/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-lit_qw2004-2b_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 16:53:03,437 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 16:53:03,494 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 16:53:03,498 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 16:53:03,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 16:53:03,499 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 16:53:03,499 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 16:53:03,523 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 16:53:03,523 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 16:53:03,526 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 16:53:03,526 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 16:53:03,526 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 16:53:03,527 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 16:53:03,528 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 16:53:03,528 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 16:53:03,528 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 16:53:03,528 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 16:53:03,528 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 16:53:03,528 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 16:53:03,528 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 16:53:03,529 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 16:53:03,529 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 16:53:03,529 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 16:53:03,529 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 16:53:03,529 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 16:53:03,530 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 16:53:03,530 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 16:53:03,531 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 16:53:03,531 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 16:53:03,531 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 16:53:03,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:53:03,532 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 16:53:03,532 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 16:53:03,532 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 16:53:03,532 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 16:53:03,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 16:53:03,532 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 16:53:03,532 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 16:53:03,532 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 16:53:03,532 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 16:53:03,532 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 16:53:03,533 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 16:53:03,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 16:53:03,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 16:53:03,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 16:53:03,718 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 16:53:03,718 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 16:53:03,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-lit_qw2004-2b_bound2.i [2023-08-03 16:53:04,577 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 16:53:04,793 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 16:53:04,793 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-lit_qw2004-2b_bound2.i [2023-08-03 16:53:04,801 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8597c62a/d7b65a3989744f88aa4127237567730e/FLAG47f89192a [2023-08-03 16:53:04,813 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8597c62a/d7b65a3989744f88aa4127237567730e [2023-08-03 16:53:04,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 16:53:04,815 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 16:53:04,816 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 16:53:04,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 16:53:04,820 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 16:53:04,820 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:53:04" (1/1) ... [2023-08-03 16:53:04,821 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6de535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:04, skipping insertion in model container [2023-08-03 16:53:04,821 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:53:04" (1/1) ... [2023-08-03 16:53:04,854 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 16:53:05,089 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-lit_qw2004-2b_bound2.i[30003,30016] [2023-08-03 16:53:05,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:53:05,108 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 16:53:05,131 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-03 16:53:05,132 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-03 16:53:05,149 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-lit_qw2004-2b_bound2.i[30003,30016] [2023-08-03 16:53:05,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:53:05,182 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 16:53:05,182 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 16:53:05,186 INFO L206 MainTranslator]: Completed translation [2023-08-03 16:53:05,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:05 WrapperNode [2023-08-03 16:53:05,187 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 16:53:05,187 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 16:53:05,188 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 16:53:05,188 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 16:53:05,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:05" (1/1) ... [2023-08-03 16:53:05,203 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:05" (1/1) ... [2023-08-03 16:53:05,216 INFO L138 Inliner]: procedures = 175, calls = 36, calls flagged for inlining = 9, calls inlined = 10, statements flattened = 125 [2023-08-03 16:53:05,217 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 16:53:05,217 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 16:53:05,217 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 16:53:05,217 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 16:53:05,224 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:05" (1/1) ... [2023-08-03 16:53:05,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:05" (1/1) ... [2023-08-03 16:53:05,226 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:05" (1/1) ... [2023-08-03 16:53:05,226 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:05" (1/1) ... [2023-08-03 16:53:05,230 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:05" (1/1) ... [2023-08-03 16:53:05,232 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:05" (1/1) ... [2023-08-03 16:53:05,233 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:05" (1/1) ... [2023-08-03 16:53:05,233 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:05" (1/1) ... [2023-08-03 16:53:05,235 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 16:53:05,235 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 16:53:05,235 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 16:53:05,235 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 16:53:05,236 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:05" (1/1) ... [2023-08-03 16:53:05,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:53:05,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:53:05,266 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 16:53:05,267 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 16:53:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure BCSP_PnpStop [2023-08-03 16:53:05,291 INFO L138 BoogieDeclarations]: Found implementation of procedure BCSP_PnpStop [2023-08-03 16:53:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 16:53:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 16:53:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 16:53:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 16:53:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 16:53:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 16:53:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 16:53:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 16:53:05,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 16:53:05,294 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 16:53:05,383 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 16:53:05,384 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 16:53:05,496 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 16:53:05,510 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 16:53:05,510 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-03 16:53:05,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:53:05 BoogieIcfgContainer [2023-08-03 16:53:05,512 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 16:53:05,513 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 16:53:05,513 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 16:53:05,515 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 16:53:05,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 04:53:04" (1/3) ... [2023-08-03 16:53:05,516 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4943dc77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:53:05, skipping insertion in model container [2023-08-03 16:53:05,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:53:05" (2/3) ... [2023-08-03 16:53:05,516 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4943dc77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:53:05, skipping insertion in model container [2023-08-03 16:53:05,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:53:05" (3/3) ... [2023-08-03 16:53:05,517 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-lit_qw2004-2b_bound2.i [2023-08-03 16:53:05,522 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 16:53:05,527 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 16:53:05,527 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 16:53:05,528 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 16:53:05,559 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 16:53:05,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 110 transitions, 225 flow [2023-08-03 16:53:05,624 INFO L124 PetriNetUnfolderBase]: 12/167 cut-off events. [2023-08-03 16:53:05,625 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:53:05,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 167 events. 12/167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 357 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2023-08-03 16:53:05,629 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 110 transitions, 225 flow [2023-08-03 16:53:05,632 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 110 transitions, 225 flow [2023-08-03 16:53:05,634 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:53:05,663 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 110 transitions, 225 flow [2023-08-03 16:53:05,665 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 110 transitions, 225 flow [2023-08-03 16:53:05,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 110 transitions, 225 flow [2023-08-03 16:53:05,715 INFO L124 PetriNetUnfolderBase]: 12/167 cut-off events. [2023-08-03 16:53:05,715 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:53:05,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 167 events. 12/167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 357 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2023-08-03 16:53:05,718 INFO L119 LiptonReduction]: Number of co-enabled transitions 3402 [2023-08-03 16:53:07,662 INFO L134 LiptonReduction]: Checked pairs total: 4257 [2023-08-03 16:53:07,662 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-03 16:53:07,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:53:07,675 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;@232fa8ea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:53:07,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 16:53:07,677 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:53:07,677 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-08-03 16:53:07,677 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:53:07,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:07,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-03 16:53:07,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:53:07,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:07,681 INFO L85 PathProgramCache]: Analyzing trace with hash 443644, now seen corresponding path program 1 times [2023-08-03 16:53:07,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:07,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985347731] [2023-08-03 16:53:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:07,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:07,814 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 16:53:07,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:53:07,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985347731] [2023-08-03 16:53:07,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985347731] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:53:07,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:53:07,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 16:53:07,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718684853] [2023-08-03 16:53:07,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:53:07,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:53:07,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:53:07,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:53:07,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:53:07,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 232 [2023-08-03 16:53:07,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 16:53:07,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:53:07,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 232 [2023-08-03 16:53:07,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:53:07,897 INFO L124 PetriNetUnfolderBase]: 107/223 cut-off events. [2023-08-03 16:53:07,897 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:53:07,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 223 events. 107/223 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 894 event pairs, 25 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 415. Up to 118 conditions per place. [2023-08-03 16:53:07,899 INFO L140 encePairwiseOnDemand]: 228/232 looper letters, 23 selfloop transitions, 3 changer transitions 8/36 dead transitions. [2023-08-03 16:53:07,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 36 transitions, 145 flow [2023-08-03 16:53:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:53:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:53:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-03 16:53:07,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813218390804598 [2023-08-03 16:53:07,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-03 16:53:07,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-03 16:53:07,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:53:07,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-03 16:53:07,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 16:53:07,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 16:53:07,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 16:53:07,917 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 47 flow. Second operand 3 states and 335 transitions. [2023-08-03 16:53:07,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 36 transitions, 145 flow [2023-08-03 16:53:07,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 36 transitions, 145 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:53:07,920 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 57 flow [2023-08-03 16:53:07,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-03 16:53:07,923 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2023-08-03 16:53:07,923 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 57 flow [2023-08-03 16:53:07,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 16:53:07,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:07,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 16:53:07,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 16:53:07,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:53:07,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:07,925 INFO L85 PathProgramCache]: Analyzing trace with hash 426095747, now seen corresponding path program 1 times [2023-08-03 16:53:07,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:07,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259908947] [2023-08-03 16:53:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:07,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:07,955 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 16:53:07,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:53:07,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259908947] [2023-08-03 16:53:07,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259908947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:53:07,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:53:07,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 16:53:07,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596114916] [2023-08-03 16:53:07,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:53:07,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:53:07,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:53:07,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:53:07,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:53:07,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 232 [2023-08-03 16:53:07,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 16:53:07,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:53:07,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 232 [2023-08-03 16:53:07,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:53:07,993 INFO L124 PetriNetUnfolderBase]: 54/130 cut-off events. [2023-08-03 16:53:07,994 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-03 16:53:07,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 130 events. 54/130 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 526 event pairs, 0 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 264. Up to 107 conditions per place. [2023-08-03 16:53:07,995 INFO L140 encePairwiseOnDemand]: 229/232 looper letters, 22 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-03 16:53:07,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 26 transitions, 125 flow [2023-08-03 16:53:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:53:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:53:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-03 16:53:07,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46120689655172414 [2023-08-03 16:53:07,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-03 16:53:07,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-03 16:53:07,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:53:07,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-03 16:53:07,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states 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 16:53:07,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 16:53:08,000 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 states 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 16:53:08,000 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 3 states and 321 transitions. [2023-08-03 16:53:08,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 26 transitions, 125 flow [2023-08-03 16:53:08,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 26 transitions, 117 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 16:53:08,001 INFO L231 Difference]: Finished difference. Result has 23 places, 18 transitions, 59 flow [2023-08-03 16:53:08,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2023-08-03 16:53:08,001 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 2 predicate places. [2023-08-03 16:53:08,002 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 59 flow [2023-08-03 16:53:08,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 16:53:08,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:08,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 16:53:08,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 16:53:08,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:53:08,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:08,003 INFO L85 PathProgramCache]: Analyzing trace with hash 295626701, now seen corresponding path program 1 times [2023-08-03 16:53:08,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:08,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473076597] [2023-08-03 16:53:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:08,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:53:08,013 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 16:53:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:53:08,030 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 16:53:08,030 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 16:53:08,031 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 16:53:08,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-03 16:53:08,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 16:53:08,032 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-03 16:53:08,033 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 16:53:08,034 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 16:53:08,045 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 16:53:08,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 288 flow [2023-08-03 16:53:08,065 INFO L124 PetriNetUnfolderBase]: 19/257 cut-off events. [2023-08-03 16:53:08,065 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 16:53:08,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 257 events. 19/257 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 790 event pairs, 0 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-08-03 16:53:08,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 138 transitions, 288 flow [2023-08-03 16:53:08,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 138 transitions, 288 flow [2023-08-03 16:53:08,068 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:53:08,068 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 138 transitions, 288 flow [2023-08-03 16:53:08,068 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 138 transitions, 288 flow [2023-08-03 16:53:08,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 288 flow [2023-08-03 16:53:08,085 INFO L124 PetriNetUnfolderBase]: 19/257 cut-off events. [2023-08-03 16:53:08,085 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 16:53:08,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 257 events. 19/257 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 790 event pairs, 0 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-08-03 16:53:08,092 INFO L119 LiptonReduction]: Number of co-enabled transitions 8316 [2023-08-03 16:53:09,908 INFO L134 LiptonReduction]: Checked pairs total: 10678 [2023-08-03 16:53:09,908 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-08-03 16:53:09,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:53:09,912 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;@232fa8ea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:53:09,912 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 16:53:09,913 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:53:09,913 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-03 16:53:09,914 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:53:09,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:09,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-03 16:53:09,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:53:09,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:09,914 INFO L85 PathProgramCache]: Analyzing trace with hash 754365, now seen corresponding path program 1 times [2023-08-03 16:53:09,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:09,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124555213] [2023-08-03 16:53:09,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:09,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:09,944 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 16:53:09,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:53:09,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124555213] [2023-08-03 16:53:09,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124555213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:53:09,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:53:09,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 16:53:09,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638317873] [2023-08-03 16:53:09,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:53:09,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:53:09,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:53:09,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:53:09,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:53:09,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 282 [2023-08-03 16:53:09,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 70 flow. Second operand has 3 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 16:53:09,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:53:09,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 282 [2023-08-03 16:53:09,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:53:10,038 INFO L124 PetriNetUnfolderBase]: 697/1102 cut-off events. [2023-08-03 16:53:10,039 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-03 16:53:10,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2215 conditions, 1102 events. 697/1102 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4499 event pairs, 240 based on Foata normal form. 0/870 useless extension candidates. Maximal degree in co-relation 428. Up to 1069 conditions per place. [2023-08-03 16:53:10,042 INFO L140 encePairwiseOnDemand]: 277/282 looper letters, 26 selfloop transitions, 2 changer transitions 4/35 dead transitions. [2023-08-03 16:53:10,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 146 flow [2023-08-03 16:53:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:53:10,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:53:10,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-08-03 16:53:10,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48108747044917255 [2023-08-03 16:53:10,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-08-03 16:53:10,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-08-03 16:53:10,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:53:10,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-08-03 16:53:10,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 16:53:10,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 16:53:10,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 16:53:10,049 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 70 flow. Second operand 3 states and 407 transitions. [2023-08-03 16:53:10,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 146 flow [2023-08-03 16:53:10,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 144 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 16:53:10,051 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 70 flow [2023-08-03 16:53:10,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-03 16:53:10,053 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-08-03 16:53:10,053 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 70 flow [2023-08-03 16:53:10,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 16:53:10,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:10,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:53:10,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 16:53:10,056 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:53:10,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:10,056 INFO L85 PathProgramCache]: Analyzing trace with hash -285163406, now seen corresponding path program 1 times [2023-08-03 16:53:10,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:10,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859650708] [2023-08-03 16:53:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:10,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:10,101 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 16:53:10,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:53:10,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859650708] [2023-08-03 16:53:10,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859650708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:53:10,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887767830] [2023-08-03 16:53:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:10,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:53:10,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:53:10,104 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 16:53:10,134 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 16:53:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:10,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 16:53:10,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:53:10,203 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 16:53:10,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:53:10,216 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 16:53:10,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887767830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:53:10,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:53:10,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 16:53:10,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635559971] [2023-08-03 16:53:10,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:53:10,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:53:10,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:53:10,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:53:10,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:53:10,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 282 [2023-08-03 16:53:10,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states 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 16:53:10,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:53:10,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 282 [2023-08-03 16:53:10,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:53:10,309 INFO L124 PetriNetUnfolderBase]: 415/700 cut-off events. [2023-08-03 16:53:10,309 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-03 16:53:10,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1504 conditions, 700 events. 415/700 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2952 event pairs, 30 based on Foata normal form. 6/630 useless extension candidates. Maximal degree in co-relation 318. Up to 445 conditions per place. [2023-08-03 16:53:10,312 INFO L140 encePairwiseOnDemand]: 277/282 looper letters, 36 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-08-03 16:53:10,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 188 flow [2023-08-03 16:53:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 16:53:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 16:53:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 534 transitions. [2023-08-03 16:53:10,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734042553191489 [2023-08-03 16:53:10,314 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 534 transitions. [2023-08-03 16:53:10,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 534 transitions. [2023-08-03 16:53:10,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:53:10,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 534 transitions. [2023-08-03 16:53:10,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 16:53:10,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 282.0) internal successors, (1410), 5 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states 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 16:53:10,317 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 282.0) internal successors, (1410), 5 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states 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 16:53:10,317 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 70 flow. Second operand 4 states and 534 transitions. [2023-08-03 16:53:10,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 188 flow [2023-08-03 16:53:10,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 43 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:53:10,318 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 90 flow [2023-08-03 16:53:10,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-08-03 16:53:10,320 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-03 16:53:10,320 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 90 flow [2023-08-03 16:53:10,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states 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 16:53:10,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:10,320 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 16:53:10,327 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 16:53:10,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:53:10,527 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:53:10,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:10,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1055642079, now seen corresponding path program 1 times [2023-08-03 16:53:10,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:10,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769302145] [2023-08-03 16:53:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:10,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:10,615 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 16:53:10,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:53:10,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769302145] [2023-08-03 16:53:10,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769302145] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:53:10,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144094630] [2023-08-03 16:53:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:10,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:53:10,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:53:10,630 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 16:53:10,652 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 16:53:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:10,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 16:53:10,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:53:10,703 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 16:53:10,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:53:10,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144094630] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:53:10,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 16:53:10,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 16:53:10,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959682714] [2023-08-03 16:53:10,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:53:10,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:53:10,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:53:10,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:53:10,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 16:53:10,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 282 [2023-08-03 16:53:10,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 16:53:10,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:53:10,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 282 [2023-08-03 16:53:10,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:53:10,791 INFO L124 PetriNetUnfolderBase]: 349/592 cut-off events. [2023-08-03 16:53:10,792 INFO L125 PetriNetUnfolderBase]: For 258/258 co-relation queries the response was YES. [2023-08-03 16:53:10,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 592 events. 349/592 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2362 event pairs, 0 based on Foata normal form. 36/558 useless extension candidates. Maximal degree in co-relation 279. Up to 444 conditions per place. [2023-08-03 16:53:10,794 INFO L140 encePairwiseOnDemand]: 279/282 looper letters, 36 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2023-08-03 16:53:10,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 196 flow [2023-08-03 16:53:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:53:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:53:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 655 transitions. [2023-08-03 16:53:10,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645390070921986 [2023-08-03 16:53:10,796 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 655 transitions. [2023-08-03 16:53:10,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 655 transitions. [2023-08-03 16:53:10,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:53:10,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 655 transitions. [2023-08-03 16:53:10,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states 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 16:53:10,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 282.0) internal successors, (1692), 6 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:53:10,799 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 282.0) internal successors, (1692), 6 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:53:10,799 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 90 flow. Second operand 5 states and 655 transitions. [2023-08-03 16:53:10,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 196 flow [2023-08-03 16:53:10,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 41 transitions, 189 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 16:53:10,800 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 79 flow [2023-08-03 16:53:10,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=79, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-03 16:53:10,801 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-03 16:53:10,801 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 79 flow [2023-08-03 16:53:10,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 16:53:10,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:10,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 16:53:10,808 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 16:53:11,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-03 16:53:11,006 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:53:11,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1055640792, now seen corresponding path program 1 times [2023-08-03 16:53:11,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:11,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951408667] [2023-08-03 16:53:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:11,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:53:11,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:53:11,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951408667] [2023-08-03 16:53:11,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951408667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:53:11,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:53:11,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 16:53:11,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474075060] [2023-08-03 16:53:11,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:53:11,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:53:11,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:53:11,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:53:11,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:53:11,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 282 [2023-08-03 16:53:11,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 79 flow. Second operand has 3 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 16:53:11,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:53:11,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 282 [2023-08-03 16:53:11,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:53:11,125 INFO L124 PetriNetUnfolderBase]: 294/490 cut-off events. [2023-08-03 16:53:11,125 INFO L125 PetriNetUnfolderBase]: For 355/355 co-relation queries the response was YES. [2023-08-03 16:53:11,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1229 conditions, 490 events. 294/490 cut-off events. For 355/355 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1834 event pairs, 149 based on Foata normal form. 25/445 useless extension candidates. Maximal degree in co-relation 485. Up to 313 conditions per place. [2023-08-03 16:53:11,127 INFO L140 encePairwiseOnDemand]: 278/282 looper letters, 36 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2023-08-03 16:53:11,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 218 flow [2023-08-03 16:53:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:53:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:53:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2023-08-03 16:53:11,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846335697399527 [2023-08-03 16:53:11,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2023-08-03 16:53:11,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2023-08-03 16:53:11,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:53:11,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2023-08-03 16:53:11,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 16:53:11,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 16:53:11,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 16:53:11,131 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 79 flow. Second operand 3 states and 410 transitions. [2023-08-03 16:53:11,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 218 flow [2023-08-03 16:53:11,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 210 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 16:53:11,133 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 93 flow [2023-08-03 16:53:11,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-08-03 16:53:11,134 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-03 16:53:11,134 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 93 flow [2023-08-03 16:53:11,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 16:53:11,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:11,135 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:53:11,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 16:53:11,136 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:53:11,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1075578706, now seen corresponding path program 1 times [2023-08-03 16:53:11,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:11,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685298050] [2023-08-03 16:53:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:11,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 16:53:11,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:53:11,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685298050] [2023-08-03 16:53:11,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685298050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:53:11,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356242936] [2023-08-03 16:53:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:11,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:53:11,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:53:11,200 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 16:53:11,202 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 16:53:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:11,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 16:53:11,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:53:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:53:11,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:53:11,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356242936] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:53:11,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 16:53:11,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-03 16:53:11,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542626116] [2023-08-03 16:53:11,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:53:11,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:53:11,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:53:11,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:53:11,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:53:11,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 282 [2023-08-03 16:53:11,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 16:53:11,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:53:11,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 282 [2023-08-03 16:53:11,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:53:11,329 INFO L124 PetriNetUnfolderBase]: 324/559 cut-off events. [2023-08-03 16:53:11,330 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2023-08-03 16:53:11,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1488 conditions, 559 events. 324/559 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2293 event pairs, 225 based on Foata normal form. 11/493 useless extension candidates. Maximal degree in co-relation 918. Up to 434 conditions per place. [2023-08-03 16:53:11,332 INFO L140 encePairwiseOnDemand]: 280/282 looper letters, 22 selfloop transitions, 0 changer transitions 14/38 dead transitions. [2023-08-03 16:53:11,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 201 flow [2023-08-03 16:53:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:53:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:53:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-08-03 16:53:11,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48108747044917255 [2023-08-03 16:53:11,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-08-03 16:53:11,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-08-03 16:53:11,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:53:11,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-08-03 16:53:11,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 16:53:11,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 16:53:11,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 16:53:11,335 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 93 flow. Second operand 3 states and 407 transitions. [2023-08-03 16:53:11,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 201 flow [2023-08-03 16:53:11,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 38 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:53:11,337 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 86 flow [2023-08-03 16:53:11,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-08-03 16:53:11,338 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-03 16:53:11,338 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 86 flow [2023-08-03 16:53:11,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 16:53:11,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:11,338 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:53:11,345 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 16:53:11,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:53:11,543 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:53:11,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:11,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1460218279, now seen corresponding path program 1 times [2023-08-03 16:53:11,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:11,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721446925] [2023-08-03 16:53:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:11,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 16:53:11,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:53:11,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721446925] [2023-08-03 16:53:11,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721446925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:53:11,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229841904] [2023-08-03 16:53:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:11,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:53:11,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:53:11,579 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 16:53:11,581 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 16:53:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:11,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 16:53:11,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:53:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 16:53:11,650 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:53:11,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229841904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:53:11,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 16:53:11,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 16:53:11,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770525377] [2023-08-03 16:53:11,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:53:11,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:53:11,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:53:11,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:53:11,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:53:11,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 282 [2023-08-03 16:53:11,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 16:53:11,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:53:11,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 282 [2023-08-03 16:53:11,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:53:11,694 INFO L124 PetriNetUnfolderBase]: 223/401 cut-off events. [2023-08-03 16:53:11,694 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2023-08-03 16:53:11,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 998 conditions, 401 events. 223/401 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1670 event pairs, 84 based on Foata normal form. 35/407 useless extension candidates. Maximal degree in co-relation 990. Up to 389 conditions per place. [2023-08-03 16:53:11,695 INFO L140 encePairwiseOnDemand]: 279/282 looper letters, 23 selfloop transitions, 2 changer transitions 4/31 dead transitions. [2023-08-03 16:53:11,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 172 flow [2023-08-03 16:53:11,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:53:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:53:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-08-03 16:53:11,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47044917257683216 [2023-08-03 16:53:11,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-08-03 16:53:11,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-08-03 16:53:11,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:53:11,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-08-03 16:53:11,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states 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 16:53:11,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 16:53:11,699 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states 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 16:53:11,699 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 86 flow. Second operand 3 states and 398 transitions. [2023-08-03 16:53:11,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 172 flow [2023-08-03 16:53:11,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 170 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 16:53:11,700 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 102 flow [2023-08-03 16:53:11,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-03 16:53:11,702 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-08-03 16:53:11,702 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 102 flow [2023-08-03 16:53:11,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 16:53:11,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:11,702 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:53:11,709 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 16:53:11,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:53:11,909 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:53:11,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:11,909 INFO L85 PathProgramCache]: Analyzing trace with hash -762137281, now seen corresponding path program 2 times [2023-08-03 16:53:11,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:11,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609140862] [2023-08-03 16:53:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:11,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:53:11,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:53:11,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609140862] [2023-08-03 16:53:11,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609140862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:53:11,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:53:11,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 16:53:11,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582492560] [2023-08-03 16:53:11,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:53:11,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 16:53:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:53:11,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 16:53:11,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 16:53:11,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 282 [2023-08-03 16:53:11,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 16:53:11,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:53:11,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 282 [2023-08-03 16:53:11,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:53:12,016 INFO L124 PetriNetUnfolderBase]: 231/439 cut-off events. [2023-08-03 16:53:12,016 INFO L125 PetriNetUnfolderBase]: For 236/236 co-relation queries the response was YES. [2023-08-03 16:53:12,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1154 conditions, 439 events. 231/439 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2038 event pairs, 45 based on Foata normal form. 28/437 useless extension candidates. Maximal degree in co-relation 1145. Up to 299 conditions per place. [2023-08-03 16:53:12,018 INFO L140 encePairwiseOnDemand]: 277/282 looper letters, 35 selfloop transitions, 5 changer transitions 9/51 dead transitions. [2023-08-03 16:53:12,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 51 transitions, 292 flow [2023-08-03 16:53:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:53:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:53:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2023-08-03 16:53:12,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46382978723404256 [2023-08-03 16:53:12,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2023-08-03 16:53:12,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2023-08-03 16:53:12,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:53:12,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2023-08-03 16:53:12,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states 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 16:53:12,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 282.0) internal successors, (1692), 6 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:53:12,022 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 282.0) internal successors, (1692), 6 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:53:12,022 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 102 flow. Second operand 5 states and 654 transitions. [2023-08-03 16:53:12,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 51 transitions, 292 flow [2023-08-03 16:53:12,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:53:12,023 INFO L231 Difference]: Finished difference. Result has 43 places, 30 transitions, 137 flow [2023-08-03 16:53:12,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=43, PETRI_TRANSITIONS=30} [2023-08-03 16:53:12,023 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2023-08-03 16:53:12,024 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 30 transitions, 137 flow [2023-08-03 16:53:12,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 16:53:12,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:12,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:53:12,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 16:53:12,024 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:53:12,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash 2143275896, now seen corresponding path program 1 times [2023-08-03 16:53:12,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:12,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965404344] [2023-08-03 16:53:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:12,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:53:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:53:12,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:53:12,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965404344] [2023-08-03 16:53:12,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965404344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:53:12,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:53:12,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 16:53:12,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454801250] [2023-08-03 16:53:12,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:53:12,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 16:53:12,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:53:12,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 16:53:12,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 16:53:12,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 282 [2023-08-03 16:53:12,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 137 flow. Second operand has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 6 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 16:53:12,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:53:12,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 282 [2023-08-03 16:53:12,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:53:12,212 INFO L124 PetriNetUnfolderBase]: 433/816 cut-off events. [2023-08-03 16:53:12,213 INFO L125 PetriNetUnfolderBase]: For 594/594 co-relation queries the response was YES. [2023-08-03 16:53:12,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2384 conditions, 816 events. 433/816 cut-off events. For 594/594 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4028 event pairs, 127 based on Foata normal form. 3/791 useless extension candidates. Maximal degree in co-relation 2372. Up to 495 conditions per place. [2023-08-03 16:53:12,215 INFO L140 encePairwiseOnDemand]: 275/282 looper letters, 76 selfloop transitions, 12 changer transitions 4/93 dead transitions. [2023-08-03 16:53:12,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 93 transitions, 576 flow [2023-08-03 16:53:12,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 16:53:12,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 16:53:12,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 906 transitions. [2023-08-03 16:53:12,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45896656534954405 [2023-08-03 16:53:12,217 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 906 transitions. [2023-08-03 16:53:12,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 906 transitions. [2023-08-03 16:53:12,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:53:12,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 906 transitions. [2023-08-03 16:53:12,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 129.42857142857142) internal successors, (906), 7 states have internal predecessors, (906), 0 states have call successors, (0), 0 states 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 16:53:12,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 282.0) internal successors, (2256), 8 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states 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 16:53:12,221 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 282.0) internal successors, (2256), 8 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states 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 16:53:12,221 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 137 flow. Second operand 7 states and 906 transitions. [2023-08-03 16:53:12,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 93 transitions, 576 flow [2023-08-03 16:53:12,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 93 transitions, 576 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:53:12,224 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 228 flow [2023-08-03 16:53:12,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=228, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-08-03 16:53:12,224 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2023-08-03 16:53:12,225 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 228 flow [2023-08-03 16:53:12,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 6 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 16:53:12,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:53:12,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:53:12,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 16:53:12,225 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:53:12,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:53:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2073330024, now seen corresponding path program 2 times [2023-08-03 16:53:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:53:12,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790458158] [2023-08-03 16:53:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:53:12,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:53:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:53:12,236 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 16:53:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:53:12,250 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 16:53:12,251 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 16:53:12,251 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-03 16:53:12,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 16:53:12,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 16:53:12,253 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2023-08-03 16:53:12,255 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 16:53:12,255 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 16:53:12,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 04:53:12 BasicIcfg [2023-08-03 16:53:12,295 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 16:53:12,295 INFO L158 Benchmark]: Toolchain (without parser) took 7479.40ms. Allocated memory is still 522.2MB. Free memory was 480.6MB in the beginning and 245.7MB in the end (delta: 234.9MB). Peak memory consumption was 237.3MB. Max. memory is 16.0GB. [2023-08-03 16:53:12,295 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 341.8MB. Free memory was 291.4MB in the beginning and 291.3MB in the end (delta: 133.0kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 16:53:12,295 INFO L158 Benchmark]: CACSL2BoogieTranslator took 370.80ms. Allocated memory is still 522.2MB. Free memory was 480.2MB in the beginning and 460.4MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-03 16:53:12,295 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.32ms. Allocated memory is still 522.2MB. Free memory was 460.4MB in the beginning and 458.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 16:53:12,295 INFO L158 Benchmark]: Boogie Preprocessor took 17.61ms. Allocated memory is still 522.2MB. Free memory was 458.3MB in the beginning and 456.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 16:53:12,296 INFO L158 Benchmark]: RCFGBuilder took 276.92ms. Allocated memory is still 522.2MB. Free memory was 456.5MB in the beginning and 441.1MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-03 16:53:12,296 INFO L158 Benchmark]: TraceAbstraction took 6781.22ms. Allocated memory is still 522.2MB. Free memory was 440.5MB in the beginning and 245.7MB in the end (delta: 194.7MB). Peak memory consumption was 197.5MB. Max. memory is 16.0GB. [2023-08-03 16:53:12,297 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 341.8MB. Free memory was 291.4MB in the beginning and 291.3MB in the end (delta: 133.0kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 370.80ms. Allocated memory is still 522.2MB. Free memory was 480.2MB in the beginning and 460.4MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 29.32ms. Allocated memory is still 522.2MB. Free memory was 460.4MB in the beginning and 458.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 17.61ms. Allocated memory is still 522.2MB. Free memory was 458.3MB in the beginning and 456.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 276.92ms. Allocated memory is still 522.2MB. Free memory was 456.5MB in the beginning and 441.1MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 6781.22ms. Allocated memory is still 522.2MB. Free memory was 440.5MB in the beginning and 245.7MB in the end (delta: 194.7MB). Peak memory consumption was 197.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 106 PlacesBefore, 21 PlacesAfterwards, 110 TransitionsBefore, 21 TransitionsAfterwards, 3402 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 74 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 26 ConcurrentYvCompositions, 4 ChoiceCompositions, 122 TotalNumberOfCompositions, 4257 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3457, independent: 3373, independent conditional: 0, independent unconditional: 3373, dependent: 84, dependent conditional: 0, dependent unconditional: 84, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2103, independent: 2072, independent conditional: 0, independent unconditional: 2072, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3457, independent: 1301, independent conditional: 0, independent unconditional: 1301, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 2103, unknown conditional: 0, unknown unconditional: 2103] , Statistics on independence cache: Total cache size (in pairs): 67, Positive cache size: 56, Positive conditional cache size: 0, Positive unconditional cache size: 56, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 134 PlacesBefore, 30 PlacesAfterwards, 138 TransitionsBefore, 29 TransitionsAfterwards, 8316 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 92 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 29 ConcurrentYvCompositions, 5 ChoiceCompositions, 144 TotalNumberOfCompositions, 10678 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7929, independent: 7780, independent conditional: 0, independent unconditional: 7780, dependent: 149, dependent conditional: 0, dependent unconditional: 149, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4894, independent: 4847, independent conditional: 0, independent unconditional: 4847, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7929, independent: 2933, independent conditional: 0, independent unconditional: 2933, dependent: 102, dependent conditional: 0, dependent unconditional: 102, unknown: 4894, unknown conditional: 0, unknown unconditional: 4894] , Statistics on independence cache: Total cache size (in pairs): 132, Positive cache size: 115, Positive conditional cache size: 0, Positive unconditional cache size: 115, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 690]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L697] 0 volatile int stoppingFlag; [L698] 0 volatile int pendingIo; [L699] 0 volatile int stoppingEvent; [L700] 0 volatile int stopped; [L756] 0 pthread_t t[2]; [L757] 0 pendingIo = 1 [L758] 0 stoppingFlag = 0 [L759] 0 stoppingEvent = 0 [L760] 0 stopped = 0 [L761] 0 int asdf=0; VAL [asdf=0, pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0, t={3:0}] [L761] COND TRUE 0 asdf<2 [L761] FCALL, FORK 0 pthread_create(&t[asdf], 0, BCSP_PnpStop, 0) VAL [asdf=0, pendingIo=1, pthread_create(&t[asdf], 0, BCSP_PnpStop, 0)=-1, stopped=0, stoppingEvent=0, stoppingFlag=0, t={3:0}] [L761] 0 asdf++ VAL [asdf=1, pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0, t={3:0}] [L761] COND TRUE 0 asdf<2 [L761] FCALL, FORK 0 pthread_create(&t[asdf], 0, BCSP_PnpStop, 0) VAL [asdf=1, pendingIo=1, pthread_create(&t[asdf], 0, BCSP_PnpStop, 0)=0, stopped=0, stoppingEvent=0, stoppingFlag=0, t={3:0}] [L761] 0 asdf++ VAL [asdf=2, pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0, t={3:0}] [L761] COND FALSE 0 !(asdf<2) [L762] CALL 0 BCSP_PnpAdd(0) [L734] 0 int status; [L735] CALL, EXPR 0 BCSP_IoIncrement() [L703] 0 int lsf = stoppingFlag; [L705] COND FALSE 0 !(\read(lsf)) VAL [lsf=0, pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L745] 1 stoppingFlag = 1 [L747] CALL 1 BCSP_IoDecrement() [L725] 1 int pending; [L726] CALL, EXPR 1 dec() [L719] 1 pendingIo-- [L720] 1 int tmp = pendingIo; [L722] 1 return tmp; [L726] RET, EXPR 1 dec() [L726] 1 pending = dec() [L727] COND TRUE 1 pending == 0 [L729] 1 stoppingEvent = 1 VAL [pending=0, pendingIo=0, stopped=0, stoppingEvent=1, stoppingFlag=1] [L747] RET 1 BCSP_IoDecrement() [L749] 1 int lse = stoppingEvent; [L751] CALL 1 assume_abort_if_not(lse) [L686] COND FALSE 1 !(!cond) [L751] RET 1 assume_abort_if_not(lse) [L752] 1 stopped = 1 [L753] 1 return 0; [L709] 0 int lp = pendingIo; VAL [lp=0, lsf=0, pendingIo=0, stopped=1, stoppingEvent=1, stoppingFlag=1] [L712] 0 pendingIo = lp + 1 [L715] 0 return 0; [L735] RET, EXPR 0 BCSP_IoIncrement() [L735] 0 status = BCSP_IoIncrement() [L736] COND TRUE 0 status == 0 [L737] 0 int local_assertion = !stopped; [L738] CALL 0 __VERIFIER_assert(local_assertion) [L689] COND TRUE 0 !(cond) [L690] 0 reach_error() VAL [\old(cond)=0, cond=0, pendingIo=1, stopped=1, stoppingEvent=1, stoppingFlag=1] - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 130 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.5s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 49 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 30 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 83 IncrementalHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 9 mSDtfsCounter, 83 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=2, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 156 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.2s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 277 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 220 mSDsluCounter, 47 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 31 mSDsCounter, 23 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 647 IncrementalHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23 mSolverCounterUnsat, 16 mSDtfsCounter, 647 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=228occurred in iteration=8, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 167 NumberOfCodeBlocks, 167 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 143 ConstructedInterpolants, 0 QuantifiedInterpolants, 362 SizeOfPredicates, 3 NumberOfNonLiveVariables, 457 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 45/61 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-03 16:53:12,315 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 Received shutdown request...