/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_safe008_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 18:07:03,912 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 18:07:03,981 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 18:07:03,987 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 18:07:03,988 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 18:07:03,988 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 18:07:03,989 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 18:07:04,023 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 18:07:04,023 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 18:07:04,027 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 18:07:04,027 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 18:07:04,028 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 18:07:04,028 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 18:07:04,029 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 18:07:04,030 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 18:07:04,030 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 18:07:04,030 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 18:07:04,030 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 18:07:04,030 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 18:07:04,031 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 18:07:04,031 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 18:07:04,031 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 18:07:04,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 18:07:04,031 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 18:07:04,032 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 18:07:04,032 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 18:07:04,032 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 18:07:04,033 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 18:07:04,033 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 18:07:04,033 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 18:07:04,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:07:04,034 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 18:07:04,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 18:07:04,035 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 18:07:04,035 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 18:07:04,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 18:07:04,035 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 18:07:04,035 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 18:07:04,035 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 18:07:04,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 18:07:04,036 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 18:07:04,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 18:07:04,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 18:07:04,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 18:07:04,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 18:07:04,290 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 18:07:04,290 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 18:07:04,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe008_tso_bound2.i [2023-08-03 18:07:05,517 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 18:07:05,743 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 18:07:05,744 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe008_tso_bound2.i [2023-08-03 18:07:05,764 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ac592d2b/132e7660e5724bd8a1b8faca08e2f49a/FLAG0f4dc85c4 [2023-08-03 18:07:05,780 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ac592d2b/132e7660e5724bd8a1b8faca08e2f49a [2023-08-03 18:07:05,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 18:07:05,784 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 18:07:05,785 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 18:07:05,785 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 18:07:05,791 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 18:07:05,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:07:05" (1/1) ... [2023-08-03 18:07:05,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f2b5865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:05, skipping insertion in model container [2023-08-03 18:07:05,793 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:07:05" (1/1) ... [2023-08-03 18:07:05,836 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 18:07:05,983 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_safe008_tso_bound2.i[945,958] [2023-08-03 18:07:06,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:07:06,178 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 18:07:06,190 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_safe008_tso_bound2.i[945,958] [2023-08-03 18:07:06,210 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 18:07:06,218 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 18:07:06,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:07:06,267 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:07:06,267 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:07:06,273 INFO L206 MainTranslator]: Completed translation [2023-08-03 18:07:06,274 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:06 WrapperNode [2023-08-03 18:07:06,274 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 18:07:06,275 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 18:07:06,276 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 18:07:06,276 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 18:07:06,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:06" (1/1) ... [2023-08-03 18:07:06,303 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:06" (1/1) ... [2023-08-03 18:07:06,324 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2023-08-03 18:07:06,325 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 18:07:06,326 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 18:07:06,326 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 18:07:06,326 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 18:07:06,333 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:06" (1/1) ... [2023-08-03 18:07:06,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:06" (1/1) ... [2023-08-03 18:07:06,346 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:06" (1/1) ... [2023-08-03 18:07:06,347 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:06" (1/1) ... [2023-08-03 18:07:06,352 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:06" (1/1) ... [2023-08-03 18:07:06,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:06" (1/1) ... [2023-08-03 18:07:06,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:06" (1/1) ... [2023-08-03 18:07:06,357 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:06" (1/1) ... [2023-08-03 18:07:06,360 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 18:07:06,360 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 18:07:06,360 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 18:07:06,361 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 18:07:06,361 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:06" (1/1) ... [2023-08-03 18:07:06,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:07:06,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:07:06,393 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 18:07:06,394 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 18:07:06,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 18:07:06,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 18:07:06,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 18:07:06,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 18:07:06,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 18:07:06,421 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 18:07:06,421 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 18:07:06,422 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 18:07:06,422 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 18:07:06,422 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 18:07:06,422 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 18:07:06,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 18:07:06,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 18:07:06,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 18:07:06,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 18:07:06,424 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 18:07:06,544 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 18:07:06,546 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 18:07:06,709 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 18:07:06,715 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 18:07:06,716 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 18:07:06,717 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:07:06 BoogieIcfgContainer [2023-08-03 18:07:06,718 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 18:07:06,719 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 18:07:06,720 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 18:07:06,722 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 18:07:06,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 06:07:05" (1/3) ... [2023-08-03 18:07:06,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b3144d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:07:06, skipping insertion in model container [2023-08-03 18:07:06,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:06" (2/3) ... [2023-08-03 18:07:06,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b3144d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:07:06, skipping insertion in model container [2023-08-03 18:07:06,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:07:06" (3/3) ... [2023-08-03 18:07:06,724 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe008_tso_bound2.i [2023-08-03 18:07:06,729 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 18:07:06,736 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 18:07:06,736 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 18:07:06,736 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 18:07:06,781 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:07:06,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 106 transitions, 227 flow [2023-08-03 18:07:06,906 INFO L124 PetriNetUnfolderBase]: 30/414 cut-off events. [2023-08-03 18:07:06,906 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:07:06,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 414 events. 30/414 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1840 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 243. Up to 16 conditions per place. [2023-08-03 18:07:06,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 106 transitions, 227 flow [2023-08-03 18:07:06,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 94 transitions, 203 flow [2023-08-03 18:07:06,922 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:07:06,929 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 94 transitions, 203 flow [2023-08-03 18:07:06,932 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 94 transitions, 203 flow [2023-08-03 18:07:06,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 94 transitions, 203 flow [2023-08-03 18:07:06,976 INFO L124 PetriNetUnfolderBase]: 22/318 cut-off events. [2023-08-03 18:07:06,977 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:07:06,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 318 events. 22/318 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1296 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 195. Up to 16 conditions per place. [2023-08-03 18:07:06,982 INFO L119 LiptonReduction]: Number of co-enabled transitions 1692 [2023-08-03 18:07:08,917 INFO L134 LiptonReduction]: Checked pairs total: 3221 [2023-08-03 18:07:08,917 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-03 18:07:08,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:07:08,933 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;@1e5d344e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:07:08,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:07:08,936 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:07:08,937 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-03 18:07:08,937 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:07:08,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:08,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 18:07:08,938 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 18:07:08,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:08,942 INFO L85 PathProgramCache]: Analyzing trace with hash 357342395, now seen corresponding path program 1 times [2023-08-03 18:07:08,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:08,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83123364] [2023-08-03 18:07:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:08,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:09,176 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 18:07:09,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:09,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83123364] [2023-08-03 18:07:09,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83123364] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:07:09,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:07:09,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:07:09,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951466920] [2023-08-03 18:07:09,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:07:09,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:07:09,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:09,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:07:09,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:07:09,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 183 [2023-08-03 18:07:09,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 18:07:09,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:09,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 183 [2023-08-03 18:07:09,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:09,352 INFO L124 PetriNetUnfolderBase]: 400/774 cut-off events. [2023-08-03 18:07:09,352 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 18:07:09,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1500 conditions, 774 events. 400/774 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4046 event pairs, 310 based on Foata normal form. 0/705 useless extension candidates. Maximal degree in co-relation 1483. Up to 668 conditions per place. [2023-08-03 18:07:09,360 INFO L140 encePairwiseOnDemand]: 179/183 looper letters, 21 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-03 18:07:09,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 119 flow [2023-08-03 18:07:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:07:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:07:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-03 18:07:09,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5537340619307832 [2023-08-03 18:07:09,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-03 18:07:09,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-03 18:07:09,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:07:09,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-03 18:07:09,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 18:07:09,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 18:07:09,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 18:07:09,387 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 69 flow. Second operand 3 states and 304 transitions. [2023-08-03 18:07:09,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 119 flow [2023-08-03 18:07:09,390 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 18:07:09,391 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 75 flow [2023-08-03 18:07:09,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, 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 18:07:09,396 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-03 18:07:09,396 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 75 flow [2023-08-03 18:07:09,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 18:07:09,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:09,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 18:07:09,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 18:07:09,397 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:07:09,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:09,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1812004495, now seen corresponding path program 1 times [2023-08-03 18:07:09,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:09,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179056622] [2023-08-03 18:07:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:09,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:07:09,419 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 18:07:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:07:09,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 18:07:09,448 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 18:07:09,449 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 18:07:09,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 18:07:09,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 18:07:09,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 18:07:09,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 18:07:09,452 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 18:07:09,454 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 18:07:09,455 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 18:07:09,476 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:07:09,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 127 transitions, 290 flow [2023-08-03 18:07:09,647 INFO L124 PetriNetUnfolderBase]: 93/1304 cut-off events. [2023-08-03 18:07:09,647 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:07:09,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 1304 events. 93/1304 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8869 event pairs, 0 based on Foata normal form. 0/1145 useless extension candidates. Maximal degree in co-relation 945. Up to 54 conditions per place. [2023-08-03 18:07:09,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 127 transitions, 290 flow [2023-08-03 18:07:09,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 115 transitions, 266 flow [2023-08-03 18:07:09,659 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:07:09,659 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 115 transitions, 266 flow [2023-08-03 18:07:09,659 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 115 transitions, 266 flow [2023-08-03 18:07:09,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 115 transitions, 266 flow [2023-08-03 18:07:09,754 INFO L124 PetriNetUnfolderBase]: 66/980 cut-off events. [2023-08-03 18:07:09,755 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:07:09,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 980 events. 66/980 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6115 event pairs, 0 based on Foata normal form. 0/875 useless extension candidates. Maximal degree in co-relation 729. Up to 54 conditions per place. [2023-08-03 18:07:09,774 INFO L119 LiptonReduction]: Number of co-enabled transitions 4140 [2023-08-03 18:07:11,576 INFO L134 LiptonReduction]: Checked pairs total: 8749 [2023-08-03 18:07:11,577 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-03 18:07:11,579 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:07:11,580 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;@1e5d344e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:07:11,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:07:11,582 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:07:11,582 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-03 18:07:11,583 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:07:11,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:11,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 18:07:11,583 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 18:07:11,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:11,584 INFO L85 PathProgramCache]: Analyzing trace with hash 576984414, now seen corresponding path program 1 times [2023-08-03 18:07:11,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:11,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051473592] [2023-08-03 18:07:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:11,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:11,632 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 18:07:11,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:11,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051473592] [2023-08-03 18:07:11,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051473592] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:07:11,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:07:11,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:07:11,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535189770] [2023-08-03 18:07:11,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:07:11,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:07:11,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:11,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:07:11,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:07:11,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 210 [2023-08-03 18:07:11,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 120 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 18:07:11,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:11,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 210 [2023-08-03 18:07:11,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:15,726 INFO L124 PetriNetUnfolderBase]: 33046/48452 cut-off events. [2023-08-03 18:07:15,726 INFO L125 PetriNetUnfolderBase]: For 1788/1788 co-relation queries the response was YES. [2023-08-03 18:07:15,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94425 conditions, 48452 events. 33046/48452 cut-off events. For 1788/1788 co-relation queries the response was YES. Maximal size of possible extension queue 1683. Compared 347350 event pairs, 26064 based on Foata normal form. 0/45605 useless extension candidates. Maximal degree in co-relation 26814. Up to 43520 conditions per place. [2023-08-03 18:07:16,105 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 31 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-03 18:07:16,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 192 flow [2023-08-03 18:07:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:07:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:07:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-03 18:07:16,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841269841269842 [2023-08-03 18:07:16,111 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-03 18:07:16,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-03 18:07:16,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:07:16,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-03 18:07:16,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states 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 18:07:16,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:07:16,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:07:16,117 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 120 flow. Second operand 3 states and 368 transitions. [2023-08-03 18:07:16,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 192 flow [2023-08-03 18:07:16,125 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 18:07:16,126 INFO L231 Difference]: Finished difference. Result has 57 places, 42 transitions, 124 flow [2023-08-03 18:07:16,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 18:07:16,127 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-03 18:07:16,127 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 42 transitions, 124 flow [2023-08-03 18:07:16,127 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 18:07:16,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:16,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:07:16,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 18:07:16,128 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 18:07:16,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash -127849509, now seen corresponding path program 1 times [2023-08-03 18:07:16,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:16,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854899184] [2023-08-03 18:07:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:16,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:16,224 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 18:07:16,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:16,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854899184] [2023-08-03 18:07:16,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854899184] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:07:16,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940300045] [2023-08-03 18:07:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:16,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:07:16,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:07:16,233 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 18:07:16,357 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 18:07:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:16,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:07:16,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:07:16,438 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 18:07:16,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:07:16,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940300045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:07:16,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:07:16,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:07:16,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240048659] [2023-08-03 18:07:16,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:07:16,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:07:16,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:16,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:07:16,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:07:16,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 210 [2023-08-03 18:07:16,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 124 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 18:07:16,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:16,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 210 [2023-08-03 18:07:16,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:19,186 INFO L124 PetriNetUnfolderBase]: 31406/45488 cut-off events. [2023-08-03 18:07:19,187 INFO L125 PetriNetUnfolderBase]: For 1287/1287 co-relation queries the response was YES. [2023-08-03 18:07:19,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88840 conditions, 45488 events. 31406/45488 cut-off events. For 1287/1287 co-relation queries the response was YES. Maximal size of possible extension queue 1636. Compared 319994 event pairs, 24928 based on Foata normal form. 0/43244 useless extension candidates. Maximal degree in co-relation 88803. Up to 40987 conditions per place. [2023-08-03 18:07:19,474 INFO L140 encePairwiseOnDemand]: 207/210 looper letters, 36 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-03 18:07:19,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 216 flow [2023-08-03 18:07:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:07:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:07:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-03 18:07:19,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2023-08-03 18:07:19,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-03 18:07:19,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-03 18:07:19,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:07:19,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-03 18:07:19,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states 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 18:07:19,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:07:19,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:07:19,483 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 124 flow. Second operand 3 states and 371 transitions. [2023-08-03 18:07:19,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 216 flow [2023-08-03 18:07:19,485 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 18:07:19,486 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 134 flow [2023-08-03 18:07:19,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 18:07:19,489 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2023-08-03 18:07:19,489 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 134 flow [2023-08-03 18:07:19,489 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 18:07:19,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:19,490 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 18:07:19,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 18:07:19,695 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 18:07:19,696 INFO L420 AbstractCegarLoop]: === Iteration 3 === 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 18:07:19,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:19,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1300446230, now seen corresponding path program 1 times [2023-08-03 18:07:19,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:19,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352569061] [2023-08-03 18:07:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:19,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:19,794 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 18:07:19,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:19,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352569061] [2023-08-03 18:07:19,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352569061] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:07:19,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071138385] [2023-08-03 18:07:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:19,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:07:19,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:07:19,801 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 18:07:19,804 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 18:07:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:19,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:07:19,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:07:19,918 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 18:07:19,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:07:19,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071138385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:07:19,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:07:19,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 18:07:19,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555636530] [2023-08-03 18:07:19,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:07:19,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:07:19,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:19,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:07:19,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:07:19,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-03 18:07:19,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states 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 18:07:19,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:19,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-03 18:07:19,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:22,942 INFO L124 PetriNetUnfolderBase]: 31394/45327 cut-off events. [2023-08-03 18:07:22,942 INFO L125 PetriNetUnfolderBase]: For 1431/1431 co-relation queries the response was YES. [2023-08-03 18:07:23,135 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 1644. Compared 315495 event pairs, 20088 based on Foata normal form. 9/43380 useless extension candidates. Maximal degree in co-relation 25474. Up to 41065 conditions per place. [2023-08-03 18:07:23,511 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 35 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-08-03 18:07:23,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 50 transitions, 229 flow [2023-08-03 18:07:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:07:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:07:23,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2023-08-03 18:07:23,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.560952380952381 [2023-08-03 18:07:23,515 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2023-08-03 18:07:23,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2023-08-03 18:07:23,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:07:23,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2023-08-03 18:07:23,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 18:07:23,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 210.0) internal successors, (1260), 6 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 18:07:23,522 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 210.0) internal successors, (1260), 6 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 18:07:23,522 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 134 flow. Second operand 5 states and 589 transitions. [2023-08-03 18:07:23,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 50 transitions, 229 flow [2023-08-03 18:07:23,524 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 18:07:23,526 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 150 flow [2023-08-03 18:07:23,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 18:07:23,528 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2023-08-03 18:07:23,528 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 150 flow [2023-08-03 18:07:23,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states 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 18:07:23,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:23,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:07:23,535 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 18:07:23,734 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 18:07:23,735 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 18:07:23,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:23,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1144281298, now seen corresponding path program 1 times [2023-08-03 18:07:23,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:23,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371638114] [2023-08-03 18:07:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:23,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:23,786 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 18:07:23,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371638114] [2023-08-03 18:07:23,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371638114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:07:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090072730] [2023-08-03 18:07:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:23,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:07:23,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:07:23,789 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 18:07:23,792 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 18:07:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:23,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:07:23,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:07:23,896 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 18:07:23,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:07:23,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090072730] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:07:23,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:07:23,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:07:23,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757729147] [2023-08-03 18:07:23,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:07:23,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:07:23,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:23,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:07:23,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:07:23,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 210 [2023-08-03 18:07:23,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 150 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 18:07:23,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:23,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 210 [2023-08-03 18:07:23,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:26,534 INFO L124 PetriNetUnfolderBase]: 30722/43796 cut-off events. [2023-08-03 18:07:26,534 INFO L125 PetriNetUnfolderBase]: For 889/889 co-relation queries the response was YES. [2023-08-03 18:07:26,704 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 299812 event pairs, 23570 based on Foata normal form. 0/42056 useless extension candidates. Maximal degree in co-relation 24644. Up to 37736 conditions per place. [2023-08-03 18:07:26,918 INFO L140 encePairwiseOnDemand]: 207/210 looper letters, 42 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-03 18:07:26,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 262 flow [2023-08-03 18:07:26,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:07:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:07:26,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-03 18:07:26,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2023-08-03 18:07:26,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-03 18:07:26,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-03 18:07:26,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:07:26,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-03 18:07:26,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 18:07:26,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:07:26,927 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:07:26,928 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 150 flow. Second operand 3 states and 375 transitions. [2023-08-03 18:07:26,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 262 flow [2023-08-03 18:07:26,931 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 18:07:26,932 INFO L231 Difference]: Finished difference. Result has 63 places, 44 transitions, 155 flow [2023-08-03 18:07:26,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 18:07:26,935 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2023-08-03 18:07:26,936 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 44 transitions, 155 flow [2023-08-03 18:07:26,936 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 18:07:26,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:26,936 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:07:26,946 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 18:07:27,142 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 18:07:27,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === 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 18:07:27,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:27,143 INFO L85 PathProgramCache]: Analyzing trace with hash -150523736, now seen corresponding path program 1 times [2023-08-03 18:07:27,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:27,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492208641] [2023-08-03 18:07:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:27,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:27,182 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 18:07:27,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:27,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492208641] [2023-08-03 18:07:27,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492208641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:07:27,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65186311] [2023-08-03 18:07:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:27,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:07:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:07:27,185 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 18:07:27,211 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 18:07:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:27,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:07:27,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:07:27,293 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 18:07:27,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:07:27,319 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 18:07:27,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65186311] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:07:27,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:07:27,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 18:07:27,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375373016] [2023-08-03 18:07:27,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:07:27,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:07:27,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:27,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:07:27,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:07:27,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-03 18:07:27,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 44 transitions, 155 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 18:07:27,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:27,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-03 18:07:27,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:29,631 INFO L124 PetriNetUnfolderBase]: 24220/34220 cut-off events. [2023-08-03 18:07:29,631 INFO L125 PetriNetUnfolderBase]: For 3657/3657 co-relation queries the response was YES. [2023-08-03 18:07:29,791 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 221075 event pairs, 14814 based on Foata normal form. 3/34187 useless extension candidates. Maximal degree in co-relation 25033. Up to 31258 conditions per place. [2023-08-03 18:07:29,955 INFO L140 encePairwiseOnDemand]: 207/210 looper letters, 36 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-03 18:07:29,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 50 transitions, 241 flow [2023-08-03 18:07:29,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:07:29,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:07:29,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 478 transitions. [2023-08-03 18:07:29,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2023-08-03 18:07:29,958 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 478 transitions. [2023-08-03 18:07:29,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 478 transitions. [2023-08-03 18:07:29,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:07:29,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 478 transitions. [2023-08-03 18:07:29,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states 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 18:07:29,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 18:07:29,962 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 18:07:29,962 INFO L175 Difference]: Start difference. First operand has 63 places, 44 transitions, 155 flow. Second operand 4 states and 478 transitions. [2023-08-03 18:07:29,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 50 transitions, 241 flow [2023-08-03 18:07:29,967 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 18:07:29,968 INFO L231 Difference]: Finished difference. Result has 65 places, 43 transitions, 151 flow [2023-08-03 18:07:29,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 18:07:29,969 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2023-08-03 18:07:29,970 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 43 transitions, 151 flow [2023-08-03 18:07:29,970 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 18:07:29,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:29,970 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:07:29,980 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 18:07:30,176 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 18:07:30,177 INFO L420 AbstractCegarLoop]: === Iteration 6 === 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 18:07:30,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:30,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1488708522, now seen corresponding path program 1 times [2023-08-03 18:07:30,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:30,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117547332] [2023-08-03 18:07:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:30,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:30,283 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 18:07:30,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:30,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117547332] [2023-08-03 18:07:30,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117547332] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:07:30,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814735923] [2023-08-03 18:07:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:30,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:07:30,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:07:30,288 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 18:07:30,292 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 18:07:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:30,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:07:30,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:07:30,395 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 18:07:30,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:07:30,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814735923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:07:30,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:07:30,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:07:30,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382149670] [2023-08-03 18:07:30,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:07:30,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:07:30,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:30,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:07:30,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:07:30,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-03 18:07:30,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 43 transitions, 151 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 18:07:30,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:30,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-03 18:07:30,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:33,150 INFO L124 PetriNetUnfolderBase]: 24004/33775 cut-off events. [2023-08-03 18:07:33,151 INFO L125 PetriNetUnfolderBase]: For 3166/3166 co-relation queries the response was YES. [2023-08-03 18:07:33,266 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 1294. Compared 216557 event pairs, 6718 based on Foata normal form. 81/33847 useless extension candidates. Maximal degree in co-relation 24653. Up to 30429 conditions per place. [2023-08-03 18:07:33,381 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 48 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-08-03 18:07:33,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 295 flow [2023-08-03 18:07:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:07:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:07:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 601 transitions. [2023-08-03 18:07:33,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5723809523809524 [2023-08-03 18:07:33,391 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 601 transitions. [2023-08-03 18:07:33,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 601 transitions. [2023-08-03 18:07:33,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:07:33,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 601 transitions. [2023-08-03 18:07:33,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states 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 18:07:33,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 210.0) internal successors, (1260), 6 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 18:07:33,395 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 210.0) internal successors, (1260), 6 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 18:07:33,395 INFO L175 Difference]: Start difference. First operand has 65 places, 43 transitions, 151 flow. Second operand 5 states and 601 transitions. [2023-08-03 18:07:33,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 295 flow [2023-08-03 18:07:33,400 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 18:07:33,403 INFO L231 Difference]: Finished difference. Result has 66 places, 43 transitions, 163 flow [2023-08-03 18:07:33,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 18:07:33,404 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2023-08-03 18:07:33,404 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 43 transitions, 163 flow [2023-08-03 18:07:33,405 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 18:07:33,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:33,405 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 18:07:33,414 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 18:07:33,611 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 18:07:33,612 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 18:07:33,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:33,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1517614369, now seen corresponding path program 1 times [2023-08-03 18:07:33,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:33,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614368495] [2023-08-03 18:07:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:33,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:33,682 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 18:07:33,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:33,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614368495] [2023-08-03 18:07:33,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614368495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:07:33,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934053744] [2023-08-03 18:07:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:33,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:07:33,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:07:33,684 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 18:07:33,687 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 18:07:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:33,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:07:33,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:07:33,790 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 18:07:33,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:07:33,804 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 18:07:33,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934053744] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:07:33,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:07:33,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:07:33,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117509261] [2023-08-03 18:07:33,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:07:33,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:07:33,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:33,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:07:33,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:07:33,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-03 18:07:33,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 43 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 18:07:33,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:33,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-03 18:07:33,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:35,739 INFO L124 PetriNetUnfolderBase]: 18982/26404 cut-off events. [2023-08-03 18:07:35,739 INFO L125 PetriNetUnfolderBase]: For 2971/2971 co-relation queries the response was YES. [2023-08-03 18:07:35,858 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 162840 event pairs, 11848 based on Foata normal form. 27/26422 useless extension candidates. Maximal degree in co-relation 19334. Up to 23785 conditions per place. [2023-08-03 18:07:35,966 INFO L140 encePairwiseOnDemand]: 207/210 looper letters, 44 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-03 18:07:35,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 57 transitions, 279 flow [2023-08-03 18:07:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:07:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:07:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2023-08-03 18:07:35,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2023-08-03 18:07:35,969 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2023-08-03 18:07:35,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2023-08-03 18:07:35,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:07:35,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2023-08-03 18:07:35,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states 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 18:07:35,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 18:07:35,972 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 18:07:35,972 INFO L175 Difference]: Start difference. First operand has 66 places, 43 transitions, 163 flow. Second operand 4 states and 486 transitions. [2023-08-03 18:07:35,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 57 transitions, 279 flow [2023-08-03 18:07:35,976 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 18:07:35,977 INFO L231 Difference]: Finished difference. Result has 67 places, 42 transitions, 154 flow [2023-08-03 18:07:35,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 18:07:35,978 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2023-08-03 18:07:35,978 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 42 transitions, 154 flow [2023-08-03 18:07:35,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 18:07:35,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:35,979 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 18:07:35,988 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 18:07:36,185 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 18:07:36,186 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 18:07:36,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:36,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1687024373, now seen corresponding path program 1 times [2023-08-03 18:07:36,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:36,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49647665] [2023-08-03 18:07:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:36,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:36,246 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 18:07:36,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:36,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49647665] [2023-08-03 18:07:36,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49647665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:07:36,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934821862] [2023-08-03 18:07:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:36,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:07:36,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:07:36,250 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 18:07:36,252 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 18:07:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:36,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:07:36,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:07:36,356 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 18:07:36,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:07:36,376 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 18:07:36,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934821862] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:07:36,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:07:36,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:07:36,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803883555] [2023-08-03 18:07:36,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:07:36,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:07:36,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:36,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:07:36,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:07:36,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-03 18:07:36,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 42 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states 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 18:07:36,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:36,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-03 18:07:36,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:37,942 INFO L124 PetriNetUnfolderBase]: 17362/23452 cut-off events. [2023-08-03 18:07:37,942 INFO L125 PetriNetUnfolderBase]: For 2359/2359 co-relation queries the response was YES. [2023-08-03 18:07:38,056 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 132780 event pairs, 6886 based on Foata normal form. 243/23686 useless extension candidates. Maximal degree in co-relation 17468. Up to 11794 conditions per place. [2023-08-03 18:07:38,366 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 52 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-08-03 18:07:38,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 314 flow [2023-08-03 18:07:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:07:38,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:07:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 495 transitions. [2023-08-03 18:07:38,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2023-08-03 18:07:38,368 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 495 transitions. [2023-08-03 18:07:38,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 495 transitions. [2023-08-03 18:07:38,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:07:38,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 495 transitions. [2023-08-03 18:07:38,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 18:07:38,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 18:07:38,371 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 18:07:38,372 INFO L175 Difference]: Start difference. First operand has 67 places, 42 transitions, 154 flow. Second operand 4 states and 495 transitions. [2023-08-03 18:07:38,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 314 flow [2023-08-03 18:07:38,374 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 18:07:38,375 INFO L231 Difference]: Finished difference. Result has 69 places, 43 transitions, 168 flow [2023-08-03 18:07:38,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 18:07:38,376 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2023-08-03 18:07:38,376 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 43 transitions, 168 flow [2023-08-03 18:07:38,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states 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 18:07:38,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:38,376 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 18:07:38,388 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 18:07:38,583 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 18:07:38,583 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 18:07:38,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:38,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1734261307, now seen corresponding path program 1 times [2023-08-03 18:07:38,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:38,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095033012] [2023-08-03 18:07:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:38,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:38,767 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 18:07:38,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:38,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095033012] [2023-08-03 18:07:38,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095033012] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:07:38,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:07:38,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 18:07:38,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242613443] [2023-08-03 18:07:38,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:07:38,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:07:38,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:38,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:07:38,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:07:38,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 210 [2023-08-03 18:07:38,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 43 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 18:07:38,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:38,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 210 [2023-08-03 18:07:38,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:43,069 INFO L124 PetriNetUnfolderBase]: 48906/65232 cut-off events. [2023-08-03 18:07:43,069 INFO L125 PetriNetUnfolderBase]: For 32263/32263 co-relation queries the response was YES. [2023-08-03 18:07:43,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147795 conditions, 65232 events. 48906/65232 cut-off events. For 32263/32263 co-relation queries the response was YES. Maximal size of possible extension queue 3076. Compared 416710 event pairs, 21709 based on Foata normal form. 973/66169 useless extension candidates. Maximal degree in co-relation 147718. Up to 42971 conditions per place. [2023-08-03 18:07:43,600 INFO L140 encePairwiseOnDemand]: 200/210 looper letters, 58 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2023-08-03 18:07:43,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 75 transitions, 441 flow [2023-08-03 18:07:43,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:07:43,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:07:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-08-03 18:07:43,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2023-08-03 18:07:43,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-08-03 18:07:43,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-08-03 18:07:43,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:07:43,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-08-03 18:07:43,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 18:07:43,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:07:43,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:07:43,604 INFO L175 Difference]: Start difference. First operand has 69 places, 43 transitions, 168 flow. Second operand 3 states and 372 transitions. [2023-08-03 18:07:43,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 75 transitions, 441 flow [2023-08-03 18:07:43,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 75 transitions, 433 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 18:07:43,714 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 234 flow [2023-08-03 18:07:43,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2023-08-03 18:07:43,714 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2023-08-03 18:07:43,714 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 234 flow [2023-08-03 18:07:43,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 18:07:43,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:43,715 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 18:07:43,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 18:07:43,715 INFO L420 AbstractCegarLoop]: === Iteration 10 === 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 18:07:43,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:43,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1734261853, now seen corresponding path program 1 times [2023-08-03 18:07:43,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:43,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006325636] [2023-08-03 18:07:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:43,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:43,771 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 18:07:43,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:43,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006325636] [2023-08-03 18:07:43,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006325636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:07:43,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667575774] [2023-08-03 18:07:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:43,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:07:43,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:07:43,774 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 18:07:43,800 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 18:07:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:43,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:07:43,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:07:43,884 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 18:07:43,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:07:43,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667575774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:07:43,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:07:43,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:07:43,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680639089] [2023-08-03 18:07:43,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:07:43,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:07:43,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:43,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:07:43,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:07:43,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-03 18:07:43,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 234 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 18:07:43,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:43,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-03 18:07:43,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:46,814 INFO L124 PetriNetUnfolderBase]: 33828/44330 cut-off events. [2023-08-03 18:07:46,814 INFO L125 PetriNetUnfolderBase]: For 34418/34850 co-relation queries the response was YES. [2023-08-03 18:07:46,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126640 conditions, 44330 events. 33828/44330 cut-off events. For 34418/34850 co-relation queries the response was YES. Maximal size of possible extension queue 1880. Compared 248922 event pairs, 859 based on Foata normal form. 1774/45886 useless extension candidates. Maximal degree in co-relation 49295. Up to 27464 conditions per place. [2023-08-03 18:07:47,137 INFO L140 encePairwiseOnDemand]: 207/210 looper letters, 81 selfloop transitions, 3 changer transitions 0/95 dead transitions. [2023-08-03 18:07:47,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 95 transitions, 576 flow [2023-08-03 18:07:47,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:07:47,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:07:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 612 transitions. [2023-08-03 18:07:47,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5828571428571429 [2023-08-03 18:07:47,140 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 612 transitions. [2023-08-03 18:07:47,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 612 transitions. [2023-08-03 18:07:47,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:07:47,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 612 transitions. [2023-08-03 18:07:47,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:07:47,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 210.0) internal successors, (1260), 6 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 18:07:47,143 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 210.0) internal successors, (1260), 6 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 18:07:47,143 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 234 flow. Second operand 5 states and 612 transitions. [2023-08-03 18:07:47,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 95 transitions, 576 flow [2023-08-03 18:07:47,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 525 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 18:07:47,238 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 209 flow [2023-08-03 18:07:47,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-03 18:07:47,238 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2023-08-03 18:07:47,238 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 209 flow [2023-08-03 18:07:47,239 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 18:07:47,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:47,239 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 18:07:47,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 18:07:47,446 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 18:07:47,447 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 18:07:47,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:47,447 INFO L85 PathProgramCache]: Analyzing trace with hash 552577744, now seen corresponding path program 1 times [2023-08-03 18:07:47,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:47,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982565770] [2023-08-03 18:07:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:47,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:07:47,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:47,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982565770] [2023-08-03 18:07:47,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982565770] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:07:47,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823460863] [2023-08-03 18:07:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:47,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:07:47,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:07:47,625 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 18:07:47,655 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 18:07:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:47,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 18:07:47,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:07:47,759 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 18:07:47,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:07:47,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823460863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:07:47,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:07:47,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-03 18:07:47,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495560992] [2023-08-03 18:07:47,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:07:47,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:07:47,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:47,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:07:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:07:47,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 210 [2023-08-03 18:07:47,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:07:47,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:47,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 210 [2023-08-03 18:07:47,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:50,466 INFO L124 PetriNetUnfolderBase]: 31339/40572 cut-off events. [2023-08-03 18:07:50,466 INFO L125 PetriNetUnfolderBase]: For 34912/34912 co-relation queries the response was YES. [2023-08-03 18:07:50,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110027 conditions, 40572 events. 31339/40572 cut-off events. For 34912/34912 co-relation queries the response was YES. Maximal size of possible extension queue 1632. Compared 215276 event pairs, 6504 based on Foata normal form. 141/40483 useless extension candidates. Maximal degree in co-relation 68306. Up to 37257 conditions per place. [2023-08-03 18:07:50,767 INFO L140 encePairwiseOnDemand]: 202/210 looper letters, 65 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2023-08-03 18:07:50,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 511 flow [2023-08-03 18:07:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:07:50,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:07:50,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-03 18:07:50,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6015873015873016 [2023-08-03 18:07:50,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-03 18:07:50,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-03 18:07:50,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:07:50,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-03 18:07:50,770 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 18:07:50,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:07:50,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 18:07:50,772 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 209 flow. Second operand 3 states and 379 transitions. [2023-08-03 18:07:50,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 511 flow [2023-08-03 18:07:50,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 501 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:07:50,784 INFO L231 Difference]: Finished difference. Result has 71 places, 55 transitions, 251 flow [2023-08-03 18:07:50,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=251, PETRI_PLACES=71, PETRI_TRANSITIONS=55} [2023-08-03 18:07:50,784 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2023-08-03 18:07:50,784 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 55 transitions, 251 flow [2023-08-03 18:07:50,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:07:50,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:50,785 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 18:07:50,790 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 18:07:50,989 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 18:07:50,990 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 18:07:50,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:50,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1828173423, now seen corresponding path program 1 times [2023-08-03 18:07:50,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:50,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114559549] [2023-08-03 18:07:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:50,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:07:51,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:51,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114559549] [2023-08-03 18:07:51,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114559549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:07:51,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566807105] [2023-08-03 18:07:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:51,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:07:51,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:07:51,101 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 18:07:51,111 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 18:07:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:51,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-03 18:07:51,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:07:51,252 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 18:07:51,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:07:51,324 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 18:07:51,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566807105] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:07:51,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:07:51,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 6 [2023-08-03 18:07:51,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080772777] [2023-08-03 18:07:51,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:07:51,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 18:07:51,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:51,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 18:07:51,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-03 18:07:51,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 210 [2023-08-03 18:07:51,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 55 transitions, 251 flow. Second operand has 7 states, 7 states have (on average 105.14285714285714) internal successors, (736), 7 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:07:51,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:51,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 210 [2023-08-03 18:07:51,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:53,757 INFO L124 PetriNetUnfolderBase]: 25028/33142 cut-off events. [2023-08-03 18:07:53,757 INFO L125 PetriNetUnfolderBase]: For 32388/32388 co-relation queries the response was YES. [2023-08-03 18:07:53,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105878 conditions, 33142 events. 25028/33142 cut-off events. For 32388/32388 co-relation queries the response was YES. Maximal size of possible extension queue 1362. Compared 184518 event pairs, 625 based on Foata normal form. 1396/34537 useless extension candidates. Maximal degree in co-relation 69379. Up to 13668 conditions per place. [2023-08-03 18:07:54,311 INFO L140 encePairwiseOnDemand]: 193/210 looper letters, 160 selfloop transitions, 91 changer transitions 0/258 dead transitions. [2023-08-03 18:07:54,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 258 transitions, 1703 flow [2023-08-03 18:07:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-03 18:07:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-03 18:07:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1495 transitions. [2023-08-03 18:07:54,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-08-03 18:07:54,316 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1495 transitions. [2023-08-03 18:07:54,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1495 transitions. [2023-08-03 18:07:54,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:07:54,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1495 transitions. [2023-08-03 18:07:54,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 115.0) internal successors, (1495), 13 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states 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 18:07:54,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 210.0) internal successors, (2940), 14 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states 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 18:07:54,324 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 210.0) internal successors, (2940), 14 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states 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 18:07:54,324 INFO L175 Difference]: Start difference. First operand has 71 places, 55 transitions, 251 flow. Second operand 13 states and 1495 transitions. [2023-08-03 18:07:54,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 258 transitions, 1703 flow [2023-08-03 18:07:54,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 258 transitions, 1686 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:07:54,340 INFO L231 Difference]: Finished difference. Result has 90 places, 145 transitions, 975 flow [2023-08-03 18:07:54,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=975, PETRI_PLACES=90, PETRI_TRANSITIONS=145} [2023-08-03 18:07:54,341 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 36 predicate places. [2023-08-03 18:07:54,341 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 145 transitions, 975 flow [2023-08-03 18:07:54,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 105.14285714285714) internal successors, (736), 7 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:07:54,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:54,342 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 18:07:54,350 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 18:07:54,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-03 18:07:54,547 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 18:07:54,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:54,547 INFO L85 PathProgramCache]: Analyzing trace with hash 319506557, now seen corresponding path program 1 times [2023-08-03 18:07:54,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:54,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215720766] [2023-08-03 18:07:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:54,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:54,747 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 18:07:54,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:54,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215720766] [2023-08-03 18:07:54,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215720766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:07:54,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271893763] [2023-08-03 18:07:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:54,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:07:54,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:07:54,749 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 18:07:54,752 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 18:07:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:54,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-03 18:07:54,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:07:55,006 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 18:07:55,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:07:55,201 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 18:07:55,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271893763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:07:55,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:07:55,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2023-08-03 18:07:55,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128451117] [2023-08-03 18:07:55,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:07:55,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-03 18:07:55,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:55,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-03 18:07:55,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-08-03 18:07:55,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 210 [2023-08-03 18:07:55,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 145 transitions, 975 flow. Second operand has 15 states, 15 states have (on average 98.8) internal successors, (1482), 15 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states 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 18:07:55,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:55,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 210 [2023-08-03 18:07:55,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:08:08,074 INFO L124 PetriNetUnfolderBase]: 96250/126091 cut-off events. [2023-08-03 18:08:08,074 INFO L125 PetriNetUnfolderBase]: For 318875/318875 co-relation queries the response was YES. [2023-08-03 18:08:08,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536422 conditions, 126091 events. 96250/126091 cut-off events. For 318875/318875 co-relation queries the response was YES. Maximal size of possible extension queue 5425. Compared 797479 event pairs, 1822 based on Foata normal form. 959/127037 useless extension candidates. Maximal degree in co-relation 369451. Up to 48123 conditions per place. [2023-08-03 18:08:09,444 INFO L140 encePairwiseOnDemand]: 191/210 looper letters, 729 selfloop transitions, 736 changer transitions 265/1735 dead transitions. [2023-08-03 18:08:09,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 1735 transitions, 14941 flow [2023-08-03 18:08:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-03 18:08:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-03 18:08:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5557 transitions. [2023-08-03 18:08:09,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540038872691934 [2023-08-03 18:08:09,459 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5557 transitions. [2023-08-03 18:08:09,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5557 transitions. [2023-08-03 18:08:09,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:08:09,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5557 transitions. [2023-08-03 18:08:09,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 113.40816326530613) internal successors, (5557), 49 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states 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 18:08:09,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 210.0) internal successors, (10500), 50 states have internal predecessors, (10500), 0 states have call successors, (0), 0 states 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 18:08:09,494 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 210.0) internal successors, (10500), 50 states have internal predecessors, (10500), 0 states have call successors, (0), 0 states 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 18:08:09,494 INFO L175 Difference]: Start difference. First operand has 90 places, 145 transitions, 975 flow. Second operand 49 states and 5557 transitions. [2023-08-03 18:08:09,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 1735 transitions, 14941 flow [2023-08-03 18:08:48,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 1735 transitions, 14306 flow, removed 274 selfloop flow, removed 1 redundant places. [2023-08-03 18:08:48,603 INFO L231 Difference]: Finished difference. Result has 176 places, 976 transitions, 9585 flow [2023-08-03 18:08:48,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=9585, PETRI_PLACES=176, PETRI_TRANSITIONS=976} [2023-08-03 18:08:48,603 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 122 predicate places. [2023-08-03 18:08:48,604 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 976 transitions, 9585 flow [2023-08-03 18:08:48,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 98.8) internal successors, (1482), 15 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states 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 18:08:48,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:08:48,604 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 18:08:48,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 18:08:48,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-03 18:08:48,805 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 18:08:48,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:08:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash -49239160, now seen corresponding path program 1 times [2023-08-03 18:08:48,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:08:48,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834059425] [2023-08-03 18:08:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:08:48,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:08:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:08:48,950 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 18:08:48,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:08:48,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834059425] [2023-08-03 18:08:48,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834059425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:08:48,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041637801] [2023-08-03 18:08:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:08:48,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:08:48,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:08:48,953 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:08:48,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-03 18:08:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:08:49,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-03 18:08:49,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:08:49,199 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 18:08:49,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:08:49,404 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 18:08:49,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041637801] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:08:49,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:08:49,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 6, 6] total 14 [2023-08-03 18:08:49,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305702872] [2023-08-03 18:08:49,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:08:49,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 18:08:49,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:08:49,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 18:08:49,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2023-08-03 18:08:49,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 210 [2023-08-03 18:08:49,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 976 transitions, 9585 flow. Second operand has 16 states, 16 states have (on average 106.5) internal successors, (1704), 16 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states 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 18:08:49,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:08:49,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 210 [2023-08-03 18:08:49,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:10:19,550 INFO L124 PetriNetUnfolderBase]: 324068/438717 cut-off events. [2023-08-03 18:10:19,550 INFO L125 PetriNetUnfolderBase]: For 3820878/3831542 co-relation queries the response was YES. [2023-08-03 18:10:26,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2468728 conditions, 438717 events. 324068/438717 cut-off events. For 3820878/3831542 co-relation queries the response was YES. Maximal size of possible extension queue 20639. Compared 3411227 event pairs, 1647 based on Foata normal form. 6123/441486 useless extension candidates. Maximal degree in co-relation 2423532. Up to 108656 conditions per place. [2023-08-03 18:10:27,975 INFO L140 encePairwiseOnDemand]: 197/210 looper letters, 1138 selfloop transitions, 1851 changer transitions 844/3910 dead transitions. [2023-08-03 18:10:27,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 3910 transitions, 45705 flow [2023-08-03 18:10:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-03 18:10:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-03 18:10:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3659 transitions. [2023-08-03 18:10:27,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807936507936508 [2023-08-03 18:10:27,979 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3659 transitions. [2023-08-03 18:10:27,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3659 transitions. [2023-08-03 18:10:27,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:10:27,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3659 transitions. [2023-08-03 18:10:27,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 121.96666666666667) internal successors, (3659), 30 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states 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 18:10:27,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 210.0) internal successors, (6510), 31 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states 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 18:10:27,996 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 210.0) internal successors, (6510), 31 states have internal predecessors, (6510), 0 states have call successors, (0), 0 states 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 18:10:27,996 INFO L175 Difference]: Start difference. First operand has 176 places, 976 transitions, 9585 flow. Second operand 30 states and 3659 transitions. [2023-08-03 18:10:27,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 3910 transitions, 45705 flow Received shutdown request... [2023-08-03 18:20:34,437 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-03 18:20:34,437 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-03 18:20:35,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-03 18:20:35,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown