/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-ext/03_incdec.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:42:54,612 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:42:54,674 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 11:42:54,677 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:42:54,678 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:42:54,702 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:42:54,702 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:42:54,708 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:42:54,709 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:42:54,712 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:42:54,712 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:42:54,712 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:42:54,712 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:42:54,713 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:42:54,713 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:42:54,713 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:42:54,714 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:42:54,714 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:42:54,714 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:42:54,714 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:42:54,714 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:42:54,714 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:42:54,714 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:42:54,715 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:42:54,715 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:42:54,715 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:42:54,715 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:42:54,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:42:54,716 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:42:54,716 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:42:54,716 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:42:54,716 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:42:54,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:42:54,717 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:42:54,717 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:42:54,717 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:42:54,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:42:54,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:42:54,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:42:54,955 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:42:54,955 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:42:54,956 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-08-26 11:42:55,905 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:42:56,090 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:42:56,091 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-08-26 11:42:56,100 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9d839851/fb44590153334cd080b5e10ee3dc13fc/FLAG018c614ea [2023-08-26 11:42:56,113 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9d839851/fb44590153334cd080b5e10ee3dc13fc [2023-08-26 11:42:56,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:42:56,118 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:42:56,118 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:42:56,119 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:42:56,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:42:56,121 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:42:56" (1/1) ... [2023-08-26 11:42:56,121 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26b19c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56, skipping insertion in model container [2023-08-26 11:42:56,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:42:56" (1/1) ... [2023-08-26 11:42:56,161 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:42:56,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:42:56,420 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:42:56,443 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 11:42:56,445 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 11:42:56,450 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [689] [2023-08-26 11:42:56,451 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [700] [2023-08-26 11:42:56,452 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [701] [2023-08-26 11:42:56,452 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: inline unsigned [702] [2023-08-26 11:42:56,452 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [703] [2023-08-26 11:42:56,456 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: inline unsigned [716] [2023-08-26 11:42:56,456 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [717] [2023-08-26 11:42:56,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:42:56,495 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:42:56,495 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56 WrapperNode [2023-08-26 11:42:56,495 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:42:56,496 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:42:56,496 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:42:56,496 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:42:56,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56" (1/1) ... [2023-08-26 11:42:56,523 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56" (1/1) ... [2023-08-26 11:42:56,546 INFO L138 Inliner]: procedures = 172, calls = 26, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 140 [2023-08-26 11:42:56,547 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:42:56,547 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:42:56,547 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:42:56,547 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:42:56,553 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56" (1/1) ... [2023-08-26 11:42:56,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56" (1/1) ... [2023-08-26 11:42:56,565 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56" (1/1) ... [2023-08-26 11:42:56,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56" (1/1) ... [2023-08-26 11:42:56,569 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56" (1/1) ... [2023-08-26 11:42:56,571 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56" (1/1) ... [2023-08-26 11:42:56,572 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56" (1/1) ... [2023-08-26 11:42:56,572 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56" (1/1) ... [2023-08-26 11:42:56,574 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:42:56,575 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:42:56,575 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:42:56,575 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:42:56,575 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56" (1/1) ... [2023-08-26 11:42:56,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:42:56,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:42:56,607 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) [2023-08-26 11:42:56,622 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 [2023-08-26 11:42:56,633 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 11:42:56,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 11:42:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:42:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:42:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:42:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:42:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:42:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:42:56,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:42:56,636 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 11:42:56,716 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:42:56,717 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:42:56,951 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:42:56,999 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:42:56,999 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 11:42:57,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:42:57 BoogieIcfgContainer [2023-08-26 11:42:57,001 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:42:57,002 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:42:57,002 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:42:57,004 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:42:57,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:42:56" (1/3) ... [2023-08-26 11:42:57,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c9f511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:42:57, skipping insertion in model container [2023-08-26 11:42:57,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:56" (2/3) ... [2023-08-26 11:42:57,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c9f511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:42:57, skipping insertion in model container [2023-08-26 11:42:57,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:42:57" (3/3) ... [2023-08-26 11:42:57,006 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec.i [2023-08-26 11:42:57,021 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:42:57,021 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-26 11:42:57,021 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:42:57,073 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:42:57,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 91 transitions, 187 flow [2023-08-26 11:42:57,121 INFO L124 PetriNetUnfolderBase]: 9/103 cut-off events. [2023-08-26 11:42:57,121 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:42:57,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 103 events. 