/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_mix002.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 16:55:56,948 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 16:55:56,995 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 16:55:57,000 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 16:55:57,001 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 16:55:57,001 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 16:55:57,002 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 16:55:57,023 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 16:55:57,023 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 16:55:57,026 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 16:55:57,026 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 16:55:57,026 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 16:55:57,027 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 16:55:57,027 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 16:55:57,028 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 16:55:57,028 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 16:55:57,028 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 16:55:57,028 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 16:55:57,028 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 16:55:57,028 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 16:55:57,028 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 16:55:57,029 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 16:55:57,029 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 16:55:57,029 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 16:55:57,030 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 16:55:57,030 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 16:55:57,030 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 16:55:57,030 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 16:55:57,031 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 16:55:57,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 16:55:57,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:55:57,032 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 16:55:57,032 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 16:55:57,032 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 16:55:57,032 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 16:55:57,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 16:55:57,032 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 16:55:57,032 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 16:55:57,032 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 16:55:57,032 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 16:55:57,032 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 16:55:57,033 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 16:55:57,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 16:55:57,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 16:55:57,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 16:55:57,213 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 16:55:57,213 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 16:55:57,214 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix002.opt_bound2.i [2023-08-03 16:55:58,158 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 16:55:58,397 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 16:55:58,398 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix002.opt_bound2.i [2023-08-03 16:55:58,410 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1e85d195/6601ffc2a3384c8bacb312a1cf8e9cbb/FLAG3c74a22f6 [2023-08-03 16:55:58,421 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1e85d195/6601ffc2a3384c8bacb312a1cf8e9cbb [2023-08-03 16:55:58,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 16:55:58,423 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 16:55:58,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 16:55:58,424 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 16:55:58,432 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 16:55:58,432 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:55:58" (1/1) ... [2023-08-03 16:55:58,433 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2290edeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58, skipping insertion in model container [2023-08-03 16:55:58,433 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:55:58" (1/1) ... [2023-08-03 16:55:58,476 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 16:55:58,571 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_mix002.opt_bound2.i[944,957] [2023-08-03 16:55:58,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:55:58,757 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 16:55:58,764 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_mix002.opt_bound2.i[944,957] [2023-08-03 16:55:58,777 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 16:55:58,778 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 16:55:58,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:55:58,812 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 16:55:58,812 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 16:55:58,816 INFO L206 MainTranslator]: Completed translation [2023-08-03 16:55:58,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58 WrapperNode [2023-08-03 16:55:58,817 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 16:55:58,817 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 16:55:58,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 16:55:58,817 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 16:55:58,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58" (1/1) ... [2023-08-03 16:55:58,832 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58" (1/1) ... [2023-08-03 16:55:58,852 INFO L138 Inliner]: procedures = 176, calls = 62, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 177 [2023-08-03 16:55:58,853 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 16:55:58,853 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 16:55:58,853 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 16:55:58,853 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 16:55:58,859 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58" (1/1) ... [2023-08-03 16:55:58,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58" (1/1) ... [2023-08-03 16:55:58,861 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58" (1/1) ... [2023-08-03 16:55:58,862 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58" (1/1) ... [2023-08-03 16:55:58,869 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58" (1/1) ... [2023-08-03 16:55:58,871 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58" (1/1) ... [2023-08-03 16:55:58,872 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58" (1/1) ... [2023-08-03 16:55:58,873 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58" (1/1) ... [2023-08-03 16:55:58,875 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 16:55:58,877 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 16:55:58,877 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 16:55:58,877 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 16:55:58,878 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58" (1/1) ... [2023-08-03 16:55:58,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:55:58,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:55:58,899 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 16:55:58,900 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 16:55:58,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 16:55:58,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 16:55:58,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 16:55:58,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 16:55:58,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 16:55:58,927 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 16:55:58,927 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 16:55:58,928 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 16:55:58,928 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 16:55:58,928 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 16:55:58,928 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 16:55:58,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 16:55:58,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 16:55:58,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 16:55:58,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 16:55:58,929 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 16:55:59,022 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 16:55:59,023 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 16:55:59,214 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 16:55:59,321 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 16:55:59,322 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 16:55:59,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:55:59 BoogieIcfgContainer [2023-08-03 16:55:59,325 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 16:55:59,326 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 16:55:59,327 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 16:55:59,329 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 16:55:59,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 04:55:58" (1/3) ... [2023-08-03 16:55:59,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652ce411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:55:59, skipping insertion in model container [2023-08-03 16:55:59,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:55:58" (2/3) ... [2023-08-03 16:55:59,331 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652ce411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:55:59, skipping insertion in model container [2023-08-03 16:55:59,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:55:59" (3/3) ... [2023-08-03 16:55:59,331 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix002.opt_bound2.i [2023-08-03 16:55:59,336 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 16:55:59,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 16:55:59,342 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 16:55:59,342 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 16:55:59,389 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 16:55:59,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 136 transitions, 287 flow [2023-08-03 16:55:59,539 INFO L124 PetriNetUnfolderBase]: 30/461 cut-off events. [2023-08-03 16:55:59,540 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:55:59,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 30/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2047 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2023-08-03 16:55:59,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 136 transitions, 287 flow [2023-08-03 16:55:59,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 136 transitions, 287 flow [2023-08-03 16:55:59,551 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:55:59,556 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 136 transitions, 287 flow [2023-08-03 16:55:59,558 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 136 transitions, 287 flow [2023-08-03 16:55:59,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 136 transitions, 287 flow [2023-08-03 16:55:59,594 INFO L124 PetriNetUnfolderBase]: 30/461 cut-off events. [2023-08-03 16:55:59,594 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:55:59,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 30/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2047 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2023-08-03 16:55:59,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 2944 [2023-08-03 16:56:02,660 INFO L134 LiptonReduction]: Checked pairs total: 7596 [2023-08-03 16:56:02,660 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-03 16:56:02,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:56:02,673 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;@478a7c19, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:56:02,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 16:56:02,676 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:56:02,676 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-03 16:56:02,677 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:56:02,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:56:02,677 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 16:56:02,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 16:56:02,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:56:02,680 INFO L85 PathProgramCache]: Analyzing trace with hash 595420942, now seen corresponding path program 1 times [2023-08-03 16:56:02,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:56:02,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672598576] [2023-08-03 16:56:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:56:02,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:56:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:56:02,756 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 16:56:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:56:02,796 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 16:56:02,797 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 16:56:02,797 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-03 16:56:02,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-03 16:56:02,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-03 16:56:02,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2023-08-03 16:56:02,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2023-08-03 16:56:02,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-03 16:56:02,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 16:56:02,799 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 16:56:02,801 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 16:56:02,801 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 16:56:02,822 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 16:56:02,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 16:56:02,939 INFO L124 PetriNetUnfolderBase]: 93/1418 cut-off events. [2023-08-03 16:56:02,940 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 16:56:02,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 1418 events. 93/1418 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9840 event pairs, 0 based on Foata normal form. 0/1241 useless extension candidates. Maximal degree in co-relation 1023. Up to 54 conditions per place. [2023-08-03 16:56:02,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 16:56:02,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 163 transitions, 362 flow [2023-08-03 16:56:02,948 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:56:02,948 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 163 transitions, 362 flow [2023-08-03 16:56:02,949 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 163 transitions, 362 flow [2023-08-03 16:56:02,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 16:56:03,070 INFO L124 PetriNetUnfolderBase]: 93/1418 cut-off events. [2023-08-03 16:56:03,070 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 16:56:03,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 1418 events. 93/1418 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9840 event pairs, 0 based on Foata normal form. 0/1241 useless extension candidates. Maximal degree in co-relation 1023. Up to 54 conditions per place. [2023-08-03 16:56:03,088 INFO L119 LiptonReduction]: Number of co-enabled transitions 7180 [2023-08-03 16:56:05,909 INFO L134 LiptonReduction]: Checked pairs total: 26295 [2023-08-03 16:56:05,909 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-03 16:56:05,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:56:05,912 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;@478a7c19, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:56:05,912 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-03 16:56:05,914 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:56:05,914 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-03 16:56:05,915 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:56:05,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:56:05,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 16:56:05,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:56:05,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:56:05,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1245573843, now seen corresponding path program 1 times [2023-08-03 16:56:05,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:56:05,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380440904] [2023-08-03 16:56:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:56:05,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:56:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:56:06,000 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 16:56:06,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:56:06,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380440904] [2023-08-03 16:56:06,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380440904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:56:06,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:56:06,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 16:56:06,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458683142] [2023-08-03 16:56:06,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:56:06,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:56:06,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:56:06,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:56:06,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:56:06,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 285 [2023-08-03 16:56:06,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:56:06,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:56:06,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 285 [2023-08-03 16:56:06,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:56:43,321 INFO L124 PetriNetUnfolderBase]: 378842/494972 cut-off events. [2023-08-03 16:56:43,321 INFO L125 PetriNetUnfolderBase]: For 5316/5316 co-relation queries the response was YES. [2023-08-03 16:56:44,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978253 conditions, 494972 events. 378842/494972 cut-off events. For 5316/5316 co-relation queries the response was YES. Maximal size of possible extension queue 18730. Compared 3711892 event pairs, 313476 based on Foata normal form. 10836/438141 useless extension candidates. Maximal degree in co-relation 282500. Up to 476892 conditions per place. [2023-08-03 16:56:46,068 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 43 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-03 16:56:46,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 61 transitions, 248 flow [2023-08-03 16:56:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:56:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:56:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2023-08-03 16:56:46,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321637426900585 [2023-08-03 16:56:46,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2023-08-03 16:56:46,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2023-08-03 16:56:46,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:56:46,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2023-08-03 16:56:46,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:56:46,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:56:46,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:56:46,089 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 152 flow. Second operand 3 states and 455 transitions. [2023-08-03 16:56:46,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 61 transitions, 248 flow [2023-08-03 16:56:46,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 61 transitions, 242 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 16:56:46,102 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 156 flow [2023-08-03 16:56:46,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2023-08-03 16:56:46,105 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-08-03 16:56:46,105 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 156 flow [2023-08-03 16:56:46,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:56:46,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:56:46,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:56:46,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 16:56:46,106 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:56:46,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:56:46,106 INFO L85 PathProgramCache]: Analyzing trace with hash 8884637, now seen corresponding path program 1 times [2023-08-03 16:56:46,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:56:46,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593847238] [2023-08-03 16:56:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:56:46,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:56:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:56:46,158 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 16:56:46,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:56:46,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593847238] [2023-08-03 16:56:46,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593847238] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:56:46,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017871208] [2023-08-03 16:56:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:56:46,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:56:46,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:56:46,173 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 16:56:46,181 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 16:56:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:56:46,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 16:56:46,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:56:46,277 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 16:56:46,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:56:46,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017871208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:56:46,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 16:56:46,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 16:56:46,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202298833] [2023-08-03 16:56:46,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:56:46,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:56:46,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:56:46,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:56:46,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:56:46,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 285 [2023-08-03 16:56:46,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:56:46,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:56:46,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 285 [2023-08-03 16:56:46,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:57:20,682 INFO L124 PetriNetUnfolderBase]: 366838/477931 cut-off events. [2023-08-03 16:57:20,682 INFO L125 PetriNetUnfolderBase]: For 4347/4347 co-relation queries the response was YES. [2023-08-03 16:57:21,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944459 conditions, 477931 events. 366838/477931 cut-off events. For 4347/4347 co-relation queries the response was YES. Maximal size of possible extension queue 18451. Compared 3542606 event pairs, 296770 based on Foata normal form. 0/417453 useless extension candidates. Maximal degree in co-relation 944420. Up to 460105 conditions per place. [2023-08-03 16:57:23,221 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 49 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-03 16:57:23,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 67 transitions, 276 flow [2023-08-03 16:57:23,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:57:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:57:23,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-08-03 16:57:23,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5368421052631579 [2023-08-03 16:57:23,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-08-03 16:57:23,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-08-03 16:57:23,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:57:23,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-08-03 16:57:23,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:57:23,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:57:23,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:57:23,227 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 156 flow. Second operand 3 states and 459 transitions. [2023-08-03 16:57:23,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 67 transitions, 276 flow [2023-08-03 16:57:23,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 67 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:57:23,228 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 166 flow [2023-08-03 16:57:23,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2023-08-03 16:57:23,229 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 5 predicate places. [2023-08-03 16:57:23,229 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 166 flow [2023-08-03 16:57:23,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:57:23,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:57:23,229 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 16:57:23,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 16:57:23,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:57:23,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:57:23,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:57:23,435 INFO L85 PathProgramCache]: Analyzing trace with hash -18084764, now seen corresponding path program 1 times [2023-08-03 16:57:23,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:57:23,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421260279] [2023-08-03 16:57:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:57:23,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:57:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:57:23,508 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 16:57:23,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:57:23,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421260279] [2023-08-03 16:57:23,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421260279] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:57:23,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831512091] [2023-08-03 16:57:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:57:23,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:57:23,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:57:23,510 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 16:57:23,516 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 16:57:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:57:23,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 16:57:23,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:57:23,606 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 16:57:23,606 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:57:23,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831512091] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:57:23,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 16:57:23,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 16:57:23,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184542287] [2023-08-03 16:57:23,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:57:23,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:57:23,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:57:23,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:57:23,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 16:57:23,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 285 [2023-08-03 16:57:23,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:57:23,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:57:23,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 285 [2023-08-03 16:57:23,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:57:57,607 INFO L124 PetriNetUnfolderBase]: 366826/477607 cut-off events. [2023-08-03 16:57:57,607 INFO L125 PetriNetUnfolderBase]: For 4659/4659 co-relation queries the response was YES. [2023-08-03 16:57:58,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944637 conditions, 477607 events. 