/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/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 16:03:13,883 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 16:03:13,949 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 16:03:13,952 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 16:03:13,952 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 16:03:13,952 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 16:03:13,952 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 16:03:13,970 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 16:03:13,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 16:03:13,973 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 16:03:13,974 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 16:03:13,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 16:03:13,975 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 16:03:13,975 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 16:03:13,976 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 16:03:13,976 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 16:03:13,976 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 16:03:13,976 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 16:03:13,977 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 16:03:13,977 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 16:03:13,977 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 16:03:13,977 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 16:03:13,977 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 16:03:13,977 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 16:03:13,978 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 16:03:13,979 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 16:03:13,979 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 16:03:13,979 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 16:03:13,979 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 16:03:13,980 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 16:03:13,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:03:13,980 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 16:03:13,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 16:03:13,981 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 16:03:13,981 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 16:03:13,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 16:03:13,981 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 16:03:13,981 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 16:03:13,981 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 16:03:13,981 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 16:03:13,981 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 16:03:13,982 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 16:03:14,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 16:03:14,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 16:03:14,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 16:03:14,165 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 16:03:14,165 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 16:03:14,166 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i [2023-08-03 16:03:15,077 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 16:03:15,308 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 16:03:15,309 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i [2023-08-03 16:03:15,319 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bc009bed/d5677941d5be417e850aec1f4d08dd48/FLAGe71ab295c [2023-08-03 16:03:15,329 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bc009bed/d5677941d5be417e850aec1f4d08dd48 [2023-08-03 16:03:15,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 16:03:15,331 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 16:03:15,332 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 16:03:15,332 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 16:03:15,334 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 16:03:15,335 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:03:15" (1/1) ... [2023-08-03 16:03:15,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58760b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15, skipping insertion in model container [2023-08-03 16:03:15,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:03:15" (1/1) ... [2023-08-03 16:03:15,374 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 16:03:15,473 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i[1105,1118] [2023-08-03 16:03:15,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:03:15,552 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 16:03:15,560 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i[1105,1118] [2023-08-03 16:03:15,565 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-03 16:03:15,566 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-03 16:03:15,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:03:15,602 INFO L206 MainTranslator]: Completed translation [2023-08-03 16:03:15,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15 WrapperNode [2023-08-03 16:03:15,602 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 16:03:15,603 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 16:03:15,603 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 16:03:15,603 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 16:03:15,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15" (1/1) ... [2023-08-03 16:03:15,622 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15" (1/1) ... [2023-08-03 16:03:15,641 INFO L138 Inliner]: procedures = 162, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-08-03 16:03:15,642 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 16:03:15,643 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 16:03:15,643 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 16:03:15,643 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 16:03:15,648 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15" (1/1) ... [2023-08-03 16:03:15,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15" (1/1) ... [2023-08-03 16:03:15,658 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15" (1/1) ... [2023-08-03 16:03:15,659 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15" (1/1) ... [2023-08-03 16:03:15,666 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15" (1/1) ... [2023-08-03 16:03:15,668 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15" (1/1) ... [2023-08-03 16:03:15,669 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15" (1/1) ... [2023-08-03 16:03:15,670 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15" (1/1) ... [2023-08-03 16:03:15,671 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 16:03:15,672 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 16:03:15,672 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 16:03:15,672 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 16:03:15,672 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15" (1/1) ... [2023-08-03 16:03:15,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:03:15,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:03:15,703 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 16:03:15,708 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 16:03:15,739 INFO L130 BoogieDeclarations]: Found specification of procedure worker [2023-08-03 16:03:15,739 INFO L138 BoogieDeclarations]: Found implementation of procedure worker [2023-08-03 16:03:15,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 16:03:15,739 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 16:03:15,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 16:03:15,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 16:03:15,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 16:03:15,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 16:03:15,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 16:03:15,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 16:03:15,742 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 16:03:15,829 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 16:03:15,831 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 16:03:15,989 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 16:03:15,994 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 16:03:15,994 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 16:03:15,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:03:15 BoogieIcfgContainer [2023-08-03 16:03:15,996 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 16:03:15,998 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 16:03:15,999 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 16:03:16,001 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 16:03:16,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 04:03:15" (1/3) ... [2023-08-03 16:03:16,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2f10dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:03:16, skipping insertion in model container [2023-08-03 16:03:16,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:15" (2/3) ... [2023-08-03 16:03:16,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2f10dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:03:16, skipping insertion in model container [2023-08-03 16:03:16,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:03:15" (3/3) ... [2023-08-03 16:03:16,003 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i [2023-08-03 16:03:16,011 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 16:03:16,018 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 16:03:16,019 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 16:03:16,019 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 16:03:16,078 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 16:03:16,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 74 transitions, 153 flow [2023-08-03 16:03:16,137 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-03 16:03:16,137 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:03:16,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2023-08-03 16:03:16,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 74 transitions, 153 flow [2023-08-03 16:03:16,143 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 74 transitions, 153 flow [2023-08-03 16:03:16,146 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:03:16,152 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 74 transitions, 153 flow [2023-08-03 16:03:16,154 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 74 transitions, 153 flow [2023-08-03 16:03:16,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 74 transitions, 153 flow [2023-08-03 16:03:16,169 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-03 16:03:16,169 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:03:16,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2023-08-03 16:03:16,170 INFO L119 LiptonReduction]: Number of co-enabled transitions 918 [2023-08-03 16:03:18,268 INFO L134 LiptonReduction]: Checked pairs total: 675 [2023-08-03 16:03:18,269 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-03 16:03:18,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:03:18,283 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;@75686ae3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:03:18,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 16:03:18,286 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:03:18,286 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-03 16:03:18,286 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:03:18,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:18,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 16:03:18,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 16:03:18,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:18,290 INFO L85 PathProgramCache]: Analyzing trace with hash 292003624, now seen corresponding path program 1 times [2023-08-03 16:03:18,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:18,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917203900] [2023-08-03 16:03:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:18,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:18,407 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 16:03:18,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:18,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917203900] [2023-08-03 16:03:18,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917203900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:03:18,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:03:18,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 16:03:18,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995581626] [2023-08-03 16:03:18,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:03:18,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-03 16:03:18,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:18,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-03 16:03:18,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-03 16:03:18,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 148 [2023-08-03 16:03:18,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 2 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:18,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:18,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 148 [2023-08-03 16:03:18,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:18,469 INFO L124 PetriNetUnfolderBase]: 6/18 cut-off events. [2023-08-03 16:03:18,470 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:03:18,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 18 events. 6/18 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 2 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 25. Up to 17 conditions per place. [2023-08-03 16:03:18,471 INFO L140 encePairwiseOnDemand]: 146/148 looper letters, 5 selfloop transitions, 0 changer transitions 1/8 dead transitions. [2023-08-03 16:03:18,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 33 flow [2023-08-03 16:03:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-03 16:03:18,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-03 16:03:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 144 transitions. [2023-08-03 16:03:18,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2023-08-03 16:03:18,481 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 144 transitions. [2023-08-03 16:03:18,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 144 transitions. [2023-08-03 16:03:18,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:18,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 144 transitions. [2023-08-03 16:03:18,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:18,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:18,488 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:18,491 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 2 states and 144 transitions. [2023-08-03 16:03:18,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 33 flow [2023-08-03 16:03:18,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 33 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:03:18,493 INFO L231 Difference]: Finished difference. Result has 11 places, 7 transitions, 19 flow [2023-08-03 16:03:18,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=19, PETRI_PLACES=11, PETRI_TRANSITIONS=7} [2023-08-03 16:03:18,497 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-08-03 16:03:18,497 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 7 transitions, 19 flow [2023-08-03 16:03:18,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:18,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:18,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 16:03:18,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 16:03:18,498 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 16:03:18,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:18,499 INFO L85 PathProgramCache]: Analyzing trace with hash 462259856, now seen corresponding path program 1 times [2023-08-03 16:03:18,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:18,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806087615] [2023-08-03 16:03:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:18,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:03:18,540 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 16:03:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:03:18,586 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 16:03:18,586 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 16:03:18,587 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 16:03:18,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 16:03:18,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-03 16:03:18,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 16:03:18,589 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 16:03:18,590 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 16:03:18,590 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 16:03:18,601 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 16:03:18,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 216 flow [2023-08-03 16:03:18,619 INFO L124 PetriNetUnfolderBase]: 11/129 cut-off events. [2023-08-03 16:03:18,619 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 16:03:18,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 129 events. 11/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2023-08-03 16:03:18,620 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 102 transitions, 216 flow [2023-08-03 16:03:18,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 102 transitions, 216 flow [2023-08-03 16:03:18,621 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:03:18,621 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 102 transitions, 216 flow [2023-08-03 16:03:18,621 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 102 transitions, 216 flow [2023-08-03 16:03:18,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 216 flow [2023-08-03 16:03:18,663 INFO L124 PetriNetUnfolderBase]: 11/129 cut-off events. [2023-08-03 16:03:18,663 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 16:03:18,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 129 events. 11/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2023-08-03 16:03:18,665 INFO L119 LiptonReduction]: Number of co-enabled transitions 3348 [2023-08-03 16:03:20,460 INFO L134 LiptonReduction]: Checked pairs total: 8072 [2023-08-03 16:03:20,460 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-03 16:03:20,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:03:20,462 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;@75686ae3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:03:20,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 16:03:20,464 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:03:20,464 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-03 16:03:20,464 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 16:03:20,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:20,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:03:20,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 16:03:20,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:20,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1867215187, now seen corresponding path program 1 times [2023-08-03 16:03:20,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:20,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900105378] [2023-08-03 16:03:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:20,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:20,558 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 16:03:20,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:20,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900105378] [2023-08-03 16:03:20,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900105378] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:03:20,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:03:20,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 16:03:20,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817246198] [2023-08-03 16:03:20,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:03:20,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:03:20,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:20,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:03:20,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:03:20,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 183 [2023-08-03 16:03:20,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:20,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:20,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 183 [2023-08-03 16:03:20,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:20,663 INFO L124 PetriNetUnfolderBase]: 531/1053 cut-off events. [2023-08-03 16:03:20,663 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-03 16:03:20,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 1053 events. 531/1053 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5563 event pairs, 217 based on Foata normal form. 68/997 useless extension candidates. Maximal degree in co-relation 1310. Up to 536 conditions per place. [2023-08-03 16:03:20,668 INFO L140 encePairwiseOnDemand]: 173/183 looper letters, 32 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-08-03 16:03:20,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 185 flow [2023-08-03 16:03:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:03:20,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:03:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-03 16:03:20,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5391621129326047 [2023-08-03 16:03:20,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-03 16:03:20,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-03 16:03:20,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:20,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-03 16:03:20,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:20,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:20,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:20,674 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 82 flow. Second operand 3 states and 296 transitions. [2023-08-03 16:03:20,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 185 flow [2023-08-03 16:03:20,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 48 transitions, 183 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 16:03:20,675 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 116 flow [2023-08-03 16:03:20,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2023-08-03 16:03:20,675 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-03 16:03:20,676 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 116 flow [2023-08-03 16:03:20,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:20,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:20,676 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 16:03:20,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 16:03:20,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 16:03:20,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash 453054460, now seen corresponding path program 1 times [2023-08-03 16:03:20,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:20,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963011947] [2023-08-03 16:03:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:20,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:20,736 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 16:03:20,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:20,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963011947] [2023-08-03 16:03:20,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963011947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:03:20,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878199775] [2023-08-03 16:03:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:20,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:20,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:03:20,761 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 16:03:20,775 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 16:03:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:20,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 16:03:20,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:03:20,904 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 16:03:20,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:03:20,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878199775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:03:20,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 16:03:20,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 16:03:20,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007668089] [2023-08-03 16:03:20,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:03:20,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:03:20,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:20,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:03:20,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 16:03:20,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 183 [2023-08-03 16:03:20,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:20,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:20,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 183 [2023-08-03 16:03:20,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:21,000 INFO L124 PetriNetUnfolderBase]: 328/638 cut-off events. [2023-08-03 16:03:21,000 INFO L125 PetriNetUnfolderBase]: For 263/272 co-relation queries the response was YES. [2023-08-03 16:03:21,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1434 conditions, 638 events. 328/638 cut-off events. For 263/272 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3028 event pairs, 47 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 715. Up to 397 conditions per place. [2023-08-03 16:03:21,002 INFO L140 encePairwiseOnDemand]: 179/183 looper letters, 40 selfloop transitions, 4 changer transitions 1/60 dead transitions. [2023-08-03 16:03:21,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 60 transitions, 276 flow [2023-08-03 16:03:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:03:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:03:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 470 transitions. [2023-08-03 16:03:21,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136612021857924 [2023-08-03 16:03:21,004 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 470 transitions. [2023-08-03 16:03:21,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 470 transitions. [2023-08-03 16:03:21,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:21,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 470 transitions. [2023-08-03 16:03:21,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,008 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 183.0) internal successors, (1098), 6 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,008 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 116 flow. Second operand 5 states and 470 transitions. [2023-08-03 16:03:21,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 60 transitions, 276 flow [2023-08-03 16:03:21,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 60 transitions, 259 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 16:03:21,010 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 128 flow [2023-08-03 16:03:21,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-03 16:03:21,010 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-03 16:03:21,010 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 128 flow [2023-08-03 16:03:21,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:21,011 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:03:21,020 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 16:03:21,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:21,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 16:03:21,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:21,216 INFO L85 PathProgramCache]: Analyzing trace with hash 806935624, now seen corresponding path program 1 times [2023-08-03 16:03:21,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:21,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568534708] [2023-08-03 16:03:21,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:21,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:03:21,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:21,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568534708] [2023-08-03 16:03:21,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568534708] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:03:21,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:03:21,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 16:03:21,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094766814] [2023-08-03 16:03:21,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:03:21,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:03:21,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:21,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:03:21,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:03:21,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 183 [2023-08-03 16:03:21,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:21,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 183 [2023-08-03 16:03:21,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:21,391 INFO L124 PetriNetUnfolderBase]: 504/997 cut-off events. [2023-08-03 16:03:21,391 INFO L125 PetriNetUnfolderBase]: For 748/757 co-relation queries the response was YES. [2023-08-03 16:03:21,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2495 conditions, 997 events. 504/997 cut-off events. For 748/757 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4785 event pairs, 147 based on Foata normal form. 42/1020 useless extension candidates. Maximal degree in co-relation 1940. Up to 419 conditions per place. [2023-08-03 16:03:21,395 INFO L140 encePairwiseOnDemand]: 176/183 looper letters, 37 selfloop transitions, 7 changer transitions 2/58 dead transitions. [2023-08-03 16:03:21,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 294 flow [2023-08-03 16:03:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:03:21,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:03:21,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-08-03 16:03:21,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318761384335154 [2023-08-03 16:03:21,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-08-03 16:03:21,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-08-03 16:03:21,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:21,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-08-03 16:03:21,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,398 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 128 flow. Second operand 3 states and 292 transitions. [2023-08-03 16:03:21,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 294 flow [2023-08-03 16:03:21,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:03:21,399 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 162 flow [2023-08-03 16:03:21,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-03 16:03:21,400 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2023-08-03 16:03:21,400 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 162 flow [2023-08-03 16:03:21,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:21,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:03:21,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 16:03:21,401 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 16:03:21,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:21,401 INFO L85 PathProgramCache]: Analyzing trace with hash -536016580, now seen corresponding path program 1 times [2023-08-03 16:03:21,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:21,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882456945] [2023-08-03 16:03:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:21,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 16:03:21,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:21,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882456945] [2023-08-03 16:03:21,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882456945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:03:21,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:03:21,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 16:03:21,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64341936] [2023-08-03 16:03:21,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:03:21,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:03:21,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:21,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:03:21,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:03:21,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 183 [2023-08-03 16:03:21,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:21,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 183 [2023-08-03 16:03:21,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:21,651 INFO L124 PetriNetUnfolderBase]: 712/1384 cut-off events. [2023-08-03 16:03:21,651 INFO L125 PetriNetUnfolderBase]: For 1390/1410 co-relation queries the response was YES. [2023-08-03 16:03:21,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3996 conditions, 1384 events. 712/1384 cut-off events. For 1390/1410 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6757 event pairs, 149 based on Foata normal form. 41/1406 useless extension candidates. Maximal degree in co-relation 3067. Up to 426 conditions per place. [2023-08-03 16:03:21,657 INFO L140 encePairwiseOnDemand]: 175/183 looper letters, 72 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2023-08-03 16:03:21,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 104 transitions, 627 flow [2023-08-03 16:03:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 16:03:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 16:03:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 656 transitions. [2023-08-03 16:03:21,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120999219359875 [2023-08-03 16:03:21,659 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 656 transitions. [2023-08-03 16:03:21,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 656 transitions. [2023-08-03 16:03:21,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:21,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 656 transitions. [2023-08-03 16:03:21,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.71428571428571) internal successors, (656), 7 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 183.0) internal successors, (1464), 8 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,662 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 183.0) internal successors, (1464), 8 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,662 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 162 flow. Second operand 7 states and 656 transitions. [2023-08-03 16:03:21,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 104 transitions, 627 flow [2023-08-03 16:03:21,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 104 transitions, 605 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:03:21,665 INFO L231 Difference]: Finished difference. Result has 52 places, 58 transitions, 300 flow [2023-08-03 16:03:21,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=300, PETRI_PLACES=52, PETRI_TRANSITIONS=58} [2023-08-03 16:03:21,666 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2023-08-03 16:03:21,666 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 58 transitions, 300 flow [2023-08-03 16:03:21,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:21,666 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:03:21,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 16:03:21,666 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 16:03:21,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:21,667 INFO L85 PathProgramCache]: Analyzing trace with hash 502164956, now seen corresponding path program 1 times [2023-08-03 16:03:21,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:21,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018740818] [2023-08-03 16:03:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:21,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 16:03:21,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:21,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018740818] [2023-08-03 16:03:21,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018740818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:03:21,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:03:21,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 16:03:21,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915057800] [2023-08-03 16:03:21,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:03:21,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:03:21,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:21,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:03:21,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:03:21,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 183 [2023-08-03 16:03:21,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 58 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:21,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 183 [2023-08-03 16:03:21,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:21,918 INFO L124 PetriNetUnfolderBase]: 1007/1933 cut-off events. [2023-08-03 16:03:21,918 INFO L125 PetriNetUnfolderBase]: For 2952/2979 co-relation queries the response was YES. [2023-08-03 16:03:21,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6296 conditions, 1933 events. 1007/1933 cut-off events. For 2952/2979 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 10022 event pairs, 275 based on Foata normal form. 30/1936 useless extension candidates. Maximal degree in co-relation 5241. Up to 729 conditions per place. [2023-08-03 16:03:21,927 INFO L140 encePairwiseOnDemand]: 176/183 looper letters, 72 selfloop transitions, 25 changer transitions 0/111 dead transitions. [2023-08-03 16:03:21,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 111 transitions, 772 flow [2023-08-03 16:03:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 16:03:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 16:03:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 559 transitions. [2023-08-03 16:03:21,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091074681238615 [2023-08-03 16:03:21,928 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 559 transitions. [2023-08-03 16:03:21,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 559 transitions. [2023-08-03 16:03:21,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:21,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 559 transitions. [2023-08-03 16:03:21,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.16666666666667) internal successors, (559), 6 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 183.0) internal successors, (1281), 7 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,931 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 183.0) internal successors, (1281), 7 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,931 INFO L175 Difference]: Start difference. First operand has 52 places, 58 transitions, 300 flow. Second operand 6 states and 559 transitions. [2023-08-03 16:03:21,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 111 transitions, 772 flow [2023-08-03 16:03:21,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 111 transitions, 760 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-03 16:03:21,936 INFO L231 Difference]: Finished difference. Result has 60 places, 73 transitions, 486 flow [2023-08-03 16:03:21,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=486, PETRI_PLACES=60, PETRI_TRANSITIONS=73} [2023-08-03 16:03:21,936 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2023-08-03 16:03:21,937 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 73 transitions, 486 flow [2023-08-03 16:03:21,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:21,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:21,937 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:03:21,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 16:03:21,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 16:03:21,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:21,937 INFO L85 PathProgramCache]: Analyzing trace with hash 523996750, now seen corresponding path program 2 times [2023-08-03 16:03:21,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:21,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367341729] [2023-08-03 16:03:21,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:21,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 16:03:22,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:22,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367341729] [2023-08-03 16:03:22,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367341729] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:03:22,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612386829] [2023-08-03 16:03:22,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 16:03:22,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:22,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:03:22,022 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 16:03:22,024 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 16:03:22,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 16:03:22,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 16:03:22,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-03 16:03:22,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:03:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 16:03:22,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:03:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 16:03:22,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612386829] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:03:22,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:03:22,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-03 16:03:22,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988043684] [2023-08-03 16:03:22,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:03:22,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-03 16:03:22,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:22,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-03 16:03:22,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-03 16:03:22,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 183 [2023-08-03 16:03:22,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 73 transitions, 486 flow. Second operand has 12 states, 12 states have (on average 81.66666666666667) internal successors, (980), 12 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:22,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 183 [2023-08-03 16:03:22,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:22,785 INFO L124 PetriNetUnfolderBase]: 2080/3722 cut-off events. [2023-08-03 16:03:22,785 INFO L125 PetriNetUnfolderBase]: For 9209/9245 co-relation queries the response was YES. [2023-08-03 16:03:22,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13387 conditions, 3722 events. 2080/3722 cut-off events. For 9209/9245 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 18781 event pairs, 213 based on Foata normal form. 66/3761 useless extension candidates. Maximal degree in co-relation 12161. Up to 838 conditions per place. [2023-08-03 16:03:22,804 INFO L140 encePairwiseOnDemand]: 168/183 looper letters, 185 selfloop transitions, 103 changer transitions 0/298 dead transitions. [2023-08-03 16:03:22,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 298 transitions, 2295 flow [2023-08-03 16:03:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-03 16:03:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-03 16:03:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2600 transitions. [2023-08-03 16:03:22,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47358834244080145 [2023-08-03 16:03:22,808 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2600 transitions. [2023-08-03 16:03:22,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2600 transitions. [2023-08-03 16:03:22,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:22,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2600 transitions. [2023-08-03 16:03:22,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 86.66666666666667) internal successors, (2600), 30 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 183.0) internal successors, (5673), 31 states have internal predecessors, (5673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,818 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 183.0) internal successors, (5673), 31 states have internal predecessors, (5673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,819 INFO L175 Difference]: Start difference. First operand has 60 places, 73 transitions, 486 flow. Second operand 30 states and 2600 transitions. [2023-08-03 16:03:22,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 298 transitions, 2295 flow [2023-08-03 16:03:22,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 298 transitions, 2285 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-03 16:03:22,836 INFO L231 Difference]: Finished difference. Result has 98 places, 146 transitions, 1362 flow [2023-08-03 16:03:22,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1362, PETRI_PLACES=98, PETRI_TRANSITIONS=146} [2023-08-03 16:03:22,836 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 62 predicate places. [2023-08-03 16:03:22,836 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 146 transitions, 1362 flow [2023-08-03 16:03:22,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.66666666666667) internal successors, (980), 12 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:22,837 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:03:22,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 16:03:23,041 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,SelfDestructingSolverStorable7 [2023-08-03 16:03:23,042 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 16:03:23,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:23,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1381527846, now seen corresponding path program 1 times [2023-08-03 16:03:23,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:23,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218309419] [2023-08-03 16:03:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:23,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:03:23,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:23,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218309419] [2023-08-03 16:03:23,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218309419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:03:23,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626530719] [2023-08-03 16:03:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:23,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:23,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:03:23,221 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 16:03:23,222 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 16:03:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:23,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-03 16:03:23,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:03:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:03:23,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:03:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:03:23,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626530719] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:03:23,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:03:23,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-08-03 16:03:23,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83196509] [2023-08-03 16:03:23,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:03:23,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-03 16:03:23,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:23,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-03 16:03:23,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-08-03 16:03:23,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 183 [2023-08-03 16:03:23,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 146 transitions, 1362 flow. Second operand has 20 states, 20 states have (on average 81.3) internal successors, (1626), 20 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:23,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:23,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 183 [2023-08-03 16:03:23,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:25,077 INFO L124 PetriNetUnfolderBase]: 4223/7453 cut-off events. [2023-08-03 16:03:25,077 INFO L125 PetriNetUnfolderBase]: For 29812/29917 co-relation queries the response was YES. [2023-08-03 16:03:25,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31461 conditions, 7453 events. 4223/7453 cut-off events. For 29812/29917 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 39150 event pairs, 297 based on Foata normal form. 183/7586 useless extension candidates. Maximal degree in co-relation 30109. Up to 1707 conditions per place. [2023-08-03 16:03:25,130 INFO L140 encePairwiseOnDemand]: 168/183 looper letters, 338 selfloop transitions, 293 changer transitions 0/641 dead transitions. [2023-08-03 16:03:25,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 641 transitions, 6187 flow [2023-08-03 16:03:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-03 16:03:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-03 16:03:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 5398 transitions. [2023-08-03 16:03:25,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46821059935814036 [2023-08-03 16:03:25,139 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 5398 transitions. [2023-08-03 16:03:25,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 5398 transitions. [2023-08-03 16:03:25,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:25,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 5398 transitions. [2023-08-03 16:03:25,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 85.68253968253968) internal successors, (5398), 63 states have internal predecessors, (5398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:25,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 183.0) internal successors, (11712), 64 states have internal predecessors, (11712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:25,164 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 183.0) internal successors, (11712), 64 states have internal predecessors, (11712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:25,164 INFO L175 Difference]: Start difference. First operand has 98 places, 146 transitions, 1362 flow. Second operand 63 states and 5398 transitions. [2023-08-03 16:03:25,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 641 transitions, 6187 flow [2023-08-03 16:03:25,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 641 transitions, 5694 flow, removed 111 selfloop flow, removed 6 redundant places. [2023-08-03 16:03:25,282 INFO L231 Difference]: Finished difference. Result has 164 places, 347 transitions, 3790 flow [2023-08-03 16:03:25,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=3790, PETRI_PLACES=164, PETRI_TRANSITIONS=347} [2023-08-03 16:03:25,282 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 128 predicate places. [2023-08-03 16:03:25,282 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 347 transitions, 3790 flow [2023-08-03 16:03:25,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 81.3) internal successors, (1626), 20 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:25,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:25,283 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:03:25,303 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 16:03:25,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:25,490 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 16:03:25,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:25,491 INFO L85 PathProgramCache]: Analyzing trace with hash -841468458, now seen corresponding path program 1 times [2023-08-03 16:03:25,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:25,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102559387] [2023-08-03 16:03:25,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:25,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 56 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:03:25,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:25,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102559387] [2023-08-03 16:03:25,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102559387] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:03:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639105057] [2023-08-03 16:03:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:25,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:25,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:03:25,851 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 16:03:25,853 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 16:03:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:25,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-03 16:03:25,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:03:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 56 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:03:26,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:03:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 56 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:03:26,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639105057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:03:26,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:03:26,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2023-08-03 16:03:26,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167664969] [2023-08-03 16:03:26,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:03:26,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-03 16:03:26,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:26,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-03 16:03:26,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2023-08-03 16:03:26,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 183 [2023-08-03 16:03:26,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 347 transitions, 3790 flow. Second operand has 36 states, 36 states have (on average 81.55555555555556) internal successors, (2936), 36 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:26,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:26,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 183 [2023-08-03 16:03:26,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:30,025 INFO L124 PetriNetUnfolderBase]: 7865/13833 cut-off events. [2023-08-03 16:03:30,025 INFO L125 PetriNetUnfolderBase]: For 69379/69589 co-relation queries the response was YES. [2023-08-03 16:03:30,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63225 conditions, 13833 events. 7865/13833 cut-off events. For 69379/69589 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 73418 event pairs, 465 based on Foata normal form. 372/14103 useless extension candidates. Maximal degree in co-relation 61817. Up to 3184 conditions per place. [2023-08-03 16:03:30,137 INFO L140 encePairwiseOnDemand]: 168/183 looper letters, 630 selfloop transitions, 637 changer transitions 0/1277 dead transitions. [2023-08-03 16:03:30,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 1277 transitions, 13363 flow [2023-08-03 16:03:30,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-08-03 16:03:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2023-08-03 16:03:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 11230 transitions. [2023-08-03 16:03:30,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46489485014075177 [2023-08-03 16:03:30,153 INFO L72 ComplementDD]: Start complementDD. Operand 132 states and 11230 transitions. [2023-08-03 16:03:30,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 132 states and 11230 transitions. [2023-08-03 16:03:30,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:30,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 132 states and 11230 transitions. [2023-08-03 16:03:30,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 133 states, 132 states have (on average 85.07575757575758) internal successors, (11230), 132 states have internal predecessors, (11230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:30,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 133 states, 133 states have (on average 183.0) internal successors, (24339), 133 states have internal predecessors, (24339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:30,206 INFO L81 ComplementDD]: Finished complementDD. Result has 133 states, 133 states have (on average 183.0) internal successors, (24339), 133 states have internal predecessors, (24339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:30,206 INFO L175 Difference]: Start difference. First operand has 164 places, 347 transitions, 3790 flow. Second operand 132 states and 11230 transitions. [2023-08-03 16:03:30,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 1277 transitions, 13363 flow [2023-08-03 16:03:30,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 1277 transitions, 11287 flow, removed 374 selfloop flow, removed 9 redundant places. [2023-08-03 16:03:30,410 INFO L231 Difference]: Finished difference. Result has 302 places, 693 transitions, 7348 flow [2023-08-03 16:03:30,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=132, PETRI_FLOW=7348, PETRI_PLACES=302, PETRI_TRANSITIONS=693} [2023-08-03 16:03:30,411 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 266 predicate places. [2023-08-03 16:03:30,411 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 693 transitions, 7348 flow [2023-08-03 16:03:30,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 81.55555555555556) internal successors, (2936), 36 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:30,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:30,412 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 16:03:30,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 16:03:30,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:30,617 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 16:03:30,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:30,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1923364952, now seen corresponding path program 2 times [2023-08-03 16:03:30,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:30,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719961422] [2023-08-03 16:03:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:30,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 109 proven. 463 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:03:31,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:31,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719961422] [2023-08-03 16:03:31,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719961422] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:03:31,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906791216] [2023-08-03 16:03:31,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 16:03:31,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:31,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:03:31,648 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 16:03:31,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 16:03:31,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 16:03:31,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 16:03:31,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-03 16:03:31,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:03:31,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-03 16:03:31,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 16:03:31,923 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 16:03:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2023-08-03 16:03:31,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:03:31,977 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_641 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#B~0.base| v_ArrVal_641) |c_~#A~0.base|) |c_~#A~0.offset|) 0))) is different from false [2023-08-03 16:03:31,987 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 16:03:31,988 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-08-03 16:03:31,991 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-08-03 16:03:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2023-08-03 16:03:32,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906791216] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:03:32,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:03:32,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 4, 4] total 41 [2023-08-03 16:03:32,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919909185] [2023-08-03 16:03:32,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:03:32,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-03 16:03:32,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-03 16:03:32,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1286, Unknown=1, NotChecked=76, Total=1640 [2023-08-03 16:03:32,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 183 [2023-08-03 16:03:32,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 693 transitions, 7348 flow. Second operand has 41 states, 41 states have (on average 61.0) internal successors, (2501), 41 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:32,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:32,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 183 [2023-08-03 16:03:32,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:32,538 INFO L124 PetriNetUnfolderBase]: 383/707 cut-off events. [2023-08-03 16:03:32,538 INFO L125 PetriNetUnfolderBase]: For 1331/1331 co-relation queries the response was YES. [2023-08-03 16:03:32,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2842 conditions, 707 events. 383/707 cut-off events. For 1331/1331 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3169 event pairs, 0 based on Foata normal form. 42/749 useless extension candidates. Maximal degree in co-relation 2796. Up to 237 conditions per place. [2023-08-03 16:03:32,541 INFO L140 encePairwiseOnDemand]: 172/183 looper letters, 0 selfloop transitions, 0 changer transitions 96/96 dead transitions. [2023-08-03 16:03:32,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 96 transitions, 694 flow [2023-08-03 16:03:32,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-03 16:03:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-03 16:03:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 765 transitions. [2023-08-03 16:03:32,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3483606557377049 [2023-08-03 16:03:32,542 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 765 transitions. [2023-08-03 16:03:32,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 765 transitions. [2023-08-03 16:03:32,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:32,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 765 transitions. [2023-08-03 16:03:32,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 63.75) internal successors, (765), 12 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:32,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 183.0) internal successors, (2379), 13 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:32,545 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 183.0) internal successors, (2379), 13 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:32,545 INFO L175 Difference]: Start difference. First operand has 302 places, 693 transitions, 7348 flow. Second operand 12 states and 765 transitions. [2023-08-03 16:03:32,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 96 transitions, 694 flow [2023-08-03 16:03:32,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 96 transitions, 592 flow, removed 4 selfloop flow, removed 25 redundant places. [2023-08-03 16:03:32,547 INFO L231 Difference]: Finished difference. Result has 84 places, 0 transitions, 0 flow [2023-08-03 16:03:32,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=84, PETRI_TRANSITIONS=0} [2023-08-03 16:03:32,548 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 48 predicate places. [2023-08-03 16:03:32,548 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 0 transitions, 0 flow [2023-08-03 16:03:32,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 61.0) internal successors, (2501), 41 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:32,548 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 16:03:32,549 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 16:03:32,549 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-03 16:03:32,549 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-03 16:03:32,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 16:03:32,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-03 16:03:32,754 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2023-08-03 16:03:32,757 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 16:03:32,757 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 16:03:32,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 04:03:32 BasicIcfg [2023-08-03 16:03:32,762 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 16:03:32,763 INFO L158 Benchmark]: Toolchain (without parser) took 17431.51ms. Allocated memory was 394.3MB in the beginning and 1.5GB in the end (delta: 1.1GB). Free memory was 359.4MB in the beginning and 1.1GB in the end (delta: -753.5MB). Peak memory consumption was 306.1MB. Max. memory is 16.0GB. [2023-08-03 16:03:32,763 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 394.3MB. Free memory is still 350.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 16:03:32,763 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.39ms. Allocated memory is still 394.3MB. Free memory was 359.4MB in the beginning and 340.2MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 16:03:32,763 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.56ms. Allocated memory is still 394.3MB. Free memory was 340.2MB in the beginning and 338.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 16:03:32,763 INFO L158 Benchmark]: Boogie Preprocessor took 28.62ms. Allocated memory is still 394.3MB. Free memory was 338.0MB in the beginning and 336.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 16:03:32,763 INFO L158 Benchmark]: RCFGBuilder took 323.89ms. Allocated memory is still 394.3MB. Free memory was 336.7MB in the beginning and 323.6MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-03 16:03:32,764 INFO L158 Benchmark]: TraceAbstraction took 16763.91ms. Allocated memory was 394.3MB in the beginning and 1.5GB in the end (delta: 1.1GB). Free memory was 322.8MB in the beginning and 1.1GB in the end (delta: -790.0MB). Peak memory consumption was 268.4MB. Max. memory is 16.0GB. [2023-08-03 16:03:32,765 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 394.3MB. Free memory is still 350.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 270.39ms. Allocated memory is still 394.3MB. Free memory was 359.4MB in the beginning and 340.2MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 39.56ms. Allocated memory is still 394.3MB. Free memory was 340.2MB in the beginning and 338.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 28.62ms. Allocated memory is still 394.3MB. Free memory was 338.0MB in the beginning and 336.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 323.89ms. Allocated memory is still 394.3MB. Free memory was 336.7MB in the beginning and 323.6MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 16763.91ms. Allocated memory was 394.3MB in the beginning and 1.5GB in the end (delta: 1.1GB). Free memory was 322.8MB in the beginning and 1.1GB in the end (delta: -790.0MB). Peak memory consumption was 268.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 72 PlacesBefore, 12 PlacesAfterwards, 74 TransitionsBefore, 10 TransitionsAfterwards, 918 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 74 TotalNumberOfCompositions, 675 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 675, independent: 675, independent conditional: 0, independent unconditional: 675, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 469, independent: 469, independent conditional: 0, independent unconditional: 469, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 675, independent: 206, independent conditional: 0, independent unconditional: 206, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 469, unknown conditional: 0, unknown unconditional: 469] , Statistics on independence cache: Total cache size (in pairs): 4, Positive cache size: 4, Positive conditional cache size: 0, Positive unconditional cache size: 4, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 98 PlacesBefore, 36 PlacesAfterwards, 102 TransitionsBefore, 35 TransitionsAfterwards, 3348 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 5 ChoiceCompositions, 81 TotalNumberOfCompositions, 8072 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3768, independent: 3526, independent conditional: 0, independent unconditional: 3526, dependent: 242, dependent conditional: 0, dependent unconditional: 242, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1685, independent: 1649, independent conditional: 0, independent unconditional: 1649, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3768, independent: 1877, independent conditional: 0, independent unconditional: 1877, dependent: 206, dependent conditional: 0, dependent unconditional: 206, unknown: 1685, unknown conditional: 0, unknown unconditional: 1685] , Statistics on independence cache: Total cache size (in pairs): 149, Positive cache size: 129, Positive conditional cache size: 0, Positive unconditional cache size: 129, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 94 locations, 3 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: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6 IncrementalHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 0 mSDtfsCounter, 6 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 2, 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, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 4 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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, 118 locations, 4 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: 14.2s, OverallIterations: 9, TraceHistogramMax: 9, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2435 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2350 mSDsluCounter, 353 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 110 IncrementalHoareTripleChecker+Unchecked, 317 mSDsCounter, 150 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3774 IncrementalHoareTripleChecker+Invalid, 4034 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 150 mSolverCounterUnsat, 36 mSDtfsCounter, 3774 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1158 GetRequests, 850 SyntacticMatches, 3 SemanticMatches, 305 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10016 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7348occurred in iteration=8, InterpolantAutomatonStates: 261, 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: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 785 NumberOfCodeBlocks, 785 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1109 ConstructedInterpolants, 1 QuantifiedInterpolants, 2350 SizeOfPredicates, 24 NumberOfNonLiveVariables, 1820 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 1604/2386 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 16:03:32,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...