maximal degree in co-relation 248918. Up to 253901 conditions per place. [2023-08-03 20:41:48,473 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 73 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-08-03 20:41:48,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 448 flow [2023-08-03 20:41:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:41:48,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:41:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 802 transitions. [2023-08-03 20:41:48,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4739952718676123 [2023-08-03 20:41:48,475 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 802 transitions. [2023-08-03 20:41:48,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 802 transitions. [2023-08-03 20:41:48,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:41:48,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 802 transitions. [2023-08-03 20:41:48,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:48,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:48,479 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:41:48,479 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 272 flow. Second operand 4 states and 802 transitions. [2023-08-03 20:41:48,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 448 flow [2023-08-03 20:41:48,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:41:48,561 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 268 flow [2023-08-03 20:41:48,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2023-08-03 20:41:48,562 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 12 predicate places. [2023-08-03 20:41:48,562 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 268 flow [2023-08-03 20:41:48,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 185.8) internal successors, (929), 5 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) [2023-08-03 20:41:48,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:41:48,563 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] [2023-08-03 20:41:48,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 20:41:48,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:41:48,764 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:41:48,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:41:48,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1631704265, now seen corresponding path program 1 times [2023-08-03 20:41:48,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:41:48,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900405620] [2023-08-03 20:41:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:41:48,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:41:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:41:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 20:41:48,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:41:48,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900405620] [2023-08-03 20:41:48,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900405620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:41:48,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621788747] [2023-08-03 20:41:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:41:48,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:41:48,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:41:48,823 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:41:48,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 20:41:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:41:48,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:41:48,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:41:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 20:41:48,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:41:48,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621788747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:41:48,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:41:48,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:41:48,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338864969] [2023-08-03 20:41:48,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:41:48,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:41:48,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:41:48,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:41:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:41:48,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-03 20:41:48,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 185.8) internal successors, (929), 5 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) [2023-08-03 20:41:48,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:41:48,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-03 20:41:48,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:42:04,835 INFO L124 PetriNetUnfolderBase]: 212659/256356 cut-off events. [2023-08-03 20:42:04,835 INFO L125 PetriNetUnfolderBase]: For 17118/17118 co-relation queries the response was YES. [2023-08-03 20:42:05,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526250 conditions, 256356 events. 212659/256356 cut-off events. For 17118/17118 co-relation queries the response was YES. Maximal size of possible extension queue 6429. Compared 1282905 event pairs, 10590 based on Foata normal form. 729/149935 useless extension candidates. Maximal degree in co-relation 244139. Up to 237039 conditions per place. [2023-08-03 20:42:06,561 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 89 selfloop transitions, 4 changer transitions 0/105 dead transitions. [2023-08-03 20:42:06,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 105 transitions, 516 flow [2023-08-03 20:42:06,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:42:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:42:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1001 transitions. [2023-08-03 20:42:06,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732860520094563 [2023-08-03 20:42:06,564 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1001 transitions. [2023-08-03 20:42:06,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1001 transitions. [2023-08-03 20:42:06,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:42:06,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1001 transitions. [2023-08-03 20:42:06,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.2) internal successors, (1001), 5 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:06,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:06,569 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:06,569 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 268 flow. Second operand 5 states and 1001 transitions. [2023-08-03 20:42:06,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 105 transitions, 516 flow [2023-08-03 20:42:06,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 502 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:42:06,703 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 271 flow [2023-08-03 20:42:06,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2023-08-03 20:42:06,704 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 12 predicate places. [2023-08-03 20:42:06,704 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 271 flow [2023-08-03 20:42:06,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 185.8) internal successors, (929), 5 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) [2023-08-03 20:42:06,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:42:06,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:42:06,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 20:42:06,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:42:06,911 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:42:06,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:42:06,911 INFO L85 PathProgramCache]: Analyzing trace with hash 259298503, now seen corresponding path program 1 times [2023-08-03 20:42:06,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:42:06,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323092676] [2023-08-03 20:42:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:42:06,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:42:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:42:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:42:06,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:42:06,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323092676] [2023-08-03 20:42:06,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323092676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:42:06,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411489106] [2023-08-03 20:42:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:42:06,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:42:06,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:42:06,968 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:42:06,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 20:42:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:42:07,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:42:07,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:42:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:42:07,261 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:42:07,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411489106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:42:07,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:42:07,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:42:07,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114785987] [2023-08-03 20:42:07,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:42:07,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:42:07,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:42:07,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:42:07,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:42:07,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 423 [2023-08-03 20:42:07,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:07,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:42:07,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 423 [2023-08-03 20:42:07,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:42:22,470 INFO L124 PetriNetUnfolderBase]: 195528/237627 cut-off events. [2023-08-03 20:42:22,470 INFO L125 PetriNetUnfolderBase]: For 20544/20544 co-relation queries the response was YES. [2023-08-03 20:42:23,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489071 conditions, 237627 events. 195528/237627 cut-off events. For 20544/20544 co-relation queries the response was YES. Maximal size of possible extension queue 5066. Compared 1213327 event pairs, 71309 based on Foata normal form. 0/140917 useless extension candidates. Maximal degree in co-relation 235371. Up to 171899 conditions per place. [2023-08-03 20:42:24,015 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 80 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-03 20:42:24,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 94 transitions, 487 flow [2023-08-03 20:42:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:42:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:42:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-03 20:42:24,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4940898345153664 [2023-08-03 20:42:24,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-03 20:42:24,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-03 20:42:24,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:42:24,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-03 20:42:24,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:24,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:24,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:24,021 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 271 flow. Second operand 3 states and 627 transitions. [2023-08-03 20:42:24,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 94 transitions, 487 flow [2023-08-03 20:42:24,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 480 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:42:24,118 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 276 flow [2023-08-03 20:42:24,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-08-03 20:42:24,119 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 13 predicate places. [2023-08-03 20:42:24,119 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 276 flow [2023-08-03 20:42:24,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:24,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:42:24,120 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:42:24,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-03 20:42:24,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-03 20:42:24,321 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:42:24,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:42:24,321 INFO L85 PathProgramCache]: Analyzing trace with hash -971725716, now seen corresponding path program 1 times [2023-08-03 20:42:24,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:42:24,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894194985] [2023-08-03 20:42:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:42:24,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:42:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:42:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:42:24,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:42:24,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894194985] [2023-08-03 20:42:24,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894194985] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:42:24,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540344607] [2023-08-03 20:42:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:42:24,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:42:24,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:42:24,370 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:42:24,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 20:42:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:42:24,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:42:24,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:42:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:42:24,474 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:42:24,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540344607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:42:24,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:42:24,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 20:42:24,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936658535] [2023-08-03 20:42:24,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:42:24,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:42:24,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:42:24,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:42:24,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:42:24,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 423 [2023-08-03 20:42:24,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:24,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:42:24,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 423 [2023-08-03 20:42:24,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:42:41,619 INFO L124 PetriNetUnfolderBase]: 194462/237042 cut-off events. [2023-08-03 20:42:41,619 INFO L125 PetriNetUnfolderBase]: For 24537/24537 co-relation queries the response was YES. [2023-08-03 20:42:42,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497044 conditions, 237042 events. 194462/237042 cut-off events. For 24537/24537 co-relation queries the response was YES. Maximal size of possible extension queue 4793. Compared 1218180 event pairs, 84459 based on Foata normal form. 0/143960 useless extension candidates. Maximal degree in co-relation 242597. Up to 202426 conditions per place. [2023-08-03 20:42:43,195 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 81 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-03 20:42:43,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 494 flow [2023-08-03 20:42:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:42:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:42:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-03 20:42:43,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4940898345153664 [2023-08-03 20:42:43,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-03 20:42:43,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-03 20:42:43,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:42:43,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-03 20:42:43,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:43,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:43,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:43,201 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 276 flow. Second operand 3 states and 627 transitions. [2023-08-03 20:42:43,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 494 flow [2023-08-03 20:42:47,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 95 transitions, 492 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:42:47,711 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 286 flow [2023-08-03 20:42:47,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2023-08-03 20:42:47,711 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 15 predicate places. [2023-08-03 20:42:47,711 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 286 flow [2023-08-03 20:42:47,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:47,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:42:47,712 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:42:47,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 20:42:47,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 20:42:47,916 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:42:47,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:42:47,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1565281416, now seen corresponding path program 1 times [2023-08-03 20:42:47,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:42:47,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737923873] [2023-08-03 20:42:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:42:47,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:42:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:42:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:42:47,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:42:47,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737923873] [2023-08-03 20:42:47,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737923873] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:42:47,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217121849] [2023-08-03 20:42:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:42:47,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:42:47,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:42:47,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:42:47,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 20:42:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:42:48,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:42:48,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:42:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:42:48,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:42:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:42:48,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217121849] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:42:48,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:42:48,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:42:48,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268827767] [2023-08-03 20:42:48,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:42:48,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:42:48,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:42:48,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:42:48,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:42:48,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-03 20:42:48,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:42:48,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:42:48,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-03 20:42:48,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:43:03,675 INFO L124 PetriNetUnfolderBase]: 188657/229941 cut-off events. [2023-08-03 20:43:03,676 INFO L125 PetriNetUnfolderBase]: For 22064/22064 co-relation queries the response was YES. [2023-08-03 20:43:04,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484107 conditions, 229941 events. 188657/229941 cut-off events. For 22064/22064 co-relation queries the response was YES. Maximal size of possible extension queue 5054. Compared 1202399 event pairs, 67625 based on Foata normal form. 243/140496 useless extension candidates. Maximal degree in co-relation 400633. Up to 212649 conditions per place. [2023-08-03 20:43:05,284 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 83 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-08-03 20:43:05,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 98 transitions, 498 flow [2023-08-03 20:43:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:43:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:43:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 810 transitions. [2023-08-03 20:43:05,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4787234042553192 [2023-08-03 20:43:05,287 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 810 transitions. [2023-08-03 20:43:05,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 810 transitions. [2023-08-03 20:43:05,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:43:05,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 810 transitions. [2023-08-03 20:43:05,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.5) internal successors, (810), 4 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:05,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:05,291 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:05,291 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 286 flow. Second operand 4 states and 810 transitions. [2023-08-03 20:43:05,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 98 transitions, 498 flow [2023-08-03 20:43:10,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 98 transitions, 496 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:43:10,274 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 282 flow [2023-08-03 20:43:10,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2023-08-03 20:43:10,274 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 17 predicate places. [2023-08-03 20:43:10,274 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 282 flow [2023-08-03 20:43:10,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:10,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:43:10,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:43:10,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 20:43:10,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-03 20:43:10,476 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:43:10,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:43:10,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1556580285, now seen corresponding path program 1 times [2023-08-03 20:43:10,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:43:10,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190540407] [2023-08-03 20:43:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:43:10,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:43:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:43:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:43:10,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:43:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190540407] [2023-08-03 20:43:10,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190540407] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:43:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124482853] [2023-08-03 20:43:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:43:10,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:43:10,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:43:10,532 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:43:10,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 20:43:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:43:10,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:43:10,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:43:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:43:10,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:43:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:43:10,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124482853] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:43:10,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:43:10,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:43:10,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703566531] [2023-08-03 20:43:10,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:43:10,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:43:10,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:43:10,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:43:10,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:43:10,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-03 20:43:10,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 189.2) internal successors, (946), 5 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:10,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:43:10,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-03 20:43:10,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:43:19,366 INFO L124 PetriNetUnfolderBase]: 121202/148230 cut-off events. [2023-08-03 20:43:19,366 INFO L125 PetriNetUnfolderBase]: For 17401/17401 co-relation queries the response was YES. [2023-08-03 20:43:20,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311729 conditions, 148230 events. 121202/148230 cut-off events. For 17401/17401 co-relation queries the response was YES. Maximal size of possible extension queue 2635. Compared 720253 event pairs, 29065 based on Foata normal form. 1458/91500 useless extension candidates. Maximal degree in co-relation 290959. Up to 71816 conditions per place. [2023-08-03 20:43:20,888 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 91 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-08-03 20:43:20,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 107 transitions, 548 flow [2023-08-03 20:43:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:43:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:43:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 819 transitions. [2023-08-03 20:43:20,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48404255319148937 [2023-08-03 20:43:20,891 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 819 transitions. [2023-08-03 20:43:20,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 819 transitions. [2023-08-03 20:43:20,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:43:20,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 819 transitions. [2023-08-03 20:43:20,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.75) internal successors, (819), 4 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:20,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:20,895 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:43:20,896 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 282 flow. Second operand 4 states and 819 transitions. [2023-08-03 20:43:20,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 107 transitions, 548 flow