9/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 199 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2023-08-26 11:42:57,125 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 91 transitions, 187 flow [2023-08-26 11:42:57,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 91 transitions, 187 flow [2023-08-26 11:42:57,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:42:57,138 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 91 transitions, 187 flow [2023-08-26 11:42:57,141 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 91 transitions, 187 flow [2023-08-26 11:42:57,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 91 transitions, 187 flow [2023-08-26 11:42:57,171 INFO L124 PetriNetUnfolderBase]: 9/103 cut-off events. [2023-08-26 11:42:57,171 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:42:57,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 103 events. 9/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 199 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2023-08-26 11:42:57,174 INFO L119 LiptonReduction]: Number of co-enabled transitions 1830 [2023-08-26 11:43:01,131 INFO L134 LiptonReduction]: Checked pairs total: 1908 [2023-08-26 11:43:01,131 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-26 11:43:01,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:43:01,143 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=false, 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;@f70d384, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:43:01,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 11:43:01,145 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:43:01,145 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-08-26 11:43:01,145 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:43:01,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:01,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:43:01,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:43:01,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:01,149 INFO L85 PathProgramCache]: Analyzing trace with hash 19654, now seen corresponding path program 1 times [2023-08-26 11:43:01,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:01,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072459357] [2023-08-26 11:43:01,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:01,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:43:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:43:01,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:43:01,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072459357] [2023-08-26 11:43:01,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072459357] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:43:01,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:43:01,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:43:01,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026718651] [2023-08-26 11:43:01,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:43:01,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:43:01,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:43:01,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:43:01,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:43:01,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 220 [2023-08-26 11:43:01,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 27 flow. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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) [2023-08-26 11:43:01,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:43:01,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 220 [2023-08-26 11:43:01,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:43:01,350 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-26 11:43:01,350 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:43:01,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 16 events. 3/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 3 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 20. Up to 14 conditions per place. [2023-08-26 11:43:01,351 INFO L140 encePairwiseOnDemand]: 215/220 looper letters, 5 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2023-08-26 11:43:01,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 7 transitions, 31 flow [2023-08-26 11:43:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:43:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:43:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-08-26 11:43:01,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.296969696969697 [2023-08-26 11:43:01,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-08-26 11:43:01,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-08-26 11:43:01,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:43:01,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-08-26 11:43:01,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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) [2023-08-26 11:43:01,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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) [2023-08-26 11:43:01,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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) [2023-08-26 11:43:01,374 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 27 flow. Second operand 3 states and 196 transitions. [2023-08-26 11:43:01,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 7 transitions, 31 flow [2023-08-26 11:43:01,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:43:01,376 INFO L231 Difference]: Finished difference. Result has 12 places, 7 transitions, 21 flow [2023-08-26 11:43:01,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=21, PETRI_PLACES=12, PETRI_TRANSITIONS=7} [2023-08-26 11:43:01,379 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-08-26 11:43:01,379 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 7 transitions, 21 flow [2023-08-26 11:43:01,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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) [2023-08-26 11:43:01,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:01,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:43:01,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:43:01,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:43:01,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:01,381 INFO L85 PathProgramCache]: Analyzing trace with hash 19655, now seen corresponding path program 1 times [2023-08-26 11:43:01,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:01,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840203325] [2023-08-26 11:43:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:01,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:43:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:43:01,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:43:01,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840203325] [2023-08-26 11:43:01,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840203325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:43:01,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:43:01,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:43:01,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930318274] [2023-08-26 11:43:01,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:43:01,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:43:01,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:43:01,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:43:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:43:01,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 220 [2023-08-26 11:43:01,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 7 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2023-08-26 11:43:01,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:43:01,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 220 [2023-08-26 11:43:01,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:43:01,477 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-26 11:43:01,477 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:43:01,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 24. Up to 10 conditions per place. [2023-08-26 11:43:01,478 INFO L140 encePairwiseOnDemand]: 218/220 looper letters, 4 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2023-08-26 11:43:01,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 6 transitions, 29 flow [2023-08-26 11:43:01,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:43:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:43:01,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2023-08-26 11:43:01,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29545454545454547 [2023-08-26 11:43:01,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 195 transitions. [2023-08-26 11:43:01,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 195 transitions. [2023-08-26 11:43:01,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:43:01,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 195 transitions. [2023-08-26 11:43:01,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2023-08-26 11:43:01,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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) [2023-08-26 11:43:01,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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) [2023-08-26 11:43:01,482 INFO L175 Difference]: Start difference. First operand has 12 places, 7 transitions, 21 flow. Second operand 3 states and 195 transitions. [2023-08-26 11:43:01,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 6 transitions, 29 flow [2023-08-26 11:43:01,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 6 transitions, 28 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:43:01,483 INFO L231 Difference]: Finished difference. Result has 12 places, 6 transitions, 20 flow [2023-08-26 11:43:01,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=12, PETRI_TRANSITIONS=6} [2023-08-26 11:43:01,484 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-08-26 11:43:01,484 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 6 transitions, 20 flow [2023-08-26 11:43:01,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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) [2023-08-26 11:43:01,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:01,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 11:43:01,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:43:01,485 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:43:01,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash 984668801, now seen corresponding path program 1 times [2023-08-26 11:43:01,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:01,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527431407] [2023-08-26 11:43:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:01,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:43:01,495 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:43:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:43:01,511 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:43:01,511 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:43:01,511 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-26 11:43:01,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 7 remaining) [2023-08-26 11:43:01,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (4 of 7 remaining) [2023-08-26 11:43:01,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-26 11:43:01,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-26 11:43:01,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 7 remaining) [2023-08-26 11:43:01,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (0 of 7 remaining) [2023-08-26 11:43:01,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:43:01,514 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 11:43:01,515 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:43:01,515 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 11:43:01,536 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:43:01,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 153 transitions, 318 flow [2023-08-26 11:43:01,563 INFO L124 PetriNetUnfolderBase]: 17/179 cut-off events. [2023-08-26 11:43:01,563 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:43:01,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 179 events. 17/179 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 571 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 136. Up to 6 conditions per place. [2023-08-26 11:43:01,565 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 153 transitions, 318 flow [2023-08-26 11:43:01,566 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 153 transitions, 318 flow [2023-08-26 11:43:01,566 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:43:01,566 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 153 transitions, 318 flow [2023-08-26 11:43:01,566 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 153 transitions, 318 flow [2023-08-26 11:43:01,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 153 transitions, 318 flow [2023-08-26 11:43:01,589 INFO L124 PetriNetUnfolderBase]: 17/179 cut-off events. [2023-08-26 11:43:01,589 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:43:01,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 179 events. 17/179 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 571 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 136. Up to 6 conditions per place. [2023-08-26 11:43:01,597 INFO L119 LiptonReduction]: Number of co-enabled transitions 11224 [2023-08-26 11:43:03,736 INFO L134 LiptonReduction]: Checked pairs total: 37045 [2023-08-26 11:43:03,736 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-08-26 11:43:03,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:43:03,739 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=false, 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;@f70d384, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:43:03,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-26 11:43:03,739 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:43:03,739 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:43:03,739 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:43:03,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:03,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:43:03,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:43:03,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:03,740 INFO L85 PathProgramCache]: Analyzing trace with hash 31661, now seen corresponding path program 1 times [2023-08-26 11:43:03,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:03,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115666642] [2023-08-26 11:43:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:03,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:43:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:43:03,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:43:03,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115666642] [2023-08-26 11:43:03,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115666642] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:43:03,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:43:03,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:43:03,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696784008] [2023-08-26 11:43:03,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:43:03,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:43:03,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:43:03,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:43:03,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:43:03,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 297 [2023-08-26 11:43:03,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 74 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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) [2023-08-26 11:43:03,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:43:03,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 297 [2023-08-26 11:43:03,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:43:03,914 INFO L124 PetriNetUnfolderBase]: 777/1514 cut-off events. [2023-08-26 11:43:03,914 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-08-26 11:43:03,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2741 conditions, 1514 events. 777/1514 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10124 event pairs, 570 based on Foata normal form. 69/1214 useless extension candidates. Maximal degree in co-relation 826. Up to 1176 conditions per place. [2023-08-26 11:43:03,921 INFO L140 encePairwiseOnDemand]: 286/297 looper letters, 30 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-26 11:43:03,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 190 flow [2023-08-26 11:43:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:43:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:43:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-26 11:43:03,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409652076318743 [2023-08-26 11:43:03,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-26 11:43:03,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-26 11:43:03,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:43:03,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-26 11:43:03,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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) [2023-08-26 11:43:03,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 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) [2023-08-26 11:43:03,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 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) [2023-08-26 11:43:03,926 INFO L175 Difference]: Start difference. First operand has 65 places, 74 transitions, 160 flow. Second operand 3 states and 365 transitions. [2023-08-26 11:43:03,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 190 flow [2023-08-26 11:43:03,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 188 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 11:43:03,928 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 128 flow [2023-08-26 11:43:03,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2023-08-26 11:43:03,928 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-08-26 11:43:03,929 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 128 flow [2023-08-26 11:43:03,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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) [2023-08-26 11:43:03,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:03,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:43:03,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:43:03,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:43:03,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:03,930 INFO L85 PathProgramCache]: Analyzing trace with hash 31660, now seen corresponding path program 1 times [2023-08-26 11:43:03,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:03,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515995473] [2023-08-26 11:43:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:03,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:43:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:43:03,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:43:03,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515995473] [2023-08-26 11:43:03,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515995473] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:43:03,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:43:03,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:43:03,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981205133] [2023-08-26 11:43:03,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:43:03,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:43:03,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:43:03,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:43:03,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:43:03,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 297 [2023-08-26 11:43:03,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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) [2023-08-26 11:43:03,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:43:03,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 297 [2023-08-26 11:43:03,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:43:04,025 INFO L124 PetriNetUnfolderBase]: 478/976 cut-off events. [2023-08-26 11:43:04,026 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-26 11:43:04,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 976 events. 478/976 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6013 event pairs, 340 based on Foata normal form. 0/812 useless extension candidates. Maximal degree in co-relation 1759. Up to 744 conditions per place. [2023-08-26 11:43:04,030 INFO L140 encePairwiseOnDemand]: 295/297 looper letters, 29 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-08-26 11:43:04,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 57 transitions, 186 flow [2023-08-26 11:43:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:43:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:43:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-08-26 11:43:04,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950617283950617 [2023-08-26 11:43:04,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-08-26 11:43:04,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-08-26 11:43:04,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:43:04,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-08-26 11:43:04,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 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) [2023-08-26 11:43:04,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 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) [2023-08-26 11:43:04,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 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) [2023-08-26 11:43:04,040 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 128 flow. Second operand 3 states and 352 transitions. [2023-08-26 11:43:04,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 57 transitions, 186 flow [2023-08-26 11:43:04,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:43:04,042 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 127 flow [2023-08-26 11:43:04,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-08-26 11:43:04,043 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-08-26 11:43:04,043 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 127 flow [2023-08-26 11:43:04,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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) [2023-08-26 11:43:04,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:04,044 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 11:43:04,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:43:04,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:43:04,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:04,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1649631527, now seen corresponding path program 1 times [2023-08-26 11:43:04,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:04,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855532965] [2023-08-26 11:43:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:04,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:43:04,060 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:43:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:43:04,075 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:43:04,076 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:43:04,076 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-26 11:43:04,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (7 of 9 remaining) [2023-08-26 11:43:04,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (6 of 9 remaining) [2023-08-26 11:43:04,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-26 11:43:04,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-08-26 11:43:04,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 9 remaining) [2023-08-26 11:43:04,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (2 of 9 remaining) [2023-08-26 11:43:04,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 9 remaining) [2023-08-26 11:43:04,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (0 of 9 remaining) [2023-08-26 11:43:04,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:43:04,077 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 11:43:04,077 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:43:04,078 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 11:43:04,106 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:43:04,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 215 transitions, 451 flow [2023-08-26 11:43:04,131 INFO L124 PetriNetUnfolderBase]: 25/255 cut-off events. [2023-08-26 11:43:04,131 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:43:04,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 255 events. 