366826/477607 cut-off events. For 4659/4659 co-relation queries the response was YES. Maximal size of possible extension queue 18571. Compared 3554745 event pairs, 257856 based on Foata normal form. 9/417744 useless extension candidates. Maximal degree in co-relation 273356. Up to 460209 conditions per place. [2023-08-03 16:58:00,152 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 47 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-08-03 16:58:00,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 66 transitions, 285 flow [2023-08-03 16:58:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:58:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:58:00,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 726 transitions. [2023-08-03 16:58:00,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094736842105263 [2023-08-03 16:58:00,154 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 726 transitions. [2023-08-03 16:58:00,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 726 transitions. [2023-08-03 16:58:00,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:58:00,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 726 transitions. [2023-08-03 16:58:00,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:00,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:00,158 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:00,158 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 166 flow. Second operand 5 states and 726 transitions. [2023-08-03 16:58:00,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 66 transitions, 285 flow [2023-08-03 16:58:00,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 281 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 16:58:00,161 INFO L231 Difference]: Finished difference. Result has 78 places, 59 transitions, 182 flow [2023-08-03 16:58:00,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=78, PETRI_TRANSITIONS=59} [2023-08-03 16:58:00,161 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 8 predicate places. [2023-08-03 16:58:00,161 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 59 transitions, 182 flow [2023-08-03 16:58:00,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:00,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:58:00,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:58:00,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 16:58:00,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 16:58:00,366 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:58:00,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:58:00,366 INFO L85 PathProgramCache]: Analyzing trace with hash -108665489, now seen corresponding path program 1 times [2023-08-03 16:58:00,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:58:00,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556507110] [2023-08-03 16:58:00,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:58:00,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:58:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:58:00,412 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 16:58:00,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:58:00,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556507110] [2023-08-03 16:58:00,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556507110] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:58:00,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431067938] [2023-08-03 16:58:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:58:00,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:58:00,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:58:00,415 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 16:58:00,418 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 16:58:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:58:00,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 16:58:00,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:58:00,506 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 16:58:00,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:58:00,519 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 16:58:00,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431067938] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:58:00,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:58:00,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 16:58:00,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043767368] [2023-08-03 16:58:00,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:58:00,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:58:00,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:58:00,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:58:00,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:58:00,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 285 [2023-08-03 16:58:00,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 59 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:00,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:58:00,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 285 [2023-08-03 16:58:00,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:58:26,970 INFO L124 PetriNetUnfolderBase]: 286798/369895 cut-off events. [2023-08-03 16:58:26,970 INFO L125 PetriNetUnfolderBase]: For 3559/3559 co-relation queries the response was YES. [2023-08-03 16:58:27,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731862 conditions, 369895 events. 286798/369895 cut-off events. For 3559/3559 co-relation queries the response was YES. Maximal size of possible extension queue 15182. Compared 2648228 event pairs, 193396 based on Foata normal form. 3/324993 useless extension candidates. Maximal degree in co-relation 259500. Up to 356836 conditions per place. [2023-08-03 16:58:28,858 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 47 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-08-03 16:58:28,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 65 transitions, 288 flow [2023-08-03 16:58:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 16:58:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 16:58:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 590 transitions. [2023-08-03 16:58:28,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175438596491229 [2023-08-03 16:58:28,860 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 590 transitions. [2023-08-03 16:58:28,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 590 transitions. [2023-08-03 16:58:28,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:58:28,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 590 transitions. [2023-08-03 16:58:28,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:28,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:28,863 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:28,863 INFO L175 Difference]: Start difference. First operand has 78 places, 59 transitions, 182 flow. Second operand 4 states and 590 transitions. [2023-08-03 16:58:28,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 65 transitions, 288 flow [2023-08-03 16:58:28,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 65 transitions, 283 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 16:58:28,865 INFO L231 Difference]: Finished difference. Result has 79 places, 58 transitions, 173 flow [2023-08-03 16:58:28,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=79, PETRI_TRANSITIONS=58} [2023-08-03 16:58:28,866 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 9 predicate places. [2023-08-03 16:58:28,866 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 58 transitions, 173 flow [2023-08-03 16:58:28,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:28,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:58:28,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:58:28,879 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 16:58:29,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:58:29,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 16:58:29,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:58:29,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1727873128, now seen corresponding path program 1 times [2023-08-03 16:58:29,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:58:29,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880922480] [2023-08-03 16:58:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:58:29,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:58:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:58:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:58:29,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:58:29,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880922480] [2023-08-03 16:58:29,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880922480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:58:29,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247567617] [2023-08-03 16:58:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:58:29,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:58:29,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:58:29,123 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 16:58:29,125 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 16:58:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:58:29,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 16:58:29,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:58:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:58:29,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:58:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:58:29,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247567617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:58:29,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:58:29,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 16:58:29,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346469905] [2023-08-03 16:58:29,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:58:29,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:58:29,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:58:29,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:58:29,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:58:29,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 285 [2023-08-03 16:58:29,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 58 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:58:29,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:58:29,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 285 [2023-08-03 16:58:29,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand