/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/pthread-wmm_safe024_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 18:42:50,397 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 18:42:50,464 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 18:42:50,470 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 18:42:50,470 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 18:42:50,471 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 18:42:50,471 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 18:42:50,506 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 18:42:50,506 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 18:42:50,510 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 18:42:50,511 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 18:42:50,511 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 18:42:50,511 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 18:42:50,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 18:42:50,513 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 18:42:50,513 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 18:42:50,513 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 18:42:50,513 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 18:42:50,514 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 18:42:50,514 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 18:42:50,514 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 18:42:50,517 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 18:42:50,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 18:42:50,517 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 18:42:50,518 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 18:42:50,519 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 18:42:50,519 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 18:42:50,519 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 18:42:50,519 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 18:42:50,520 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 18:42:50,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:42:50,521 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 18:42:50,521 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 18:42:50,521 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 18:42:50,521 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 18:42:50,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 18:42:50,521 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 18:42:50,522 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 18:42:50,522 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 18:42:50,522 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 18:42:50,522 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 18:42:50,522 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 18:42:50,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 18:42:50,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 18:42:50,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 18:42:50,815 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 18:42:50,815 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 18:42:50,816 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe024_tso_bound2.i [2023-08-03 18:42:51,950 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 18:42:52,177 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 18:42:52,177 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe024_tso_bound2.i [2023-08-03 18:42:52,190 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf69524d8/0f9316edfe764a96b7f5a52dddbf9da7/FLAGce663a904 [2023-08-03 18:42:52,203 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf69524d8/0f9316edfe764a96b7f5a52dddbf9da7 [2023-08-03 18:42:52,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 18:42:52,206 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 18:42:52,207 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 18:42:52,207 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 18:42:52,210 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 18:42:52,211 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:42:52" (1/1) ... [2023-08-03 18:42:52,212 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4055f74b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52, skipping insertion in model container [2023-08-03 18:42:52,212 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:42:52" (1/1) ... [2023-08-03 18:42:52,249 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 18:42:52,380 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe024_tso_bound2.i[945,958] [2023-08-03 18:42:52,505 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:42:52,516 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 18:42:52,528 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe024_tso_bound2.i[945,958] [2023-08-03 18:42:52,537 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 18:42:52,539 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 18:42:52,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:42:52,591 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:42:52,591 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:42:52,597 INFO L206 MainTranslator]: Completed translation [2023-08-03 18:42:52,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52 WrapperNode [2023-08-03 18:42:52,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 18:42:52,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 18:42:52,599 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 18:42:52,599 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 18:42:52,606 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52" (1/1) ... [2023-08-03 18:42:52,631 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52" (1/1) ... [2023-08-03 18:42:52,656 INFO L138 Inliner]: procedures = 176, calls = 55, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2023-08-03 18:42:52,656 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 18:42:52,657 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 18:42:52,657 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 18:42:52,657 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 18:42:52,664 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52" (1/1) ... [2023-08-03 18:42:52,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52" (1/1) ... [2023-08-03 18:42:52,682 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52" (1/1) ... [2023-08-03 18:42:52,682 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52" (1/1) ... [2023-08-03 18:42:52,688 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52" (1/1) ... [2023-08-03 18:42:52,690 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52" (1/1) ... [2023-08-03 18:42:52,692 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52" (1/1) ... [2023-08-03 18:42:52,693 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52" (1/1) ... [2023-08-03 18:42:52,696 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 18:42:52,696 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 18:42:52,697 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 18:42:52,697 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 18:42:52,697 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52" (1/1) ... [2023-08-03 18:42:52,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:42:52,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:42:52,735 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 18:42:52,761 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 18:42:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 18:42:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 18:42:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 18:42:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 18:42:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 18:42:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 18:42:52,776 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 18:42:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 18:42:52,777 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 18:42:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 18:42:52,777 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 18:42:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 18:42:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 18:42:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 18:42:52,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 18:42:52,779 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 18:42:52,927 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 18:42:52,929 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 18:42:53,152 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 18:42:53,159 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 18:42:53,160 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 18:42:53,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:42:53 BoogieIcfgContainer [2023-08-03 18:42:53,162 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 18:42:53,164 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 18:42:53,164 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 18:42:53,171 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 18:42:53,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 06:42:52" (1/3) ... [2023-08-03 18:42:53,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49209fcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:42:53, skipping insertion in model container [2023-08-03 18:42:53,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:42:52" (2/3) ... [2023-08-03 18:42:53,173 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49209fcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:42:53, skipping insertion in model container [2023-08-03 18:42:53,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:42:53" (3/3) ... [2023-08-03 18:42:53,174 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe024_tso_bound2.i [2023-08-03 18:42:53,182 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 18:42:53,191 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 18:42:53,191 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 18:42:53,191 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 18:42:53,297 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:42:53,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 107 transitions, 229 flow [2023-08-03 18:42:53,458 INFO L124 PetriNetUnfolderBase]: 30/415 cut-off events. [2023-08-03 18:42:53,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:42:53,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 415 events. 30/415 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1846 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 244. Up to 16 conditions per place. [2023-08-03 18:42:53,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 107 transitions, 229 flow [2023-08-03 18:42:53,471 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 95 transitions, 205 flow [2023-08-03 18:42:53,474 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:42:53,482 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 95 transitions, 205 flow [2023-08-03 18:42:53,485 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 95 transitions, 205 flow [2023-08-03 18:42:53,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 95 transitions, 205 flow [2023-08-03 18:42:53,529 INFO L124 PetriNetUnfolderBase]: 22/319 cut-off events. [2023-08-03 18:42:53,529 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:42:53,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 319 events. 22/319 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1292 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 196. Up to 16 conditions per place. [2023-08-03 18:42:53,533 INFO L119 LiptonReduction]: Number of co-enabled transitions 1692 [2023-08-03 18:42:55,413 INFO L134 LiptonReduction]: Checked pairs total: 3158 [2023-08-03 18:42:55,413 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-08-03 18:42:55,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:42:55,430 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;@7bb17274, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:42:55,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:42:55,434 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:42:55,434 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-03 18:42:55,434 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:42:55,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:42:55,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 18:42:55,435 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 18:42:55,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:42:55,439 INFO L85 PathProgramCache]: Analyzing trace with hash 356510974, now seen corresponding path program 1 times [2023-08-03 18:42:55,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:42:55,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149055653] [2023-08-03 18:42:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:42:55,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:42:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:42:55,700 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 18:42:55,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:42:55,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149055653] [2023-08-03 18:42:55,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149055653] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:42:55,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:42:55,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:42:55,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55269591] [2023-08-03 18:42:55,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:42:55,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:42:55,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:42:55,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:42:55,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:42:55,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 182 [2023-08-03 18:42:55,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:42:55,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:42:55,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 182 [2023-08-03 18:42:55,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:42:55,884 INFO L124 PetriNetUnfolderBase]: 400/744 cut-off events. [2023-08-03 18:42:55,885 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-03 18:42:55,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1494 conditions, 744 events. 400/744 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3958 event pairs, 310 based on Foata normal form. 0/663 useless extension candidates. Maximal degree in co-relation 1477. Up to 668 conditions per place. [2023-08-03 18:42:55,892 INFO L140 encePairwiseOnDemand]: 178/182 looper letters, 21 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-03 18:42:55,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 119 flow [2023-08-03 18:42:55,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:42:55,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:42:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-03 18:42:55,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622710622710623 [2023-08-03 18:42:55,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-03 18:42:55,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-03 18:42:55,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:42:55,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-03 18:42:55,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 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 18:42:55,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 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 18:42:55,929 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 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 18:42:55,931 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 69 flow. Second operand 3 states and 307 transitions. [2023-08-03 18:42:55,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 119 flow [2023-08-03 18:42:55,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 18:42:55,935 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 75 flow [2023-08-03 18:42:55,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-03 18:42:55,942 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-03 18:42:55,942 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 75 flow [2023-08-03 18:42:55,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:42:55,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:42:55,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 18:42:55,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 18:42:55,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === 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 18:42:55,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:42:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1837738056, now seen corresponding path program 1 times [2023-08-03 18:42:55,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:42:55,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586168481] [2023-08-03 18:42:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:42:55,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:42:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:42:55,984 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 18:42:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:42:56,020 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 18:42:56,021 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 18:42:56,022 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 18:42:56,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 18:42:56,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 18:42:56,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 18:42:56,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 18:42:56,025 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 18:42:56,029 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 18:42:56,029 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 18:42:56,066 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:42:56,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 128 transitions, 292 flow [2023-08-03 18:42:56,219 INFO L124 PetriNetUnfolderBase]: 93/1305 cut-off events. [2023-08-03 18:42:56,220 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:42:56,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 1305 events. 93/1305 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8924 event pairs, 0 based on Foata normal form. 0/1146 useless extension candidates. Maximal degree in co-relation 946. Up to 54 conditions per place. [2023-08-03 18:42:56,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 128 transitions, 292 flow [2023-08-03 18:42:56,231 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 116 transitions, 268 flow [2023-08-03 18:42:56,232 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:42:56,232 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 116 transitions, 268 flow [2023-08-03 18:42:56,232 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 116 transitions, 268 flow [2023-08-03 18:42:56,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 116 transitions, 268 flow [2023-08-03 18:42:56,336 INFO L124 PetriNetUnfolderBase]: 66/981 cut-off events. [2023-08-03 18:42:56,336 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:42:56,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 981 events. 66/981 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6131 event pairs, 0 based on Foata normal form. 0/876 useless extension candidates. Maximal degree in co-relation 730. Up to 54 conditions per place. [2023-08-03 18:42:56,352 INFO L119 LiptonReduction]: Number of co-enabled transitions 4140 [2023-08-03 18:42:58,042 INFO L134 LiptonReduction]: Checked pairs total: 8782 [2023-08-03 18:42:58,042 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-03 18:42:58,044 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:42:58,045 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;@7bb17274, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:42:58,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:42:58,047 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:42:58,047 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-03 18:42:58,047 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:42:58,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:42:58,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 18:42:58,048 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 18:42:58,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:42:58,048 INFO L85 PathProgramCache]: Analyzing trace with hash 577015013, now seen corresponding path program 1 times [2023-08-03 18:42:58,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:42:58,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057360529] [2023-08-03 18:42:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:42:58,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:42:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:42:58,091 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 18:42:58,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:42:58,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057360529] [2023-08-03 18:42:58,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057360529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:42:58,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:42:58,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:42:58,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780376701] [2023-08-03 18:42:58,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:42:58,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:42:58,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:42:58,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:42:58,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:42:58,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 209 [2023-08-03 18:42:58,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 18:42:58,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:42:58,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 209 [2023-08-03 18:42:58,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:43:01,922 INFO L124 PetriNetUnfolderBase]: 33046/48278 cut-off events. [2023-08-03 18:43:01,923 INFO L125 PetriNetUnfolderBase]: For 1932/1932 co-relation queries the response was YES. [2023-08-03 18:43:02,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94683 conditions, 48278 events. 33046/48278 cut-off events. For 1932/1932 co-relation queries the response was YES. Maximal size of possible extension queue 1661. Compared 344783 event pairs, 26064 based on Foata normal form. 0/45857 useless extension candidates. Maximal degree in co-relation 26900. Up to 43520 conditions per place. [2023-08-03 18:43:02,400 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 31 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-03 18:43:02,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 192 flow [2023-08-03 18:43:02,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:43:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:43:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-03 18:43:02,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5901116427432217 [2023-08-03 18:43:02,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-03 18:43:02,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-03 18:43:02,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:43:02,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-03 18:43:02,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 18:43:02,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 18:43:02,406 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 18:43:02,406 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 118 flow. Second operand 3 states and 370 transitions. [2023-08-03 18:43:02,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 192 flow [2023-08-03 18:43:02,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 45 transitions, 186 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 18:43:02,413 INFO L231 Difference]: Finished difference. Result has 57 places, 42 transitions, 124 flow [2023-08-03 18:43:02,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=42} [2023-08-03 18:43:02,414 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-03 18:43:02,414 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 42 transitions, 124 flow [2023-08-03 18:43:02,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 18:43:02,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:43:02,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:43:02,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 18:43:02,415 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:43:02,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:43:02,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1485708169, now seen corresponding path program 1 times [2023-08-03 18:43:02,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:43:02,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121684417] [2023-08-03 18:43:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:02,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:43:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:43:02,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:43:02,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121684417] [2023-08-03 18:43:02,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121684417] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:43:02,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202872216] [2023-08-03 18:43:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:02,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:02,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:43:02,514 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 18:43:02,542 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 18:43:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:02,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:43:02,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:43:02,625 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 18:43:02,625 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:43:02,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202872216] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:43:02,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:43:02,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:43:02,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321006597] [2023-08-03 18:43:02,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:43:02,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:43:02,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:43:02,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:43:02,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:43:02,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 209 [2023-08-03 18:43:02,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:43:02,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:43:02,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 209 [2023-08-03 18:43:02,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:43:05,291 INFO L124 PetriNetUnfolderBase]: 31406/45344 cut-off events. [2023-08-03 18:43:05,292 INFO L125 PetriNetUnfolderBase]: For 1143/1143 co-relation queries the response was YES. [2023-08-03 18:43:05,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88696 conditions, 45344 events. 31406/45344 cut-off events. For 1143/1143 co-relation queries the response was YES. Maximal size of possible extension queue 1628. Compared 317120 event pairs, 24928 based on Foata normal form. 0/43112 useless extension candidates. Maximal degree in co-relation 88659. Up to 40987 conditions per place. [2023-08-03 18:43:05,585 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 36 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-03 18:43:05,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 216 flow [2023-08-03 18:43:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:43:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:43:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-03 18:43:05,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2023-08-03 18:43:05,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-03 18:43:05,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-03 18:43:05,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:43:05,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-03 18:43:05,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 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 18:43:05,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 18:43:05,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 18:43:05,596 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 124 flow. Second operand 3 states and 374 transitions. [2023-08-03 18:43:05,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 216 flow [2023-08-03 18:43:05,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 50 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:43:05,599 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 134 flow [2023-08-03 18:43:05,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-03 18:43:05,602 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2023-08-03 18:43:05,602 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 134 flow [2023-08-03 18:43:05,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:43:05,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:43:05,603 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 18:43:05,616 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 18:43:05,812 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 18:43:05,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === 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 18:43:05,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:43:05,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1708957086, now seen corresponding path program 1 times [2023-08-03 18:43:05,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:43:05,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108706789] [2023-08-03 18:43:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:43:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:05,894 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 18:43:05,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:43:05,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108706789] [2023-08-03 18:43:05,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108706789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:43:05,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489278784] [2023-08-03 18:43:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:05,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:05,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:43:05,898 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 18:43:05,903 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 18:43:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:05,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:43:05,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:43:06,003 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 18:43:06,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:43:06,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489278784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:43:06,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:43:06,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 18:43:06,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600238000] [2023-08-03 18:43:06,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:43:06,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:43:06,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:43:06,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:43:06,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:43:06,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 209 [2023-08-03 18:43:06,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 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 18:43:06,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:43:06,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 209 [2023-08-03 18:43:06,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:43:09,024 INFO L124 PetriNetUnfolderBase]: 31394/45327 cut-off events. [2023-08-03 18:43:09,024 INFO L125 PetriNetUnfolderBase]: For 1431/1431 co-relation queries the response was YES. [2023-08-03 18:43:09,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88989 conditions, 45327 events. 31394/45327 cut-off events. For 1431/1431 co-relation queries the response was YES. Maximal size of possible extension queue 1645. Compared 315727 event pairs, 20088 based on Foata normal form. 9/43248 useless extension candidates. Maximal degree in co-relation 25474. Up to 41065 conditions per place. [2023-08-03 18:43:09,310 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 35 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-08-03 18:43:09,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 50 transitions, 229 flow [2023-08-03 18:43:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:43:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:43:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-08-03 18:43:09,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684210526315789 [2023-08-03 18:43:09,313 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-08-03 18:43:09,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-08-03 18:43:09,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:43:09,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-08-03 18:43:09,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 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 18:43:09,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 18:43:09,317 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 18:43:09,317 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 134 flow. Second operand 5 states and 594 transitions. [2023-08-03 18:43:09,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 50 transitions, 229 flow [2023-08-03 18:43:09,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 50 transitions, 225 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 18:43:09,321 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 150 flow [2023-08-03 18:43:09,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-08-03 18:43:09,322 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2023-08-03 18:43:09,322 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 150 flow [2023-08-03 18:43:09,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 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 18:43:09,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:43:09,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:43:09,331 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 18:43:09,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:09,529 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 18:43:09,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:43:09,529 INFO L85 PathProgramCache]: Analyzing trace with hash -464113714, now seen corresponding path program 1 times [2023-08-03 18:43:09,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:43:09,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547889447] [2023-08-03 18:43:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:09,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:43:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:09,593 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 18:43:09,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:43:09,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547889447] [2023-08-03 18:43:09,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547889447] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:43:09,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391710945] [2023-08-03 18:43:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:09,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:09,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:43:09,595 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 18:43:09,616 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 18:43:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:09,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:43:09,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:43:09,698 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 18:43:09,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:43:09,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391710945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:43:09,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:43:09,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:43:09,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517990313] [2023-08-03 18:43:09,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:43:09,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:43:09,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:43:09,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:43:09,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:43:09,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 209 [2023-08-03 18:43:09,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 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 18:43:09,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:43:09,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 209 [2023-08-03 18:43:09,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:43:12,303 INFO L124 PetriNetUnfolderBase]: 30722/43796 cut-off events. [2023-08-03 18:43:12,304 INFO L125 PetriNetUnfolderBase]: For 889/889 co-relation queries the response was YES. [2023-08-03 18:43:12,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86504 conditions, 43796 events. 30722/43796 cut-off events. For 889/889 co-relation queries the response was YES. Maximal size of possible extension queue 1603. Compared 299963 event pairs, 23570 based on Foata normal form. 0/41924 useless extension candidates. Maximal degree in co-relation 24644. Up to 37736 conditions per place. [2023-08-03 18:43:12,576 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 42 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-03 18:43:12,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 262 flow [2023-08-03 18:43:12,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:43:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:43:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-03 18:43:12,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6028708133971292 [2023-08-03 18:43:12,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-03 18:43:12,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-03 18:43:12,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:43:12,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-03 18:43:12,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 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 18:43:12,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 18:43:12,585 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 18:43:12,585 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 150 flow. Second operand 3 states and 378 transitions. [2023-08-03 18:43:12,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 262 flow [2023-08-03 18:43:12,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 255 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 18:43:12,589 INFO L231 Difference]: Finished difference. Result has 63 places, 44 transitions, 155 flow [2023-08-03 18:43:12,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=63, PETRI_TRANSITIONS=44} [2023-08-03 18:43:12,592 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2023-08-03 18:43:12,593 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 44 transitions, 155 flow [2023-08-03 18:43:12,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 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 18:43:12,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:43:12,593 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:43:12,598 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 18:43:12,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:12,799 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 18:43:12,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:43:12,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1327317042, now seen corresponding path program 1 times [2023-08-03 18:43:12,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:43:12,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149500875] [2023-08-03 18:43:12,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:12,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:43:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:12,852 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 18:43:12,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:43:12,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149500875] [2023-08-03 18:43:12,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149500875] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:43:12,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105207812] [2023-08-03 18:43:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:12,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:12,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:43:12,854 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 18:43:12,880 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 18:43:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:12,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:43:12,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:43:12,959 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 18:43:12,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:43:12,985 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 18:43:12,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105207812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:43:12,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:43:12,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 18:43:12,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015053672] [2023-08-03 18:43:12,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:43:12,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:43:12,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:43:12,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:43:12,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:43:13,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 209 [2023-08-03 18:43:13,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 44 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 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 18:43:13,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:43:13,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 209 [2023-08-03 18:43:13,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:43:15,129 INFO L124 PetriNetUnfolderBase]: 24220/34220 cut-off events. [2023-08-03 18:43:15,130 INFO L125 PetriNetUnfolderBase]: For 3657/3657 co-relation queries the response was YES. [2023-08-03 18:43:15,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70465 conditions, 34220 events. 24220/34220 cut-off events. For 3657/3657 co-relation queries the response was YES. Maximal size of possible extension queue 1295. Compared 221162 event pairs, 14814 based on Foata normal form. 3/34088 useless extension candidates. Maximal degree in co-relation 25033. Up to 31258 conditions per place. [2023-08-03 18:43:15,361 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 36 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-03 18:43:15,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 50 transitions, 241 flow [2023-08-03 18:43:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:43:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:43:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2023-08-03 18:43:15,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5765550239234449 [2023-08-03 18:43:15,365 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2023-08-03 18:43:15,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2023-08-03 18:43:15,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:43:15,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2023-08-03 18:43:15,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 0 states have call successors, (0), 0 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 18:43:15,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 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 18:43:15,370 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 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 18:43:15,370 INFO L175 Difference]: Start difference. First operand has 63 places, 44 transitions, 155 flow. Second operand 4 states and 482 transitions. [2023-08-03 18:43:15,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 50 transitions, 241 flow [2023-08-03 18:43:15,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 50 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:43:15,378 INFO L231 Difference]: Finished difference. Result has 65 places, 43 transitions, 151 flow [2023-08-03 18:43:15,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=65, PETRI_TRANSITIONS=43} [2023-08-03 18:43:15,378 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2023-08-03 18:43:15,378 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 43 transitions, 151 flow [2023-08-03 18:43:15,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 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 18:43:15,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:43:15,379 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:43:15,387 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 18:43:15,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:15,584 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 18:43:15,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:43:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1870648247, now seen corresponding path program 1 times [2023-08-03 18:43:15,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:43:15,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958741828] [2023-08-03 18:43:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:15,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:43:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:15,664 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 18:43:15,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:43:15,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958741828] [2023-08-03 18:43:15,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958741828] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:43:15,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542101504] [2023-08-03 18:43:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:15,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:15,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:43:15,672 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 18:43:15,691 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 18:43:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:15,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:43:15,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:43:15,793 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 18:43:15,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:43:15,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542101504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:43:15,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:43:15,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:43:15,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528533311] [2023-08-03 18:43:15,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:43:15,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:43:15,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:43:15,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:43:15,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:43:15,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 209 [2023-08-03 18:43:15,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 43 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 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 18:43:15,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:43:15,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 209 [2023-08-03 18:43:15,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:43:17,934 INFO L124 PetriNetUnfolderBase]: 24004/33775 cut-off events. [2023-08-03 18:43:17,934 INFO L125 PetriNetUnfolderBase]: For 3166/3166 co-relation queries the response was YES. [2023-08-03 18:43:18,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69385 conditions, 33775 events. 24004/33775 cut-off events. For 3166/3166 co-relation queries the response was YES. Maximal size of possible extension queue 1295. Compared 216770 event pairs, 6718 based on Foata normal form. 81/33748 useless extension candidates. Maximal degree in co-relation 24653. Up to 30429 conditions per place. [2023-08-03 18:43:18,133 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 48 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-08-03 18:43:18,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 295 flow [2023-08-03 18:43:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:43:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:43:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 606 transitions. [2023-08-03 18:43:18,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799043062200957 [2023-08-03 18:43:18,135 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 606 transitions. [2023-08-03 18:43:18,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 606 transitions. [2023-08-03 18:43:18,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:43:18,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 606 transitions. [2023-08-03 18:43:18,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 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 18:43:18,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 18:43:18,138 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 18:43:18,138 INFO L175 Difference]: Start difference. First operand has 65 places, 43 transitions, 151 flow. Second operand 5 states and 606 transitions. [2023-08-03 18:43:18,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 295 flow [2023-08-03 18:43:18,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 288 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 18:43:18,144 INFO L231 Difference]: Finished difference. Result has 66 places, 43 transitions, 163 flow [2023-08-03 18:43:18,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=163, PETRI_PLACES=66, PETRI_TRANSITIONS=43} [2023-08-03 18:43:18,145 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2023-08-03 18:43:18,145 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 43 transitions, 163 flow [2023-08-03 18:43:18,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 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 18:43:18,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:43:18,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:43:18,153 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 18:43:18,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:18,351 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 18:43:18,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:43:18,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1777630611, now seen corresponding path program 1 times [2023-08-03 18:43:18,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:43:18,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291384950] [2023-08-03 18:43:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:18,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:43:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:18,396 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 18:43:18,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:43:18,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291384950] [2023-08-03 18:43:18,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291384950] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:43:18,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657914639] [2023-08-03 18:43:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:18,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:18,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:43:18,398 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 18:43:18,400 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 18:43:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:18,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:43:18,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:43:18,495 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 18:43:18,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:43:18,509 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 18:43:18,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657914639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:43:18,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:43:18,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:43:18,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278737423] [2023-08-03 18:43:18,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:43:18,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:43:18,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:43:18,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:43:18,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:43:18,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 209 [2023-08-03 18:43:18,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 43 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 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 18:43:18,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:43:18,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 209 [2023-08-03 18:43:18,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:43:20,420 INFO L124 PetriNetUnfolderBase]: 18982/26404 cut-off events. [2023-08-03 18:43:20,420 INFO L125 PetriNetUnfolderBase]: For 2971/2971 co-relation queries the response was YES. [2023-08-03 18:43:20,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54541 conditions, 26404 events. 18982/26404 cut-off events. For 2971/2971 co-relation queries the response was YES. Maximal size of possible extension queue 1160. Compared 162920 event pairs, 11848 based on Foata normal form. 27/26350 useless extension candidates. Maximal degree in co-relation 19334. Up to 23785 conditions per place. [2023-08-03 18:43:20,561 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 44 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-03 18:43:20,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 57 transitions, 279 flow [2023-08-03 18:43:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:43:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:43:20,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2023-08-03 18:43:20,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861244019138756 [2023-08-03 18:43:20,563 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2023-08-03 18:43:20,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2023-08-03 18:43:20,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:43:20,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2023-08-03 18:43:20,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 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 18:43:20,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 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 18:43:20,567 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 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 18:43:20,567 INFO L175 Difference]: Start difference. First operand has 66 places, 43 transitions, 163 flow. Second operand 4 states and 490 transitions. [2023-08-03 18:43:20,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 57 transitions, 279 flow [2023-08-03 18:43:20,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 57 transitions, 274 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 18:43:20,572 INFO L231 Difference]: Finished difference. Result has 67 places, 42 transitions, 154 flow [2023-08-03 18:43:20,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=67, PETRI_TRANSITIONS=42} [2023-08-03 18:43:20,572 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2023-08-03 18:43:20,572 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 42 transitions, 154 flow [2023-08-03 18:43:20,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 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 18:43:20,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:43:20,573 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:43:20,581 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 18:43:20,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:20,778 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:43:20,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:43:20,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1423831927, now seen corresponding path program 1 times [2023-08-03 18:43:20,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:43:20,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286134172] [2023-08-03 18:43:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:20,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:43:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:43:20,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:43:20,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286134172] [2023-08-03 18:43:20,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286134172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:43:20,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851697895] [2023-08-03 18:43:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:20,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:20,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:43:20,850 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 18:43:20,853 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 18:43:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:20,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:43:20,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:43:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:43:20,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:43:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:43:20,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851697895] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:43:20,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:43:20,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:43:20,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945707415] [2023-08-03 18:43:20,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:43:20,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:43:20,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:43:20,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:43:20,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:43:20,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 209 [2023-08-03 18:43:20,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 42 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 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 18:43:20,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:43:20,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 209 [2023-08-03 18:43:20,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:43:22,281 INFO L124 PetriNetUnfolderBase]: 17362/23452 cut-off events. [2023-08-03 18:43:22,281 INFO L125 PetriNetUnfolderBase]: For 2359/2359 co-relation queries the response was YES. [2023-08-03 18:43:22,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49267 conditions, 23452 events. 17362/23452 cut-off events. For 2359/2359 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 132785 event pairs, 6886 based on Foata normal form. 243/23614 useless extension candidates. Maximal degree in co-relation 17468. Up to 11794 conditions per place. [2023-08-03 18:43:22,636 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 52 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-08-03 18:43:22,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 314 flow [2023-08-03 18:43:22,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:43:22,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:43:22,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 499 transitions. [2023-08-03 18:43:22,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59688995215311 [2023-08-03 18:43:22,638 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 499 transitions. [2023-08-03 18:43:22,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 499 transitions. [2023-08-03 18:43:22,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:43:22,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 499 transitions. [2023-08-03 18:43:22,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:43:22,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 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 18:43:22,642 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 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 18:43:22,642 INFO L175 Difference]: Start difference. First operand has 67 places, 42 transitions, 154 flow. Second operand 4 states and 499 transitions. [2023-08-03 18:43:22,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 314 flow [2023-08-03 18:43:22,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 308 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:43:22,646 INFO L231 Difference]: Finished difference. Result has 69 places, 43 transitions, 168 flow [2023-08-03 18:43:22,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=69, PETRI_TRANSITIONS=43} [2023-08-03 18:43:22,646 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2023-08-03 18:43:22,647 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 43 transitions, 168 flow [2023-08-03 18:43:22,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 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 18:43:22,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:43:22,647 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] [2023-08-03 18:43:22,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 18:43:22,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:22,852 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:43:22,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:43:22,853 INFO L85 PathProgramCache]: Analyzing trace with hash -265406120, now seen corresponding path program 1 times [2023-08-03 18:43:22,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:43:22,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39253483] [2023-08-03 18:43:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:22,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:43:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:43:23,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:43:23,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39253483] [2023-08-03 18:43:23,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39253483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:43:23,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:43:23,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 18:43:23,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300870751] [2023-08-03 18:43:23,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:43:23,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:43:23,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:43:23,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:43:23,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:43:23,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 209 [2023-08-03 18:43:23,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 43 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 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 18:43:23,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:43:23,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 209 [2023-08-03 18:43:23,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:43:27,183 INFO L124 PetriNetUnfolderBase]: 55666/69839 cut-off events. [2023-08-03 18:43:27,183 INFO L125 PetriNetUnfolderBase]: For 35496/35496 co-relation queries the response was YES. [2023-08-03 18:43:27,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161034 conditions, 69839 events. 55666/69839 cut-off events. For 35496/35496 co-relation queries the response was YES. Maximal size of possible extension queue 2518. Compared 372292 event pairs, 16870 based on Foata normal form. 36/69790 useless extension candidates. Maximal degree in co-relation 119017. Up to 68253 conditions per place. [2023-08-03 18:43:27,648 INFO L140 encePairwiseOnDemand]: 203/209 looper letters, 60 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2023-08-03 18:43:27,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 429 flow [2023-08-03 18:43:27,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:43:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:43:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-03 18:43:27,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6044657097288676 [2023-08-03 18:43:27,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-03 18:43:27,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-03 18:43:27,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:43:27,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-03 18:43:27,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 18:43:27,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 18:43:27,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 18:43:27,652 INFO L175 Difference]: Start difference. First operand has 69 places, 43 transitions, 168 flow. Second operand 3 states and 379 transitions. [2023-08-03 18:43:27,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 429 flow [2023-08-03 18:43:27,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 421 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 18:43:27,665 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 197 flow [2023-08-03 18:43:27,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2023-08-03 18:43:27,665 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2023-08-03 18:43:27,665 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 197 flow [2023-08-03 18:43:27,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 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 18:43:27,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:43:27,666 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:43:27,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 18:43:27,666 INFO L420 AbstractCegarLoop]: === Iteration 10 === 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 18:43:27,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:43:27,666 INFO L85 PathProgramCache]: Analyzing trace with hash -265406518, now seen corresponding path program 1 times [2023-08-03 18:43:27,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:43:27,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797367186] [2023-08-03 18:43:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:27,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:43:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:27,724 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 18:43:27,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:43:27,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797367186] [2023-08-03 18:43:27,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797367186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:43:27,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476141589] [2023-08-03 18:43:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:27,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:27,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:43:27,727 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 18:43:27,729 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 18:43:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:27,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:43:27,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:43:27,837 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 18:43:27,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:43:27,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476141589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:43:27,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:43:27,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:43:27,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164676114] [2023-08-03 18:43:27,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:43:27,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:43:27,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:43:27,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:43:27,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:43:27,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 209 [2023-08-03 18:43:27,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:43:27,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:43:27,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 209 [2023-08-03 18:43:27,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:43:30,195 INFO L124 PetriNetUnfolderBase]: 22981/30845 cut-off events. [2023-08-03 18:43:30,195 INFO L125 PetriNetUnfolderBase]: For 9440/9440 co-relation queries the response was YES. [2023-08-03 18:43:30,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74283 conditions, 30845 events. 22981/30845 cut-off events. For 9440/9440 co-relation queries the response was YES. Maximal size of possible extension queue 1359. Compared 176689 event pairs, 1034 based on Foata normal form. 1242/31373 useless extension candidates. Maximal degree in co-relation 37584. Up to 17745 conditions per place. [2023-08-03 18:43:30,393 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 65 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2023-08-03 18:43:30,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 79 transitions, 408 flow [2023-08-03 18:43:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:43:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:43:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 617 transitions. [2023-08-03 18:43:30,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904306220095694 [2023-08-03 18:43:30,394 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 617 transitions. [2023-08-03 18:43:30,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 617 transitions. [2023-08-03 18:43:30,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:43:30,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 617 transitions. [2023-08-03 18:43:30,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.4) internal successors, (617), 5 states have internal predecessors, (617), 0 states have call successors, (0), 0 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 18:43:30,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 18:43:30,398 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 18:43:30,398 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 197 flow. Second operand 5 states and 617 transitions. [2023-08-03 18:43:30,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 79 transitions, 408 flow [2023-08-03 18:43:30,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 79 transitions, 397 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:43:30,437 INFO L231 Difference]: Finished difference. Result has 71 places, 45 transitions, 185 flow [2023-08-03 18:43:30,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=71, PETRI_TRANSITIONS=45} [2023-08-03 18:43:30,438 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2023-08-03 18:43:30,438 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 45 transitions, 185 flow [2023-08-03 18:43:30,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:43:30,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:43:30,438 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] [2023-08-03 18:43:30,445 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 18:43:30,643 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 18:43:30,643 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 18:43:30,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:43:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1969824124, now seen corresponding path program 1 times [2023-08-03 18:43:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:43:30,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070178174] [2023-08-03 18:43:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:43:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 18:43:30,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:43:30,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070178174] [2023-08-03 18:43:30,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070178174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:43:30,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854364659] [2023-08-03 18:43:30,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:30,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:30,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:43:30,823 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 18:43:30,825 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 18:43:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:30,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 18:43:30,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:43:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:43:30,962 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:43:30,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854364659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:43:30,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:43:30,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-03 18:43:30,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607795773] [2023-08-03 18:43:30,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:43:30,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 18:43:30,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:43:30,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 18:43:30,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:43:30,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 209 [2023-08-03 18:43:30,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 45 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 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 18:43:30,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:43:30,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 209 [2023-08-03 18:43:30,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:43:33,148 INFO L124 PetriNetUnfolderBase]: 25372/33457 cut-off events. [2023-08-03 18:43:33,148 INFO L125 PetriNetUnfolderBase]: For 20565/20565 co-relation queries the response was YES. [2023-08-03 18:43:33,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81077 conditions, 33457 events. 25372/33457 cut-off events. For 20565/20565 co-relation queries the response was YES. Maximal size of possible extension queue 1513. Compared 179618 event pairs, 5541 based on Foata normal form. 1233/33888 useless extension candidates. Maximal degree in co-relation 59228. Up to 25641 conditions per place. [2023-08-03 18:43:33,391 INFO L140 encePairwiseOnDemand]: 200/209 looper letters, 78 selfloop transitions, 13 changer transitions 2/104 dead transitions. [2023-08-03 18:43:33,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 104 transitions, 583 flow [2023-08-03 18:43:33,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:43:33,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:43:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 606 transitions. [2023-08-03 18:43:33,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799043062200957 [2023-08-03 18:43:33,394 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 606 transitions. [2023-08-03 18:43:33,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 606 transitions. [2023-08-03 18:43:33,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:43:33,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 606 transitions. [2023-08-03 18:43:33,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 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 18:43:33,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 18:43:33,398 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 18:43:33,398 INFO L175 Difference]: Start difference. First operand has 71 places, 45 transitions, 185 flow. Second operand 5 states and 606 transitions. [2023-08-03 18:43:33,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 104 transitions, 583 flow [2023-08-03 18:43:33,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 104 transitions, 573 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:43:33,409 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 283 flow [2023-08-03 18:43:33,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2023-08-03 18:43:33,409 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2023-08-03 18:43:33,409 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 283 flow [2023-08-03 18:43:33,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 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 18:43:33,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:43:33,410 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] [2023-08-03 18:43:33,418 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 18:43:33,614 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 18:43:33,615 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 18:43:33,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:43:33,615 INFO L85 PathProgramCache]: Analyzing trace with hash 244284668, now seen corresponding path program 1 times [2023-08-03 18:43:33,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:43:33,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652607643] [2023-08-03 18:43:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:33,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:43:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:43:33,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:43:33,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652607643] [2023-08-03 18:43:33,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652607643] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:43:33,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:43:33,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 18:43:33,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220381705] [2023-08-03 18:43:33,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:43:33,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:43:33,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:43:33,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:43:33,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:43:33,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 209 [2023-08-03 18:43:33,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 283 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 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 18:43:33,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:43:33,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 209 [2023-08-03 18:43:33,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:43:36,160 INFO L124 PetriNetUnfolderBase]: 24246/34162 cut-off events. [2023-08-03 18:43:36,161 INFO L125 PetriNetUnfolderBase]: For 37748/37748 co-relation queries the response was YES. [2023-08-03 18:43:36,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106846 conditions, 34162 events. 24246/34162 cut-off events. For 37748/37748 co-relation queries the response was YES. Maximal size of possible extension queue 1626. Compared 222008 event pairs, 4562 based on Foata normal form. 69/33649 useless extension candidates. Maximal degree in co-relation 76192. Up to 26068 conditions per place. [2023-08-03 18:43:36,714 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 59 selfloop transitions, 5 changer transitions 5/80 dead transitions. [2023-08-03 18:43:36,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 539 flow [2023-08-03 18:43:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:43:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:43:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-03 18:43:36,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6108452950558214 [2023-08-03 18:43:36,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-03 18:43:36,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-03 18:43:36,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:43:36,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-03 18:43:36,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:43:36,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 18:43:36,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 18:43:36,720 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 283 flow. Second operand 3 states and 383 transitions. [2023-08-03 18:43:36,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 539 flow [2023-08-03 18:43:36,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 80 transitions, 528 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:43:36,750 INFO L231 Difference]: Finished difference. Result has 77 places, 57 transitions, 293 flow [2023-08-03 18:43:36,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=77, PETRI_TRANSITIONS=57} [2023-08-03 18:43:36,751 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 23 predicate places. [2023-08-03 18:43:36,751 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 57 transitions, 293 flow [2023-08-03 18:43:36,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 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 18:43:36,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:43:36,752 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] [2023-08-03 18:43:36,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 18:43:36,752 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 18:43:36,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:43:36,752 INFO L85 PathProgramCache]: Analyzing trace with hash 261442749, now seen corresponding path program 1 times [2023-08-03 18:43:36,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:43:36,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767781425] [2023-08-03 18:43:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:36,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:43:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 18:43:36,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:43:36,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767781425] [2023-08-03 18:43:36,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767781425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:43:36,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950436327] [2023-08-03 18:43:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:36,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:36,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:43:36,906 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 18:43:36,928 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 18:43:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:37,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-03 18:43:37,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:43:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 18:43:37,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:43:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 18:43:37,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950436327] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:43:37,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:43:37,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-03 18:43:37,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817198791] [2023-08-03 18:43:37,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:43:37,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-03 18:43:37,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:43:37,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-03 18:43:37,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-03 18:43:37,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 209 [2023-08-03 18:43:37,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 57 transitions, 293 flow. Second operand has 9 states, 9 states have (on average 99.55555555555556) internal successors, (896), 9 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:43:37,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:43:37,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 209 [2023-08-03 18:43:37,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:43:48,004 INFO L124 PetriNetUnfolderBase]: 122253/155750 cut-off events. [2023-08-03 18:43:48,005 INFO L125 PetriNetUnfolderBase]: For 200718/200718 co-relation queries the response was YES. [2023-08-03 18:43:48,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494480 conditions, 155750 events. 122253/155750 cut-off events. For 200718/200718 co-relation queries the response was YES. Maximal size of possible extension queue 4588. Compared 874610 event pairs, 3411 based on Foata normal form. 6393/162072 useless extension candidates. Maximal degree in co-relation 428174. Up to 53131 conditions per place. [2023-08-03 18:43:49,024 INFO L140 encePairwiseOnDemand]: 196/209 looper letters, 252 selfloop transitions, 79 changer transitions 256/590 dead transitions. [2023-08-03 18:43:49,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 590 transitions, 3831 flow [2023-08-03 18:43:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-03 18:43:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-03 18:43:49,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2842 transitions. [2023-08-03 18:43:49,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439234449760766 [2023-08-03 18:43:49,031 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2842 transitions. [2023-08-03 18:43:49,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2842 transitions. [2023-08-03 18:43:49,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:43:49,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2842 transitions. [2023-08-03 18:43:49,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 113.68) internal successors, (2842), 25 states have internal predecessors, (2842), 0 states have call successors, (0), 0 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 18:43:49,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 209.0) internal successors, (5434), 26 states have internal predecessors, (5434), 0 states have call successors, (0), 0 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 18:43:49,045 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 209.0) internal successors, (5434), 26 states have internal predecessors, (5434), 0 states have call successors, (0), 0 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 18:43:49,045 INFO L175 Difference]: Start difference. First operand has 77 places, 57 transitions, 293 flow. Second operand 25 states and 2842 transitions. [2023-08-03 18:43:49,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 590 transitions, 3831 flow [2023-08-03 18:43:49,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 590 transitions, 3786 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:43:49,627 INFO L231 Difference]: Finished difference. Result has 121 places, 135 transitions, 1131 flow [2023-08-03 18:43:49,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1131, PETRI_PLACES=121, PETRI_TRANSITIONS=135} [2023-08-03 18:43:49,627 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 67 predicate places. [2023-08-03 18:43:49,627 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 135 transitions, 1131 flow [2023-08-03 18:43:49,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.55555555555556) internal successors, (896), 9 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:43:49,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:43:49,628 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] [2023-08-03 18:43:49,633 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 18:43:49,831 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,SelfDestructingSolverStorable14 [2023-08-03 18:43:49,831 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:43:49,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:43:49,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1276160630, now seen corresponding path program 1 times [2023-08-03 18:43:49,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:43:49,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721837778] [2023-08-03 18:43:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:49,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:43:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:43:49,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:43:49,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721837778] [2023-08-03 18:43:49,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721837778] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:43:49,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934335578] [2023-08-03 18:43:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:43:49,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:43:49,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:43:49,955 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 18:43:49,958 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 18:43:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:43:50,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-03 18:43:50,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:43:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:43:50,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:43:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:43:50,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934335578] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:43:50,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:43:50,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 7] total 16 [2023-08-03 18:43:50,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084768960] [2023-08-03 18:43:50,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:43:50,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 18:43:50,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:43:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 18:43:50,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-08-03 18:43:50,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 209 [2023-08-03 18:43:50,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 135 transitions, 1131 flow. Second operand has 17 states, 17 states have (on average 97.3529411764706) internal successors, (1655), 17 states have internal predecessors, (1655), 0 states have call successors, (0), 0 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 18:43:50,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:43:50,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 209 [2023-08-03 18:43:50,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:44:29,071 INFO L124 PetriNetUnfolderBase]: 256242/338914 cut-off events. [2023-08-03 18:44:29,071 INFO L125 PetriNetUnfolderBase]: For 2077672/2084432 co-relation queries the response was YES. [2023-08-03 18:44:33,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1557237 conditions, 338914 events. 256242/338914 cut-off events. For 2077672/2084432 co-relation queries the response was YES. Maximal size of possible extension queue 14766. Compared 2428457 event pairs, 2994 based on Foata normal form. 4309/340707 useless extension candidates. Maximal degree in co-relation 1557104. Up to 138961 conditions per place. [2023-08-03 18:44:35,388 INFO L140 encePairwiseOnDemand]: 192/209 looper letters, 640 selfloop transitions, 631 changer transitions 101/1385 dead transitions. [2023-08-03 18:44:35,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 1385 transitions, 13567 flow [2023-08-03 18:44:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-03 18:44:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-03 18:44:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 5107 transitions. [2023-08-03 18:44:35,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5312044934470563 [2023-08-03 18:44:35,426 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 5107 transitions. [2023-08-03 18:44:35,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 5107 transitions. [2023-08-03 18:44:35,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:44:35,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 5107 transitions. [2023-08-03 18:44:35,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 111.02173913043478) internal successors, (5107), 46 states have internal predecessors, (5107), 0 states have call successors, (0), 0 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 18:44:35,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 209.0) internal successors, (9823), 47 states have internal predecessors, (9823), 0 states have call successors, (0), 0 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 18:44:35,471 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 209.0) internal successors, (9823), 47 states have internal predecessors, (9823), 0 states have call successors, (0), 0 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 18:44:35,472 INFO L175 Difference]: Start difference. First operand has 121 places, 135 transitions, 1131 flow. Second operand 46 states and 5107 transitions. [2023-08-03 18:44:35,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 1385 transitions, 13567 flow