25/255 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 955 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2023-08-26 11:43:04,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 215 transitions, 451 flow [2023-08-26 11:43:04,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 215 transitions, 451 flow [2023-08-26 11:43:04,134 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:43:04,135 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 215 transitions, 451 flow [2023-08-26 11:43:04,136 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 215 transitions, 451 flow [2023-08-26 11:43:04,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 215 transitions, 451 flow [2023-08-26 11:43:04,154 INFO L124 PetriNetUnfolderBase]: 25/255 cut-off events. [2023-08-26 11:43:04,154 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:43:04,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 255 events. 25/255 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 955 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2023-08-26 11:43:04,164 INFO L119 LiptonReduction]: Number of co-enabled transitions 28182 [2023-08-26 11:43:07,008 INFO L134 LiptonReduction]: Checked pairs total: 105116 [2023-08-26 11:43:07,008 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-08-26 11:43:07,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:43:07,010 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=false, 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;@f70d384, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:43:07,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 11:43:07,011 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:43:07,011 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 11:43:07,011 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:43:07,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:07,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:43:07,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:43:07,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:07,011 INFO L85 PathProgramCache]: Analyzing trace with hash 46654, now seen corresponding path program 1 times [2023-08-26 11:43:07,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:07,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029712300] [2023-08-26 11:43:07,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:07,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:43:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:43:07,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:43:07,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029712300] [2023-08-26 11:43:07,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029712300] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:43:07,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:43:07,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:43:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48649159] [2023-08-26 11:43:07,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:43:07,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:43:07,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:43:07,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:43:07,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:43:07,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 409 [2023-08-26 11:43:07,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 101 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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) [2023-08-26 11:43:07,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:43:07,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 409 [2023-08-26 11:43:07,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:43:08,707 INFO L124 PetriNetUnfolderBase]: 16074/25397 cut-off events. [2023-08-26 11:43:08,707 INFO L125 PetriNetUnfolderBase]: For 1021/1021 co-relation queries the response was YES. [2023-08-26 11:43:08,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47423 conditions, 25397 events. 16074/25397 cut-off events. For 1021/1021 co-relation queries the response was YES. Maximal size of possible extension queue 1530. Compared 204497 event pairs, 12186 based on Foata normal form. 1695/20774 useless extension candidates. Maximal degree in co-relation 4354. Up to 21264 conditions per place. [2023-08-26 11:43:08,825 INFO L140 encePairwiseOnDemand]: 397/409 looper letters, 46 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-08-26 11:43:08,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 85 transitions, 285 flow [2023-08-26 11:43:08,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:43:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:43:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-26 11:43:08,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213528932355338 [2023-08-26 11:43:08,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-26 11:43:08,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-26 11:43:08,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:43:08,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-26 11:43:08,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 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) [2023-08-26 11:43:08,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-08-26 11:43:08,831 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-08-26 11:43:08,831 INFO L175 Difference]: Start difference. First operand has 90 places, 101 transitions, 223 flow. Second operand 3 states and 517 transitions. [2023-08-26 11:43:08,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 85 transitions, 285 flow [2023-08-26 11:43:08,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 85 transitions, 279 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-26 11:43:08,837 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 187 flow [2023-08-26 11:43:08,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=187, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2023-08-26 11:43:08,838 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, -5 predicate places. [2023-08-26 11:43:08,840 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 187 flow [2023-08-26 11:43:08,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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) [2023-08-26 11:43:08,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:08,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:43:08,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:43:08,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:43:08,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:08,845 INFO L85 PathProgramCache]: Analyzing trace with hash 46653, now seen corresponding path program 1 times [2023-08-26 11:43:08,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:08,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955509360] [2023-08-26 11:43:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:08,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:43:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:43:08,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:43:08,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955509360] [2023-08-26 11:43:08,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955509360] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:43:08,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:43:08,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:43:08,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103132263] [2023-08-26 11:43:08,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:43:08,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:43:08,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:43:08,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:43:08,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:43:08,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 409 [2023-08-26 11:43:08,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 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) [2023-08-26 11:43:08,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:43:08,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 409 [2023-08-26 11:43:08,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:43:09,833 INFO L124 PetriNetUnfolderBase]: 10192/16460 cut-off events. [2023-08-26 11:43:09,833 INFO L125 PetriNetUnfolderBase]: For 454/454 co-relation queries the response was YES. [2023-08-26 11:43:09,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30637 conditions, 16460 events. 10192/16460 cut-off events. For 454/454 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 127252 event pairs, 7600 based on Foata normal form. 0/13330 useless extension candidates. Maximal degree in co-relation 30628. Up to 13652 conditions per place. [2023-08-26 11:43:09,901 INFO L140 encePairwiseOnDemand]: 407/409 looper letters, 45 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-26 11:43:09,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 84 transitions, 277 flow [2023-08-26 11:43:09,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:43:09,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:43:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-08-26 11:43:09,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099429502852486 [2023-08-26 11:43:09,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-08-26 11:43:09,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-08-26 11:43:09,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:43:09,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-08-26 11:43:09,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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) [2023-08-26 11:43:09,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-08-26 11:43:09,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-08-26 11:43:09,906 INFO L175 Difference]: Start difference. First operand has 85 places, 85 transitions, 187 flow. Second operand 3 states and 503 transitions. [2023-08-26 11:43:09,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 84 transitions, 277 flow [2023-08-26 11:43:09,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:43:09,908 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 186 flow [2023-08-26 11:43:09,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2023-08-26 11:43:09,909 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, -5 predicate places. [2023-08-26 11:43:09,909 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 186 flow [2023-08-26 11:43:09,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 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) [2023-08-26 11:43:09,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:09,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:43:09,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:43:09,910 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:43:09,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:09,910 INFO L85 PathProgramCache]: Analyzing trace with hash 916906872, now seen corresponding path program 1 times [2023-08-26 11:43:09,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:09,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928088220] [2023-08-26 11:43:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:09,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:43:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:43:09,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:43:09,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928088220] [2023-08-26 11:43:09,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928088220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:43:09,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:43:09,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:43:09,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912937474] [2023-08-26 11:43:09,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:43:09,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:43:09,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:43:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:43:09,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:43:09,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 409 [2023-08-26 11:43:09,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:43:09,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:43:09,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 409 [2023-08-26 11:43:09,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:43:12,598 INFO L124 PetriNetUnfolderBase]: 35923/50690 cut-off events. [2023-08-26 11:43:12,598 INFO L125 PetriNetUnfolderBase]: For 884/884 co-relation queries the response was YES. [2023-08-26 11:43:12,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101514 conditions, 50690 events. 35923/50690 cut-off events. For 884/884 co-relation queries the response was YES. Maximal size of possible extension queue 2436. Compared 352477 event pairs, 16630 based on Foata normal form. 0/39410 useless extension candidates. Maximal degree in co-relation 101504. Up to 47464 conditions per place. [2023-08-26 11:43:12,993 INFO L140 encePairwiseOnDemand]: 399/409 looper letters, 95 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2023-08-26 11:43:12,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 108 transitions, 442 flow [2023-08-26 11:43:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:43:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:43:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-08-26 11:43:12,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39119804400978 [2023-08-26 11:43:12,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-08-26 11:43:12,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-08-26 11:43:12,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:43:12,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-08-26 11:43:12,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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) [2023-08-26 11:43:12,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-08-26 11:43:12,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-08-26 11:43:12,998 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 186 flow. Second operand 3 states and 480 transitions. [2023-08-26 11:43:12,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 108 transitions, 442 flow [2023-08-26 11:43:13,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 108 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:43:13,001 INFO L231 Difference]: Finished difference. Result has 87 places, 87 transitions, 221 flow [2023-08-26 11:43:13,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=87, PETRI_TRANSITIONS=87} [2023-08-26 11:43:13,002 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, -3 predicate places. [2023-08-26 11:43:13,002 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 87 transitions, 221 flow [2023-08-26 11:43:13,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:43:13,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:13,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:43:13,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:43:13,003 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:43:13,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:13,003 INFO L85 PathProgramCache]: Analyzing trace with hash -669033167, now seen corresponding path program 1 times [2023-08-26 11:43:13,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:13,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853033192] [2023-08-26 11:43:13,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:13,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:43:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:43:13,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:43:13,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853033192] [2023-08-26 11:43:13,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853033192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:43:13,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:43:13,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:43:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487574608] [2023-08-26 11:43:13,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:43:13,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:43:13,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:43:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:43:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:43:13,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 409 [2023-08-26 11:43:13,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 87 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 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) [2023-08-26 11:43:13,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:43:13,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 409 [2023-08-26 11:43:13,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:43:17,243 INFO L124 PetriNetUnfolderBase]: 47781/68041 cut-off events. [2023-08-26 11:43:17,244 INFO L125 PetriNetUnfolderBase]: For 6080/6080 co-relation queries the response was YES. [2023-08-26 11:43:17,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142304 conditions, 68041 events. 47781/68041 cut-off events. For 6080/6080 co-relation queries the response was YES. Maximal size of possible extension queue 3634. Compared 506677 event pairs, 16811 based on Foata normal form. 310/57416 useless extension candidates. Maximal degree in co-relation 142292. Up to 29711 conditions per place. [2023-08-26 11:43:17,585 INFO L140 encePairwiseOnDemand]: 397/409 looper letters, 207 selfloop transitions, 14 changer transitions 0/230 dead transitions. [2023-08-26 11:43:17,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 230 transitions, 1011 flow [2023-08-26 11:43:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 11:43:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 11:43:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 957 transitions. [2023-08-26 11:43:17,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3899755501222494 [2023-08-26 11:43:17,588 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 957 transitions. [2023-08-26 11:43:17,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 957 transitions. [2023-08-26 11:43:17,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:43:17,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 957 transitions. [2023-08-26 11:43:17,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.5) internal successors, (957), 6 states have internal predecessors, (957), 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) [2023-08-26 11:43:17,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 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) [2023-08-26 11:43:17,593 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 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) [2023-08-26 11:43:17,593 INFO L175 Difference]: Start difference. First operand has 87 places, 87 transitions, 221 flow. Second operand 6 states and 957 transitions. [2023-08-26 11:43:17,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 230 transitions, 1011 flow [2023-08-26 11:43:17,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 230 transitions, 1005 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:43:17,602 INFO L231 Difference]: Finished difference. Result has 93 places, 96 transitions, 308 flow [2023-08-26 11:43:17,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=93, PETRI_TRANSITIONS=96} [2023-08-26 11:43:17,602 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 3 predicate places. [2023-08-26 11:43:17,602 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 96 transitions, 308 flow [2023-08-26 11:43:17,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 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) [2023-08-26 11:43:17,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:17,603 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 11:43:17,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:43:17,603 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:43:17,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:17,603 INFO L85 PathProgramCache]: Analyzing trace with hash 808544066, now seen corresponding path program 1 times [2023-08-26 11:43:17,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:17,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49242603] [2023-08-26 11:43:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:17,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:43:17,611 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:43:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:43:17,618 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:43:17,619 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:43:17,619 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-08-26 11:43:17,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (9 of 11 remaining) [2023-08-26 11:43:17,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (8 of 11 remaining) [2023-08-26 11:43:17,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 11:43:17,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 11:43:17,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 11 remaining) [2023-08-26 11:43:17,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (4 of 11 remaining) [2023-08-26 11:43:17,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 11 remaining) [2023-08-26 11:43:17,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 11:43:17,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 11 remaining) [2023-08-26 11:43:17,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (0 of 11 remaining) [2023-08-26 11:43:17,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 11:43:17,620 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 11:43:17,620 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:43:17,620 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 11:43:17,648 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:43:17,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 277 transitions, 586 flow [2023-08-26 11:43:17,681 INFO L124 PetriNetUnfolderBase]: 33/331 cut-off events. [2023-08-26 11:43:17,681 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 11:43:17,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 331 events. 33/331 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1345 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 263. Up to 10 conditions per place. [2023-08-26 11:43:17,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 277 transitions, 586 flow [2023-08-26 11:43:17,686 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 257 places, 277 transitions, 586 flow [2023-08-26 11:43:17,686 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:43:17,686 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 257 places, 277 transitions, 586 flow [2023-08-26 11:43:17,686 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 257 places, 277 transitions, 586 flow [2023-08-26 11:43:17,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 277 transitions, 586 flow [2023-08-26 11:43:17,799 INFO L124 PetriNetUnfolderBase]: 33/331 cut-off events. [2023-08-26 11:43:17,800 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 11:43:17,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 331 events. 33/331 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1345 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 263. Up to 10 conditions per place. [2023-08-26 11:43:17,812 INFO L119 LiptonReduction]: Number of co-enabled transitions 52704 [2023-08-26 11:43:21,625 INFO L134 LiptonReduction]: Checked pairs total: 202390 [2023-08-26 11:43:21,626 INFO L136 LiptonReduction]: Total number of compositions: 256 [2023-08-26 11:43:21,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:43:21,627 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=false, 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;@f70d384, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:43:21,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-08-26 11:43:21,628 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:43:21,628 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:43:21,628 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:43:21,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:21,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:43:21,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 11:43:21,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:21,628 INFO L85 PathProgramCache]: Analyzing trace with hash 65788, now seen corresponding path program 1 times [2023-08-26 11:43:21,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:21,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061291457] [2023-08-26 11:43:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:21,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:43:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:43:21,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:43:21,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061291457] [2023-08-26 11:43:21,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061291457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:43:21,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:43:21,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:43:21,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948097299] [2023-08-26 11:43:21,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:43:21,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:43:21,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:43:21,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:43:21,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:43:21,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 533 [2023-08-26 11:43:21,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 136 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 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) [2023-08-26 11:43:21,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:43:21,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 533 [2023-08-26 11:43:21,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:43:39,430 INFO L124 PetriNetUnfolderBase]: 206479/293712 cut-off events. [2023-08-26 11:43:39,430 INFO L125 PetriNetUnfolderBase]: For 17200/17200 co-relation queries the response was YES. [2023-08-26 11:43:40,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557538 conditions, 293712 events. 206479/293712 cut-off events. For 17200/17200 co-relation queries the response was YES. Maximal size of possible extension queue 12896. Compared 2552546 event pairs, 155296 based on Foata normal form. 16266/249162 useless extension candidates. Maximal degree in co-relation 40236. Up to 254398 conditions per place. [2023-08-26 11:43:41,072 INFO L140 encePairwiseOnDemand]: 516/533 looper letters, 58 selfloop transitions, 1 changer transitions 0/110 dead transitions. [2023-08-26 11:43:41,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 110 transitions, 370 flow [2023-08-26 11:43:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:43:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:43:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2023-08-26 11:43:41,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4165103189493433 [2023-08-26 11:43:41,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2023-08-26 11:43:41,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2023-08-26 11:43:41,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:43:41,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2023-08-26 11:43:41,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 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) [2023-08-26 11:43:41,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 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) [2023-08-26 11:43:41,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 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) [2023-08-26 11:43:41,077 INFO L175 Difference]: Start difference. First operand has 119 places, 136 transitions, 304 flow. Second operand 3 states and 666 transitions. [2023-08-26 11:43:41,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 110 transitions, 370 flow [2023-08-26 11:43:41,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 110 transitions, 358 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-26 11:43:41,089 INFO L231 Difference]: Finished difference. Result has 109 places, 110 transitions, 242 flow [2023-08-26 11:43:41,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=109, PETRI_TRANSITIONS=110} [2023-08-26 11:43:41,090 INFO L281 CegarLoopForPetriNet]: 119 programPoint places, -10 predicate places. [2023-08-26 11:43:41,090 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 110 transitions, 242 flow [2023-08-26 11:43:41,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 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) [2023-08-26 11:43:41,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:41,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:43:41,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:43:41,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 11:43:41,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:41,091 INFO L85 PathProgramCache]: Analyzing trace with hash 65789, now seen corresponding path program 1 times [2023-08-26 11:43:41,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:41,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460992852] [2023-08-26 11:43:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:41,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:43:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:43:41,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:43:41,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460992852] [2023-08-26 11:43:41,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460992852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:43:41,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:43:41,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:43:41,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065733077] [2023-08-26 11:43:41,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:43:41,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:43:41,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:43:41,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:43:41,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:43:41,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 533 [2023-08-26 11:43:41,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 110 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 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) [2023-08-26 11:43:41,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:43:41,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 533 [2023-08-26 11:43:41,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:43:52,530 INFO L124 PetriNetUnfolderBase]: 132813/191581 cut-off events. [2023-08-26 11:43:52,530 INFO L125 PetriNetUnfolderBase]: For 4246/4246 co-relation queries the response was YES. [2023-08-26 11:43:53,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361282 conditions, 191581 events. 132813/191581 cut-off events. For 4246/4246 co-relation queries the response was YES. Maximal size of possible extension queue 8373. Compared 1625486 event pairs, 98691 based on Foata normal form. 0/160911 useless extension candidates. Maximal degree in co-relation 361272. Up to 164759 conditions per place. [2023-08-26 11:43:53,789 INFO L140 encePairwiseOnDemand]: 531/533 looper letters, 57 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2023-08-26 11:43:53,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 356 flow [2023-08-26 11:43:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:43:53,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:43:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2023-08-26 11:43:53,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083802376485303 [2023-08-26 11:43:53,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2023-08-26 11:43:53,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2023-08-26 11:43:53,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:43:53,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2023-08-26 11:43:53,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 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) [2023-08-26 11:43:53,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 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) [2023-08-26 11:43:53,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 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) [2023-08-26 11:43:53,794 INFO L175 Difference]: Start difference. First operand has 109 places, 110 transitions, 242 flow. Second operand 3 states and 653 transitions. [2023-08-26 11:43:53,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 356 flow [2023-08-26 11:43:53,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 109 transitions, 355 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:43:53,798 INFO L231 Difference]: Finished difference. Result has 109 places, 109 transitions, 241 flow [2023-08-26 11:43:53,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=109, PETRI_TRANSITIONS=109} [2023-08-26 11:43:53,799 INFO L281 CegarLoopForPetriNet]: 119 programPoint places, -10 predicate places. [2023-08-26 11:43:53,799 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 109 transitions, 241 flow [2023-08-26 11:43:53,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 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) [2023-08-26 11:43:53,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:43:53,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:43:53,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:43:53,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 11:43:53,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:43:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash 565086730, now seen corresponding path program 1 times [2023-08-26 11:43:53,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:43:53,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068201432] [2023-08-26 11:43:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:43:53,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:43:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:43:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:43:53,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:43:53,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068201432] [2023-08-26 11:43:53,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068201432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:43:53,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:43:53,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:43:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283501746] [2023-08-26 11:43:53,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:43:53,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:43:53,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:43:53,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:43:53,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:43:53,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 533 [2023-08-26 11:43:53,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 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) [2023-08-26 11:43:53,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:43:53,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 533 [2023-08-26 11:43:53,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand