/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/ldv-races_race-1_1-join_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:11:19,382 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:11:19,446 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:11:19,452 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:11:19,453 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:11:19,453 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:11:19,453 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:11:19,480 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:11:19,481 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:11:19,484 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:11:19,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:11:19,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:11:19,485 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:11:19,486 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:11:19,487 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:11:19,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:11:19,487 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:11:19,487 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:11:19,487 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:11:19,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:11:19,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:11:19,488 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:11:19,488 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:11:19,488 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:11:19,489 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:11:19,489 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:11:19,489 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:11:19,490 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:11:19,490 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:11:19,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:11:19,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:11:19,491 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:11:19,491 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:11:19,491 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:11:19,491 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:11:19,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:11:19,492 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:11:19,492 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:11:19,492 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:11:19,492 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:11:19,492 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:11:19,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:11:19,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:11:19,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:11:19,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:11:19,748 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:11:19,749 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:11:19,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/ldv-races_race-1_1-join_bound2.i [2023-08-03 22:11:20,881 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:11:21,135 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:11:21,136 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/ldv-races_race-1_1-join_bound2.i [2023-08-03 22:11:21,170 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f0344bc/b084957f0e404446982c3baa07dfb008/FLAG12e7f8ace [2023-08-03 22:11:21,184 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f0344bc/b084957f0e404446982c3baa07dfb008 [2023-08-03 22:11:21,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:11:21,189 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:11:21,192 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:11:21,193 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:11:21,195 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:11:21,196 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:11:21" (1/1) ... [2023-08-03 22:11:21,197 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a1b835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21, skipping insertion in model container [2023-08-03 22:11:21,197 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:11:21" (1/1) ... [2023-08-03 22:11:21,252 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:11:21,695 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/ldv-races_race-1_1-join_bound2.i[76068,76081] [2023-08-03 22:11:21,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:11:21,721 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:11:21,745 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-03 22:11:21,747 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-03 22:11:21,763 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [729] [2023-08-03 22:11:21,800 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/ldv-races_race-1_1-join_bound2.i[76068,76081] [2023-08-03 22:11:21,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:11:21,947 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:11:21,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21 WrapperNode [2023-08-03 22:11:21,948 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:11:21,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:11:21,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:11:21,949 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:11:21,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21" (1/1) ... [2023-08-03 22:11:21,989 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21" (1/1) ... [2023-08-03 22:11:22,022 INFO L138 Inliner]: procedures = 480, calls = 28, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 109 [2023-08-03 22:11:22,022 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:11:22,023 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:11:22,023 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:11:22,023 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:11:22,030 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21" (1/1) ... [2023-08-03 22:11:22,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21" (1/1) ... [2023-08-03 22:11:22,033 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21" (1/1) ... [2023-08-03 22:11:22,033 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21" (1/1) ... [2023-08-03 22:11:22,041 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21" (1/1) ... [2023-08-03 22:11:22,044 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21" (1/1) ... [2023-08-03 22:11:22,047 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21" (1/1) ... [2023-08-03 22:11:22,049 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21" (1/1) ... [2023-08-03 22:11:22,054 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:11:22,055 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:11:22,055 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:11:22,055 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:11:22,056 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21" (1/1) ... [2023-08-03 22:11:22,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:11:22,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:11:22,091 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 22:11:22,096 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 22:11:22,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:11:22,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 22:11:22,114 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 22:11:22,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:11:22,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-03 22:11:22,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:11:22,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:11:22,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:11:22,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 22:11:22,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 22:11:22,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:11:22,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:11:22,116 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 22:11:22,327 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:11:22,329 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:11:22,508 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:11:22,523 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:11:22,523 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 22:11:22,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:11:22 BoogieIcfgContainer [2023-08-03 22:11:22,525 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:11:22,526 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:11:22,526 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:11:22,529 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:11:22,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:11:21" (1/3) ... [2023-08-03 22:11:22,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc959b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:11:22, skipping insertion in model container [2023-08-03 22:11:22,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:11:21" (2/3) ... [2023-08-03 22:11:22,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc959b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:11:22, skipping insertion in model container [2023-08-03 22:11:22,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:11:22" (3/3) ... [2023-08-03 22:11:22,535 INFO L112 eAbstractionObserver]: Analyzing ICFG ldv-races_race-1_1-join_bound2.i [2023-08-03 22:11:22,542 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:11:22,548 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:11:22,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-03 22:11:22,548 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:11:22,581 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 22:11:22,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 115 transitions, 238 flow [2023-08-03 22:11:22,651 INFO L124 PetriNetUnfolderBase]: 13/151 cut-off events. [2023-08-03 22:11:22,651 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 22:11:22,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 151 events. 13/151 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 286 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-08-03 22:11:22,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 115 transitions, 238 flow [2023-08-03 22:11:22,659 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 95 transitions, 195 flow [2023-08-03 22:11:22,662 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:11:22,670 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 95 transitions, 195 flow [2023-08-03 22:11:22,672 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 95 transitions, 195 flow [2023-08-03 22:11:22,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 95 transitions, 195 flow [2023-08-03 22:11:22,695 INFO L124 PetriNetUnfolderBase]: 10/131 cut-off events. [2023-08-03 22:11:22,695 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:11:22,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 131 events. 10/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-03 22:11:22,697 INFO L119 LiptonReduction]: Number of co-enabled transitions 1260 [2023-08-03 22:11:25,269 INFO L134 LiptonReduction]: Checked pairs total: 1471 [2023-08-03 22:11:25,270 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-03 22:11:25,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:11:25,293 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;@27e769c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:11:25,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:11:25,298 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:11:25,298 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-08-03 22:11:25,298 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:11:25,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:11:25,299 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 22:11:25,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:11:25,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:11:25,303 INFO L85 PathProgramCache]: Analyzing trace with hash -41500532, now seen corresponding path program 1 times [2023-08-03 22:11:25,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:11:25,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296996497] [2023-08-03 22:11:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:25,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:11:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:11:25,472 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:11:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:11:25,516 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:11:25,517 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:11:25,518 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:11:25,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:11:25,520 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:11:25,522 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 22:11:25,523 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:11:25,523 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:11:25,542 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 22:11:25,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 132 transitions, 282 flow [2023-08-03 22:11:25,583 INFO L124 PetriNetUnfolderBase]: 22/243 cut-off events. [2023-08-03 22:11:25,583 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 22:11:25,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 243 events. 22/243 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 587 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-08-03 22:11:25,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 132 transitions, 282 flow [2023-08-03 22:11:25,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 119 transitions, 256 flow [2023-08-03 22:11:25,590 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:11:25,590 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 119 transitions, 256 flow [2023-08-03 22:11:25,591 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 119 transitions, 256 flow [2023-08-03 22:11:25,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 119 transitions, 256 flow [2023-08-03 22:11:25,622 INFO L124 PetriNetUnfolderBase]: 20/230 cut-off events. [2023-08-03 22:11:25,622 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 22:11:25,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 230 events. 20/230 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 543 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 140. Up to 8 conditions per place. [2023-08-03 22:11:25,632 INFO L119 LiptonReduction]: Number of co-enabled transitions 3420 [2023-08-03 22:11:28,019 INFO L134 LiptonReduction]: Checked pairs total: 7021 [2023-08-03 22:11:28,019 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-03 22:11:28,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:11:28,023 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;@27e769c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:11:28,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:11:28,028 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:11:28,028 INFO L124 PetriNetUnfolderBase]: 7/41 cut-off events. [2023-08-03 22:11:28,028 INFO L125 PetriNetUnfolderBase]: For 3/4 co-relation queries the response was YES. [2023-08-03 22:11:28,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:11:28,029 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 22:11:28,029 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:11:28,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:11:28,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1511111800, now seen corresponding path program 1 times [2023-08-03 22:11:28,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:11:28,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939993327] [2023-08-03 22:11:28,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:28,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:11:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:11:28,246 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 22:11:28,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:11:28,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939993327] [2023-08-03 22:11:28,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939993327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:11:28,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520362534] [2023-08-03 22:11:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:28,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:11:28,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:11:28,257 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 22:11:28,285 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 22:11:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:11:28,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:11:28,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:11:28,434 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 22:11:28,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:11:28,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520362534] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:11:28,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:11:28,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 22:11:28,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987047664] [2023-08-03 22:11:28,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:11:28,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:11:28,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:11:28,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:11:28,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:11:28,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 252 [2023-08-03 22:11:28,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:28,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:11:28,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 252 [2023-08-03 22:11:28,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:11:28,646 INFO L124 PetriNetUnfolderBase]: 549/972 cut-off events. [2023-08-03 22:11:28,646 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-03 22:11:28,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1964 conditions, 972 events. 549/972 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4939 event pairs, 0 based on Foata normal form. 51/745 useless extension candidates. Maximal degree in co-relation 407. Up to 837 conditions per place. [2023-08-03 22:11:28,650 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 0 selfloop transitions, 0 changer transitions 47/47 dead transitions. [2023-08-03 22:11:28,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 198 flow [2023-08-03 22:11:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:11:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:11:28,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 610 transitions. [2023-08-03 22:11:28,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2023-08-03 22:11:28,664 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 610 transitions. [2023-08-03 22:11:28,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 610 transitions. [2023-08-03 22:11:28,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:11:28,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 610 transitions. [2023-08-03 22:11:28,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:28,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:28,680 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:28,682 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 82 flow. Second operand 5 states and 610 transitions. [2023-08-03 22:11:28,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 198 flow [2023-08-03 22:11:28,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 47 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:11:28,693 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-08-03 22:11:28,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-08-03 22:11:28,698 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-08-03 22:11:28,698 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-08-03 22:11:28,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:28,699 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:11:28,707 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 22:11:28,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:11:28,904 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:11:28,905 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 22:11:28,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 132 transitions, 282 flow [2023-08-03 22:11:28,924 INFO L124 PetriNetUnfolderBase]: 22/243 cut-off events. [2023-08-03 22:11:28,924 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 22:11:28,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 243 events. 22/243 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 587 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-08-03 22:11:28,925 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 132 transitions, 282 flow [2023-08-03 22:11:28,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 132 transitions, 282 flow [2023-08-03 22:11:28,927 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:11:28,927 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 132 transitions, 282 flow [2023-08-03 22:11:28,927 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 132 transitions, 282 flow [2023-08-03 22:11:28,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 132 transitions, 282 flow [2023-08-03 22:11:28,955 INFO L124 PetriNetUnfolderBase]: 22/243 cut-off events. [2023-08-03 22:11:28,955 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 22:11:28,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 243 events. 22/243 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 587 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-08-03 22:11:28,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 3420 [2023-08-03 22:11:31,711 INFO L134 LiptonReduction]: Checked pairs total: 6804 [2023-08-03 22:11:31,712 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-08-03 22:11:31,713 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:11:31,714 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;@27e769c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:11:31,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 22:11:31,715 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:11:31,715 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-03 22:11:31,715 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:11:31,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:11:31,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-03 22:11:31,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:11:31,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:11:31,716 INFO L85 PathProgramCache]: Analyzing trace with hash 836, now seen corresponding path program 1 times [2023-08-03 22:11:31,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:11:31,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202272049] [2023-08-03 22:11:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:31,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:11:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:11:31,753 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 22:11:31,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:11:31,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202272049] [2023-08-03 22:11:31,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202272049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:11:31,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:11:31,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-03 22:11:31,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811270589] [2023-08-03 22:11:31,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:11:31,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-03 22:11:31,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:11:31,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-03 22:11:31,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-03 22:11:31,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 266 [2023-08-03 22:11:31,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 84 flow. Second operand has 2 states, 2 states have (on average 116.5) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:31,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:11:31,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 266 [2023-08-03 22:11:31,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:11:31,882 INFO L124 PetriNetUnfolderBase]: 637/1090 cut-off events. [2023-08-03 22:11:31,882 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-03 22:11:31,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2204 conditions, 1090 events. 637/1090 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4867 event pairs, 585 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 649. Up to 1067 conditions per place. [2023-08-03 22:11:31,887 INFO L140 encePairwiseOnDemand]: 263/266 looper letters, 26 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2023-08-03 22:11:31,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 128 flow [2023-08-03 22:11:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-03 22:11:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-03 22:11:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 261 transitions. [2023-08-03 22:11:31,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906015037593985 [2023-08-03 22:11:31,890 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 261 transitions. [2023-08-03 22:11:31,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 261 transitions. [2023-08-03 22:11:31,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:11:31,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 261 transitions. [2023-08-03 22:11:31,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 130.5) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:31,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:31,893 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:31,894 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 84 flow. Second operand 2 states and 261 transitions. [2023-08-03 22:11:31,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 128 flow [2023-08-03 22:11:31,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 128 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:11:31,897 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 76 flow [2023-08-03 22:11:31,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=76, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-03 22:11:31,898 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2023-08-03 22:11:31,899 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 76 flow [2023-08-03 22:11:31,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 116.5) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:31,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:11:31,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 22:11:31,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:11:31,899 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:11:31,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:11:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash 25726477, now seen corresponding path program 1 times [2023-08-03 22:11:31,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:11:31,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144220609] [2023-08-03 22:11:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:31,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:11:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:11:31,970 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 22:11:31,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:11:31,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144220609] [2023-08-03 22:11:31,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144220609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:11:31,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:11:31,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:11:31,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989181230] [2023-08-03 22:11:31,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:11:31,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:11:31,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:11:31,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:11:31,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:11:31,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 266 [2023-08-03 22:11:31,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:31,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:11:31,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 266 [2023-08-03 22:11:31,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:11:32,101 INFO L124 PetriNetUnfolderBase]: 637/1091 cut-off events. [2023-08-03 22:11:32,102 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-03 22:11:32,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2207 conditions, 1091 events. 637/1091 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4890 event pairs, 585 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 2202. Up to 1067 conditions per place. [2023-08-03 22:11:32,107 INFO L140 encePairwiseOnDemand]: 263/266 looper letters, 25 selfloop transitions, 0 changer transitions 2/30 dead transitions. [2023-08-03 22:11:32,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 132 flow [2023-08-03 22:11:32,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:11:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:11:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2023-08-03 22:11:32,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2023-08-03 22:11:32,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 361 transitions. [2023-08-03 22:11:32,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 361 transitions. [2023-08-03 22:11:32,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:11:32,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 361 transitions. [2023-08-03 22:11:32,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,116 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,118 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 76 flow. Second operand 3 states and 361 transitions. [2023-08-03 22:11:32,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 132 flow [2023-08-03 22:11:32,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 132 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:11:32,120 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 78 flow [2023-08-03 22:11:32,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-03 22:11:32,123 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2023-08-03 22:11:32,123 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 78 flow [2023-08-03 22:11:32,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:11:32,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 22:11:32,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 22:11:32,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:11:32,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:11:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash 797015467, now seen corresponding path program 1 times [2023-08-03 22:11:32,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:11:32,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091906241] [2023-08-03 22:11:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:32,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:11:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:11:32,186 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 22:11:32,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:11:32,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091906241] [2023-08-03 22:11:32,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091906241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:11:32,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:11:32,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:11:32,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839499506] [2023-08-03 22:11:32,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:11:32,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:11:32,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:11:32,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:11:32,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:11:32,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 266 [2023-08-03 22:11:32,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:11:32,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 266 [2023-08-03 22:11:32,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:11:32,304 INFO L124 PetriNetUnfolderBase]: 634/1088 cut-off events. [2023-08-03 22:11:32,304 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2023-08-03 22:11:32,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2287 conditions, 1088 events. 634/1088 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4857 event pairs, 270 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 2280. Up to 1055 conditions per place. [2023-08-03 22:11:32,309 INFO L140 encePairwiseOnDemand]: 263/266 looper letters, 30 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-03 22:11:32,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 156 flow [2023-08-03 22:11:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:11:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:11:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-03 22:11:32,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.462406015037594 [2023-08-03 22:11:32,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-03 22:11:32,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-03 22:11:32,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:11:32,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-03 22:11:32,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,314 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 78 flow. Second operand 3 states and 369 transitions. [2023-08-03 22:11:32,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 156 flow [2023-08-03 22:11:32,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 152 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 22:11:32,317 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 86 flow [2023-08-03 22:11:32,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-03 22:11:32,319 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-03 22:11:32,319 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 86 flow [2023-08-03 22:11:32,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:11:32,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 22:11:32,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 22:11:32,320 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:11:32,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:11:32,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1063295029, now seen corresponding path program 1 times [2023-08-03 22:11:32,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:11:32,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546047008] [2023-08-03 22:11:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:32,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:11:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:11:32,416 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 22:11:32,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:11:32,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546047008] [2023-08-03 22:11:32,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546047008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:11:32,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:11:32,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:11:32,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549731992] [2023-08-03 22:11:32,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:11:32,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:11:32,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:11:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:11:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:11:32,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 266 [2023-08-03 22:11:32,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:11:32,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 266 [2023-08-03 22:11:32,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:11:32,542 INFO L124 PetriNetUnfolderBase]: 547/1018 cut-off events. [2023-08-03 22:11:32,543 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-08-03 22:11:32,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2127 conditions, 1018 events. 547/1018 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5027 event pairs, 163 based on Foata normal form. 0/858 useless extension candidates. Maximal degree in co-relation 2119. Up to 648 conditions per place. [2023-08-03 22:11:32,547 INFO L140 encePairwiseOnDemand]: 259/266 looper letters, 38 selfloop transitions, 4 changer transitions 3/47 dead transitions. [2023-08-03 22:11:32,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 222 flow [2023-08-03 22:11:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:11:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:11:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-03 22:11:32,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699248120300752 [2023-08-03 22:11:32,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-03 22:11:32,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-03 22:11:32,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:11:32,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-03 22:11:32,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,552 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,552 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 86 flow. Second operand 3 states and 375 transitions. [2023-08-03 22:11:32,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 222 flow [2023-08-03 22:11:32,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:11:32,554 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 114 flow [2023-08-03 22:11:32,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-08-03 22:11:32,555 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-03 22:11:32,555 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 114 flow [2023-08-03 22:11:32,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:11:32,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:11:32,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 22:11:32,556 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:11:32,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:11:32,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1981343018, now seen corresponding path program 1 times [2023-08-03 22:11:32,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:11:32,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398314831] [2023-08-03 22:11:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:32,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:11:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:11:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:11:32,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:11:32,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398314831] [2023-08-03 22:11:32,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398314831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:11:32,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043892689] [2023-08-03 22:11:32,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:32,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:11:32,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:11:32,613 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 22:11:32,640 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 22:11:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:11:32,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 22:11:32,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:11:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:11:32,725 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:11:32,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043892689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:11:32,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:11:32,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 22:11:32,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993374436] [2023-08-03 22:11:32,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:11:32,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:11:32,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:11:32,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:11:32,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:11:32,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 266 [2023-08-03 22:11:32,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:11:32,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 266 [2023-08-03 22:11:32,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:11:32,818 INFO L124 PetriNetUnfolderBase]: 294/584 cut-off events. [2023-08-03 22:11:32,818 INFO L125 PetriNetUnfolderBase]: For 236/236 co-relation queries the response was YES. [2023-08-03 22:11:32,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1448 conditions, 584 events. 294/584 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2479 event pairs, 179 based on Foata normal form. 30/613 useless extension candidates. Maximal degree in co-relation 1439. Up to 401 conditions per place. [2023-08-03 22:11:32,821 INFO L140 encePairwiseOnDemand]: 263/266 looper letters, 40 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-03 22:11:32,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 44 transitions, 242 flow [2023-08-03 22:11:32,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:11:32,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:11:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2023-08-03 22:11:32,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4674185463659148 [2023-08-03 22:11:32,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 373 transitions. [2023-08-03 22:11:32,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 373 transitions. [2023-08-03 22:11:32,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:11:32,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 373 transitions. [2023-08-03 22:11:32,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,826 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 114 flow. Second operand 3 states and 373 transitions. [2023-08-03 22:11:32,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 44 transitions, 242 flow [2023-08-03 22:11:32,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 44 transitions, 227 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 22:11:32,829 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 112 flow [2023-08-03 22:11:32,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-08-03 22:11:32,829 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-08-03 22:11:32,830 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 112 flow [2023-08-03 22:11:32,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:32,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:11:32,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:11:32,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 22:11:33,035 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,SelfDestructingSolverStorable6 [2023-08-03 22:11:33,035 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:11:33,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:11:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1403592532, now seen corresponding path program 1 times [2023-08-03 22:11:33,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:11:33,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908852079] [2023-08-03 22:11:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:33,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:11:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:11:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:11:33,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:11:33,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908852079] [2023-08-03 22:11:33,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908852079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:11:33,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612915512] [2023-08-03 22:11:33,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:33,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:11:33,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:11:33,137 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 22:11:33,167 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 22:11:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:11:33,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:11:33,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:11:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:11:33,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:11:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:11:33,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612915512] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:11:33,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:11:33,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:11:33,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981273801] [2023-08-03 22:11:33,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:11:33,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:11:33,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:11:33,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:11:33,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:11:33,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 266 [2023-08-03 22:11:33,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:33,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:11:33,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 266 [2023-08-03 22:11:33,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:11:33,392 INFO L124 PetriNetUnfolderBase]: 281/555 cut-off events. [2023-08-03 22:11:33,392 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-08-03 22:11:33,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1384 conditions, 555 events. 281/555 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2186 event pairs, 31 based on Foata normal form. 5/556 useless extension candidates. Maximal degree in co-relation 1374. Up to 404 conditions per place. [2023-08-03 22:11:33,395 INFO L140 encePairwiseOnDemand]: 262/266 looper letters, 41 selfloop transitions, 3 changer transitions 1/47 dead transitions. [2023-08-03 22:11:33,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 246 flow [2023-08-03 22:11:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:11:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:11:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 484 transitions. [2023-08-03 22:11:33,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4548872180451128 [2023-08-03 22:11:33,397 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 484 transitions. [2023-08-03 22:11:33,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 484 transitions. [2023-08-03 22:11:33,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:11:33,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 484 transitions. [2023-08-03 22:11:33,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:33,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:33,400 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:33,401 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 112 flow. Second operand 4 states and 484 transitions. [2023-08-03 22:11:33,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 246 flow [2023-08-03 22:11:33,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:11:33,403 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 124 flow [2023-08-03 22:11:33,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-08-03 22:11:33,404 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-08-03 22:11:33,404 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 124 flow [2023-08-03 22:11:33,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:33,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:11:33,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:11:33,412 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 22:11:33,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:11:33,610 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:11:33,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:11:33,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1767119810, now seen corresponding path program 1 times [2023-08-03 22:11:33,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:11:33,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653021745] [2023-08-03 22:11:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:33,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:11:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:11:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:11:33,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:11:33,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653021745] [2023-08-03 22:11:33,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653021745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:11:33,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772725262] [2023-08-03 22:11:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:33,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:11:33,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:11:33,684 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 22:11:33,687 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 22:11:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:11:33,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:11:33,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:11:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:11:33,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:11:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:11:33,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772725262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:11:33,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:11:33,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 22:11:33,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930530835] [2023-08-03 22:11:33,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:11:33,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:11:33,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:11:33,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:11:33,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:11:33,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 266 [2023-08-03 22:11:33,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:33,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:11:33,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 266 [2023-08-03 22:11:33,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:11:33,935 INFO L124 PetriNetUnfolderBase]: 213/407 cut-off events. [2023-08-03 22:11:33,935 INFO L125 PetriNetUnfolderBase]: For 346/346 co-relation queries the response was YES. [2023-08-03 22:11:33,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 407 events. 213/407 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1439 event pairs, 99 based on Foata normal form. 10/416 useless extension candidates. Maximal degree in co-relation 1092. Up to 205 conditions per place. [2023-08-03 22:11:33,938 INFO L140 encePairwiseOnDemand]: 262/266 looper letters, 43 selfloop transitions, 3 changer transitions 2/50 dead transitions. [2023-08-03 22:11:33,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 273 flow [2023-08-03 22:11:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:11:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:11:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 488 transitions. [2023-08-03 22:11:33,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45864661654135336 [2023-08-03 22:11:33,940 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 488 transitions. [2023-08-03 22:11:33,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 488 transitions. [2023-08-03 22:11:33,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:11:33,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 488 transitions. [2023-08-03 22:11:33,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:33,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:33,943 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:33,943 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 124 flow. Second operand 4 states and 488 transitions. [2023-08-03 22:11:33,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 273 flow [2023-08-03 22:11:33,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 262 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 22:11:33,945 INFO L231 Difference]: Finished difference. Result has 41 places, 27 transitions, 114 flow [2023-08-03 22:11:33,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=27} [2023-08-03 22:11:33,946 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-08-03 22:11:33,946 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 27 transitions, 114 flow [2023-08-03 22:11:33,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:33,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:11:33,946 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:11:33,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 22:11:34,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:11:34,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-03 22:11:34,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:11:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1483957517, now seen corresponding path program 1 times [2023-08-03 22:11:34,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:11:34,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408656169] [2023-08-03 22:11:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:11:34,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:11:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:11:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 22:11:34,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:11:34,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408656169] [2023-08-03 22:11:34,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408656169] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:11:34,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:11:34,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:11:34,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449526576] [2023-08-03 22:11:34,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:11:34,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:11:34,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:11:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:11:34,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:11:34,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 266 [2023-08-03 22:11:34,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 27 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:34,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:11:34,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 266 [2023-08-03 22:11:34,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:11:34,323 INFO L124 PetriNetUnfolderBase]: 213/404 cut-off events. [2023-08-03 22:11:34,323 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2023-08-03 22:11:34,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 404 events. 213/404 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1427 event pairs, 195 based on Foata normal form. 1/404 useless extension candidates. Maximal degree in co-relation 1126. Up to 388 conditions per place. [2023-08-03 22:11:34,324 INFO L140 encePairwiseOnDemand]: 264/266 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-08-03 22:11:34,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 26 transitions, 160 flow [2023-08-03 22:11:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:11:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:11:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-03 22:11:34,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398496240601504 [2023-08-03 22:11:34,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-03 22:11:34,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-03 22:11:34,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:11:34,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-03 22:11:34,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:34,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:34,329 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:34,329 INFO L175 Difference]: Start difference. First operand has 41 places, 27 transitions, 114 flow. Second operand 3 states and 351 transitions. [2023-08-03 22:11:34,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 26 transitions, 160 flow [2023-08-03 22:11:34,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 26 transitions, 154 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 22:11:34,330 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-03 22:11:34,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-03 22:11:34,331 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-08-03 22:11:34,331 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-03 22:11:34,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:11:34,331 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-03 22:11:34,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-03 22:11:34,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-03 22:11:34,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-03 22:11:34,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-03 22:11:34,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-03 22:11:34,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 22:11:34,332 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:11:34,333 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (2/2) [2023-08-03 22:11:34,335 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 22:11:34,335 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 22:11:34,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 10:11:34 BasicIcfg [2023-08-03 22:11:34,338 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 22:11:34,339 INFO L158 Benchmark]: Toolchain (without parser) took 13149.51ms. Allocated memory was 599.8MB in the beginning and 748.7MB in the end (delta: 148.9MB). Free memory was 542.7MB in the beginning and 609.1MB in the end (delta: -66.4MB). Peak memory consumption was 83.6MB. Max. memory is 16.0GB. [2023-08-03 22:11:34,339 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 350.2MB. Free memory is still 296.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 22:11:34,339 INFO L158 Benchmark]: CACSL2BoogieTranslator took 755.28ms. Allocated memory is still 599.8MB. Free memory was 542.3MB in the beginning and 552.0MB in the end (delta: -9.7MB). Peak memory consumption was 57.9MB. Max. memory is 16.0GB. [2023-08-03 22:11:34,339 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.70ms. Allocated memory is still 599.8MB. Free memory was 552.0MB in the beginning and 548.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:11:34,340 INFO L158 Benchmark]: Boogie Preprocessor took 31.57ms. Allocated memory is still 599.8MB. Free memory was 548.9MB in the beginning and 545.7MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-03 22:11:34,340 INFO L158 Benchmark]: RCFGBuilder took 470.00ms. Allocated memory is still 599.8MB. Free memory was 545.7MB in the beginning and 525.8MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 22:11:34,340 INFO L158 Benchmark]: TraceAbstraction took 11812.06ms. Allocated memory was 599.8MB in the beginning and 748.7MB in the end (delta: 148.9MB). Free memory was 524.7MB in the beginning and 609.1MB in the end (delta: -84.4MB). Peak memory consumption was 63.5MB. Max. memory is 16.0GB. [2023-08-03 22:11:34,341 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 350.2MB. Free memory is still 296.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 755.28ms. Allocated memory is still 599.8MB. Free memory was 542.3MB in the beginning and 552.0MB in the end (delta: -9.7MB). Peak memory consumption was 57.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 73.70ms. Allocated memory is still 599.8MB. Free memory was 552.0MB in the beginning and 548.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.57ms. Allocated memory is still 599.8MB. Free memory was 548.9MB in the beginning and 545.7MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * RCFGBuilder took 470.00ms. Allocated memory is still 599.8MB. Free memory was 545.7MB in the beginning and 525.8MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 11812.06ms. Allocated memory was 599.8MB in the beginning and 748.7MB in the end (delta: 148.9MB). Free memory was 524.7MB in the beginning and 609.1MB in the end (delta: -84.4MB). Peak memory consumption was 63.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] - GenericResultAtLocation [Line: 729]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [729] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 92 PlacesBefore, 15 PlacesAfterwards, 95 TransitionsBefore, 13 TransitionsAfterwards, 1260 CoEnabledTransitionPairs, 7 FixpointIterations, 38 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 11 ConcurrentYvCompositions, 5 ChoiceCompositions, 107 TotalNumberOfCompositions, 1471 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1247, independent: 1197, independent conditional: 0, independent unconditional: 1197, dependent: 50, dependent conditional: 0, dependent unconditional: 50, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 737, independent: 721, independent conditional: 0, independent unconditional: 721, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1247, independent: 476, independent conditional: 0, independent unconditional: 476, dependent: 34, dependent conditional: 0, dependent unconditional: 34, unknown: 737, unknown conditional: 0, unknown unconditional: 737] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 17, Positive conditional cache size: 0, Positive unconditional cache size: 17, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 115 PlacesBefore, 31 PlacesAfterwards, 119 TransitionsBefore, 32 TransitionsAfterwards, 3420 CoEnabledTransitionPairs, 6 FixpointIterations, 35 TrivialSequentialCompositions, 60 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 17 ConcurrentYvCompositions, 3 ChoiceCompositions, 120 TotalNumberOfCompositions, 7021 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4611, independent: 4465, independent conditional: 0, independent unconditional: 4465, dependent: 146, dependent conditional: 0, dependent unconditional: 146, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2030, independent: 1995, independent conditional: 0, independent unconditional: 1995, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4611, independent: 2470, independent conditional: 0, independent unconditional: 2470, dependent: 111, dependent conditional: 0, dependent unconditional: 111, unknown: 2030, unknown conditional: 0, unknown unconditional: 2030] , Statistics on independence cache: Total cache size (in pairs): 202, Positive cache size: 182, Positive conditional cache size: 0, Positive unconditional cache size: 182, 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 126 PlacesBefore, 33 PlacesAfterwards, 132 TransitionsBefore, 33 TransitionsAfterwards, 3420 CoEnabledTransitionPairs, 7 FixpointIterations, 54 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 17 ConcurrentYvCompositions, 6 ChoiceCompositions, 134 TotalNumberOfCompositions, 6804 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4529, independent: 4374, independent conditional: 0, independent unconditional: 4374, dependent: 155, dependent conditional: 0, dependent unconditional: 155, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1981, independent: 1951, independent conditional: 0, independent unconditional: 1951, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4529, independent: 2423, independent conditional: 0, independent unconditional: 2423, dependent: 125, dependent conditional: 0, dependent unconditional: 125, unknown: 1981, unknown conditional: 0, unknown unconditional: 1981] , Statistics on independence cache: Total cache size (in pairs): 161, Positive cache size: 146, Positive conditional cache size: 0, Positive unconditional cache size: 146, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 1693]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 1693]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 1693]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 1693]: 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 for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 122 locations, 6 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: 2.9s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 137 locations, 7 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: 3.4s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 61 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 52 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 85 IncrementalHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 85 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=0, InterpolantAutomatonStates: 5, 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, 0.2s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 135 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 11/16 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 1 thread instances CFG has 4 procedures, 137 locations, 7 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: 5.4s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 191 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 113 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 517 IncrementalHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 22 mSDtfsCounter, 517 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=6, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 139 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 264 SizeOfPredicates, 0 NumberOfNonLiveVariables, 492 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 33/40 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 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 22:11:34,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...